Meeting of Operation Coordination Committee (OCC) · 2020-01-08 · Meetings at Hyderabad. First...

162nd OCC Meeting held on 10.12.2019 at SRPC, Bengaluru

Minutes of the 162nd Meeting of Operation Coordination Committee (OCC) held at SRPC Bengaluru on 10.12.2019

1. Introduction

1.1 The 162nd Meeting of Operation Coordination Committee of SRPC was held on 10th

December 2019 at SRPC, Bengaluru. The list of participants is given at Annexure-1A.

1.2 Shri A Balan, Member Secretary, SRPC welcomed all the participants to 162nd OCC Meeting. He stated that last month there were many meetings/workshops conducted to discuss various important issues as follows:

Technical Workshop on “Solar Power Forecasting” held at Bengaluru on 4th & 5th Nov. 2019 which was organized by NIWE & GIZ.

Result Dissemination workshop on Controlling Power Generation & Ancillary Services from RE(Wind & Solar) generators organized by M/s GIZ. The final draft report had been circulated among the states for comments. SRPC had submitted their comments.

A Special Meeting was held on 07thNovember 2019 to discuss the Accounting Methodology during diversion of RSTPS share of Goa through WR.

Meeting on UNMS and ISTS communication system was convened on 11.11.2019 and minutes are available at SRPC website. The recommendations/decisions would be put up in the forthcoming SRPC Meeting for consideration.

Meeting on Communication availability from NLDC/RLDC to nearest wideband node/switch yard for the generating station under AGC as per CERC Order 319/RC/2018 dated 28.08.2019 was held on 13.11.2019.

7th PSS Meeting was held on 14.11.2019. Active participation of many generators in the Meeting was appreciated.

A Special Meeting was held on 05.12.2019 to discuss the scheduling issues of Pavagada Solar Park.

A special meeting of Commercial Subcommittee was held on 09.12.2019 to discuss on availing of construction power to KKNPP Units 3, 4,5& 6 from Units 1 & 2.

Joint Study Group Meetings of Transmission Planning were held on 21st /22nd of November 2019 at New Delhi. Special Meetings to discuss delay in commissioning of Kaiga and KKNPP reactors & delinking of 400kV RTPS-BTPS-JSW- Guttur line at 400kV JSW SS were also held on 22nd November 2019 at CEA. MoMs of all the Meetings have been circulated by CEA. Chairperson, CEA felt that operational issues may be handled at RPC level itself.


9th NPC Meeting was held on 22.11.2019 at NRPC. Chairperson, SRPC and Chairperson, TCC and MS, SRPC had attended the meeting. Many important issues were discussed, minutes of the meeting is awaited.

PSDF review Meeting was held on 25.11.2019 at SRPC, Bengaluru which was chaired by Member (GO & D), CEA. Minutes of the meeting is awaited.

He informed that CERC had extended the date for giving comments on Draft CERC (Sharing of Inter-State Transmission Charges and Losses) Regulations, 2019 up to 31st December 2019. He requested all the entities to give their proper feedback in advance so that it could be considered/incorporated in final notification. Feedback after notifying the regulations may not be considered. SRPC had already furnished comments from RPC side.

All Renewable Energy Generation Companies are requested to intimate the commissioning of RE generation capacity to CEA whenever a new generator is commissioned (Notice available on CEA website). He requested all concerned to take up with RE generators and assure that the information as required is communicated to RPM Division, CEA as per the format given.

He informed that 36th TCC and 37th SRPC Meetings would be held on 31st January 2020and 1st February 2020. TSTRANSCO/TSGENCO had kindly agreed to host the Meetings at Hyderabad.

First Meeting of SRPC TP is scheduled on 16.12.2019 at Hyderabad.

He wished that this meeting will be helpful in taking decisions to help in secure grid operation.

1.3 SE(O), SRPC took up the agenda for discussions.

2. Confirmation of the Minutes of the 161stMeeting of OCC of SRPC held on

10thNovember 2019 at SRPC, Bengaluru. The Minutes of the 161st OCCM were confirmed.

3. MAJOR ISSUES

3.1 Status of URTDSM PMU shifting as agreed in the 36th SRPC Meeting Shifting of PMUs(considering the requirements of SR Grid in view of large integration

of RE and commissioning of LI projects) had been discussed in the 156th/157th OCC Meetings and subsequently in 36th SRPC Meeting held on 12.07.2019. SRPC had approved that the charges towards shifting of PMU would be booked by PGCIL under O&M or any other project.

It was noted that Under URTDSM project (commissioned in September 2018) 255 PMUs were installed in 65 S/Ss of SR. Total PMUs in SR II is 158 in which 142 PMUs were installed under URTDSM and the balance (16) PMUs were installed under respective transmission projects. SR I have installed 113 PMUs.


In the 160th OCC Meeting, SR I & SR II had agreed to shift the PMUs from unutilized stations to STATCOM locations (Hyderabad, Udumalpet and Trichy). Also it was decided that SRLDC and SR II would discuss and finalize the RTU movement w.r.t RE locations (from where to where).

In the 161st OCC Meeting, it was noted that SRLDC vide letter dated 08.11.2019 had taken up the issue of shifting of the PMUs at STATCOM, RE, Pump locations etc. with PGCIL

SR II vide letter dated 19.11.2019(Annexure-3A) had informed that shifting and decommissioning of PMU panels from Tirunelveli S/S to Udumalapet S/S and Trichy S/s are in tendering process and orders are to be placed by December 2019 and work completion is expected by January 2020. Further optimization of PMU configuration is not possible in any other locations of SRTS II and balance requirement may be incorporated in URTDSM Phase II Project.

SR I vide letter dated 18.11.2019(Annexure-3B) had informed that PMU from Srikakulam had been shifted to Hyderabad (Ghanapur) and is integration is underway. Balance requirement may be incorporated in URTDSM Phase II Project.

Subsequently SR I had informed that PO for commissioning works had been given to M/s GE and commissioning is expected by 15th December 2019.

SRLDC vide letters dated 25.11.2019(Annexure-3C) had requested SRTS I & SRTS II that shifting work of PMUs may be completed as approved in SRPC Meeting. It was also requested that the status of shifting of PMUs may kindly be updated and probable date of commissioning of PMUs in new location may be intimated at the earliest.

In the Meeting, SRLDC expressed concern regarding the delay in shifting the PMUs as approved in the SRPC Meeting.

SR I informed that in the 36th SRPC Meeting SR I & SR II were requested to explore the possibility of shifting the PMUs as listed out. PMU from Srikakulam had been shifted to Hyderabad (Ghanapur) (STATCOM) and is being integrated.Regarding shifting of PMUs from Vemagiri to APTRANSCO S/Ss (KTS-6{PST}, Ramagudu{LI}, Medaram{LI}) SR I expressed difficulties faced by them in coordinating with APTRANSCO/TSTRANSCO (during the execution of URTDSM Phase I project) and suggested that this may be taken up in URTDSM Phase II project. Many issues like permission to enter into S/Ss, lack of coordination, approvals etc were faced by PGCIL. Management had taken a decision that shifting of PMUs to non Powergrid stations will not be taken up by Powergrid.

SRLDC informed that these proposals are required in selected critical locations from grid operation point of view considering RE integration, LI projects, phase shifting transformers and network changes which havetaken place. SRPC decisions can be relooked only if specific technical issues are pointed out. Citing coordination/support issues the proposals cannot be dropped. SRLDC stated that even the funding issues had been addressed.


SE(O), SRPC stated that as per CEA’s Connectivity Regulations, system operators are empowered to get any real time operational data, SCADA data etc as prescribed by them.

MS, SRPC requested APTRANSCO and TSTRANSCO to extend support to PGCIL to carry out the works from grid security point of view.

DE,APTRANSCO said that a Powergrid representative may accompany M/s GE when they come for installation/or any other works in APTRANSCO substations. He assured that they will cooperate in carrying out the works. Prior information needs to be communicated by PGCIL.

SR II & SR I agreed for the proposals for addition of feeders in the PMUs. It was suggested that the issue may also be discussed with higher management during the SRPC TP Meeting scheduled on 16.12.2019 at Hyderabad.

Conclusion in the Meeting: SR I informed that PMU from Srikakulam had been shifted to Hyderabad

(Ghanapur) (STATCOM) and PO for commissioning works had been given to M/s GE and commissioning is expected by 15th December 2019.

APTRANSCO/TSTRANSCO assured of required support at their end. Advance information needed to be communicated by PGCIL.

After deliberations, SR I & SR II agreed to take up the other proposals of adding feeders to existing PMUs (Karaikudi(SR-II), Narnoor & Mahboobnagar (SR I)).

SR I stated that the discussions in the OCC would be communicated to the Higher Management.

3.2 Delay in payment by NTPC to Powergrid SR I in respect of LDP

In the Meeting,SR I expressed concern regarding the non-payment from NTPC Simhadri for the LDP relays (Line Differential Protection ) procured by Powergrid from M/s GE on behalf of NTPC (as recommended by sub committees of SRPC).

NTPC requested SR I to furnish the details in this regard and assured that the issue would be solved bilaterally/amicably.

3.3 Outage of SCADA data of RTUs

SRLDC vide E-mail dated 15.11.2019 had informed regarding the continuous outage of SCADA data of 104 protocol RTUs. Some of the RTUs have been revived and are reporting to main SLDC. The data of all 104 protocol RTUs are not reporting to SRLDC back up Control Center.

RTUs at Karaikudi, Dharmapuri, C-Peta, Vijayawada, Khammam, Kudgi, N P Kunta& NLC TS II Exp.etc are not reporting to SRLDC Main & Back Up Control Centre.

SRLDC requested PGCIL to analyze the issue for ensure proper rectification and non-repetition of such outages. Corrective action may be shared with SRLDC. Many RTUs are under process of conversion to 104 protocol.


In the Meeting, SRLDC expressed concern regarding the outage at Ghanapur, Khammam, Trivandrum, Hosur, Vijayawada, Trivandrum and Trichy where 101 protocol had been upgraded to 104 protocol. SRLDC suggested that the works may be held up till the existing issues are resolved. Neyveli TS II data is not reporting since two and a half month despite of continuous follow up by SRLDC. Communication dated 13.11.2019 in this regard to PGCIL is at Annexure-3D) There was no response from PGCIL.

SR II informed that the issues have surfaced during upgrading of RTUs from 101 protocol to 104 protocol. Issues at Kudgi, Dharmapuri, Vijayawada and Khammam had been rectified. The issues of the remaining stations would be resolved within 15 days. SR II informed that NLCIL issue is due to NLCIL equipment compatibility issue and lack of coordination at NLCIL/vendor end.

NLCIL informed that they are coordinating with PGCIL.

MS, SRPC opined that communication is a vital part facilitating smooth system operation. Without proper data, real time operation is at risk. He suggested that communication experts may be made available at each generating station, important sub stations etc so that the issues may be resolved in a short period.

Conclusion in the Meeting: SRLDC expressed concern on continuous outage of SCADA data of 104 protocol

RTUs. NLC TS II Expansion data was not updated since one and a half month.

SR II informed that the problem had been observed during reconfiguration while upgrading of RTU protocol from 101 to 104. Support from SRLDC was also required to resolve the issues. The issues would be resolved within 15 days.

NLCIL and SRTS II agreed to resolve the NLC TS II Expansion issues within one week.

SRLDC suggested PGCIL to hold up the works of upgrading of RTUs to 104 protocol till the current issues are resolved.

3.4 Preparedness for Solar eclipse on 26th December 2019 - Handling Solar generation steep reduction/increase Solar eclipse would be experienced on 26th December 2019 and it will mainly pass

through southern part of India, severely effecting solar generation in Southern Region. Solar eclipse starts approximately at 08:00 hrs and ends by 11:30 hrs.

In the 161st OCC SRLDC had presented regarding the effect of Solar Eclipse in SR. All the states had assured that they can manage their load generation balance during the solar eclipse with the available resources and proper load management.

Subsequently SRDC vide E-mail dated 25.11.2019 had furnished the operational planning for solar eclipse day for Southern Region.

All the constituents had been requested to plan their load generation balance accordingly.


In the Meeting SRLDC informed that in the last meeting SRLDC had furnished the operational planning for each states and states were requested to come with their own plan for control area wise LGB plan and submit to SRLDC.

KPCL informed that they have communicated to all the generators to not to take out any units on solar eclipse day. In Karnataka 3600 MW Hydro power is available. If at 08:00 hours LGB can be met by 1500 MW in KPTCL control area, from 08:00 hours 2000 MW can be added at the appropriate ramp till solar eclipse ends. KPTCL and KPCL needed to coordinate and finalize the schedules.

APTRANSCO informed that they have given instructions to GENCOs in this regard. APTRANSCO was requested to take up specifically with Solar generators also. Operators should be made available at solar generating stations on that day.

TANTRANSCO informed that they have circulated operation plan for solar eclipse day to all the concerned which will be shared to SRLDC/SRPC. TSTRANSCO informed that they can manage with Srisailam and N’sagar. LI schedule also may be rescheduled. TSTRANSCO was requested to prepare a document and submit to SRLDC.

SRPC requested ISG Stations to put additional staff in control rooms of stations to control the generation/keep required ramp in case of emergency.

SRLDC informed that POSOCO(NLDC) had prepared a report on Solar Eclipse which is available at NLDC website in the following link:

https://posoco.in/wp-content/uploads/2019/12/Solar-Eclipse-26th-December-2019-Indian-Power-System-likely-impacts-and-preparedness-A-report.pdf

The following are the three major steps of concern:

1. Creating awareness among the concerned entities

2. Accurate estimation/forecasting of solar generation.

3. Acting as per the operation planning prepared

The following were concluded:

SRLDC had furnished the operational planning guidelines for solar eclipse day for LGB management.

All SLDCs informed that the plan had been worked out. All SLDCs were requested to finalize the plan (block wise) and submit to SRLDC.

ISG stations were requested to maintain adequate staff in the control room during the eclipse.

SRLDC informed that NLDC had uploaded an operational planning report which can be downloaded from NLDC website.

The final presentation & operational planning guidelines can be downloaded which is separately uploaded as Annexure-3E.


3.5 Emergency shutdown SRLDC informed that as requests are made through web portal, emergency &

opportunity shutdown, requests are also needed to be uploaded in the web portal. SRLDC demonstrated the procedure. In the outage web portal another link is given as emergency shutdown (for OSD also same needed to be selected and comment may be made as OSD). Entities can request on D-1 or D day.

MS, SRPC stated that emergency shut downs needed to be discouraged until unless real emergency is there. There is no provision for checking the gravity of emergency.

SR I informed that they are not able to download the outage request by other agency of Powergrid lines (if the line is owned by PGCIL and S/Ss owned by other agencies and line shutdown requested by other agencies). The request copy is required to be submitted to SRPC for availability certification purpose.

SRLDC informed that they will look into the provision of enabling download shutdown proposal/approvals by all irrespective of the ownership of the element.

SE(O), SRPC reiterated that emergency shut downs may be taken up by SRLDC and SRPC concurrence may not be needed. As per IEGC Clause 5.2, in case of contingencies like threat to grid security, equipment failure, life threat to human beings etc., elements can be taken out and may be informed subsequently.

3.6 Kudgi PG test/ NTECL ramp test/ Simhadri APC Test

Ramp Test: NTECL In the 161st OCC Meeting, all the states had agreed for the giving schedules for ramp

tests of NTECL. NTECL was requested to give the schedule on D-1 and on the day also and the states would be informed accordingly.

Kudgi PG Test Kudgi had furnished the schedule from 04.12.2019 to 07.12.2019 for combustion

adjustment / tuning and from 09.12.2019 to 13.12.2019 for performance guarantee test. Full load for 8 to 10 hours would be required. Communications to States dated 09.11.2019 in this regard from Kudgi is at Annexure-3F

Subsequently NTPC Kudgi vide E-mail dated 08.12.2019 had informed that NTPC is going to synchronize Unit-2 at 18:00 hrs on 9th Dec'19 for carry out Boiler PG test and related activities. NTPC will intimate SRLDC control room regarding the required schedule pattern (above tech min) on D-1 on daily basis. In view of SCED operation, to facilitate smooth conductance of the Boiler PG test and related activities, it was requested to change the Technical Minimum to 750 MW during the test period (16:00 hrs to 24:00 hrs)

Simhadri APC test


NTPC Simhadri vide letter dated 10.12.2019(Annexure-3G) had requested for special generation schedule to facilitate conductance of Site Acceptance Test(SAT) of Advanced Process Control (APC) package.

The following were noted:

Advance Process Control (APC) package is under implementation in all the four units of Simhadri. The package is a very significant project as based on the success of this project the same is going to be implemented by all generators to enhance better stability to grid and economic power generation. APC has been commissioned in U-3 &4 of Simhadri and tests are to be conducted for assessment & efficacy of new control loops.

Capturing complete data as per attached schedule is essential and forms base for successful operation of APC. Implementation of successful APC will go a long way in achieving desired ramp rates without parameter excursions and helps in maintaining health of the machine for reliable operation leading to reliable grid. Initially test will be done in Unit-4, after that similar tests need to be done in Unit-3. The tests are scheduled to be started from 10.12.2019 & total no. of tests is to be done in a span of 8 days.

After deliberations the following were concluded:

It was agreed that testing would be carried out between 16:00 hours to 22:00 hours preferably on week days (Monday to Friday).

It was agreed that NTPC/NTECL would discuss among themselves and come out with schedule of testing. The same would be informed to beneficiaries/SRLDC at least 5 days in advance and would be confirmed on D-1 day.

The test would be allowed at only one station at a time.

3.7 RSD Issues

TSTRANSCO request to SRLDC to examine the possibility of one or two units Ramagundam, NTPC under RSD TSTRANSCO vide letter dated 29.10.2019 had informed that TS share (345 MW) from

Ramagunadam Units(I-VI) is being surrendered on day ahead basis. SRLDC may examine the possibility of one or two units of NTPC, Ramagundam under RSD and can accommodate other beneficiary share from other on-bar units so that other beneficiaries will not be affected and TS can maintain their LGB optimally under current low demand and high hydro generation availability period.

161st OCC conclusion All the states were requested to revert back on the following before next OCC meeting:

During the day of operation, SRLDC would take a call on the unit to go on RSD or not depending on the grid conditions as per clause 6.2.2 of the Procedure.

Whether the monitoring could be retained at 8 hours, or could be reduced to 4 hours or the technical minimum criteria could be removed completely


on D-1 and on day of operation (requisitions as requested by beneficiaries would be communicated to the generators).

It was agreed to follow the procedure as agreed in the 154thOCC meeting till further conclusion.

In the Meetingall the states except TSTRANSCO opined that the procedure as agreed in the 154th OCC would be continued.

RSD Procedure- TSTRANSCO proposal:

TSTRANSCO vide letter dated 03.12.2019(Annexure-3H) had furnished certain cases to be considered for taking out generating units under shutdown (surrendered quantum by single beneficiary/multiple beneficiaries is equivalent to ex-bus capacity of one unit). TSTRANSCO desired discussion on the proposal in the forth coming OCC Meeting and also preferred to submit the same to CERC.

In the meeting, it was decided that the new TSTRANSCO proposal would be further discussed in the next OCC Meeting. States were requested to give their comments in this regard.

3.8 High voltage in NTECL evacuation lines

NTECL vide E-mail dated 06.12.2019 had expressed concern regarding high voltage experienced in NTECL evacuation lines. Voltage of 400 kV lines during November 2019 is enclosed at Annexure-3I. NTECL pointed out that generators are operating in extreme points of capability curve (maximum MVAR absorption). In spite of high MVAR absorption, all running equipments are subjected to higher voltage than rated. NTECL requested to kindly look into high line voltage at NTECL, Vallur and accord permission to take out lines during high line voltage condition.

In the Meeting, NTECL expressed serious concern regarding the high voltage experienced in NTECL evacuation lines.

MS, SRPC desired to know the capacitor status(on or off) in the high voltage areas in TANTRANSCO/TANGEDCO system. He suggested that all capacitors needed to be switched off to arrest the high voltage. He also recommended that the node wise flow of MVAR needed to be assessed for all the lines to find out whether lines are injecting MVAR to generator side.

TANTRANSCO informed that they have taken up the issue with TANGEDCO. TANTRANSCO confirmed that the TANTRANSCO capacitor banks at 110 kV level and above are switched off. DISCOM level status needed to be checked.

The following were noted after deliberations: TANTRANSCO was requested to take up the issue of capacitor switching off with

TANGEDCO. TNSLDC may study the reactive power absorption at nearby generating stations

and direct the generators suitably. Reactive power absorption at Basin Bridge could also be examined.


TNSLDC/SRLDC may examine opening of lightly loaded lines during high voltage conditions. Reactor healthiness could also be ascertained.

3.9 High voltage condition maintained in various southern part of TN

TANTRANSCO vide letter dated 07.12.2019(Annexure-3J) had informed that during low demand period many nodes in the Southern part of Tamil Nadu at 230 kV and 110 kV level are experiencing high voltage problems. To minimize the voltages lengthy lines/lightly loaded lines connected to these nodes are being disconnected. To avoid damage to equipments it is requested to keep PGCIL ICTs nearby these nodes at standby condition.

In the Meeting, SRLDC & PGCIL stated that there won’t be any noticeable improvement in voltage even if transformer is kept in idle charged condition as transformer will absorb very meager MVARat no load. SRLDC felt that some protection issues may also arise.

After discussion the forum concluded that there may not be any tangible improvement by keeping the PGCIL ICTs nearby these nodes in standby condition (in idle charge).

3.10 Deemed availability computation of M/s STPP U1 & U2

TSTRANSCO vide letter dated 27.11.2019(Annexure-3K) had requested for clarification regarding availability computation of M/s STPP U1 & U2 during the disturbance occurred at 400 kV Ramagudu substation in the month of March 2019/during PG tests :

Is there any timeline to consider deemed availability during black out condition other than normal hot start up time timelines

Is there any precedence to consider higher DC for considering PG tests in addition

In the Meeting, TSTRANSCO informed that on 12.03.2019 at 17:02 hours there was a disturbance at 400 kV Ranadugu substation which led to tripping of 2x600 MW STPP units on loss of evacuation. The units were synchronized at 16:12 hours on 13.03.2019 and on 16.03.2019 at 12:06 hours respectively. TSTRANSCO certified the availability as per the information furnished by STPP for hot star up time and time to reach full load etc. But STPP had raised certain issues regarding this certification and TSTRANSCO requested for guidance of OCC forum in this regard. Further TSTRANSCO had desired to know whether any provision is there to consider higher DC during PG tests etc.

The following were noted in the Meeting: There was no approved procedure for deemed availability (DC) for ISG stations

during complete black out as it had not been defined upto which time period from the time the external power is extended to the generating station the DC can be assured.

NTPC/NLCIL/NTECL/NTPL stated that they would examine and revert back by next OCC.


The issue of considering higher DC during PG tests (TSTRANSCO query) would also be discussed in the next OCC.

3.11 SR II Agenda Items

PGCIL, SRTS II vide letter dated 04.12.2019(Annexure-3L) had requested the following issues to be discussed in the 162nd OCC Meeting.

a) Clearance Issue: Construction of dead end tower of 230 kV Rasipalayam-Mywadi feeder by TANTRANSCO near 400 kV Salem-Udumalpet line.

b) Signing of charging clearance formats of SRLDC

The following were noted in the Meeting:

TANRANSCO informed that the tower is yet to be dismantled, action is being taken by TANTRANSCO for the same. Another tower is being constructed with required clearance from Salem-Udumalpet line.

SR II requested TANTRANSCO to furnish the updated drawings. Regarding signing of charging clearance formats TANTRANSCO informed

that the formats had been sent to different wings and requested PGCIL to forward the same to TNSLDC for them to facilitate the signing.

3.12 Clarification for decrease in Wind/Solar power generation in October 2019 in comparison to October 2018

CEA vide letters dated 28.11.2019(Annexure-3M) had requested states to furnish the reason for reduction in generation of Wind & Solar in October 2019 compared to October 2018 to CEA urgently.

Also it was informed that the information as requested vide CEA letter dated 19.09.2019 requesting sharing of data of curtailment as per instruction issued by RLDCs to their respective SLDC vide their letter dated 06.08.2019 for the months of September and October 19 is still not received.

It is requested that both these information may please be shared urgently on email id :[email protected]. and [email protected].

It was noted that Joint Advisor, NITI Aayog vide email dated 18.09.2019 has sought information about curtailment of RE generation for preparing a report on reference sent by PMO.

In the Meeting it was noted that TS and TN had submitted the data, AP and Karnataka were requested to furnish the reason by 11.12.2019.

3.13 Renewable forecasting

As requested by OCC forum SRLDC presented the forecast, actuals and forecast errors for wind and solar for the previous month in the OCC Meeting. All states had been requested to furnish the implemented forecast, day ahead forecast & actuals also(before 5th of every month). It was noted that this data was being sought by higher forums and other entities.


In the Meeting, SRLDC presented the forecast, actuals and forecast errors for wind and solar for the months of October 2019 and for November 2019.

It was observed that Telangana forecast error for Solar was better compared to other states.

AP solar actuals were always less than forecast.

KAR solar actuals were much more than the forecast.

TN had furnished data for wind. Solar forecast was not furnished. Solar forecast to be started by NIWE.

All the states were requested to analyse the forecast errors for improvement. Improved forecast will help in better planning of LGB of individual state.

3.14 Daily Load Forecasting by SLDCs

In the Meeting SRLDC presented the error (forecast Vs actual demand) for the month of November 2019(Annexure-3M-1). Except KPTCL all the states showed nominal error. KPTCL error was more on 1st & 2nd of November 2019 because of holidays on account of Karnataka Rajyothsava.

3.15 URTDSM project

SLDCs to make use of the Analytical Applications in close coordination with SRLDC. Issues, if any, needed to be brought to the attention of PGCIL (Smart Grid) & IIT B.

The following were noted in the meeting: SR II informed that SAVT of TN had been completed. M/s OSI has been given one and a half month time to sort out all the issues and

PGCIL requested all the LDCs to coordinate and ensure completion of the works. SR I expressed concern over the non-resuming of SAVT at APSLDC citing different

reasons and sought cooperation from APSLDC. APSLDC stated that all the queries were not being replied by the vendor. SR I/forum requested APSLDC to sort out the issues and ensure timely completion

of SAVT.

MS, SRPC stated that mutual coordination is very much required to solve the issues and it is not appreciable to withhold the works because of lack of proper communication.

3.16 Status of Implementation of the revised FGD Installation/ESP Up-gradation Plan

CEA/MoP is seeking updated information in respect of implementation of revised FGD installation/ESP Up-gradation Plan and the regular updated may kindly be furnished.

CEA vide letter dated 06.11.2019 had requested to submit the Phasing Plan for units commissioned after 31.03.2019. In SR TSTRANSCO/TSGENCO is requested to furnish the plan w.r.t.Kothagudam Stage VII Unit 7(800 MW) – COD -28.12.2018.

In the 161st Meeting TSGENCO informed that they will be furnishing the information to CEA with a copy to SRPC.


SRPC had suggested to compile the information regarding Bhadadri(Manuguru) TPS also whose COD is expected shortly.

TSSLDC/TSGENCO to furnish the information at the earliest to CEA with a copy to SRPC.

CEA vide letter dated 27.11.2019(Annexure-3N) enclosing MoP letter dated 01.11.2019 had enclosed the consolidated information received from various developers for their respective FGD implementation phasing plan.

It had been requested to all concerned that the missing information if any (regarding upcoming projects/units) may be furnished to CEA with a copy to SRPC. Also the furnished information in the Annexure may also be scrutinized and discrepancies, if any, may be brought to notice.

In the Meeting it was noted that a Meeting is scheduled on 11.12.2019.

Subsequently it was noted that a Special Meeting was convened on 11.12.2019 at SRPC Bengaluru.

Minutes has been issued on 12.12.2019. All concerned generators to revert back by 20.12.2019 with comments, if any.

3.17 Requirement of fresh CEA clearance for restoration of transmission elements, which were under breakdown for more than 6 months

Central Electricity Authority (Measures relating to Safety and Electric Supply) Amendment Regulations, 2015 clause no 43 is reproduced below:

“Every electrical installation of voltage above the notified voltage and all the apparatus of the generating stations and above the capacity specified under regulation 32, shall be required to be inspected and tested by the Electrical Inspector before commencement of supply or recommencement after shutdown for six months and above for ensuring observance of safety measures specified under these regulations: Provided that the owner or supplier or consumer has the option to get his installation inspected and tested by the Electrical Inspector of the Appropriate Government.”

In the Meeting, MS, SRPC stated that this is an important regulation in view of safety requirements and needs to be followed by State utilities, Private utilities and Central sector utilities in the field of power sector.

All the entities are requested to take note of the same and take up with the concerned wings.

3.18 Commissioning of Edamon - Kochi line

In the Meeting, SR-II informed that Circuit II is expected to be commissioned by 20th December 2019.

Subsequently it was noted that Tirunelveli- Kochi Circuit II was charged and synchronized to grid on 14.12.2019 at 16:35 hours.

3.19 Shutdown of Kochi-Trichur


In the Meeting KSEBL informed that PGCIL had requested for an outage of 25 days for Kochi-Thrissur line to facilitate LILO/tapping arrangements of the line at 320kV HVDC substation/Thrissur. There were other shut downs(Madakkathara-Lower Periyar 220 kV line for 75 days- making LILO at Chalakkudi S/S-conversion of single ckt single voltage to multi ckt multi voltage is involved) planned and the shutdown of Kochi-Trichur could be taken up immediately.

SR II agreed for the same. The shutdown was approved w.e.f. 15.12.2019 to 05.01.2020.

Subsequently, KSEBL vide letter dated 17.12.2019(Annexure-3O) informed that due to the above shutdown, ATC reduction of 340MW is imposed for import to Kerala control area. This has severely affected the import capability of the State thereby unsettling the load generation balance. As annual overhauling of number of hydel machines is scheduled from first week of January 2020, the State will depend on import of power to meet the shortages. KSEBL requested PGCIL, SR II to compress the shutdown period from 15thto 31stDecember 2019 so that the ATC is restored back from 1st January, 2020. Balance work, if any, can be concurred after improvement in the internal generation availability.

3.20 Disaster Management Group

Plant Level Emergency Group (EMG) formation confirmation to be communicated by GENCOs/generators/RE generators.

It was noted that Plant Level Nominations had been received from the following:

NTECL, Vallur NPCIL

NTPL Tuticorin TPS & NCTPS (TANGEDCO

HNPCL NTPC(All NTPC Stations including Kayamkulam).

UPCL CEPL

KSEBL RTPP and VTPS(APGENCO)

KPCL

In the Meeting the following were reiterated:

The first Meeting of RDMG for power sector was convened on 23.10.2019 at SRPC Bengaluru. Minutes of the Meting are available at SRPC website. SRPC vide letter dated 31.10.2019 had communicated certain issues to CEA which were to be put up to CDMG as per deliberations in the Meeting.

MoP had convened a meeting regarding manual of electrical infrastructure for natural disaster related to SRPC on 20.08.2019. There are few actionable points which need to be complied. SRPC vide letter dated 30.09.2019 had communicated in this regard to concerned entities. The following information were requested to furnish:

I. Nodal Officers from DISCOMs / TRANSCOs


II. Central Basic Pool material III. Need for communication equipment which may be maintained as

centralized spares IV. Electrical infrastructure recovery Plan V. Insurance/Funding

KPTCL vide letter dated 25.11.2019 (Annexure-3P) had furnished the details as required to be furnished as per MOM of the MoP Meeting held on 20.08.2019.

All the other concerned are requested to take action as per the minute of the meetings held on 20.08.2019.

Disaster Management plan needed to be / updated by all the concerned entities keeping in view the CDMP for power sector released by CEA / MoP and other guidelines etc. The same would be submitted to RDMG.

3.21 Simhadri /Ramagundam Islanding scheme

In the 161st OCC Meeting, APTRANSCO had informed that the scheme for Simhadri islanding had been put up to Director for approval. SRLDC had informed that Ramagundam islanding Scheme would be reviewed considering LI Pumps.

In the Meeting the following were noted:

Simhadri Islanding: APSLDC informed that they have submitted the updated scheme. SRLDC informed that they have submitted the base case which is not sufficient for analysis and requested APTRANSCO to furnish the list of the lines being opened and the list of generators(IC/generation considered) for formation of the island. SRLDC/SRPC would review the same.

Ramagundam Islanding: SRLDC informed that they have initiated the job, but in the island around 6990 MW LI scheme generation is involved and there is no clarity regarding the actual generation and connectivity. Existing scheme may not work. It was agreed that TS(study team & SLDC) SRLDC & SRPC would discuss the Ramagundam islanding Scheme in a separate meeting in the first week of January 2020. Meeting would be called by SRLDC.

3.22 Energy Scheduled inside the region and outside the region from REs

CE(RPM) division, CEA vide letter dated 03.06.2019 had requested for the details - "Energy Scheduled inside the region and outside the region from RE generating station which has been given connectivity & LTA on Green Energy Corridors (both Central & State)".

WPDs/SPDs connected to Sub stations under Green Energy Corridor along with Installed Capacity (MW) details & corresponding schedules and actuals (from April onwards) needed to be submitted.

No information had been received from any of the entities (KSEBL had informed that at present they don’t have any WPD/SPD installed under GEC).


In the Meeting, KPTCL informed that they have written to Planning and RE wing requesting them to furnish the details urgently vide letter dated 19.12.2019(Annexure-3Q).

TSTRANSCO confirmed that there is no WPDs/SPDs under GEC Corridor.

APTRANSCO informed that they have taken up with planning wing.

All the concerned entities to furnish the information at the earliest.

3.23 Technical Specifications of Interface Meters

The matter regarding the finalization of technical specifications required for the Interface Energy Meters (IEM/SEM with AMR, configurable recording intervals etc.) was deliberated in various meetings.

It was noted that PGCIL needed to take action in compliance of SRPC decision (not to link with other issues like common specifications for all the regions etc).

In the 160thOCC Meeting, it was agreed that parallely Pilot SEMs could be installed to assess the performance. The final specifications for SEMs under AMR could be prepared but frozen after amendment of CEA Metering Regulations is notified.

In the 161st OCC Meeting SR-II informed that they were in touch with SRLDC to finalize the specifications at SRLDC end.

In the meeting, Senior GM, SR II informed that they have visited CDAC and had requested CDAC to give budgetary offer. He suggested that testing of meters may be started, by the time CEA may also notify the specifications.

SE(O), SRPC desired to know the status of Data center (Processing at SRLDC control center). He recalled that the requirement of AMR were raised by states and arose because of sign change violations. Even though that provision had been relaxed now, it will be implemented again from 01.04.2019. States also needed to take up with PGCIL in this regard. PGCIL was entrusted to freeze the specifications and needed to come up with proposal/cost estimate to SRPC. SRPC may take the decision.

CE, KSEBL recalled that the issue had been discussed in various forums of SRPC and SRPC also had approved for the implementation of the same by PGCIL. He requested PGCIL to give a road map of the implementation of the project.

Conclusionin the Meeting: SR II assured that technical specifications (including at SRLDC control Centre) would

be finalized within one month. The project may be completed in one year.

All the states suggested PGCIL to take necessary steps to comply with SRPC decision.

3.24 Periodical Audit and Vulnerability Assessment & Penetration Testing (VAPT) of Infrastructure

CISO MoP vide letter dated 31.01.2019, 20.02.2019, 22.04.2019 and 29.05.2019 had requested all stake holders to carry out Cyber Security Audit and VAPT of ICT Infrastructure, website, web application etc in defined intervals by CERT-IN


empaneled cyber security audit agencies to avoid vulnerability and report to CISO MoP along with the key findings of the audit. The above details may kindly be sent to [email protected] with a copy to [email protected].

SRPC vide letter dated 31.10.2019 had requested CE(IT) & CISO, MoP to arrange presentation from officers of CERT-in/NCIIPC in OCC Meeting to give exposure on the procedure for VAPT and ICT Cyber Security Audit.

The following entities had carried out the Cyber Security Audit during the year 2019-20:

Entity Date Entity Date

APTRANSCO – VA Audit of assets

13.05.2019 TSTRANSCO – VA Audit

08/09.05.2019

NTECL– IT Audit 18-21.06.2019 PGCIL – GIGW Certification of website

14.01.2019 – Valid till 13.01.2022

SRLDC Main SRLDC SCADA

25.02.2019 & 27.02.2019 Next schedule is Feb/March 2020

SRLDC Backup SRLDC SCADA

27.02.2019 & 28.02.2019 Next schedule is Feb/March 2020


KPTCL informed that tenders for third party auditing of Control Centers of SLDCs would be opened on 18.12.2019.

KSEBL informed that the WO for Cyber Security Audit for Control Centre would be completed by 15.01.2020.

TSTRANSCO informed that C-DAC was yet to take up Security Audit of TSTRANSCO website.

CERT certified agencies needed to be approached for the audit.

SRPC pointed out that as per CERC Regulations Cyber Security Audit was to be carried out for the year 2019-20. All the concerned entities needed to take note and communicate the dates and details in this regard to SRPC.

MS, SRPC emphasized that vulnerability from internal sources/insider also needed to be taken care other than external sources.

3.25 Data requested by CEA- Optimal Generation capacity Mix for the year 2029-30

CEA had communicated that a draft report on Optimal Generation Capacity Mix for the year 2029-30, which was on public domain for comments of stakeholders. One of the comment received was regarding change in Load pattern (8760 hours) due the shift of agricultural load from peak time (usually night time to afternoon time when solar is available) by many states. In this connection, it was required to analyze the


impact of shifting of Agricultural load and its impact on the All India hourly demand patter in recent time.

To analyze the impact the following data is required at stage/regional level:

1. Hourly regional load data (in MW) of 8760 hours for the last 3 years. 2. Year-wise, state-wise hourly agricultural load data (in MW) of 8760 hours for

the last 3 years for the states which have witnessed the shifting of Agricultural electrical load from peak to off peak hours over the last few years.


Hourly regional load data (in MW) of 8760 hours for the last 3 years-SRLDC had furnished SR Demand. Only AP had furnished the details among the states.

Year-wise, state-wise hourly agricultural load data (in MW) of 8760 hours for the last 3 years for the states which have witnessed the shifting of Agricultural electrical load from peak to off peak hours over the last few years.- All the states to furnish.

APTRANSCO informed that they have received data from APEPDCL and data from APSPDCL is awaited. After receiving data from APSPDCL consolidated information would be furnished.

KPTCL informed that they would furnish the information within 15 days(by December end)

TANTRANSCO informed that they would furnish the information shortly.

3.26 MoP Requirement: Updation of existing transmission system.

MoP had desired for information regarding existing transmission system (220 kV and above, AC and DC Voltage level) in the country as on 31.03.2019. CEA had already prepared the same and is available on the Link https://bit.ly/33qsbgN.

Vide letters dated 11.10.2019 CEA had requested States (STUs) and PGCIL to update/correct the information in the file available at the above link. It was also requested to furnish the State power map and single line diagram of transmission network (to be submitted by States) and regional level power map (to be submitted by Powergrid).

In the Meeting it was noted that SR I & SR II had furnished the details. States were requested to verify and update and upload the sought information. SLDs & Power map are to be submitted separately. CEA vide letter dated 29.11.2019 had sent reminder in this regard.

3.27 Relocation of SPS schemes

In the Meeting SR II informed that except KPTCL, at all other locations signals are through till load centers.

It was noted that two convertors were required for each link to extend the signal from control room to Kiosk in SAS stations. This requirement was noted during a visit to Hassan Station(SAS sation). States recommended that the cost of the


convertors and associated cable etc could be booked in the project cost.SR II informed that they will procure the converters shortly and they have approached manufactures.

KPTCL to take up with PGCIL for the modifications at Kolar.

The following activities to be carried out:

Carryout the pending works (refer Annexure No.V of 77 PCSC MOM). Carryout the mapping of the feeders in coordination with SRLDC. Furnish the revised list of feeders along with load reliefs under various SPS.

All states to communicate the compliance report in this regard to SRPC / SRLDC.

The mock drills in coordination with PGCIL and SRLDC would be carried out after all SPSs schemes are put in place.

3.28 Reliability of SPS Schemes

In compliance of Commission’s Order dated 26th March 2018 in Petition No. 09/SM/2015, the list of SPS in SR had been communicated to all concerned. SRLDC was to furnish the details of ISTS SPSs and SLDCs for other intra state SPSs. This information is to be submitted along with OCC on monthly basis.

SRLDC vide letter dated 09.12.2019 (Annexure-3R) had furnished the SPS operation during November 2019. It was noted that SPS of Talcher- Kolar operated on 05.11.2019 at 10:55 hours. Total load relief was 948 MW –as follows:

TN – 208(desired 395), KAR-600(desired 250), AP-140(desired- 230)


APTRANSCO informed that Madanapalli load relief was wired at 220 kV APTRANSCO SS (from earlier at 110 kV feeders).

APTRANSCO informed that RE injection feeder segregation would take 3 months. There were no radial feeders available in Cuddapah region.

It was noted that APTRANSCO can identify the radial feeders anywhere in the state.

SRLDC would come out with details (specified documentation) on SPS for Raigarh – Pugalur HVDC bipole link.

KPTCL was again requested to analyze the reason for relief being realized.

3.29 Weather forecast by IMD

SRLDC had informed that IMD had offered that if states provide required space for installing the weather monitoring equipment at substations they will provide weather forecast information location wise to SLDCs also. When formal proposal from IMD is received, it will be put up to OCC for further direction. (SRLDC to coordinate). In the Meeting SRLDC was again requested to revert back with formal proposal

after discussion with IMD.


3.30 Declaration of “Peak” and “Off-Peak” Hours in a month and high and low demand seasons

As per clause 42(3) CERC (Terms and Conditions of Tariff) Regulations, 2019, the hours of Peak and Off-Peak periods during a day shall be declared by the concerned RLDC at least a week in advance.

In the 161st OCC Meeting SRLDC had projected the procedure and had explained the computation. SRLDC was requested to come out with the sample computations for computing Peak and Off-Peak hours during wind, non-wind seasons etc. The results may be on the total demand and on total demand – RE to have more comprehensive understandings of the procedure.

In the Meeting, SRLDC presented the analysis considering the data from November 2018 to October 2019. It was observed that when net demand is considered peak hours are coming at 08: 00 hours to 09:30 hours and in evening 18:00 hours to 19:00 hours and when peak demand is considered peak hours are coming at day hours(solar hours).

TS, KAR & KER agreed for (total demand – RE). TN and AP stated that they would revert back.

SRPC/SRLDC also suggested that peak hours could be declared on net demand which will capture the need for thermal power.

SRLDC was suggested to share the analysis to all the concerned. States/Generators were requested to revert back on the analysis. The peak hours and off peak hours may be frozen by February 2020. As per Regulation this can be reviewed weekly also.

3.31 Request for additional assistance to Yerandahalli by KPTCL

It was noted that additional support was extended from Hosur S/s after implementing the SPS from 25.10.2019. TANTRANSCO vide letter dated 07.11.2019 had communicated regarding frequent tripping of SPS since KPTCL was drawing more than 140 MW power which was over loading 230 kV Hosur PG- Hosur D/C line enabling the SPS operation.

161st OCC conclusion: KPTCL would restrict the drawals as agreed in the special meeting (held

through VC on 03.09.2019)

KAR SLDC would appraise the Management and communicate to the field and BESCOM to restrict the loads.

KAR SLDC would map the feeder loadings of 230 kV Hosur (PG)-Hosur (TN) lines and create an alarm to take preventive action to avoid triggering of SPS.

KPTCL would furnish their proposal of enhanced request considering the conductor rating, reconfiguration etc to TANTRANSCO for consideration. TANTRANSCO would revert back on the proposal of KPTCL.


KAR SLDC had informed that two officials have been deputed to TANTRANSCO Hosur SS for effective load management in Karnataka system.

KPTCL had informed that they are taking all steps to ensure revival of the system by 10.01.2020 as requested by TANTRANSCO.

In the Meeting the shut down on Hosur-Yerandanahalli line was agreed from 12.12.2019 to 21.12.2019 for reconfiguration works at Yerandanahalli.

The 220KV Somanahally-Yerandanahally line LC work in Mylasandra project has been availed on 27.10.19 in the view of conversion of existing 220KV S/C line between Mylasandra SS to Yerandanahally SS for the period of four months.

During the line clear period additional feed of 120 MW was fed from Hosur SS towards Yerandanahally SS.

In this scenario with the additional load assistance from Hosur SS, the LC work has been completed and charged on 09.12.2019(letter dated 09.12.2019 at Annexure-3S) and from then Yerandanahally is being fed from Somanahallyby about 170-180MW and from Hosur by about 50-60MW in regular manner.

The shut down on Hosur-Yerandanahalli line was agreed from 12.12.2019 to 21.12.2019 for reconfiguration works at Yerandanahalli to take up tower erection, stringing and dismantling works at Yerandahalli.

After SLDC concurrence all the line work has been completed between Mylasandra to Yerandanahally SS and further no additional load feed assistance is required from Hosur SS in the view of line work in Mylasandra scope of project.

3.32 NPCIL Units availability during peak demand period

161st OCC conclusion KKNPP informed that unit-II would be taken out from 09.12.2019 to 11.03.2020

and unit-I would be taken out from 22.03.2020 (75 days till 04.06.2020). The revival of unit-II would be monitored and accordingly part loading of unit-I, if required, would be considered from February 2020.

All constituent states recommended the suggestion of TANTRANSCO of part loading of KKNPP unit-I from November itself.

KKNPP informed that they would put the request of TANTRANSCO/other beneficiaries to the management and revert back.

KKNPP vide letter dated 03.12.2019(Annexure-3T) had furnished the over hauling programme of KKNPP Units. Power generation from KKNPP Unit I had been reduced to 600 MWe for taking up some M/W(was operating at 1000 MWe till 31.11.2019). Generation would be normalized on 03.12.2019. Unit -I generation will be restricted to 900 MWe in the month of December 2019(based on TANTRANSCO’s request) and further review will be taken based on the progress of Unit II S/D works scheduled from 15.12.2019. It was informed that compensation to KKNPP for the reduced power operation will be dealt separately.



KKNPP informed that unit-II would be taken out from 15.12.2019 to 17.03.2020 and unit-I would be taken out from first week of April 2020 for 75 days.

KKNPP informed that Unit I would be generating 900 MW based on the request of beneficiary(ies). He informed that they are in receipt of a letter from Chief Engineer, APTRANSCO in this regard and part load compensation issues would be taken up separately.

3.33 Scheduling Issues of Pavagada Solar Park

In the Special Meeting held on 31.10.2019 w.r.t scheduling of Pavagada Solar Park, it was decided to start actual scheduling & accounting of Solar Park from 04.11.2019 for the SPDs connected to S/Ss 3 & 4. SRPC vide letter dated 14.11.2019 had requested SRLDC to furnish the schedules of these SPDs for the week starting from 04.11.2019.

SRLDC vide letter dated 18.11.2019(Annexure-3U) had informed that the details in SRPC letter and details given by KSPDCL vide letter dated 06.11.2019 are not matching and so scheduling and subsequent providing of meter data to SRPC could not be completed by SRLDC from 04.11.2019. SRLDC suggested to convene a Meeting in this regard.

SRPC vide letter dated 25.11.2019(Annexure-3V) had requested SRLDC to furnish the following information and concluded that a Meeting as suggested by SRLDC may be convened after receiving these information from SRLDC

Views of NLDC on KSPDCL letter dated 17.10.2019(requesting SRLDC to waive registration charges)

SRLDCs approach on operationalized LTA vis-vis SPDs under COD of Pavagada Solar Park

In the Meeting, it was noted that a Meeting was held on 05.12.2019 at SRPC Bangalore. It was agreed that scheduling and accounting of the SPDs by SRLDC/SRPC which are part of operationalized LTA (1000 MW) would commence from 00:00 hours of 30.12.2019. Balance 1050 MW would be scheduled by SRLDC once the LTA is operationalized by CTU. It was agreed that a review Meeting would be held on 20.12.2019.

3.34 High Loading of Hiriyur- Nelamangala

In the Meeting, SR II informed that 400 kV Hiriyur-Mysore line would be commissioned by March 2020 (Original schedule – December 2019). They are trying to complete the works by January 2020.

OCC requested PGCIL to complete the works at the earliest as LTA operationalization of Pavagada SPDs was linked to commissioning of these lines. PGCIL needs to take this issue seriously since SPDCs scheduling by SRLDC will be held up.


3.35 High Voltage in Karnataka Control Area

SRLDC in its agenda for 161st OCC Meeting had expressed concern regarding the Critical Grid Operation in Karnataka control area due to over voltages. Conclusion in the 161st OCC Meeting KPTCL had informed that the issue has already been referred to RT wing.

SRPC had suggested KPTCL to check the overvoltage grading set points also.

KPTCL needed to submit action taken report in this regard.

The following were noted in the Meeting

There was no update by KAR SLDC.

3.36 Delay in revival of Nelamangala-Dodaballapur line

In the Meeting, KPTCL informed that Nelamanagala-Dodaballapur 220 kV D/C line was under shutdown(taken by PGCIL-approved for two days for 8th& 9th December 2019). But the lines were not revived in scheduled time. There was interruption in 220 kV system and many lines tripped. Hoody – BIL line survived which was feeding International Airport, otherwise it could have been a very serious issue.

PGCIL informed that the works were delayed due to ROW issues and they had requested KPTCL for extension of LC for one day.

KPTCL stated that the request came by night 9 O’clock only. PGCIL need to assess the requirement of shut down period before taking approval of elements and any delay in revival need to be informed well in advance.

SRPC opined that this issue needed to be taken seriously since there was a chance for interruption of Airport supply and requested PGCIL to avoid such situations in future.

3.37 Deviation in drawals by states

SRLDC vide letters dated 15.11.2019(Annexure-3W had expressed concern regarding deviation in drawals by AP, KAR, TS and TN. These states were requested to take action in real time on the messages issued by SRLDC and also furnish reply to SRLDC letters issued subsequently.


There were sustained over drawals and under drawals by beneficiaries.

SRLDC stated that the violation messages were issued accordingly. SRLDC informed that they will be forced to go for physical regulations if states are not keeping their drawals in limits.

Entities were to take action in real time on the messages issued by SRLDC and also furnish reply to SRLDC letters issued subsequently.

3.38 Automatic Generation Control (AGC) implementation in India


CERC in its Order dated 28.08.2019 had stated, ‘ In the interest of reliable and safe grid operation, the Commission directs that all the ISGS stations whose tariff is determined or adopted by CERC shall be AGC-enabled and the ancillary services including secondary control through AGC be implemented’.

As per CERC Order dated 28.08.2019 all ISG stations whose Tariff is determined or adopted by CERC should be AGC-enabled before 28th February 2020.

NLDC vide communication dated 17.09.2019 had furnished the minimum requirement for AGC connecting equipment at Power plants. List of power plants identified for monitoring by NLDC was also enclosed.

A Meeting was held on 03.10.2019 at NLDC to discuss on the requirements for AGC to be implemented at generator ends by the generators and activities to be undertaken by them for speedy implementation of AGC. The minutes are available at NLDC website. All concerned were requested to go through the minutes and initiate the actions accordingly.

A Meeting in regard to communication availability from NLDC/ RLDCs to the nearest wide band node/ switchyard for the generating stations under AGC as per CERC Order 319/RC/2018 was held on 13.11.2019 at SRPC Bengaluru. The minutes of the meeting is available at SRPC website.

The following were noted in the Meeting: PGCIL, SR II informed that communication ports are available at all the locations

and there is a requirement of optical cards/optical fiber in some locations. The final requirement along with estimate will be finalized shortly.

SR II was requested to come up with the detailed list of requirement with estimated cost. The same was to be put up to TCC/SRPC for approval.

SR II agreed that they will submit the final estimate by end of December 2019.

3.39 Implementation of revised AUFLS settings in SR(SRLDC Agenda-1(i))

In the Meeting all states agreed for increase the AUFLS settings by 0.2 Hz viz. 49.4, 49.2, 49.0 & 48.8 Hz. after 9th NPC minutes are issued.

3.40 Shutdown request of NTPL-Tuticorin D/C line

Conclusion in the 161st OCC Meeting NTPL requested TANTRANSCO to restore the 230 kV connectivity to NTPL

switchyard (230 kV NTPL –TTPS & 230 kV NTPL-TTN Auto).

POWERGRID had informed that one ERS is ready to charge (8 hours for jumpering to ERS) and for the other ERS works had already been initiated.

TANTRANSCO vide letter dated 31.10.2019 had raised some compensation issues during the shutdown.

SR-II, PGCIL informed that the matter had been referred to the management. The same would be put up to SRPC Meeting.


It was noted that the calculation projected in TN letter may be relooked. Backing down of Tuticorin units was not envisaged in the revised proposal.

SRPC had suggested that compensation being a bilateral issue, it may be solved amicably through discussion in top level management.

It was noted that the compensation issues should not be linked with the shutdown approvals in OCC. OCC was a technical forum where issues of ATC curtailment, line loadings, injection restrictions, load generation balance, precaution during shutdown etc are discussed. Compensation issues, if any, could be taken up to TCC/SRPC through commercial committee meetings.

Subsequently it was noted that the issue of 230 kV connectivity of NTPL was discussed in the Joint Study Committee Meetings held on 21stand 22nd November 2019 at New Delhi.

In the Meeting SR II informed that NTPL confirmation is awaited for availing the outage.One ERS is ready and other ERS will be ready shortly.

SE(O), SRPC suggested that PGCIL may furnish an official request to SRLDC/SRPC for shut down whenever ERS is ready with specific dates, timings etc. NTPL concurrence to be sought accordingly.

230 kV connectivity of NTPL was discussed in the Joint Study Committee Meetings held on 21st and 22nd November 2019 at New Delhi. In the minutes the following had been noted:

Upon examination of the minutes of the 24th meeting of SCPSPSR, it was found that following transmission system had been agreed as the evacuation system for Tuticorin TPS JV (2x500 MW): i) Tuticorin JV TPS – Madurai 400 kV D/c quad ii) 2x315 MVA 400/220 kV ICT at Tuticorin TPS JV iii) LILO of 2 nos. of 230 kV circuits at Tuticorin TPS JV

Accordingly, the referred 2 nos. of 230 kV circuits at Tuticorin TPS JV is a part of ATS.

TANTRANSCO stated that the referred 230 kV lines cannot be utilized for the evacuation of power from Tuticorin JV as the same leads to congestion in the downstream network.

It was decided that the referred 230 kV lines may be by-passed through suitable arrangement under normal operation to avoid congestion in downstream networks and the same may be utilized for drawl of start-up power whenever required.

Further the proposal shall be put-up in the upcoming SRPC-TP for approval of the constituents.

Subsequently Meeting of first SRPC-TP was convened on 16.12.2019 at Hyderabad. Minutes of the Meeting is awaited.


3.41 High Voltage at UPCL & Outage of UPCL ICT

The following were noted in the Meeting: KAR SLDC informed that 400 kV Hebbanahalli S/s (Yettinahole LIP) would be

handed over to KPTCL and was expected to be taken over by March 2020.

For reactor implementation, UPCL had earlier informed that KPTCL approval (drawing etc) was being undertaken. Electrical approval will be received only after KPTCL approval. KPTCL requested UPCL to write a reminder to PCKL and share the same with KPTCL so that KPTCL will also take up with PCKL.

For repair of ICT, UPCL had informed in the 161st OCC meeting that the ICT was expected to reach the site by end of December 2019 and the charging was expected by 15th January 2020.

Vide letter dated 07.11.2019(Annexure-3X) KPTCL had taken up with UPCL and expressed concern that with one ICT at UPCL yard UPCL is declaring DC for both the units. UPCL had been requested to restore the ICT at the earliest.

3.42 Scheduling of Solar parks

Ghani Solar Park : APTRANSCO had informed that the matter was under review. It was noted that one of the SPD had approached Hon’ble CERC in this regard.

APTRANSCO informed that they were taking with CERC in this regard.

3.43 Testing of Primary frequency response of generators as per IEGC clause 5.2(g)

SRLDC had informed that deviation of three agencies had been opened. There were some queries by the bidders which have been replied by NLDC. The price-bid will be opened by end of December 2019.

3.44 AGC at state Level- Pilot Project identification & Implementation

The following were noted in the Meeting: Andhra Pradesh (APGENCO: Krishnapattanam): M/s GE had submitted a

proposal for AGC at Krishnapatnam/APSLDC. Note has been put up to the management for budgetary approval.

Karnataka (KPCL: Sharavathy / Varahi):Sharavathy expected to be completed by end of January 2020. Varahi is expected by February 2020. Payments to M/s ABB has been released by M/s USAID. Final configuration would be taken up.

Kerala (KSEBL: Kuttiadi&Idukki): M/s ABB had visited Kuttiadi SS on 15.11.2019 and a Meeting was also held in this regard. On 16.12.2019 M/s ABB was scheduled to visit SLDC. Specifications would be finalized in next two to three Meetings.

Tamil Nadu (TANGEDCO: North Chennai Stage-II and MTPS Stage II): TANGEDCO/TANTRANSCO had informed that the administrative approval was yet to be received and technical specifications are under preparation jointly by TANTRANSCO and TANGEDCO.


Telangana (TSGENCO: Kothagudem E): DPR prepared and waiting for budgetary offer. Dummy protocol testing from Kothagudem to SLDC was under progress.

SRLDC had informed that NP Kunta AGC was targeted to be commissioned by February 2020. The proposal would be discussed with APSERC/APDISCOMs.

3.45 Issues w.r.t KGS

There was no representation from Kaiga GS which was noted with concern.

The following were noted in the 161st Meeting: SEM related issues had been taken up with SR-II vide letter dated 09.04.2019.

SR II had informed that estimate (cost +) had been furnished to KGS. KGS had informed that the matter was under consideration.

Regarding Sirsi-Guttur section of Kaiga–Sirsi KPTCL had informed that they have replaced 20 numbers of tension strings.

Further replacement of 15 numbers and 22 numbers of insulator strings was planned, for Line I estimated cost is around 1.13 Crores and for line II it is 2.08 Crores.

Further activities are not carried out because of rains. Kaiga-Narendra I &II PLCC Channel Non-Availability

KGS vide E-mail dated 06.11.2019 had informed that on 05.11.2019 it is observed that Kaiga-Narendra Line I & II Channel I is in alarm condition. Narendra S/s also confirmed that the same channel is in alarm condition at Narendra end also.

SR II informed that channel II was rectified. Channel I was to be rectified by Kaiga GS(in coordination with KPTCL)

3.46 Hoody Reactor status

In the Meeting, KPTCL informed that Hoody reactor would be commissioned by end of 15th January 2020.

SRLDC informed that Nelamangala Bus reactor (commissioned on 19.10.2019) data is not reporting. KPTCL agreed to look into the same.

3.47 URS availability of other regions

It was noted that URS availability of WR was not visible after the LC/PS mechanism. SRLDC stated that they are working on it.

3.48 Rectification of OF cable between EDC to HAL

In the Meeting KAR SLDC had informed that EDC to HAL link will be rectified by end of December 2019.

3.49 REMC facility installed at SRLDC

In the 161st Meeting SRLDC informed that SAVT (1000 hrs) test had been completed. The list of pending works was being compiled.

3.50 REMC Project in SR SLDCs



KAR SLDC: SAVT completed by 25.09.2019. Forecast Software under evaluation. AP SLDC: SAT over. SAVT stopped on 13.10.2019 due to some issues. M/s OSI was

working on it. SAVT was scheduled to start from10.12.2019.(Communication/mail dated 11.12.2019 in this regard at Annexure-3Y)

TN SLDC: SAVT completed. All the entities (except TANTRANSCO) were requested to furnish the balance RE

stations still to be integrated in REMC. The upcoming requirement for next two years may also be furnished to PGCIL. If PGCIL is not taking up the integration of balance RE stations, then the states needed to integrate the balance RE stations into REMC at their own cost/initiative.

3.51 LI projects grid integration

In the 161st OCC Meeting, APTRANSCO had informed that a Meeting had been convened regarding the coordinated operation of LI pumps in which it was opined that there was no scope of reactive control through LI pumps. Further studies needed to be carried out.

There was no updates in the Meeting.

3.52 Andhra Pradesh: Coal issues

APGENCO vide letter dated 11.11.2019(Annexure-3Z) had communicated to Ministry of Coal, Mines and Parliamentary Affairs regarding the coal issues faced by APGENCO .

APGENCO had entered into a MoU with MCL for supply of 3.60 million tonnes of raw coal through road mode Washery circuit. The transportation of raw coal from mines is being carried out by their Washery operator M/s. Spectrum Coal and Power Limited. APGENCO is facing severe constraints in lifting of raw coal allotted through road mode, mines from Balaram OCP, Hingula OCP &Bharatpur OCP

Considering that there is severe shortage of coal at APGENCO Thermal plants, APGENCO had requested Joint Secretary-CPD, MoC to kindly give necessary directions to MCL for not considering the referred quantities as deemed delivery and permit dispatch of the same in future as raw coal directly to APGENCO by all rail Route.

In the Meeting, APGENCO informed that vide letter dated 28.11.2019(Annexure-3AA)MCL had informed that allocation of coal for the month of December shall be restricted to trigger level against the Monthly Scheduled Quantity. Accordingly the railway program submitted by APGENCO for the month of December 2019 as per MSQ is endorsed by MCL by reducing the rakes as follows:

SI No Station MSQ Trigger Level

1 VTPS I, II & III 100 % 90 % of MSQ


2 VTPS IV 95 % 75 % of MSQ

3 RTPP-IV 95 % 75 of MSQ

APGENCO had requested MCL to supply MSQ without restricting to minimum commitment level. APGENCO had furnished the details of coal issues which is at Annexure-3AB

3.53 Grant of MTOA to M/s IL & FS Tamil Nadu Power Company Limited for transfer of 330 MW power to TANGEDCO

CTU-Planning vide letter dated 06.08.2019(Annexure-3AC) had intimated that MTOA of 300 MW was granted(from 01.12.2019 to 31.05.2020) with existing transmission system(IL & FS is connected to 400 kV Nagipatanam PS-inter connection of TANTRANSCO with ISTS system).

Subsequently CTU Planning vide letter dated 28.11.2019(Annexure-3AD) had informed that MTOA agreement had been signed between M/s Powergrid& M/s IL & FS on 05.09.2019.

3.54 Intimation for commissioning of 50.2 MW Wind Generator

Betam Wind Energy Private Limited vide letter dated 14.11.2019(Annexure-3AE) had intimated that 50.2 MW(SECI Tranche-III) Wind power project(Tuticorin District of Tamil Nadu) will be ready for commissioning on 21.11.2019. Evacuation of power from this project will be through Tuticorin PGCIL GIS PS(400/230 kV) at 230 kV level.

3.55 Communicating the written instructions to Solar/Wind Generators

SRLDC vide letter dated 06.08.2019 had issued directions provisioned under Section 29(1) of the EA in respect of RE scheduling/curtailment. Any curtailment along-with reason was to be made known to RE generator/SRLDC in writing and through SLDCs website.

All the SLDCs were requested to furnish the daily reports on RE curtailment to SRLDC/SRPC. The curtailment details needed to be uploaded on the website also.

3.56 TTC assessment considering temperature dependent rating of lines/terminal equipment

The information received from all the states had been forwarded to NLDC/NPC (CEA) for further needful action. SRLDC was requested to follow up with NLDC.

3.57 Communication Audit

All the concerned entities are requested to comply to audit observations. Readiness/preparedness for Audit to be ensured by the concerned State/PGCIL.

SRPC informed that the Communication Audit for 2019-20 in compliance to CERC Regulations would be carried out in April 2020 and all the utilities needed to maintain the data in the requisite format.


3.58 Flexibilization of Thermal Plants: Units identified by APGENCO

TSGENCO had informed that they have identified KTPS Stage II - Unit 11 (500 MW) for conducting pilot test for flexible operation.

APGENCO had informed that BHEL was to revert back on implementation/pilot tests of Rayalseema Unit I for flexible operation.

3.59 Ramp Rates, technical minimum & startup from hot/warm/cold

All ISGS stations were requested to give ramp of 0.67%/min in line with the SRPC decision.

All the SLDCs were requested to ensure ramps of at least 0.67%/min in line with the SRPC decision for the state generators.

All the entities were requested to take action in respect of ramp rates, technical minimum, start up from hot, warm and cold condition as discussed in the SRPC meeting (noted in the special meeting).

POSOCO had pointed out that enhancing of the ramp rates would result in further savings in the SCED optimization.

3.60 RE Generators for Reactive Compensation & High Voltage

All the states were again requested to kindly examine and ensure voltage based MVAR interchange for RE generators. The following were noted in the Meeting:

KPTCL- KERC had raised some queries. KEGC review panel had discussed the queries.

KSEBL: Public hearing was held on 29th October 2019 at Thiruvanthapuram. Public hearing was held at Kochialso(only w.r.t RE). Based on all the inputs from these hearings and comments received from various stake holders final GRIDCODE would be notified shortly.

TSTRANSCO: The charges are yet to be notified by TSERC. TSERC had started functioning.

3.61 Monitoring of scheme funded from PSDF

All the states/entities were requested to kindly furnish the updated status in a time bound manner.

A review meeting was convened on 25.11.2019 by NLDC/NPC at SRPC Bengaluru. Minutes of the Meeting is awaited.

Subsequently SRLDC vide letter dated 18.12.2019(Annexure-3AF) had requested all the entities to furnish the status of PSDF schemes which is to be furnished to MoP. A VC in this regard is convened on 26.12.2019.

3.62 VC Facility at SLDC

Puducherry had informed that VC facility will be commissioned by March 2020.


3.63 Certification of Inter-state and Intra-state lines in PoC

All SLDCs were requested to communicate the outage and availability computations for the applicable lines within one week after completion of month to SRLDC. SRLDC would communicate the details by 3rd week. SRPC would issue the certificate by month end.

SRPC had requested all states to furnish the availability calculations as a whole (single availability factor) for entire AC System.

3.64 PSS Tuning of generators

A Meeting to discuss the submitted reports and to discuss the status of schedule of PSS tuning/SRT was held on 14.11.2019. Minutes of the Meeting is available at SRPC website. All concerned are requested to take action as per the Minutes of the Meeting.

Non representation of NTPC, KSEBL, IL & FS, SEL, MEL, SEIL, LANCO, UPCL etc were noted with serious concern, Communication in this regard to the concerned is at Annexure -3AG

3.65 Compliance of CEA Regulations for Grid connectivity of Renewable Energy Sources

The following is the updated status on RE SCADA availability as noted in the 162nd Meeting of OCC:

State SCADA availability as on 30.11.2019 Mapped Vs I/C

Remarks

AP Wind: 4079/3992MW (98%) Solar: 3233/2970 MW (92%) Total: 7312/6962 MW (95%)

Pending SCADA availability was for RE connected distribution level and for which action had been taken for compliance.

TS Wind: 100.8/100.8 MW (100%) Solar: 3495/3475 MW (99%) Total: 3595/3575 MW (99%)

Action for balance SCADA availability at 33 kV and below was being followed up and notices had been issued.

KA Wind: 4795/4775 MW (99.6%) Solar: 6404/5851 MW (91%) Total: 11199/10626 MW (95%)

KE Wind: 70/27 MW (38%) Solar: 95/87 MW (92%) Total: 165/114 MW (69%)

TN Wind: 9196/8768 MW (95%) Solar: 3837/648 MW (17%) Total: 13032/9416 MW (72%)

SR Wind: 18241/17663 MW (97%) Solar: 17063/13030 MW (76%) Total: 35304/30692MW (87%)


3.66 High voltages in SR/Frequent switching of lines / Bus reactors/ MVAR interchange of generators

SRPC had analyzed the nodes of high voltage coupled with MVAR injection during July 2019 to November 2019 and the following was observed:

Nodes with MVAR injection during V > 103%

AP KAR TN TS

Chittoor Madhugiri Tirunelveli Maheshwaram

Sattenapalli Nelamangala Karaikudi Hyderabad

Vemagiri Raichur Alamathy Mehaboobnagar

Hindupur Guttur Pugalur Dichipally

Vijayawada Munirabad S V Chatram Warangal

Kurnool Hoody Kalavinthapattu Malkaram

Gazuwaka Gajwel

Khammam

Shankarpalli

All entities are requested to kindly take appropriate action.

3.67 Updates on newly commissioned /Upcoming Generating Stations

In the 157th OCC Meeting it was noted with concern that no timely information is furnished by entities regarding the upcoming generating stations. The information is being sought by higher bodies like CEA/MoP etc.

All the States and ISG Stations were requested to furnish the progress of works of upcoming generating stations with expected date of commissioning. It was also noted that commissioning of new units also to be intimated in time. Declaration of COD letter from SLDC was required to be submitted to CEA, Fuel Management Division for purpose of coal linkages etc.

3.68 Meeting to discuss the issue of delay in installation of bus reactors by NPCIL at Kaiga and Kudankulam NPP

PSPA-II division, CEA had convened a meeting on 22.11.2019 to discuss the following issues. Minutes of the Meeting are at Annexure-3AH.

The following were noted in the Minutes:

The KKNPP reactor is likely to be put back into service by March, 2020.

NPCIL representative informed that tender had been floated for the work. Bids have been received and are under evaluation. The work is likely to be awarded by March, 2020.


3.69 Criteria to categorize the Generating units/Transmission elements under prolonged outage

The following were agreed for categorization

Generating Units: Planned outage: After 5 days of scheduled revival date

: Forced outage: After 5 days of outage.

Transmission elements: Planned outage: After 2 days of scheduled revival date.

Forced outage: After 2 days of outage

SRLDC informed that the transmission elements would be listed out based on the IEGC Clause 5.2(e) as below:

“Any prolonged outage of power system elements of any User/CTU/STU, which is causing or likely to cause danger to the grid or sub-optimal operation of the grid, shall regularly be monitored by RLDC. RLDC shall report such outages to RPC. RPC shall finalize action plan and give instructions to restore such elements in a specified time period”

RTPS- Prolonged outage(Unit II & III) RSTPS vide letter dated 27.11.2019(Annexure-3AI) had furnished the details regarding the prolonged outage of RSTPS Unit II & III.

NCTPS Stage – I vide letter dated 02.12.2019(Annexure-3AJ) had furnished theb reason for prolonged outage of NCTPS Stage I.

3.70 United Capacity of Priyadarsini Jurala HEP

TSTRANSCO vide letter dated 28.11.2019(Annexure-3AK) had clarified(reply to CEA letter dated 06.11.2019) that total installed capacity of Priyadarsini Jurala HEP is 234 MW and there is a joint PPA between Telangana and Karnataka DISCOMs, accordingly the total energy is being scheduled in the ratio of 50:50 on mutual understanding basis.

The forum noted the above.

4. Outage Proposals/LGBR

Outages was discussed and processed through VC on 06.112.2019. Review on Annual Outage Planning for the year 2020-21

Annual Maintenance Schedules furnished by Generating Units have been analysed as per the guidelines finalized in the OCC Forums and Kukde Committee’s recommendation.

The suggestions / observations, had been communicated to all concerned vide letter dated 11.12.2019(Annexure-4A) and also posted in OCC Group(along with detailed Report of Analysis on the Maintenance Schedule in power point presentation (ppt)).


It is requested that these outages may kindly be reviewed and rescheduled wherever required. The revised schedule of maintenance may please be communicated to this office.

5. TTC/ATC computations All states were requested to furnish PSSE base case for April 2020.

SRLDC & SRPC had pointed out that the demand being furnished for POC, ATC and LGB should be in synch with each other. Different values should not be furnished for different requirements. Node wise data should be as per the demand which is likely to be met from various sources keeping in view MOD etc.

6. Availability and Requirement

Availability and requirement for the period from December 2019 to April 2020 is given at Annexure-4B.

7. REVIEW OF THE POWER SUPPLY POSITION

Grid Highlights

Frequency remained within IEGC range during November 2019 (49.90 - 50.05 Hz) for 73.39 % of time. Average frequency for the month was 50.01 Hz.

Frequency remained below 49.90 Hz for 4.06 % of time during November 2019. Frequency remained above 50.05 Hz for 22.55 % of time during November 2019. Andhra Pradesh, Telangana, Karnataka, Kerala & Tamil Nadu imported 307 MU,

604 MU, 277 MU,10 MU & 1054 MU respectively intra-regionally through bilateral exchanges.

Andhra Pradesh, Telangana, Karnataka & Tamil Nadu exported 981 MU, 17 MU, 280 MU & 976 MU respectively intra-regionally through bilateral exchanges.

Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil Nadu & Puducherry imported 299 MU, 287 MU, 115 MU, 42 MU & 388 MU respectively through Power Exchange.

Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil Nadu, TPCIL, IL & FS & SEIL P II exported 20 MU, 66 MU, 278 MU, 1.49 MU, 10 MU, 105 MU, 40 MU, 1.4 MU & 153 MU respectively through Power Exchange.

220 kV SS Ananthapuram S/S was commissioned on 08.11.2019 by APTRANSCO with augmented capacity of 1x160+2x100 MVA(Earlier 3x100 MVA)

At 400/220kV Janagaon SS with 2x500 (MVA) capacity (PTR no 2 & 3) was commissioned on 01.11.2019 & 13.11.2019 by TSTRANSCO.

220 kV lines(ckts I & III) of ckt kM 3 from Jagatyal-Nirmal(LILOs of RSS-Nirmal to 220 kV Jagatyal S/S) was commissioned on 20.11.2019 by TSTRANSCO.

220 kV lines(ckts IV & III) of ckt kM 3 from Jagatyal-Vemnur(LILOs of Memnur-Nirmal to 220 kV Jagatyal S/S) was commissioned on 20.11.2019 by TSTRANSCO.


8. High frequency

It was noted that the Regional Grid had operated above IEGC range i.e.50.05 Hz for 22.54 %of the time. It was also noted that the frequency on some of the days was higher for considerable duration of times. (Refer Table-IV of Appendix)

SRLDC informed that maximum frequency had touched 50.26 Hz at 22:01 hours of 26thNovember2019. (Graph at Annexure-8A).

SRLDC presented the underdrawal of states when frequency was above 50.05 Hz. (Annexure-8B). The maximum underdrawals touched by States during November 2019 also was presented. (Refer Table V of Appendix)

Constituents were advised to kindly avoid uneconomic operation at high frequencies. SRPC requested all the constituents that action needs be taken to adhere to the schedule since it had commercial/operational impacts even for underdrawal.

8.1Pump mode operation

It was noted that there was no consumption in pump mode at N’Sagar&Srisailam. Kadamparai consumption in pump mode was 53.355 MU during the month of November 2019.

9. Low Frequency

It was noted that the frequency of grid operation was at times lower than IEGC range. Grid had operated below IEGC range i.e. 49.90 Hz for 4.07%of time during the month (Refer Table-VI of Appendix).

SRLDC informed that minimum frequency touched 49.66 Hz at 06:21hrs on 18thNovember 2019. Drawals of Southern Regional states at that instance were also projected (Graph at Annexure-9A).

Overdrawal by SR constituents at frequency less than 49.90 Hz (Annexure-9B) was presented by SRLDC. The maximum over-drawals touched by States also was presented.(Refer Table VII of Appendix).

10. VOLTAGE PROFILE

10.1 Low voltage

In the meeting, it was noted that low voltage had been observed at few nodes in November 2019. It was observed that voltage profile had been improved compared to last month.

Details of Capacitors installed during November 2019 are at Annexure-10A. Details of the healthy/faulty capacitors to be furnished.

10.2 High Voltage


SRLDC informed that there werehigh voltages observed at number of 400kV / 765 kV nodes. (Refer Table VIII of Appendix)

10.2.1 Status review of GT Tap positions

GT tap Positions – GT taps yet to be changed as per recommendation (Refer Table-IX of Appendix)

10.2.2 Status review of Bus/Line Reactors, Line Reactors and STATCOM

Status of implementation of Bus / Line Reactors approved in the Standing Committee / SRPC by the SR constituents is furnished at Table X of Appendix.

In view of very high voltage at some nodes, it was emphasized that urgent action needs to be taken to commission reactors as per committed dates.

10.2.3 Reactive Power Planning

Status update on capacitor installation is given at Table XI of Appendix.

SRPC & SRLDC requested all the states to come up with updated information like till date commissioned, plan for new commissioning, quantum in working condition, action taken to rectify/replace faulty capacitors, etc.

10.2.4 MVAR interchange/Testing

MVAR interchange meeting was convened on 26.09.2018. Minutes of the Meeting are available at SRPC website. Necessary action as per minutes to be taken.

The following were planned w.r.t BSRP & MVAR testing:

TS: BSRP on 11.12.2019 at Kakatiya AP: BSRP on 20.12.2019 and MVAR testing on 19.12.2019 at Rayalseema KER: BSRP likely on 17.01.2020 at Kalamassery TN and KAR: would be finalized.

11. Network Protection/Security issues

11.1 U/F &df/dt Relays Schemes

Implementation of SRPC recommended quantum It was noted that all States had implemented AUFR and df/dt schemes fully.

In the Meeting, SRLDC presented the load relief realized as a percentage of AUFR quantum declared in the identified feeders during the month of November 2019 as follows: (Detailed Presentation is at Annexure-11A)

AP: 71 %, TS: 78%, KAR: 41%, KER: 69%, TN: 66%, Pudu: 89% &SR: 60%.

In the Meeting, KPTCL informed that they were looking into the relief issue which was around 42 %(as per SRLDC). AS per KPTCL RT wing the relief is around 62 % and the data had been forwarded to SRLDC.

SRLDC agreed to review the relief in this regard.


SRLDC informed that validated list of feeders had been shared in google spread sheet. Any change in details of feeders to be uploaded in google spread sheet with the date of updation.

11.2 SCADA mapping of feeders of AUFR &df/dt schemes Status update as per SRLDC after validation of all the States is as follows:

State SCADA mapped %

Status

AP 64 ATRANSCO informed that 132 RTUs have been procured and would be commissioned by October 2019(UFR and df/dt mapping and visibility would improve).

TS 77 Out of 29 RTUs 28 is commissioned. Pending 1 RTU will be commissioned by this month end. Mapping is to be carried out in coordination with SRLDC for some of the RTUs.(communication issues existing)

KAR 100

KER 100

TN 88 All the RTUs commissioned(28 RTUs ) Pudu 92 The points pertaining to the feeders identified for

UFR tripping in the new RTUs have already been mapped in the SCADA system and the same will be communicated to SRLDC for including in the list.

SR 94

12 Automatic Demand Side Management Scheme (Petition No. 250/MP/2012) & GSES (Petition No. 265/MP/2012)

It was noted that all states had implemented revised ADMS logic. (Alarm at 49.90 Hz and below for 10 minutes, Trip at 49.85 Hz, Min DSM limit for 15 Minutes)

There was no ADMS incidence during the month of November2019.

All states were requested to identify additional feeders which could be tripped through SCADA rotationally with load relief of (OD-Max dev limit). Any loads tripped under ADMS should be brought back only under the directions of SLDC keeping in view the frequency, overdrawal etc.

12.1 Grouping of loads (IEGC clause 5.4.2 (e))

As per IEGC, to maintain the frequency within stipulated band and also to ensure network security, the interruptible loads were to be arranged in four groups of loads, This was for the purpose of scheduled power cuts/load shedding, loads for unscheduled load shedding, loads to be shed through UF relays, df/dt relays and


loads to be shed under any SPS scheme. These loads are to be grouped in such a manner that there is no overlapping between different groups of loads.

This issue was noted for compliance by the concerned utilities.

12.2 LVRT Implementation

Hon’ble CERC had passed Order in respect of Petition No. 420/MP/2014 on 05.01.2016. Five Special Meetings were conducted at SRPC on 05.02.2016, 18.04.2016, 05.07.2016, 25.10.2017 and 23.04.2018 (Meeting minutes are available at SRPC website).

Quarterly reports of the SR constituents jointly validated by SRLDC/SRPC Secretariat are being communicated to Hon’ble CERC in regard to monitoring of the installation and performance of LVRT installed on existing WTGs as per the directives of Hon’ble CERC.

CEA had issued CEA (Technical Standards for connectivity to the Grid) (Amendment) Regulations, 2019 dated 06.02.2019 which are available at CEA website.

Therefore all the SLDCS were requested to furnish the LVRT status(33 kV & above) for the WTGs being commissioned from 06.08.2019.

13 Emergency Restoration System (ERS) The status was updated in the 35th TCC Meeting held on 11.07.2019 and is at Table IV.

14 SCADA AND COMMUNICATION

All entities were requested to bring any specific/recurring SCADA/Communication related issues to the notice of OCC forum.

All states were requested to furnish the SCADA mapping updates for the RE and at the pooling stations (as per the format of CEA) – the details to be communicated wherever pending.

15 Black Start Procedure

In case of postponement or non-conducting of mock drill exercise then the same must be intimated to SRLDC along with reasons.

Black Start Mock Drill

i) Details of Mock drills conducted in November2019 to be furnished.

ii) Mock drills scheduled for December 2019 and from January 2020 to June 2020 to be furnished.

iii) Point to point mock exercise for black start by all constituents. iv) TSTRANSCO had informed that TSGENCO was planning to procure DG set of

appropriate capacity for Jurala HEP.

16 RGMO/FGMO


16.1 RGMO response had been deliberated in various Special/OCC/TCC/SRPC meetings. Inadequate response was an area of serious concern and there was no noticeable improvement.


Inadequate response was needed to be taken up by SLDCs with respective SERCs in line with Hon’ble CERC Orders in respect of Petition No. 84/MP/2015 and 302/MP/2013.

Non-performance of generators under SRLDC control should be taken up by SRLDC with the respective generators.

It was noted that some of the generators were disabling RGMO without informing /concurrence from SLDC/SRLDC thus not complying with IEGC provisions.

SLDCs had been suggested to ensure that schedules are restricted to normative ex-bus generation. Generators had been suggested not to resort to VWO and maintain generation as per the coal quality/ system/machine parameters and keep margins for RGMO / FGMO with MI at all instances.

Need for testing of RGMO response at the field emerged since response was not meeting the requirements fully.

As per 5th Amendment to IEGC, gas stations above 50 MW Installed Capacity were also to come under RGMO/FGMO Operation w.e.f. 1st October 2017. Generators/SLDCs had been requested to take necessary action to comply with this Amendment.

FRC computations were also to be undertaken by the SLDCs in line with approved methodology of CERC.

All the generators had been requested by SRPC/TCC to improve their primary response which was becoming more significant with high RE ingress. SLDCs needed to sincerely peruse the performance of their generators within their Control Area and take up nonperformance with SERC. For Gas units (> 50 MW) RGMO compliance was required as per IEGC. The performance report of all the units was being communicated by SRLDC to CERC periodically.

16.2 Performance of RGMO is analyzed by SRLDC and presented in the Meeting. Summary for Southern Region (state-wise details are given in Annexure-16A) for the incident on 01.11.2019 is given in the Table below:

Incident: Generation loss of approximately 1644 MW (as per SCADA data) in Akal-Ramgarh generation (Rajasthan) complex occurred at 11:17 hours on 01.11.2019. Frequency has dropped from 50.02 to 49.90 Hz during the incident.

STATE HYDRO THERMAL TOTAL

Possible Actual Possible Actual Possible Actual %

AP 37.90 3.90 83.55 57.46 121.45 61.36 51%

TS 59.80 17.80 62.18 64.36 121.98 82.16 67%

KAR 59.80 17.80 45.55 9.40 105.35 27.20 26%


KER 20.70 9.00 0.00 0.00 20.70 9.00 43%

TN 0.00 0.00 63.40 20.00 63.40 20.00 32%

CGS 0.00 0.00 298.60 190.34 298.60 190.34 64%

SR 178.20 48.50 553.28 341.56 731.48 390.06 53%

AP: Response was comparatively better. Krishnapatnam response was partial. Rayalseema units didn’t respond. APSLDC informed that there is a mismatch in the data. APGENCO was requested to give the revised data. Subsequently APGENCO had furnished the revised response and the same had been incorporated by SRLDC.

TS:TSTRANSCO informed that response of Hydro was less since Srisailam and N’sagar didn’t response was less due to net head. Thermal all the running units had responded.

KAR: Both Hydro &Thermal had shown poor response. KAR SLDC informed that only Unit -3 & 8 of RTPS were in operation at Raichur TPS. Yeramarus was not in operation. Some data discrepancy was observed in the data. KPCL was requested to furnish the data to SRLDC.

KER: Only Kuttiyadi& LP Extn responded.

TN: Only NCTPS Stage II(Thermal) &Kunda II(Hydro) responded.

ISGS: Ramagudam(except Ramagundam Unit-VII)&Simhadri units responded. Kudgi units were out. NLCIL units not responded. NTECL units were out. Talcher data issue was there.

MPPs: CEPL one unit responded partially, other unit didn’t respond. SEIL: Partial response. IL & FS Units: Partial response.

After deliberations:

All concerned are requested to analyse and submit revised figures where ever mismatch is observed.

No response/partial response/reverse response etc to be taken up with concerned generators by SLDCs and revert back with the reasons.

16.3 Extension of RGMO status point to SLDC (Refer Table-XVI of Appendix).

16.4 KPTCL had convened a Meeting of the RGMO/FGMO, MVAR interchange, AGC and Ramp Rates on 13.11.2019 at SLDC, KPTCL in which UPCL & JSWL had also participated. Minutes of the Meeting issued vide letter dated 19.12.2019 is at Annexure-16B

17 Upcoming Generating Stations

Status update of Central sector and State Sector Upcoming generating stations is given at Table XIII of Appendix.

SRPC stated that declaration of COD letter from SLDC was required to be submitted to CEA, Fuel Management Division for purpose of coal linkages etc.


SRLDC stated that new ISTS connected units should come out with detailed metering schemes for various units commissioning schedule, at least one year prior to synchronization. The scheme needs to be discussed and finalized in the Commercial Sub Committee.

18 Wind/solar Generation

SRLDC presented the day-wise Wind Generation pattern in Andhra Pradesh, Karnataka & Tamil Nadu during the period 1st November 2019 to 30th November 2019.

Wind generation in Andhra Pradesh had varied between 17.57MU (28.11.2019) to 0.84 MU (06.11.2019). Wind generation in Karnataka had varied between 17.60MU (26.11.2019) to 2.4 MU (02.11.2019). Wind generation in Tamil Nadu had varied between 18.62MU (26.11.2019) to 2.4 MU (02.11.2019) (Annexure-18A).

SRLDC presented the day-wise Solar Generation pattern in Andhra Pradesh, Telangana, Karnataka& Tamil Nadu during the period 1st November 2019 to 30th

November2019. Solar generation in Andhra Pradesh had varied between 14.01MU (11.11.2019) to 6.48 MU (15.11.2019). Solar generation in Telangana had varied between 19.55MU (13.11.2019) to 10.22 MU (03.11.2019). Solar generation in Karnataka had varied between 45.20MU (25.11.2019) to 24.43 MU (01.11.2019). Solar generation in Tamil Nadu had varied between 14.05MU (27.11.2019) to 06.32 MU (30.11.2019). (Annexure-18B).

19 Vote of Thanks

Member Secretary, SRPC thanked all the participants for their valuable inputs during the deliberations in the Meeting.

20 Date & Venue of the next Meeting

The schedule for the next Meeting of OCC is as follows: Meeting : 163rd OCC of SRPC

Date : 09.01.2020 (Thursday)

Time : 10:00 Hours

Venue : SRPC, Bengaluru


Minutes of the 162nd Meeting of Operation Coordination Committee (OCC)

held at SRPC Bengaluru on 10.12.2019

1. Introduction

1.1 The 162nd Meeting of Operation Coordination Committee of SRPC was held on 10th

December 2019 at SRPC, Bengaluru. The list of participants is given at Annexure-

1A.

1.2 Shri A Balan, Member Secretary, SRPC welcomed all the participants to 162nd

OCC Meeting. He stated that last month there were many meetings/workshops

conducted to discuss various important issues as follows:

Technical Workshop on “Solar Power Forecasting” held at Bengaluru on

4th & 5th Nov. 2019 which was organized by NIWE & GIZ.

Result Dissemination workshop on Controlling Power Generation & Ancillary

Services from RE(Wind & Solar) generators organized by M/s GIZ. The final

draft report had been circulated among the states for comments. SRPC had

submitted their comments.

A Special Meeting was held on 07thNovember 2019 to discuss the

Accounting Methodology during diversion of RSTPS share of Goa through

WR.

Meeting on UNMS and ISTS communication system was convened on

11.11.2019 and minutes are available at SRPC website. The

recommendations/decisions would be put up in the forthcoming SRPC

Meeting for consideration.

Meeting on Communication availability from NLDC/RLDC to nearest

wideband node/switch yard for the generating station under AGC as per

CERC Order 319/RC/2018 dated 28.08.2019 was held on 13.11.2019.

7th PSS Meeting was held on 14.11.2019. Active participation of many

generators in the Meeting was appreciated.

A Special Meeting was held on 05.12.2019 to discuss the scheduling issues

of Pavagada Solar Park.

A special meeting of Commercial Subcommittee was held on 09.12.2019 to

discuss on availing of construction power to KKNPP Units 3, 4,5& 6 from

Units 1 & 2.

Joint Study Group Meetings of Transmission Planning were held on 21st

/22nd of November 2019 at New Delhi. Special Meetings to discuss delay in

commissioning of Kaiga and KKNPP reactors & delinking of 400kV RTPS-

BTPS-JSW- Guttur line at 400kV JSW SS were also held on 22nd November

2019 at CEA. MoMs of all the Meetings have been circulated by CEA.

Chairperson, CEA felt that operational issues may be handled at RPC level

itself.


9th NPC Meeting was held on 22.11.2019 at NRPC. Chairperson, SRPC and

Chairperson, TCC and MS, SRPC had attended the meeting. Many

important issues were discussed, minutes of the meeting is awaited.

PSDF review Meeting was held on 25.11.2019 at SRPC, Bengaluru which

was chaired by Member (GO & D), CEA. Minutes of the meeting is awaited.

He informed that CERC had extended the date for giving comments on Draft

CERC (Sharing of Inter-State Transmission Charges and Losses) Regulations,

2019 up to 31st December 2019. He requested all the entities to give their proper

feedback in advance so that it could be considered/incorporated in final

notification. Feedback after notifying the regulations may not be considered. SRPC

had already furnished comments from RPC side.

All Renewable Energy Generation Companies are requested to intimate the

commissioning of RE generation capacity to CEA whenever a new generator is

commissioned (Notice available on CEA website). He requested all concerned to

take up with RE generators and assure that the information as required is

communicated to RPM Division, CEA as per the format given.

He informed that 36th TCC and 37th SRPC Meetings would be held on 31st January

2020and 1st February 2020. TSTRANSCO/TSGENCO had kindly agreed to host

the Meetings at Hyderabad.

First Meeting of SRPC TP is scheduled on 16.12.2019 at Hyderabad.

He wished that this meeting will be helpful in taking decisions to help in secure grid

operation.

1.3 SE(O), SRPC took up the agenda for discussions.

2. Confirmation of the Minutes of the 161stMeeting of OCC of SRPC held on

10thNovember 2019 at SRPC, Bengaluru.

The Minutes of the 161st OCCM were confirmed.

3. MAJOR ISSUES

3.1 Status of URTDSM PMU shifting as agreed in the 36th SRPC Meeting

Shifting of PMUs(considering the requirements of SR Grid in view of large

integration of RE and commissioning of LI projects) had been discussed in the

156th/157th OCC Meetings and subsequently in 36th SRPC Meeting held on

12.07.2019. SRPC had approved that the charges towards shifting of PMU would be

booked by PGCIL under O&M or any other project.

It was noted that Under URTDSM project (commissioned in September 2018) 255

PMUs were installed in 65 S/Ss of SR. Total PMUs in SR II is 158 in which 142

PMUs were installed under URTDSM and the balance (16) PMUs were installed

under respective transmission projects. SR I have installed 113 PMUs.


In the 160th OCC Meeting, SR I & SR II had agreed to shift the PMUs from unutilized

stations to STATCOM locations (Hyderabad, Udumalpet and Trichy). Also it was

decided that SRLDC and SR II would discuss and finalize the RTU movement

w.r.t RE locations (from where to where).

In the 161st OCC Meeting, it was noted that SRLDC vide letter dated 08.11.2019

had taken up the issue of shifting of the PMUs at STATCOM, RE, Pump locations

etc. with PGCIL

SR II vide letter dated 19.11.2019(Annexure-3A) had informed that shifting and

decommissioning of PMU panels from Tirunelveli S/S to Udumalapet S/S and Trichy

S/s are in tendering process and orders are to be placed by December 2019 and

work completion is expected by January 2020. Further optimization of PMU

configuration is not possible in any other locations of SRTS II and balance

requirement may be incorporated in URTDSM Phase II Project.

SR I vide letter dated 18.11.2019(Annexure-3B) had informed that PMU from

Srikakulam had been shifted to Hyderabad (Ghanapur) and is integration is

underway. Balance requirement may be incorporated in URTDSM Phase II Project.

Subsequently SR I had informed that PO for commissioning works had been given

to M/s GE and commissioning is expected by 15th December 2019.

SRLDC vide letters dated 25.11.2019(Annexure-3C) had requested SRTS I &

SRTS II that shifting work of PMUs may be completed as approved in SRPC

Meeting. It was also requested that the status of shifting of PMUs may kindly be

updated and probable date of commissioning of PMUs in new location may be

intimated at the earliest.

In the Meeting, SRLDC expressed concern regarding the delay in shifting the PMUs

as approved in the SRPC Meeting.

SR I informed that in the 36th SRPC Meeting SR I & SR II were requested to explore

the possibility of shifting the PMUs as listed out. PMU from Srikakulam had been

shifted to Hyderabad (Ghanapur) (STATCOM) and is being integrated.Regarding

shifting of PMUs from Vemagiri to APTRANSCO S/Ss (KTS-6{PST}, Ramagudu{LI},

Medaram{LI}) SR I expressed difficulties faced by them in coordinating with

APTRANSCO/TSTRANSCO (during the execution of URTDSM Phase I project) and

suggested that this may be taken up in URTDSM Phase II project. Many issues like

permission to enter into S/Ss, lack of coordination, approvals etc were faced by

PGCIL. Management had taken a decision that shifting of PMUs to non Powergrid

stations will not be taken up by Powergrid.

SRLDC informed that these proposals are required in selected critical locations from

grid operation point of view considering RE integration, LI projects, phase shifting

transformers and network changes which havetaken place. SRPC decisions can be

relooked only if specific technical issues are pointed out. Citing coordination/support


issues the proposals cannot be dropped. SRLDC stated that even the funding issues

had been addressed.

SE(O), SRPC stated that as per CEA’s Connectivity Regulations, system operators

are empowered to get any real time operational data, SCADA data etc as prescribed

by them.

MS, SRPC requested APTRANSCO and TSTRANSCO to extend support to PGCIL

to carry out the works from grid security point of view.

DE, APTRANSCO said that a Powergrid representative may accompany M/s GE

when they come for installation/or any other works in APTRANSCO substations. He

assured that they will cooperate in carrying out the works. Prior information needs to

be communicated by PGCIL.

SR II & SR I agreed for the proposals for addition of feeders in the PMUs. It was

suggested that the issue may also be discussed with higher management during the

SRPC TP Meeting scheduled on 16.12.2019 at Hyderabad.

Conclusion in the Meeting:

SR I informed that PMU from Srikakulam had been shifted to Hyderabad

(Ghanapur) (STATCOM) and PO for commissioning works had been given to

M/s GE and commissioning is expected by 15th December 2019.

APTRANSCO/TSTRANSCO assured of required support at their end. Advance

information needed to be communicated by PGCIL.

After deliberations, SR I & SR II agreed to take up the other proposals of

adding feeders to existing PMUs (Karaikudi(SR-II), Narnoor & Mahboobnagar

(SR I)).

SR I stated that the discussions in the OCC would be communicated to the

Higher Management.

3.2 Delay in payment by NTPC to Powergrid SR I in respect of LDP

In the Meeting,SR I expressed concern regarding the non-payment from NTPC

Simhadri for the LDP relays (Line Differential Protection ) procured by Powergrid from

M/s GE on behalf of NTPC (as recommended by sub committees of SRPC).

NTPC requested SR I to furnish the details in this regard and assured that the issue

would be solved bilaterally/amicably.

3.3 Outage of SCADA data of RTUs

SRLDC vide E-mail dated 15.11.2019 had informed regarding the continuous outage

of SCADA data of 104 protocol RTUs. Some of the RTUs have been revived and

are reporting to main SLDC. The data of all 104 protocol RTUs are not reporting to

SRLDC back up Control Center.


RTUs at Karaikudi, Dharmapuri, C-Peta, Vijayawada, Khammam, Kudgi, N P

Kunta& NLC TS II Exp.etc are not reporting to SRLDC Main & Back Up Control

Centre.

SRLDC requested PGCIL to analyze the issue for ensure proper rectification and

non-repetition of such outages. Corrective action may be shared with SRLDC. Many

RTUs are under process of conversion to 104 protocol.

In the Meeting, SRLDC expressed concern regarding the outage at Ghanapur,

Khammam, Trivandrum, Hosur, Vijayawada, Trivandrum and Trichy where 101

protocol had been upgraded to 104 protocol. SRLDC suggested that the works may

be held up till the existing issues are resolved. Neyveli TS II data is not reporting

since two and a half month despite of continuous follow up by SRLDC.

Communication dated 13.11.2019 in this regard to PGCIL is at Annexure-3D) There

was no response from PGCIL.

SR II informed that the issues have surfaced during upgrading of RTUs from 101

protocol to 104 protocol. Issues at Kudgi, Dharmapuri, Vijayawada and Khammam

had been rectified. The issues of the remaining stations would be resolved within 15

days. SR II informed that NLCIL issue is due to NLCIL equipment compatibility issue

and lack of coordination at NLCIL/vendor end.

NLCIL informed that they are coordinating with PGCIL.

MS, SRPC opined that communication is a vital part facilitating smooth system

operation. Without proper data, real time operation is at risk. He suggested that

communication experts may be made available at each generating station, important

sub stations etc so that the issues may be resolved in a short period.

Conclusion in the Meeting:

SRLDC expressed concern on continuous outage of SCADA data of 104 protocol

RTUs. NLC TS II Expansion data was not updated since one and a half month.

SR II informed that the problem had been observed during reconfiguration while

upgrading of RTU protocol from 101 to 104. Support from SRLDC was also

required to resolve the issues. The issues would be resolved within 15 days.

NLCIL and SRTS II agreed to resolve the NLC TS II Expansion issues within one

week.

SRLDC suggested PGCIL to hold up the works of upgrading of RTUs to 104

protocol till the current issues are resolved.

3.4 Preparedness for Solar eclipse on 26th December 2019 - Handling Solar

generation steep reduction/increase

Solar eclipse would be experienced on 26th December 2019 and it will mainly pass

through southern part of India, severely effecting solar generation in Southern

Region. Solar eclipse starts approximately at 08:00 hrs and ends by 11:30 hrs.


In the 161st OCC SRLDC had presented regarding the effect of Solar Eclipse in SR.

All the states had assured that they can manage their load generation balance

during the solar eclipse with the available resources and proper load management.

Subsequently SRDC vide E-mail dated 25.11.2019 had furnished the operational

planning for solar eclipse day for Southern Region.

All the constituents had been requested to plan their load generation balance

accordingly.

In the Meeting SRLDC informed that in the last meeting SRLDC had furnished the

operational planning for each states and states were requested to come with their

own plan for control area wise LGB plan and submit to SRLDC.

KPCL informed that they have communicated to all the generators to not to take out

any units on solar eclipse day. In Karnataka 3600 MW Hydro power is available. If at

08:00 hours LGB can be met by 1500 MW in KPTCL control area, from 08:00 hours

2000 MW can be added at the appropriate ramp till solar eclipse ends. KPTCL and

KPCL needed to coordinate and finalize the schedules.

APTRANSCO informed that they have given instructions to GENCOs in this regard.

APTRANSCO was requested to take up specifically with Solar generators also.

Operators should be made available at solar generating stations on that day.

TANTRANSCO informed that they have circulated operation plan for solar eclipse

day to all the concerned which will be shared to SRLDC/SRPC. TSTRANSCO

informed that they can manage with Srisailam and N’sagar. LI schedule also may be

rescheduled. TSTRANSCO was requested to prepare a document and submit to

SRLDC.

SRPC requested ISG Stations to put additional staff in control rooms of stations to

control the generation/keep required ramp in case of emergency.

SRLDC informed that POSOCO(NLDC) had prepared a report on Solar Eclipse

which is available at NLDC website in the following link:

https://posoco.in/wp-content/uploads/2019/12/Solar-Eclipse-26th-December-2019-

Indian-Power-System-likely-impacts-and-preparedness-A-report.pdf

The following are the three major steps of concern:

1. Creating awareness among the concerned entities

2. Accurate estimation/forecasting of solar generation.

3. Acting as per the operation planning prepared

The following were concluded:

SRLDC had furnished the operational planning guidelines for solar eclipse day for

LGB management.

All SLDCs informed that the plan had been worked out. All SLDCs were

requested to finalize the plan (block wise) and submit to SRLDC.





ISG stations were requested to maintain adequate staff in the control room during

the eclipse.

SRLDC informed that NLDC had uploaded an operational planning report which

can be downloaded from NLDC website.

The final presentation & operational planning guidelines can be downloaded which is

separately uploaded as Annexure-3E.

3.5 Emergency shutdown

SRLDC informed that as requests are made through web portal, emergency &

opportunity shutdown, requests are also needed to be uploaded in the web portal.

SRLDC demonstrated the procedure. In the outage web portal another link is given

as emergency shutdown (for OSD also same needed to be selected and comment

may be made as OSD). Entities can request on D-1 or D day.

MS, SRPC stated that emergency shut downs needed to be discouraged until unless

real emergency is there. There is no provision for checking the gravity of emergency.

SR I informed that they are not able to download the outage request by other agency

of Powergrid lines (if the line is owned by PGCIL and S/Ss owned by other agencies

and line shutdown requested by other agencies). The request copy is required to be

submitted to SRPC for availability certification purpose.

SRLDC informed that they will look into the provision of enabling download

shutdown proposal/approvals by all irrespective of the ownership of the element.

SE(O), SRPC reiterated that emergency shut downs may be taken up by SRLDC

and SRPC concurrence may not be needed. As per IEGC Clause 5.2, in case of

contingencies like threat to grid security, equipment failure, life threat to human

beings etc., elements can be taken out and may be informed subsequently.

3.6 Kudgi PG test/ NTECL ramp test/ Simhadri APC Test

Ramp Test: NTECL

In the 161st OCC Meeting, all the states had agreed for the giving schedules for ramp

tests of NTECL. NTECL was requested to give the schedule on D-1 and on the day

also and the states would be informed accordingly.

Kudgi PG Test

Kudgi had furnished the schedule from 04.12.2019 to 07.12.2019 for combustion

adjustment / tuning and from 09.12.2019 to 13.12.2019 for performance guarantee

test. Full load for 8 to 10 hours would be required. Communications to States dated

09.11.2019 in this regard from Kudgi is at Annexure-3F


Subsequently NTPC Kudgi vide E-mail dated 08.12.2019 had informed that NTPC is

going to synchronize Unit-2 at 18:00 hrs on 9th Dec'19 for carry out Boiler PG test and

related activities. NTPC will intimate SRLDC control room regarding the required

schedule pattern (above tech min) on D-1 on daily basis. In view of SCED operation,

to facilitate smooth conductance of the Boiler PG test and related activities, it was

requested to change the Technical Minimum to 750 MW during the test period (16:00

hrs to 24:00 hrs)

Simhadri APC test

NTPC Simhadri vide letter dated 10.12.2019(Annexure-3G) had requested for special

generation schedule to facilitate conductance of Site Acceptance Test(SAT) of

Advanced Process Control (APC) package.


Advance Process Control (APC) package is under implementation in all the four

units of Simhadri. The package is a very significant project as based on the

success of this project the same is going to be implemented by all generators to

enhance better stability to grid and economic power generation. APC has been

commissioned in U-3 &4 of Simhadri and tests are to be conducted for

assessment & efficacy of new control loops.

Capturing complete data as per attached schedule is essential and forms base

for successful operation of APC. Implementation of successful APC will go a

long way in achieving desired ramp rates without parameter excursions and

helps in maintaining health of the machine for reliable operation leading to

reliable grid. Initially test will be done in Unit-4, after that similar tests need to

be done in Unit-3. The tests are scheduled to be started from 10.12.2019 &

total no. of tests is to be done in a span of 8 days.

After deliberations the following were concluded:

It was agreed that testing would be carried out between 16:00 hours to 22:00

hours preferably on week days (Monday to Friday).

It was agreed that NTPC/NTECL would discuss among themselves and come

out with schedule of testing. The same would be informed to

beneficiaries/SRLDC at least 5 days in advance and would be confirmed on D-

1 day.

The test would be allowed at only one station at a time.

3.7 RSD Issues

TSTRANSCO request to SRLDC to examine the possibility of one or two units

Ramagundam, NTPC under RSD

TSTRANSCO vide letter dated 29.10.2019 had informed that TS share (345 MW)

from Ramagunadam Units(I-VI) is being surrendered on day ahead basis. SRLDC

may examine the possibility of one or two units of NTPC, Ramagundam under RSD

and can accommodate other beneficiary share from other on-bar units so that other


beneficiaries will not be affected and TS can maintain their LGB optimally under

current low demand and high hydro generation availability period.

161st OCC conclusion

All the states were requested to revert back on the following before next OCC

meeting:

During the day of operation, SRLDC would take a call on the unit to go on

RSD or not depending on the grid conditions as per clause 6.2.2 of the

Procedure.

Whether the monitoring could be retained at 8 hours, or could be

reduced to 4 hours or the technical minimum criteria could be removed

completely on D-1 and on day of operation (requisitions as requested by

beneficiaries would be communicated to the generators).

It was agreed to follow the procedure as agreed in the 154thOCC meeting till

further conclusion.

In the Meetingall the states except TSTRANSCO opined that the procedure as

agreed in the 154th OCC would be continued.

RSD Procedure- TSTRANSCO proposal:

TSTRANSCO vide letter dated 03.12.2019(Annexure-3H) had furnished certain

cases to be considered for taking out generating units under shutdown (surrendered

quantum by single beneficiary/multiple beneficiaries is equivalent to ex-bus capacity

of one unit). TSTRANSCO desired discussion on the proposal in the forth coming

OCC Meeting and also preferred to submit the same to CERC.

In the meeting, it was decided that the new TSTRANSCO proposal would be further

discussed in the next OCC Meeting. States were requested to give their comments

in this regard.

3.8 High voltage in NTECL evacuation lines

NTECL vide E-mail dated 06.12.2019 had expressed concern regarding high voltage

experienced in NTECL evacuation lines. Voltage of 400 kV lines during November

2019 is enclosed at Annexure-3I. NTECL pointed out that generators are operating

in extreme points of capability curve (maximum MVAR absorption). In spite of high

MVAR absorption, all running equipments are subjected to higher voltage than rated.

NTECL requested to kindly look into high line voltage at NTECL, Vallur and accord

permission to take out lines during high line voltage condition.

In the Meeting, NTECL expressed serious concern regarding the high voltage

experienced in NTECL evacuation lines.

MS, SRPC desired to know the capacitor status(on or off) in the high voltage areas

in TANTRANSCO/TANGEDCO system. He suggested that all capacitors needed to

be switched off to arrest the high voltage. He also recommended that the node wise


flow of MVAR needed to be assessed for all the lines to find out whether lines are

injecting MVAR to generator side.

TANTRANSCO informed that they have taken up the issue with TANGEDCO.

TANTRANSCO confirmed that the TANTRANSCO capacitor banks at 110 kV level

and above are switched off. DISCOM level status needed to be checked.

The following were noted after deliberations:

TANTRANSCO was requested to take up the issue of capacitor switching off with

TANGEDCO.

TNSLDC may study the reactive power absorption at nearby generating stations

and direct the generators suitably. Reactive power absorption at Basin Bridge

could also be examined.

TNSLDC/SRLDC may examine opening of lightly loaded lines during high voltage

conditions. Reactor healthiness could also be ascertained.

3.9 High voltage condition maintained in various southern part of TN

TANTRANSCO vide letter dated 07.12.2019(Annexure-3J) had informed that during

low demand period many nodes in the Southern part of Tamil Nadu at 230 kV and

110 kV level are experiencing high voltage problems. To minimize the voltages

lengthy lines/lightly loaded lines connected to these nodes are being disconnected.

To avoid damage to equipments it is requested to keep PGCIL ICTs nearby these

nodes at standby condition.

In the Meeting, SRLDC & PGCIL stated that there won’t be any noticeable

improvement in voltage even if transformer is kept in idle charged condition as

transformer will absorb very meager MVARat no load. SRLDC felt that some

protection issues may also arise.

After discussion the forum concluded that there may not be any tangible

improvement by keeping the PGCIL ICTs nearby these nodes in standby condition

(in idle charge).

3.10 Deemed availability computation of M/s STPP U1 & U2

TSTRANSCO vide letter dated 27.11.2019(Annexure-3K) had requested for

clarification regarding availability computation of M/s STPP U1 & U2 during the

disturbance occurred at 400 kV Ramagudu substation in the month of March

2019/during PG tests :

Is there any timeline to consider deemed availability during black out

condition other than normal hot start up time timelines

Is there any precedence to consider higher DC for considering PG tests in

addition

In the Meeting, TSTRANSCO informed that on 12.03.2019 at 17:02 hours there was

a disturbance at 400 kV Ranadugu substation which led to tripping of 2x600 MW

STPP units on loss of evacuation. The units were synchronized at 16:12 hours on

13.03.2019 and on 16.03.2019 at 12:06 hours respectively. TSTRANSCO certified


the availability as per the information furnished by STPP for hot star up time and

time to reach full load etc. But STPP had raised certain issues regarding this

certification and TSTRANSCO requested for guidance of OCC forum in this regard.

Further TSTRANSCO had desired to know whether any provision is there to

consider higher DC during PG tests etc.


There was no approved procedure for deemed availability (DC) for ISG stations

during complete black out as it had not been defined upto which time period

from the time the external power is extended to the generating station the DC

can be assured.

NTPC/NLCIL/NTECL/NTPL stated that they would examine and revert back by

next OCC.

The issue of considering higher DC during PG tests (TSTRANSCO query) would

also be discussed in the next OCC.

3.11 SR II Agenda Items

PGCIL, SRTS II vide letter dated 04.12.2019(Annexure-3L) had requested the

following issues to be discussed in the 162nd OCC Meeting.

a) Clearance Issue: Construction of dead end tower of 230 kV Rasipalayam-

Mywadi feeder by TANTRANSCO near 400 kV Salem-Udumalpet line.

b) Signing of charging clearance formats of SRLDC


TANRANSCO informed that the tower is yet to be dismantled, action is being

taken by TANTRANSCO for the same. Another tower is being constructed

with required clearance from Salem-Udumalpet line.

SR II requested TANTRANSCO to furnish the updated drawings.

Regarding signing of charging clearance formats TANTRANSCO informed

that the formats had been sent to different wings and requested PGCIL to

forward the same to TNSLDC for them to facilitate the signing.

3.12 Clarification for decrease in Wind/Solar power generation in October 2019 in

comparison to October 2018

CEA vide letters dated 28.11.2019(Annexure-3M) had requested states to furnish

the reason for reduction in generation of Wind & Solar in October 2019 compared

to October 2018 to CEA urgently.

Also it was informed that the information as requested vide CEA letter dated

19.09.2019 requesting sharing of data of curtailment as per instruction issued by

RLDCs to their respective SLDC vide their letter dated 06.08.2019 for the months

of September and October 19 is still not received.

It is requested that both these information may please be shared urgently on email

id :[email protected]. and [email protected].

mailto:[email protected]



It was noted that Joint Advisor, NITI Aayog vide email dated 18.09.2019 has

sought information about curtailment of RE generation for preparing a report on

reference sent by PMO.

In the Meeting it was noted that TS and TN had submitted the data, AP and

Karnataka were requested to furnish the reason by 11.12.2019.

3.13 Renewable forecasting

As requested by OCC forum SRLDC presented the forecast, actuals and forecast

errors for wind and solar for the previous month in the OCC Meeting. All states had

been requested to furnish the implemented forecast, day ahead forecast &

actuals also(before 5th of every month). It was noted that this data was being

sought by higher forums and other entities.

In the Meeting, SRLDC presented the forecast, actuals and forecast errors for wind

and solar for the months of October 2019 and for November 2019.

It was observed that Telangana forecast error for Solar was better compared to

other states.

AP solar actuals were always less than forecast.

KAR solar actuals were much more than the forecast.

TN had furnished data for wind. Solar forecast was not furnished. Solar forecast

to be started by NIWE.

All the states were requested to analyse the forecast errors for improvement.

Improved forecast will help in better planning of LGB of individual state.

3.14 Daily Load Forecasting by SLDCs

In the Meeting SRLDC presented the error (forecast Vs actual demand) for the

month of November 2019(Annexure-3M-1). Except KPTCL all the states showed

nominal error. KPTCL error was more on 1st & 2nd of November 2019 because of

holidays on account of Karnataka Rajyothsava.

3.15 URTDSM project

SLDCs to make use of the Analytical Applications in close coordination with SRLDC.

Issues, if any, needed to be brought to the attention of PGCIL (Smart Grid) & IIT B.

The following were noted in the meeting:

SR II informed that SAVT of TN had been completed.

M/s OSI has been given one and a half month time to sort out all the issues and

PGCIL requested all the LDCs to coordinate and ensure completion of the works.

SR I expressed concern over the non-resuming of SAVT at APSLDC citing

different reasons and sought cooperation from APSLDC.

APSLDC stated that all the queries were not being replied by the vendor.

SR I/forum requested APSLDC to sort out the issues and ensure timely

completion of SAVT.


MS, SRPC stated that mutual coordination is very much required to solve the issues

and it is not appreciable to withhold the works because of lack of proper

communication.

3.16 Status of Implementation of the revised FGD Installation/ESP Up-gradation Plan

CEA/MoP is seeking updated information in respect of implementation of revised

FGD installation/ESP Up-gradation Plan and the regular updated may kindly be

furnished.

CEA vide letter dated 06.11.2019 had requested to submit the Phasing Plan for units

commissioned after 31.03.2019. In SR TSTRANSCO/TSGENCO is requested to

furnish the plan w.r.t. Kothagudam Stage VII Unit 7(800 MW) – COD -28.12.2018.

In the 161st Meeting TSGENCO informed that they will be furnishing the information

to CEA with a copy to SRPC.

SRPC had suggested to compile the information regarding Bhadadri(Manuguru)

TPS also whose COD is expected shortly.

TSSLDC/TSGENCO to furnish the information at the earliest to CEA with a copy to

SRPC.

CEA vide letter dated 27.11.2019(Annexure-3N) enclosing MoP letter dated

01.11.2019 had enclosed the consolidated information received from various

developers for their respective FGD implementation phasing plan.

It had been requested to all concerned that the missing information if any (regarding

upcoming projects/units) may be furnished to CEA with a copy to SRPC. Also the

furnished information in the Annexure may also be scrutinized and discrepancies, if

any, may be brought to notice.

In the Meeting it was noted that a Meeting is scheduled on 11.12.2019.

Subsequently it was noted that a Special Meeting was convened on 11.12.2019 at

SRPC Bengaluru.

Minutes has been issued on 12.12.2019. All concerned generators to revert back by

20.12.2019 with comments, if any.

3.17 Requirement of fresh CEA clearance for restoration of transmission elements,

which were under breakdown for more than 6 months

Central Electricity Authority (Measures relating to Safety and Electric Supply)

Amendment Regulations, 2015 clause no 43 is reproduced below:

“Every electrical installation of voltage above the notified voltage and all the apparatus

of the generating stations and above the capacity specified under regulation 32, shall

be required to be inspected and tested by the Electrical Inspector before

commencement of supply or recommencement after shutdown for six months and

above for ensuring observance of safety measures specified under these regulations:


Provided that the owner or supplier or consumer has the option to get his installation

inspected and tested by the Electrical Inspector of the Appropriate Government.”

In the Meeting, MS, SRPC stated that this is an important regulation in view of

safety requirements and needs to be followed by State utilities, Private utilities and

Central sector utilities in the field of power sector.

All the entities are requested to take note of the same and take up with the

concerned wings.

3.18 Commissioning of Edamon - Kochi line

In the Meeting, SR-II informed that Circuit II is expected to be commissioned by 20th

December 2019.

Subsequently it was noted that Tirunelveli- Kochi Circuit II was charged and

synchronized to grid on 14.12.2019 at 16:35 hours.

3.19 Shutdown of Kochi-Trichur

In the Meeting KSEBL informed that PGCIL had requested for an outage of 25

days for Kochi-Thrissur line to facilitate LILO/tapping arrangements of the line at

320kV HVDC substation/Thrissur. There were other shut downs(Madakkathara-

Lower Periyar 220 kV line for 75 days- making LILO at Chalakkudi S/S-conversion of

single ckt single voltage to multi ckt multi voltage is involved) planned and the

shutdown of Kochi-Trichur could be taken up immediately.

SR II agreed for the same. The shutdown was approved w.e.f. 15.12.2019 to

05.01.2020.

Subsequently, KSEBL vide letter dated 17.12.2019(Annexure-3O) informed that

due to the above shutdown, ATC reduction of 340MW is imposed for import to

Kerala control area. This has severely affected the import capability of the State

thereby unsettling the load generation balance. As annual overhauling of number of

hydel machines is scheduled from first week of January 2020, the State will depend

on import of power to meet the shortages. KSEBL requested PGCIL, SR II to

compress the shutdown period from 15thto 31stDecember 2019 so that the ATC is

restored back from 1st January, 2020. Balance work, if any, can be concurred after

improvement in the internal generation availability.

3.20 Disaster Management Group

Plant Level Emergency Group (EMG) formation confirmation to be communicated by

GENCOs/generators/RE generators.

It was noted that Plant Level Nominations had been received from the following:

NTECL, Vallur NPCIL

NTPL Tuticorin TPS & NCTPS (TANGEDCO

HNPCL NTPC(All NTPC Stations including Kayamkulam).


UPCL CEPL

KSEBL RTPP and VTPS(APGENCO)

KPCL

In the Meeting the following were reiterated:

The first Meeting of RDMG for power sector was convened on 23.10.2019 at SRPC

Bengaluru. Minutes of the Meting are available at SRPC website. SRPC vide letter

dated 31.10.2019 had communicated certain issues to CEA which were to be put up

to CDMG as per deliberations in the Meeting.

MoP had convened a meeting regarding manual of electrical infrastructure for

natural disaster related to SRPC on 20.08.2019. There are few actionable points

which need to be complied. SRPC vide letter dated 30.09.2019 had communicated

in this regard to concerned entities. The following information were requested to

furnish:

I. Nodal Officers from DISCOMs / TRANSCOs

II. Central Basic Pool material

III. Need for communication equipment which may be maintained as

centralized spares

IV. Electrical infrastructure recovery Plan

V. Insurance/Funding

KPTCL vide letter dated 25.11.2019 (Annexure-3P) had furnished the details as

required to be furnished as per MOM of the MoP Meeting held on 20.08.2019.

All the other concerned are requested to take action as per the minute of the

meetings held on 20.08.2019.

Disaster Management plan needed to be / updated by all the concerned entities

keeping in view the CDMP for power sector released by CEA / MoP and other

guidelines etc. The same would be submitted to RDMG.

3.21 Simhadri /Ramagundam Islanding scheme

In the 161st OCC Meeting, APTRANSCO had informed that the scheme for Simhadri

islanding had been put up to Director for approval. SRLDC had informed that

Ramagundam islanding Scheme would be reviewed considering LI Pumps.

In the Meeting the following were noted:

Simhadri Islanding: APSLDC informed that they have submitted the updated

scheme. SRLDC informed that they have submitted the base case which is not

sufficient for analysis and requested APTRANSCO to furnish the list of the lines

being opened and the list of generators(IC/generation considered) for formation of

the island. SRLDC/SRPC would review the same.

Ramagundam Islanding: SRLDC informed that they have initiated the job, but in

the island around 6990 MW LI scheme generation is involved and there is no


clarity regarding the actual generation and connectivity. Existing scheme may not

work. It was agreed that TS(study team & SLDC) SRLDC & SRPC would discuss

the Ramagundam islanding Scheme in a separate meeting in the first week of

January 2020. Meeting would be called by SRLDC.

3.22 Energy Scheduled inside the region and outside the region from REs

CE(RPM) division, CEA vide letter dated 03.06.2019 had requested for the details -

"Energy Scheduled inside the region and outside the region from RE generating

station which has been given connectivity & LTA on Green Energy Corridors (both

Central & State)".

WPDs/SPDs connected to Sub stations under Green Energy Corridor along with

Installed Capacity (MW) details & corresponding schedules and actuals (from April

onwards) needed to be submitted.

No information had been received from any of the entities (KSEBL had informed that

at present they don’t have any WPD/SPD installed under GEC).

In the Meeting, KPTCL informed that they have written to Planning and RE wing

requesting them to furnish the details urgently vide letter dated

19.12.2019(Annexure-3Q).

TSTRANSCO confirmed that there is no WPDs/SPDs under GEC Corridor.

APTRANSCO informed that they have taken up with planning wing.

All the concerned entities to furnish the information at the earliest.

3.23 Technical Specifications of Interface Meters

The matter regarding the finalization of technical specifications required for the

Interface Energy Meters (IEM/SEM with AMR, configurable recording intervals etc.)

was deliberated in various meetings.

It was noted that PGCIL needed to take action in compliance of SRPC decision (not

to link with other issues like common specifications for all the regions etc).

In the 160thOCC Meeting, it was agreed that parallely Pilot SEMs could be installed

to assess the performance. The final specifications for SEMs under AMR could be

prepared but frozen after amendment of CEA Metering Regulations is notified.

In the 161st OCC Meeting SR-II informed that they were in touch with SRLDC to

finalize the specifications at SRLDC end.

In the meeting, Senior GM, SR II informed that they have visited CDAC and had

requested CDAC to give budgetary offer. He suggested that testing of meters may

be started, by the time CEA may also notify the specifications.

SE(O), SRPC desired to know the status of Data center (Processing at SRLDC

control center). He recalled that the requirement of AMR were raised by states and

arose because of sign change violations. Even though that provision had been

relaxed now, it will be implemented again from 01.04.2019. States also needed to

take up with PGCIL in this regard. PGCIL was entrusted to freeze the specifications


and needed to come up with proposal/cost estimate to SRPC. SRPC may take the

decision.

CE, KSEBL recalled that the issue had been discussed in various forums of SRPC

and SRPC also had approved for the implementation of the same by PGCIL. He

requested PGCIL to give a road map of the implementation of the project.

Conclusionin the Meeting:

SR II assured that technical specifications (including at SRLDC control Centre)

would be finalized within one month. The project may be completed in one year.

All the states suggested PGCIL to take necessary steps to comply with SRPC

decision.

3.24 Periodical Audit and Vulnerability Assessment & Penetration Testing (VAPT) of

Infrastructure

CISO MoP vide letter dated 31.01.2019, 20.02.2019, 22.04.2019 and 29.05.2019

had requested all stake holders to carry out Cyber Security Audit and VAPT of ICT

Infrastructure, website, web application etc in defined intervals by CERT-IN

empaneled cyber security audit agencies to avoid vulnerability and report to CISO

MoP along with the key findings of the audit. The above details may kindly be sent

to [email protected] with a copy to [email protected].

SRPC vide letter dated 31.10.2019 had requested CE(IT) & CISO, MoP to arrange

presentation from officers of CERT-in/NCIIPC in OCC Meeting to give exposure on

the procedure for VAPT and ICT Cyber Security Audit.

The following entities had carried out the Cyber Security Audit during the year 2019-20:

Entity Date Entity Date

APTRANSCO – VA

Audit of assets

13.05.2019 TSTRANSCO – VA

Audit

08/09.05.2019

NTECL– IT Audit 18-21.06.2019 PGCIL – GIGW

Certification of

website

14.01.2019 – Valid

till 13.01.2022

SRLDC

Main SRLDC

SCADA

25.02.2019 &

27.02.2019

Next schedule is

Feb/March 2020

SRLDC

Backup SRLDC

SCADA

27.02.2019 &

28.02.2019

Next schedule is

Feb/March 2020


KPTCL informed that tenders for third party auditing of Control Centers of SLDCs

would be opened on 18.12.2019.

KSEBL informed that the WO for Cyber Security Audit for Control Centre would be

completed by 15.01.2020.




TSTRANSCO informed that C-DAC was yet to take up Security Audit of

TSTRANSCO website.

CERT certified agencies needed to be approached for the audit.

SRPC pointed out that as per CERC Regulations Cyber Security Audit was to be

carried out for the year 2019-20. All the concerned entities needed to take note

and communicate the dates and details in this regard to SRPC.

MS, SRPC emphasized that vulnerability from internal sources/insider also needed

to be taken care other than external sources.

3.25 Data requested by CEA- Optimal Generation capacity Mix for the year 2029-30

CEA had communicated that a draft report on Optimal Generation Capacity Mix for

the year 2029-30, which was on public domain for comments of stakeholders. One

of the comment received was regarding change in Load pattern (8760 hours) due

the shift of agricultural load from peak time (usually night time to afternoon time

when solar is available) by many states. In this connection, it was required to

analyze the impact of shifting of Agricultural load and its impact on the All India

hourly demand patter in recent time.

To analyze the impact the following data is required at stage/regional level:

1. Hourly regional load data (in MW) of 8760 hours for the last 3 years.

2. Year-wise, state-wise hourly agricultural load data (in MW) of 8760 hours for

the last 3 years for the states which have witnessed the shifting of

Agricultural electrical load from peak to off peak hours over the last few

years.


Hourly regional load data (in MW) of 8760 hours for the last 3 years-SRLDC had

furnished SR Demand. Only AP had furnished the details among the states.

Year-wise, state-wise hourly agricultural load data (in MW) of 8760 hours for the

last 3 years for the states which have witnessed the shifting of Agricultural

electrical load from peak to off peak hours over the last few years.- All the states

to furnish.

APTRANSCO informed that they have received data from APEPDCL and data

from APSPDCL is awaited. After receiving data from APSPDCL consolidated

information would be furnished.

KPTCL informed that they would furnish the information within 15 days(by

December end)

TANTRANSCO informed that they would furnish the information shortly.

3.26 MoP Requirement: Updation of existing transmission system.


MoP had desired for information regarding existing transmission system (220 kV and

above, AC and DC Voltage level) in the country as on 31.03.2019. CEA had already

prepared the same and is available on the Link https://bit.ly/33qsbgN.

Vide letters dated 11.10.2019 CEA had requested States (STUs) and PGCIL to

update/correct the information in the file available at the above link. It was also

requested to furnish the State power map and single line diagram of transmission

network (to be submitted by States) and regional level power map (to be submitted

by Powergrid).

In the Meeting it was noted that SR I & SR II had furnished the details. States were

requested to verify and update and upload the sought information. SLDs & Power

map are to be submitted separately. CEA vide letter dated 29.11.2019 had sent

reminder in this regard.

3.27 Relocation of SPS schemes

In the Meeting SR II informed that except KPTCL, at all other locations signals are

through till load centers.

It was noted that two convertors were required for each link to extend the signal

from control room to Kiosk in SAS stations. This requirement was noted during a

visit to Hassan Station(SAS sation). States recommended that the cost of the

convertors and associated cable etc could be booked in the project cost.SR II

informed that they will procure the converters shortly and they have approached

manufactures.

KPTCL to take up with PGCIL for the modifications at Kolar.

The following activities to be carried out:

Carryout the pending works (refer Annexure No.V of 77 PCSC MOM).

Carryout the mapping of the feeders in coordination with SRLDC.

Furnish the revised list of feeders along with load reliefs under various

SPS.

All states to communicate the compliance report in this regard to SRPC /

SRLDC.

The mock drills in coordination with PGCIL and SRLDC would be carried out after

all SPSs schemes are put in place.

3.28 Reliability of SPS Schemes

In compliance of Commission’s Order dated 26th March 2018 in Petition No.

09/SM/2015, the list of SPS in SR had been communicated to all concerned. SRLDC

was to furnish the details of ISTS SPSs and SLDCs for other intra state SPSs. This

information is to be submitted along with OCC on monthly basis.

SRLDC vide letter dated 09.12.2019 (Annexure-3R) had furnished the SPS

operation during November 2019. It was noted that SPS of Talcher- Kolar operated

on 05.11.2019 at 10:55 hours. Total load relief was 948 MW –as follows:

https://bit.ly/33qsbgN


TN – 208(desired 395), KAR-600(desired 250), AP-140(desired- 230)


APTRANSCO informed that Madanapalli load relief was wired at 220 kV

APTRANSCO SS (from earlier at 110 kV feeders).

APTRANSCO informed that RE injection feeder segregation would take 3 months.

There were no radial feeders available in Cuddapah region.

It was noted that APTRANSCO can identify the radial feeders anywhere in the

state.

SRLDC would come out with details (specified documentation) on SPS for Raigarh

– Pugalur HVDC bipole link.

KPTCL was again requested to analyze the reason for relief being realized.

3.29 Weather forecast by IMD

SRLDC had informed that IMD had offered that if states provide required space for

installing the weather monitoring equipment at substations they will provide weather

forecast information location wise to SLDCs also. When formal proposal from IMD is

received, it will be put up to OCC for further direction. (SRLDC to coordinate).

In the Meeting SRLDC was again requested to revert back with formal proposal

after discussion with IMD.

3.30 Declaration of “Peak” and “Off-Peak” Hours in a month and high and low

demand seasons

As per clause 42(3) CERC (Terms and Conditions of Tariff) Regulations, 2019, the

hours of Peak and Off-Peak periods during a day shall be declared by the

concerned RLDC at least a week in advance.

In the 161st OCC Meeting SRLDC had projected the procedure and had explained

the computation. SRLDC was requested to come out with the sample

computations for computing Peak and Off-Peak hours during wind, non-wind

seasons etc. The results may be on the total demand and on total demand – RE to

have more comprehensive understandings of the procedure.

In the Meeting, SRLDC presented the analysis considering the data from

November 2018 to October 2019. It was observed that when net demand is

considered peak hours are coming at 08: 00 hours to 09:30 hours and in evening

18:00 hours to 19:00 hours and when peak demand is considered peak hours are

coming at day hours(solar hours).

TS, KAR & KER agreed for (total demand – RE). TN and AP stated that they

would revert back.

SRPC/SRLDC also suggested that peak hours could be declared on net demand

which will capture the need for thermal power.


SRLDC was suggested to share the analysis to all the concerned.

States/Generators were requested to revert back on the analysis. The peak hours

and off peak hours may be frozen by February 2020. As per Regulation this can be

reviewed weekly also.

3.31 Request for additional assistance to Yerandahalli by KPTCL

It was noted that additional support was extended from Hosur S/s after implementing

the SPS from 25.10.2019. TANTRANSCO vide letter dated 07.11.2019 had

communicated regarding frequent tripping of SPS since KPTCL was drawing more

than 140 MW power which was over loading 230 kV Hosur PG- Hosur D/C line

enabling the SPS operation.

161st OCC conclusion:

KPTCL would restrict the drawals as agreed in the special meeting (held

through VC on 03.09.2019)

KAR SLDC would appraise the Management and communicate to the field

and BESCOM to restrict the loads.

KAR SLDC would map the feeder loadings of 230 kV Hosur (PG)-Hosur (TN)

lines and create an alarm to take preventive action to avoid triggering of SPS.

KPTCL would furnish their proposal of enhanced request considering the

conductor rating, reconfiguration etc to TANTRANSCO for consideration.

TANTRANSCO would revert back on the proposal of KPTCL.

KAR SLDC had informed that two officials have been deputed to

TANTRANSCO Hosur SS for effective load management in Karnataka

system.

KPTCL had informed that they are taking all steps to ensure revival of the

system by 10.01.2020 as requested by TANTRANSCO.

In the Meeting the shut down on Hosur-Yerandanahalli line was agreed from

12.12.2019 to 21.12.2019 for reconfiguration works at Yerandanahalli.

The 220KV Somanahally-Yerandanahally line LC work in Mylasandra project has

been availed on 27.10.19 in the view of conversion of existing 220KV S/C line

between Mylasandra SS to Yerandanahally SS for the period of four months.

During the line clear period additional feed of 120 MW was fed from Hosur SS

towards Yerandanahally SS.

In this scenario with the additional load assistance from Hosur SS, the LC work has

been completed and charged on 09.12.2019(letter dated 09.12.2019 at Annexure-

3S) and from then Yerandanahally is being fed from Somanahallyby about 170-

180MW and from Hosur by about 50-60MW in regular manner.


The shut down on Hosur-Yerandanahalli line was agreed from 12.12.2019 to

21.12.2019 for reconfiguration works at Yerandanahalli to take up tower erection,

stringing and dismantling works at Yerandahalli.

After SLDC concurrence all the line work has been completed between Mylasandra

to Yerandanahally SS and further no additional load feed assistance is required from

Hosur SS in the view of line work in Mylasandra scope of project.

3.32 NPCIL Units availability during peak demand period

161st OCC conclusion

KKNPP informed that unit-II would be taken out from 09.12.2019 to

11.03.2020 and unit-I would be taken out from 22.03.2020 (75 days till

04.06.2020). The revival of unit-II would be monitored and accordingly part

loading of unit-I, if required, would be considered from February 2020.

All constituent states recommended the suggestion of TANTRANSCO of part

loading of KKNPP unit-I from November itself.

KKNPP informed that they would put the request of TANTRANSCO/other

beneficiaries to the management and revert back.

KKNPP vide letter dated 03.12.2019(Annexure-3T) had furnished the over hauling

programme of KKNPP Units. Power generation from KKNPP Unit I had been

reduced to 600 MWe for taking up some M/W(was operating at 1000 MWe till

31.11.2019). Generation would be normalized on 03.12.2019. Unit -I generation

will be restricted to 900 MWe in the month of December 2019(based on

TANTRANSCO’s request) and further review will be taken based on the progress

of Unit II S/D works scheduled from 15.12.2019. It was informed that compensation

to KKNPP for the reduced power operation will be dealt separately.


KKNPP informed that unit-II would be taken out from 15.12.2019 to 17.03.2020

and unit-I would be taken out from first week of April 2020 for 75 days.

KKNPP informed that Unit I would be generating 900 MW based on the request

of beneficiary(ies). He informed that they are in receipt of a letter from Chief

Engineer, APTRANSCO in this regard and part load compensation issues

would be taken up separately.

3.33 Scheduling Issues of Pavagada Solar Park

In the Special Meeting held on 31.10.2019 w.r.t scheduling of Pavagada Solar Park,

it was decided to start actual scheduling & accounting of Solar Park from 04.11.2019

for the SPDs connected to S/Ss 3 & 4. SRPC vide letter dated 14.11.2019 had

requested SRLDC to furnish the schedules of these SPDs for the week starting from

04.11.2019.

SRLDC vide letter dated 18.11.2019(Annexure-3U) had informed that the details in

SRPC letter and details given by KSPDCL vide letter dated 06.11.2019 are not


matching and so scheduling and subsequent providing of meter data to SRPC could

not be completed by SRLDC from 04.11.2019. SRLDC suggested to convene a

Meeting in this regard.

SRPC vide letter dated 25.11.2019(Annexure-3V) had requested SRLDC to furnish

the following information and concluded that a Meeting as suggested by SRLDC

may be convened after receiving these information from SRLDC

Views of NLDC on KSPDCL letter dated 17.10.2019(requesting SRLDC to

waive registration charges)

SRLDCs approach on operationalized LTA vis-vis SPDs under COD of

Pavagada Solar Park

In the Meeting, it was noted that a Meeting was held on 05.12.2019 at SRPC

Bangalore. It was agreed that scheduling and accounting of the SPDs by

SRLDC/SRPC which are part of operationalized LTA (1000 MW) would commence

from 00:00 hours of 30.12.2019. Balance 1050 MW would be scheduled by

SRLDC once the LTA is operationalized by CTU. It was agreed that a review

Meeting would be held on 20.12.2019.

3.34 High Loading of Hiriyur- Nelamangala

In the Meeting, SR II informed that 400 kV Hiriyur-Mysore line would be

commissioned by March 2020 (Original schedule – December 2019). They are

trying to complete the works by January 2020.

OCC requested PGCIL to complete the works at the earliest as LTA

operationalization of Pavagada SPDs was linked to commissioning of these lines.

PGCIL needs to take this issue seriously since SPDCs scheduling by SRLDC will

be held up.

3.35 High Voltage in Karnataka Control Area

SRLDC in its agenda for 161st OCC Meeting had expressed concern regarding the

Critical Grid Operation in Karnataka control area due to over voltages.

Conclusion in the 161st OCC Meeting

KPTCL had informed that the issue has already been referred to RT wing.

SRPC had suggested KPTCL to check the overvoltage grading set points

also.

KPTCL needed to submit action taken report in this regard.

The following were noted in the Meeting

There was no update by KAR SLDC.

3.36 Delay in revival of Nelamangala-Dodaballapur line

In the Meeting, KPTCL informed that Nelamanagala-Dodaballapur 220 kV D/C line

was under shutdown(taken by PGCIL-approved for two days for 8th& 9th December

2019). But the lines were not revived in scheduled time. There was interruption in


220 kV system and many lines tripped. Hoody – BIL line survived which was

feeding International Airport, otherwise it could have been a very serious issue.

PGCIL informed that the works were delayed due to ROW issues and they had

requested KPTCL for extension of LC for one day.

KPTCL stated that the request came by night 9 O’clock only. PGCIL need to

assess the requirement of shut down period before taking approval of elements

and any delay in revival need to be informed well in advance.

SRPC opined that this issue needed to be taken seriously since there was a

chance for interruption of Airport supply and requested PGCIL to avoid such

situations in future.

3.37 Deviation in drawals by states

SRLDC vide letters dated 15.11.2019(Annexure-3W had expressed concern

regarding deviation in drawals by AP, KAR, TS and TN. These states were

requested to take action in real time on the messages issued by SRLDC and also

furnish reply to SRLDC letters issued subsequently.


There were sustained over drawals and under drawals by beneficiaries.

SRLDC stated that the violation messages were issued accordingly. SRLDC

informed that they will be forced to go for physical regulations if states are not

keeping their drawals in limits.

Entities were to take action in real time on the messages issued by SRLDC and

also furnish reply to SRLDC letters issued subsequently.

3.38 Automatic Generation Control (AGC) implementation in India

CERC in its Order dated 28.08.2019 had stated, ‘ In the interest of reliable and safe

grid operation, the Commission directs that all the ISGS stations whose tariff is

determined or adopted by CERC shall be AGC-enabled and the ancillary services

including secondary control through AGC be implemented’.

As per CERC Order dated 28.08.2019 all ISG stations whose Tariff is determined or

adopted by CERC should be AGC-enabled before 28th February 2020.

NLDC vide communication dated 17.09.2019 had furnished the minimum requirement

for AGC connecting equipment at Power plants. List of power plants identified for

monitoring by NLDC was also enclosed.

A Meeting was held on 03.10.2019 at NLDC to discuss on the requirements for AGC

to be implemented at generator ends by the generators and activities to be undertaken

by them for speedy implementation of AGC. The minutes are available at NLDC

website. All concerned were requested to go through the minutes and initiate the

actions accordingly.


A Meeting in regard to communication availability from NLDC/ RLDCs to the nearest

wide band node/ switchyard for the generating stations under AGC as per CERC

Order 319/RC/2018 was held on 13.11.2019 at SRPC Bengaluru. The minutes of the

meeting is available at SRPC website.


PGCIL, SR II informed that communication ports are available at all the locations

and there is a requirement of optical cards/optical fiber in some locations. The final

requirement along with estimate will be finalized shortly.

SR II was requested to come up with the detailed list of requirement with estimated

cost. The same was to be put up to TCC/SRPC for approval.

SR II agreed that they will submit the final estimate by end of December 2019.

3.39 Implementation of revised AUFLS settings in SR(SRLDC Agenda-1(i))

In the Meeting all states agreed for increase the AUFLS settings by 0.2 Hz viz.

49.4, 49.2, 49.0 & 48.8 Hz. after 9th NPC minutes are issued.

3.40 Shutdown request of NTPL-Tuticorin D/C line

Conclusion in the 161st OCC Meeting

NTPL requested TANTRANSCO to restore the 230 kV connectivity to NTPL

switchyard (230 kV NTPL –TTPS & 230 kV NTPL-TTN Auto).

POWERGRID had informed that one ERS is ready to charge (8 hours for

jumpering to ERS) and for the other ERS works had already been initiated.

TANTRANSCO vide letter dated 31.10.2019 had raised some compensation

issues during the shutdown.

SR-II, PGCIL informed that the matter had been referred to the management. The

same would be put up to SRPC Meeting.

It was noted that the calculation projected in TN letter may be relooked. Backing

down of Tuticorin units was not envisaged in the revised proposal.

SRPC had suggested that compensation being a bilateral issue, it may be solved

amicably through discussion in top level management.

It was noted that the compensation issues should not be linked with the shutdown

approvals in OCC. OCC was a technical forum where issues of ATC curtailment,

line loadings, injection restrictions, load generation balance, precaution during

shutdown etc are discussed. Compensation issues, if any, could be taken up to

TCC/SRPC through commercial committee meetings.

Subsequently it was noted that the issue of 230 kV connectivity of NTPL was

discussed in the Joint Study Committee Meetings held on 21stand 22nd November

2019 at New Delhi.

In the Meeting SR II informed that NTPL confirmation is awaited for availing the

outage.One ERS is ready and other ERS will be ready shortly.


SE(O), SRPC suggested that PGCIL may furnish an official request to

SRLDC/SRPC for shut down whenever ERS is ready with specific dates, timings

etc. NTPL concurrence to be sought accordingly.

230 kV connectivity of NTPL was discussed in the Joint Study Committee Meetings

held on 21st and 22nd November 2019 at New Delhi. In the minutes the following

had been noted:

Upon examination of the minutes of the 24th meeting of SCPSPSR, it was

found that following transmission system had been agreed as the

evacuation system for Tuticorin TPS JV (2x500 MW):

i) Tuticorin JV TPS – Madurai 400 kV D/c quad

ii) 2x315 MVA 400/220 kV ICT at Tuticorin TPS JV

iii) LILO of 2 nos. of 230 kV circuits at Tuticorin TPS JV

Accordingly, the referred 2 nos. of 230 kV circuits at Tuticorin TPS JV is a

part of ATS.

TANTRANSCO stated that the referred 230 kV lines cannot be utilized for

the evacuation of power from Tuticorin JV as the same leads to congestion

in the downstream network.

It was decided that the referred 230 kV lines may be by-passed through

suitable arrangement under normal operation to avoid congestion in

downstream networks and the same may be utilized for drawl of start-up

power whenever required.

Further the proposal shall be put-up in the upcoming SRPC-TP for approval

of the constituents.

Subsequently Meeting of first SRPC-TP was convened on 16.12.2019 at

Hyderabad. Minutes of the Meeting is awaited.

3.41 High Voltage at UPCL & Outage of UPCL ICT


KAR SLDC informed that 400 kV Hebbanahalli S/s (Yettinahole LIP) would be

handed over to KPTCL and was expected to be taken over by March 2020.

For reactor implementation, UPCL had earlier informed that KPTCL approval

(drawing etc) was being undertaken. Electrical approval will be received only after

KPTCL approval. KPTCL requested UPCL to write a reminder to PCKL and share

the same with KPTCL so that KPTCL will also take up with PCKL.

For repair of ICT, UPCL had informed in the 161st OCC meeting that the ICT was

expected to reach the site by end of December 2019 and the charging was

expected by 15th January 2020.

Vide letter dated 07.11.2019(Annexure-3X) KPTCL had taken up with UPCL and

expressed concern that with one ICT at UPCL yard UPCL is declaring DC for both

the units. UPCL had been requested to restore the ICT at the earliest.


3.42 Scheduling of Solar parks

Ghani Solar Park :

APTRANSCO had informed that the matter was under review.

It was noted that one of the SPD had approached Hon’ble CERC in this regard.

APTRANSCO informed that they were taking with CERC in this regard.

3.43 Testing of Primary frequency response of generators as per IEGC clause 5.2(g)

SRLDC had informed that deviation of three agencies had been opened. There

were some queries by the bidders which have been replied by NLDC. The price-

bid will be opened by end of December 2019.

3.44 AGC at state Level- Pilot Project identification & Implementation


Andhra Pradesh (APGENCO: Krishnapattanam): M/s GE had submitted a

proposal for AGC at Krishnapatnam/APSLDC. Note has been put up to the

management for budgetary approval.

Karnataka (KPCL: Sharavathy / Varahi):Sharavathy expected to be completed

by end of January 2020. Varahi is expected by February 2020. Payments to M/s

ABB has been released by M/s USAID. Final configuration would be taken up.

Kerala (KSEBL: Kuttiadi&Idukki): M/s ABB had visited Kuttiadi SS on

15.11.2019 and a Meeting was also held in this regard. On 16.12.2019 M/s ABB

was scheduled to visit SLDC. Specifications would be finalized in next two to three

Meetings.

Tamil Nadu (TANGEDCO: North Chennai Stage-II and MTPS Stage II):

TANGEDCO/TANTRANSCO had informed that the administrative approval was

yet to be received and technical specifications are under preparation jointly by

TANTRANSCO and TANGEDCO.

Telangana (TSGENCO: Kothagudem E): DPR prepared and waiting for

budgetary offer. Dummy protocol testing from Kothagudem to SLDC was under

progress.

SRLDC had informed that NP Kunta AGC was targeted to be commissioned by

February 2020. The proposal would be discussed with APSERC/APDISCOMs.

3.45 Issues w.r.t KGS

There was no representation from Kaiga GS which was noted with concern.

The following were noted in the 161st Meeting:

SEM related issues had been taken up with SR-II vide letter dated 09.04.2019.

SR II had informed that estimate (cost +) had been furnished to KGS.

KGS had informed that the matter was under consideration.

Regarding Sirsi-Guttur section of Kaiga–Sirsi

KPTCL had informed that they have replaced 20 numbers of tension strings.

Further replacement of 15 numbers and 22 numbers of insulator strings was


planned, for Line I estimated cost is around 1.13 Crores and for line II it is

2.08 Crores.

Further activities are not carried out because of rains.

Kaiga-Narendra I &II PLCC Channel Non-Availability

KGS vide E-mail dated 06.11.2019 had informed that on 05.11.2019 it is

observed that Kaiga-Narendra Line I & II Channel I is in alarm condition.

Narendra S/s also confirmed that the same channel is in alarm condition at

Narendra end also.

SR II informed that channel II was rectified.

Channel I was to be rectified by Kaiga GS(in coordination with KPTCL)

3.46 Hoody Reactor status

In the Meeting, KPTCL informed that Hoody reactor would be commissioned by

end of 15th January 2020.

SRLDC informed that Nelamangala Bus reactor (commissioned on 19.10.2019)

data is not reporting. KPTCL agreed to look into the same.

3.47 URS availability of other regions

It was noted that URS availability of WR was not visible after the LC/PS

mechanism. SRLDC stated that they are working on it.

3.48 Rectification of OF cable between EDC to HAL

In the Meeting KAR SLDC had informed that EDC to HAL link will be rectified by

end of December 2019.

3.49 REMC facility installed at SRLDC

In the 161st Meeting SRLDC informed that SAVT (1000 hrs) test had been

completed. The list of pending works was being compiled.

3.50 REMC Project in SR SLDCs


KAR SLDC: SAVT completed by 25.09.2019. Forecast Software under evaluation.

AP SLDC: SAT over. SAVT stopped on 13.10.2019 due to some issues. M/s OSI

was working on it. SAVT was scheduled to start

from10.12.2019.(Communication/mail dated 11.12.2019 in this regard at Annexure-

3Y)

TN SLDC: SAVT completed.

All the entities (except TANTRANSCO) were requested to furnish the balance RE

stations still to be integrated in REMC. The upcoming requirement for next two years

may also be furnished to PGCIL. If PGCIL is not taking up the integration of balance

RE stations, then the states needed to integrate the balance RE stations into REMC

at their own cost/initiative.

3.51 LI projects grid integration


In the 161st OCC Meeting, APTRANSCO had informed that a Meeting had been

convened regarding the coordinated operation of LI pumps in which it was opined

that there was no scope of reactive control through LI pumps. Further studies

needed to be carried out.

There was no updates in the Meeting.

3.52 Andhra Pradesh: Coal issues

APGENCO vide letter dated 11.11.2019(Annexure-3Z) had communicated to

Ministry of Coal, Mines and Parliamentary Affairs regarding the coal issues faced by

APGENCO .

APGENCO had entered into a MoU with MCL for supply of 3.60 million tonnes of

raw coal through road mode Washery circuit. The transportation of raw coal from

mines is being carried out by their Washery operator M/s. Spectrum Coal and Power

Limited. APGENCO is facing severe constraints in lifting of raw coal allotted through

road mode, mines from Balaram OCP, Hingula OCP &Bharatpur OCP

Considering that there is severe shortage of coal at APGENCO Thermal plants,

APGENCO had requested Joint Secretary-CPD, MoC to kindly give necessary

directions to MCL for not considering the referred quantities as deemed delivery and

permit dispatch of the same in future as raw coal directly to APGENCO by all rail

Route.

In the Meeting, APGENCO informed that vide letter dated 28.11.2019(Annexure-

3AA)MCL had informed that allocation of coal for the month of December shall be

restricted to trigger level against the Monthly Scheduled Quantity. Accordingly the

railway program submitted by APGENCO for the month of December 2019 as per

MSQ is endorsed by MCL by reducing the rakes as follows:

SI No Station MSQ Trigger Level

1 VTPS I, II & III 100 % 90 % of MSQ

2 VTPS IV 95 % 75 % of MSQ

3 RTPP-IV 95 % 75 of MSQ

APGENCO had requested MCL to supply MSQ without restricting to minimum

commitment level. APGENCO had furnished the details of coal issues which is at

Annexure-3AB

3.53 Grant of MTOA to M/s IL & FS Tamil Nadu Power Company Limited for transfer

of 330 MW power to TANGEDCO

CTU-Planning vide letter dated 06.08.2019(Annexure-3AC) had intimated that

MTOA of 300 MW was granted(from 01.12.2019 to 31.05.2020) with existing

transmission system(IL & FS is connected to 400 kV Nagipatanam PS-inter

connection of TANTRANSCO with ISTS system).


Subsequently CTU Planning vide letter dated 28.11.2019(Annexure-3AD) had

informed that MTOA agreement had been signed between M/s Powergrid& M/s IL &

FS on 05.09.2019.

3.54 Intimation for commissioning of 50.2 MW Wind Generator

Betam Wind Energy Private Limited vide letter dated 14.11.2019(Annexure-3AE)

had intimated that 50.2 MW(SECI Tranche-III) Wind power project(Tuticorin District

of Tamil Nadu) will be ready for commissioning on 21.11.2019. Evacuation of power

from this project will be through Tuticorin PGCIL GIS PS(400/230 kV) at 230 kV

level.

3.55 Communicating the written instructions to Solar/Wind Generators

SRLDC vide letter dated 06.08.2019 had issued directions provisioned under Section

29(1) of the EA in respect of RE scheduling/curtailment. Any curtailment along-with

reason was to be made known to RE generator/SRLDC in writing and through

SLDCs website.

All the SLDCs were requested to furnish the daily reports on RE curtailment to

SRLDC/SRPC. The curtailment details needed to be uploaded on the website also.

3.56 TTC assessment considering temperature dependent rating of lines/terminal

equipment

The information received from all the states had been forwarded to NLDC/NPC

(CEA) for further needful action. SRLDC was requested to follow up with NLDC.

3.57 Communication Audit

All the concerned entities are requested to comply to audit observations.

Readiness/preparedness for Audit to be ensured by the concerned State/PGCIL.

SRPC informed that the Communication Audit for 2019-20 in compliance to CERC

Regulations would be carried out in April 2020 and all the utilities needed to

maintain the data in the requisite format.

3.58 Flexibilization of Thermal Plants: Units identified by APGENCO

TSGENCO had informed that they have identified KTPS Stage II - Unit 11 (500

MW) for conducting pilot test for flexible operation.

APGENCO had informed that BHEL was to revert back on implementation/pilot

tests of Rayalseema Unit I for flexible operation.

3.59 Ramp Rates, technical minimum & startup from hot/warm/cold

All ISGS stations were requested to give ramp of 0.67%/min in line with

the SRPC decision.

All the SLDCs were requested to ensure ramps of at least 0.67%/min in

line with the SRPC decision for the state generators.


All the entities were requested to take action in respect of ramp rates,

technical minimum, start up from hot, warm and cold condition as discussed in

the SRPC meeting (noted in the special meeting).

POSOCO had pointed out that enhancing of the ramp rates would result in

further savings in the SCED optimization.

3.60 RE Generators for Reactive Compensation & High Voltage

All the states were again requested to kindly examine and ensure voltage based

MVAR interchange for RE generators.


KPTCL- KERC had raised some queries. KEGC review panel had

discussed the queries.

KSEBL: Public hearing was held on 29th October 2019 at

Thiruvanthapuram. Public hearing was held at Kochialso(only w.r.t RE).

Based on all the inputs from these hearings and comments received from

various stake holders final GRIDCODE would be notified shortly.

TSTRANSCO: The charges are yet to be notified by TSERC. TSERC had

started functioning.

3.61 Monitoring of scheme funded from PSDF

All the states/entities were requested to kindly furnish the updated status in a time

bound manner.

A review meeting was convened on 25.11.2019 by NLDC/NPC at SRPC Bengaluru.

Minutes of the Meeting is awaited.

Subsequently SRLDC vide letter dated 18.12.2019(Annexure-3AF) had requested

all the entities to furnish the status of PSDF schemes which is to be furnished to

MoP. A VC in this regard is convened on 26.12.2019.

3.62 VC Facility at SLDC

Puducherry had informed that VC facility will be commissioned by March 2020.

3.63 Certification of Inter-state and Intra-state lines in PoC

All SLDCs were requested to communicate the outage and availability computations

for the applicable lines within one week after completion of month to SRLDC. SRLDC

would communicate the details by 3rd week. SRPC would issue the certificate by

month end.

SRPC had requested all states to furnish the availability calculations as a whole

(single availability factor) for entire AC System.

3.64 PSS Tuning of generators

A Meeting to discuss the submitted reports and to discuss the status of schedule of

PSS tuning/SRT was held on 14.11.2019. Minutes of the Meeting is available at SRPC

website. All concerned are requested to take action as per the Minutes of the Meeting.


Non representation of NTPC, KSEBL, IL & FS, SEL, MEL, SEIL, LANCO, UPCL etc

were noted with serious concern, Communication in this regard to the concerned is at

Annexure -3AG

3.65 Compliance of CEA Regulations for Grid connectivity of Renewable Energy

Sources

The following is the updated status on RE SCADA availability as noted in the 162nd

Meeting of OCC:

State SCADA availability as on

30.11.2019 Mapped Vs I/C

Remarks

AP Wind: 4079/3992MW (98%)

Solar: 3233/2970 MW (92%)

Total: 7312/6962 MW (95%)

Pending SCADA availability was

for RE connected distribution level

and for which action had been

taken for compliance.

TS Wind: 100.8/100.8 MW (100%)

Solar: 3495/3475 MW (99%)

Total: 3595/3575 MW (99%)

Action for balance SCADA

availability at 33 kV and below was

being followed up and notices had

been issued.

KA Wind: 4795/4775 MW (99.6%)

Solar: 6404/5851 MW (91%)

Total: 11199/10626 MW (95%)

KE Wind: 70/27 MW (38%)

Solar: 95/87 MW (92%)

Total: 165/114 MW (69%)

TN Wind: 9196/8768 MW (95%)

Solar: 3837/648 MW (17%)

Total: 13032/9416 MW (72%)

SR Wind: 18241/17663 MW (97%)

Solar: 17063/13030 MW (76%)

Total: 35304/30692MW (87%)

3.66 High voltages in SR/Frequent switching of lines / Bus reactors/ MVAR

interchange of generators

SRPC had analyzed the nodes of high voltage coupled with MVAR injection during

July 2019 to November 2019 and the following was observed:

Nodes with MVAR injection during V > 103%

AP KAR TN TS

Chittoor Madhugiri Tirunelveli Maheshwaram

Sattenapalli Nelamangala Karaikudi Hyderabad

Vemagiri Raichur Alamathy Mehaboobnagar

Hindupur Guttur Pugalur Dichipally


Vijayawada Munirabad S V Chatram Warangal

Kurnool Hoody Kalavinthapattu Malkaram

Gazuwaka

Gajwel

Khammam

Shankarpalli

All entities are requested to kindly take appropriate action.

3.67 Updates on newly commissioned /Upcoming Generating Stations

In the 157th OCC Meeting it was noted with concern that no timely information is

furnished by entities regarding the upcoming generating stations. The information

is being sought by higher bodies like CEA/MoP etc.

All the States and ISG Stations were requested to furnish the progress of

works of upcoming generating stations with expected date of

commissioning. It was also noted that commissioning of new units also to be

intimated in time. Declaration of COD letter from SLDC was required to be

submitted to CEA, Fuel Management Division for purpose of coal linkages etc.

3.68 Meeting to discuss the issue of delay in installation of bus reactors by NPCIL at

Kaiga and Kudankulam NPP

PSPA-II division, CEA had convened a meeting on 22.11.2019 to discuss the

following issues. Minutes of the Meeting are at Annexure-3AH.

The following were noted in the Minutes:

The KKNPP reactor is likely to be put back into service by March, 2020.

NPCIL representative informed that tender had been floated for the work. Bids have

been received and are under evaluation. The work is likely to be awarded by March,

2020.

3.69 Criteria to categorize the Generating units/Transmission elements under

prolonged outage

The following were agreed for categorization

Generating Units: Planned outage: After 5 days of scheduled revival date

: Forced outage: After 5 days of outage.

Transmission elements: Planned outage: After 2 days of scheduled revival date.

Forced outage: After 2 days of outage

SRLDC informed that the transmission elements would be listed out based on the

IEGC Clause 5.2(e) as below:

“Any prolonged outage of power system elements of any User/CTU/STU, which is

causing or likely to cause danger to the grid or sub-optimal operation of the grid,

shall regularly be monitored by RLDC. RLDC shall report such outages to RPC.


RPC shall finalize action plan and give instructions to restore such elements in a

specified time period”

RTPS- Prolonged outage(Unit II & III)

RSTPS vide letter dated 27.11.2019(Annexure-3AI) had furnished the details

regarding the prolonged outage of RSTPS Unit II & III.

NCTPS Stage – I vide letter dated 02.12.2019(Annexure-3AJ) had furnished theb

reason for prolonged outage of NCTPS Stage I.

3.70 United Capacity of Priyadarsini Jurala HEP

TSTRANSCO vide letter dated 28.11.2019(Annexure-3AK) had clarified(reply to

CEA letter dated 06.11.2019) that total installed capacity of Priyadarsini Jurala HEP

is 234 MW and there is a joint PPA between Telangana and Karnataka DISCOMs,

accordingly the total energy is being scheduled in the ratio of 50:50 on mutual

understanding basis.

The forum noted the above.

4. Outage Proposals/LGBR

Outages was discussed and processed through VC on 06.112.2019.

Review on Annual Outage Planning for the year 2020-21

Annual Maintenance Schedules furnished by Generating Units have been

analysed as per the guidelines finalized in the OCC Forums and Kukde

Committee’s recommendation.

The suggestions / observations, had been communicated to all concerned vide

letter dated 11.12.2019(Annexure-4A) and also posted in OCC Group(along

with detailed Report of Analysis on the Maintenance Schedule in power point

presentation (ppt)).

It is requested that these outages may kindly be reviewed and rescheduled

wherever required. The revised schedule of maintenance may please be

communicated to this office.

5. TTC/ATC computations

All states were requested to furnish PSSE base case for April 2020.

SRLDC & SRPC had pointed out that the demand being furnished for POC, ATC

and LGB should be in synch with each other. Different values should not be

furnished for different requirements. Node wise data should be as per the demand

which is likely to be met from various sources keeping in view MOD etc.

6. Availability and Requirement

Availability and requirement for the period from December 2019 to April 2020 is

given at Annexure-6A.

7. REVIEW OF THE POWER SUPPLY POSITION

Grid Highlights


Frequency remained within IEGC range during November 2019 (49.90 - 50.05

Hz) for 73.39 % of time. Average frequency for the month was 50.01 Hz.

Frequency remained below 49.90 Hz for 4.06 % of time during November 2019.

Frequency remained above 50.05 Hz for 22.55 % of time during November

2019.

02 MW (Wind) were added to Andhra Pradesh Installed Capacity (Private

Sector).

02 MW (Solar) were added to Andhra Pradesh Installed Capacity (Private

Sector)

10 MW (Solar) were added to Telangana Installed Capacity (Private Sector).

86.5 MW (Solar) were added to Karnataka Installed Capacity (Private Sector).

1.5 MW (Wind) were added to Tamil Nadu Installed Capacity (Private Sector).

Andhra Pradesh, Telangana, Karnataka, Kerala & Tamil Nadu imported 307 MU,

604 MU, 277 MU,10 MU & 1054 MU respectively intra-regionally through

bilateral exchanges.

Andhra Pradesh, Telangana, Karnataka & Tamil Nadu exported 981 MU, 17

MU, 280 MU & 976 MU respectively intra-regionally through bilateral exchanges.

Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil Nadu

& Puducherry imported 299 MU, 287 MU, 115 MU, 42 MU & 388 MU

respectively through Power Exchange.

Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil Nadu,

TPCIL, IL & FS & SEIL P II exported 20 MU, 66 MU, 278 MU, 1.49 MU, 10 MU,

105 MU, 40 MU, 1.4 MU & 153 MU respectively through Power Exchange.

220 kV SS Ananthapuram S/S was commissioned on 08.11.2019 by

APTRANSCO with augmented capacity of 1x160+2x100 MVA(Earlier 3x100

MVA)

At 400/220kV Janagaon SS 2x500 (MVA) capacity (PTR no 2 & 3) were

commissioned on 01.11.2019 & 13.11.2019 by TSTRANSCO.

220 kV lines(ckts I & III) of ckt kM 3 from Jagatyal-Nirmal(LILOs of RSS-Nirmal

to 220 kV Jagatyal S/S) was commissioned on 20.11.2019 by TSTRANSCO.

220 kV lines(ckts IV & III) of ckt kM 3 from Jagatyal-Vemnur(LILOs of Memnur-

Nirmal to 220 kV Jagatyal S/S) was commissioned on 20.11.2019 by

TSTRANSCO.

8. High frequency

It was noted that the Regional Grid had operated above IEGC range i.e.50.05 Hz for

22.54 %of the time. It was also noted that the frequency on some of the days was

higher for considerable duration of times. (Refer Table-IV of Appendix)

SRLDC informed that maximum frequency had touched 50.26 Hz at 22:01 hours of

26thNovember2019. (Graph at Annexure-8A).


SRLDC presented the underdrawal of states when frequency was above 50.05 Hz.

(Annexure-8B). The maximum underdrawals touched by States during November

2019 also was presented. (Refer Table V of Appendix)

Constituents were advised to kindly avoid uneconomic operation at high frequencies.

SRPC requested all the constituents that action needs be taken to adhere to the

schedule since it had commercial/operational impacts even for underdrawal.

8.1 Pump mode operation

It was noted that there was no consumption in pump mode at N’Sagar&Srisailam.

Kadamparai consumption in pump mode was 53.355 MU during the month of

November 2019.

9. Low Frequency

It was noted that the frequency of grid operation was at times lower than IEGC range.

Grid had operated below IEGC range i.e. 49.90 Hz for 4.07%of time during the month

(Refer Table-VI of Appendix).

SRLDC informed that minimum frequency touched 49.66 Hz at 06:21hrs on

18thNovember 2019. Drawals of Southern Regional states at that instance were also

projected (Graph at Annexure-9A).

Overdrawal by SR constituents at frequency less than 49.90 Hz (Annexure-9B) was

presented by SRLDC. The maximum over-drawals touched by States also was

presented.(Refer Table VII of Appendix).

10. VOLTAGE PROFILE

10.1 Low voltage

In the meeting, it was noted that low voltage had been observed at few nodes in

November 2019. It was observed that voltage profile had been improved compared to

last month.

Details of Capacitors installed during November 2019 are at Annexure-10A. Details of

the healthy/faulty capacitors to be furnished.

10.2 High Voltage

SRLDC informed that there werehigh voltages observed at number of 400kV / 765

kV nodes. (Refer Table VIII of Appendix)

10.2.1 Status review of GT Tap positions

GT tap Positions – GT taps yet to be changed as per recommendation (Refer

Table-IX of Appendix)

10.2.2 Status review of Bus/Line Reactors, Line Reactors and STATCOM

Status of implementation of Bus / Line Reactors approved in the Standing

Committee / SRPC by the SR constituents is furnished at Table X of Appendix.


In view of very high voltage at some nodes, it was emphasized that urgent action

needs to be taken to commission reactors as per committed dates.

10.2.3 Reactive Power Planning

Status update on capacitor installation is given at Table XI of Appendix.

SRPC & SRLDC requested all the states to come up with updated information like

till date commissioned, plan for new commissioning, quantum in working condition,

action taken to rectify/replace faulty capacitors, etc.

10.2.4 MVAR interchange/Testing

MVAR interchange meeting was convened on 26.09.2018. Minutes of the Meeting

are available at SRPC website. Necessary action as per minutes to be taken.

The following were planned w.r.t BSRP & MVAR testing:

TS: BSRP on 11.12.2019 at Kakatiya

AP: BSRP on 20.12.2019 and MVAR testing on 19.12.2019 at Rayalseema

KER: BSRP likely on 17.01.2020 at Kalamassery

TN and KAR: would be finalized.

11. Network Protection/Security issues

11.1 U/F &df/dt Relays Schemes

Implementation of SRPC recommended quantum

It was noted that all States had implemented AUFR and df/dt schemes fully.

In the Meeting, SRLDC presented the load relief realized as a percentage of AUFR

quantum declared in the identified feeders during the month of November 2019 as

follows: (Detailed Presentation is at Annexure-11A)

AP: 71 %, TS: 78%, KAR: 41%, KER: 69%, TN: 66%, Pudu: 89% &SR: 60%.

In the Meeting, KPTCL informed that they were looking into the relief issue which was

around 42 %(as per SRLDC). AS per KPTCL RT wing the relief is around 62 % and

the data had been forwarded to SRLDC.

SRLDC agreed to review the relief in this regard.

SRLDC informed that validated list of feeders had been shared in google spread

sheet. Any change in details of feeders to be uploaded in google spread sheet with the

date of updation.

11.2 SCADA mapping of feeders of AUFR &df/dt schemes

Status update as per SRLDC after validation of all the States is as follows:

State SCADA

mapped %

Status

AP 64 ATRANSCO informed that 132 RTUs have been

procured and would be commissioned by October


2019(UFR and df/dt mapping and visibility would

improve).

TS 77 Out of 29 RTUs 28 is commissioned. Pending 1

RTU will be commissioned by this month end.

Mapping is to be carried out in coordination with

SRLDC for some of the RTUs.(communication

issues existing)

KAR 100

KER 100

TN 88 All the RTUs commissioned(28 RTUs )

Pudu 92 The points pertaining to the feeders identified for

UFR tripping in the new RTUs have already been

mapped in the SCADA system and the same will be

communicated to SRLDC for including in the list.

SR 94

12 Automatic Demand Side Management Scheme (Petition No. 250/MP/2012) &

GSES (Petition No. 265/MP/2012)

It was noted that all states had implemented revised ADMS logic. (Alarm at 49.90

Hz and below for 10 minutes, Trip at 49.85 Hz, Min DSM limit for 15 Minutes)

There was no ADMS incidence during the month of November2019.

All states were requested to identify additional feeders which could be tripped

through SCADA rotationally with load relief of (OD-Max dev limit). Any loads

tripped under ADMS should be brought back only under the directions of SLDC

keeping in view the frequency, overdrawal etc.

12.1 Grouping of loads (IEGC clause 5.4.2 (e))

As per IEGC, to maintain the frequency within stipulated band and also to ensure

network security, the interruptible loads were to be arranged in four groups of

loads, This was for the purpose of scheduled power cuts/load shedding, loads for

unscheduled load shedding, loads to be shed through UF relays, df/dt relays and

loads to be shed under any SPS scheme. These loads are to be grouped in such

a manner that there is no overlapping between different groups of loads.

This issue was noted for compliance by the concerned utilities.

12.2 LVRT Implementation

Hon’ble CERC had passed Order in respect of Petition No. 420/MP/2014 on

05.01.2016. Five Special Meetings were conducted at SRPC on 05.02.2016,

18.04.2016, 05.07.2016, 25.10.2017 and 23.04.2018 (Meeting minutes are

available at SRPC website).


Quarterly reports of the SR constituents jointly validated by SRLDC/SRPC

Secretariat are being communicated to Hon’ble CERC in regard to monitoring of

the installation and performance of LVRT installed on existing WTGs as per the

directives of Hon’ble CERC.

CEA had issued CEA (Technical Standards for connectivity to the Grid)

(Amendment) Regulations, 2019 dated 06.02.2019 which are available at CEA

website.

Therefore all the SLDCS were requested to furnish the LVRT status(33 kV &

above) for the WTGs being commissioned from 06.08.2019.

13 Emergency Restoration System (ERS)

The status was updated in the 35th TCC Meeting held on 11.07.2019 and is at Table

IV.

14 SCADA AND COMMUNICATION

All entities were requested to bring any specific/recurring SCADA/Communication

related issues to the notice of OCC forum.

All states were requested to furnish the SCADA mapping updates for the RE and

at the pooling stations (as per the format of CEA) – the details to be

communicated wherever pending.

15 Black Start Procedure

In case of postponement or non-conducting of mock drill exercise then the same

must be intimated to SRLDC along with reasons.

Black Start Mock Drill

i) Details of Mock drills conducted in November2019 to be furnished.

ii) Mock drills scheduled for December 2019 and from January 2020 to June 2020

to be furnished.

iii) Point to point mock exercise for black start by all constituents.

iv) TSTRANSCO had informed that TSGENCO was planning to procure DG set of

appropriate capacity for Jurala HEP.

16 RGMO/FGMO

16.1 RGMO response had been deliberated in various Special/OCC/TCC/SRPC

meetings. Inadequate response was an area of serious concern and there was no

noticeable improvement.


Inadequate response was needed to be taken up by SLDCs with respective SERCs in line with Hon’ble CERC Orders in respect of Petition No. 84/MP/2015 and 302/MP/2013.


Non-performance of generators under SRLDC control should be taken up by SRLDC with the respective generators.

It was noted that some of the generators were disabling RGMO without informing /concurrence from SLDC/SRLDC thus not complying with IEGC provisions.

SLDCs had been suggested to ensure that schedules are restricted to normative ex-bus generation. Generators had been suggested not to resort to VWO and maintain generation as per the coal quality/ system/machine parameters and keep margins for RGMO / FGMO with MI at all instances.

Need for testing of RGMO response at the field emerged since response was not meeting the requirements fully.

As per 5th Amendment to IEGC, gas stations above 50 MW Installed Capacity were also to come under RGMO/FGMO Operation w.e.f. 1st October 2017. Generators/SLDCs had been requested to take necessary action to comply with this Amendment.

FRC computations were also to be undertaken by the SLDCs in line with approved methodology of CERC.

All the generators had been requested by SRPC/TCC to improve their primary response which was becoming more significant with high RE ingress. SLDCs needed to sincerely peruse the performance of their generators within their Control Area and take up nonperformance with SERC. For Gas units (> 50 MW) RGMO compliance was required as per IEGC. The performance report of all the units was being communicated by SRLDC to CERC periodically.

16.2 Performance of RGMO is analyzed by SRLDC and presented in the Meeting.

Summary for Southern Region (state-wise details are given in Annexure-16A) for

the incident on 01.11.2019 is given in the Table below:

Incident: Generation loss of approximately 1644 MW (as per SCADA data) in Akal-

Ramgarh generation (Rajasthan) complex occurred at 11:17 hours on 01.11.2019.

Frequency has dropped from 50.02 to 49.90 Hz during the incident.

STATE HYDRO THERMAL TOTAL

Possible Actual Possible Actual Possible Actual %

AP 37.90 3.90 83.55 57.46 121.45 61.36 51%

TS 59.80 17.80 62.18 64.36 121.98 82.16 67%

KAR 59.80 17.80 45.55 9.40 105.35 27.20 26%

KER 20.70 9.00 0.00 0.00 20.70 9.00 43%

TN 0.00 0.00 63.40 20.00 63.40 20.00 32%

CGS 0.00 0.00 298.60 190.34 298.60 190.34 64%

SR 178.20 48.50 553.28 341.56 731.48 390.06 53%


AP: Response was comparatively better. Krishnapatnam response was partial.

Rayalseema units didn’t respond. APSLDC informed that there is a mismatch in the

data. APGENCO was requested to give the revised data. Subsequently APGENCO

had furnished the revised response and the same had been incorporated by SRLDC.

TS: TSTRANSCO informed that response of Hydro was less since Srisailam and

N’sagar didn’t response was less due to net head. Thermal all the running units had

responded.

KAR: Both Hydro &Thermal had shown poor response. KAR SLDC informed that

only Unit -3 & 8 of RTPS were in operation at Raichur TPS. Yeramarus was not in

operation. Some data discrepancy was observed in the data. KPCL was requested to

furnish the data to SRLDC.

KER: Only Kuttiyadi& LP Extn responded.

TN: Only NCTPS Stage II(Thermal) &Kunda II(Hydro) responded.

ISGS: Ramagudam(except Ramagundam Unit-VII)&Simhadri units responded. Kudgi

units were out. NLCIL units not responded. NTECL units were out. Talcher data

issue was there.

MPPs: CEPL one unit responded partially, other unit didn’t respond. SEIL: Partial

response. IL & FS Units: Partial response.

After deliberations:

All concerned are requested to analyse and submit revised figures where ever

mismatch is observed.

No response/partial response/reverse response etc to be taken up with

concerned generators by SLDCs and revert back with the reasons.

16.3 Extension of RGMO status point to SLDC (Refer Table-XVI of Appendix).

16.4 KPTCL had convened a Meeting of the RGMO/FGMO, MVAR interchange, AGC and

Ramp Rates on 13.11.2019 at SLDC, KPTCL in which UPCL & JSWL had also

participated. Minutes of the Meeting issued vide letter dated 19.12.2019 is at

Annexure-16B

17 Upcoming Generating Stations

Status update of Central sector and State Sector Upcoming generating stations is

given at Table XIII of Appendix.

SRPC stated that declaration of COD letter from SLDC was required to be

submitted to CEA, Fuel Management Division for purpose of coal linkages etc.

SRLDC stated that new ISTS connected units should come out with detailed

metering schemes for various units commissioning schedule, at least one year

prior to synchronization. The scheme needs to be discussed and finalized in the

Commercial Sub Committee.

18 Wind/solar Generation


SRLDC presented the day-wise Wind Generation pattern in Andhra Pradesh,

Karnataka & Tamil Nadu during the period 1st November 2019 to 30th November

2019.

Wind generation in Andhra Pradesh had varied between 17.57MU (28.11.2019) to

0.84 MU (06.11.2019). Wind generation in Karnataka had varied between

17.60MU (26.11.2019) to 2.4 MU (02.11.2019). Wind generation in Tamil Nadu

had varied between 18.62MU (26.11.2019) to 2.4 MU (02.11.2019) (Annexure-

18A).

SRLDC presented the day-wise Solar Generation pattern in Andhra Pradesh,

Telangana, Karnataka & Tamil Nadu during the period 1st November 2019 to 30th

November2019. Solar generation in Andhra Pradesh had varied between

14.01MU (11.11.2019) to 6.48 MU (15.11.2019). Solar generation in Telangana

had varied between 19.55MU (13.11.2019) to 10.22 MU (03.11.2019). Solar

generation in Karnataka had varied between 45.20MU (25.11.2019) to 24.43 MU

(01.11.2019). Solar generation in Tamil Nadu had varied between 14.05MU

(27.11.2019) to 06.32 MU (30.11.2019). (Annexure-18B).

19 Vote of Thanks

Member Secretary, SRPC thanked all the participants for their valuable inputs

during the deliberations in the Meeting.

20 Date & Venue of the next Meeting

The schedule for the next Meeting of OCC is as follows:

Meeting : 163rd OCC of SRPC

Date : 09.01.2020 (Thursday)

Time : 10:00 Hours

Venue : SRPC, Bengaluru

TABLE – I Number of Outages approved V/s Availed

Status of shut down availed vs shut down approved as furnished by states is as below:

State/Utility AP TS KAR KER TN SR I SR II

No of shut downs approved

49 25 9 11 62 36

37

No of shut downs carried out as per schedule

44 17 4 11 31 19 17

No of shut downs deferred

05 08 5 0 31 09 20


SR I informed that 4 shutdowns were deferred by SRLDC. TABLE – II

Status of shut down availed against shut down approved as furnished by SRLDC is as

below:

AP KAR CEPL

KER NPCIL

TN TS NLC

NTPC

SR I

SR II

SR

90 50 0 100 0 50 68 60 100 68 46 63

TABLE III

PSS TUNING SRT of following units had been analyzed upto 6th Meeting of PSS and necessary action

had to be taken as per Recommendations.

Entity Generating Stations/Units

APGENCO Rayalaseema TPS U1 to U5[U1 to U5: 13-01-19]; VTPS U1 to U4 & U7[U1 to U4 & U7: 13-01-19]; SDSPP U1&U2; Srisailam RB HEP U1 to U7[U1 to U7: Between 28-09-19 & 01-10-19]; Lower Sileru HEP U1[U1: 13-12-19]

AP IPP HNPCL U1 & U2

TSGENCO Nagarjunasagar HEP U1 to U8; Srisailam LB HEP U1 to U6; Kakatiya TPS U1[U1: 24-01-19] & U2[U2: 06-07-19]; Kothagudem TPS U7 to U11 [U9 to U11: 22-12-18]; Singareni Collieries U1 & U2

KPCL Raichur TPS U1 to U8 [U1:18-06-19, U2: 22-8-19, U3: 17-06-19, U5: 24-11-18, U6 & U7: 17-12-18, U8: 19-11-18]; BTPS U1 to U3 [U1: 15-10-18, U2: 31-12-18, U3: 26-08-19]; Varahi UGPH HEP U1 to U4 [U1&U2: 23-10-19, U4: 23-10-19]; Nagjheri HEP U1 to U6[U3: 02-06-19]; Sharavathy HEP U1 to U10 [U3: 08-11-19, U5: 09-11-19, U7: 09-11-19, U9: 10-11-19, U10: 11-11-19]

KAR IPPs UPCL U1 & U2 [U1: 04-10-18, U2: 23-10-18] ; JSWEL U1 to U3[ U2 & U3: 21-10-19]

KSEBL

TANGEDCO MTPS St-I U1 to U4 [U3:07-09-19, U4: 09-10-18]; NCTPS St-I U1 to U3; Tuticorin TPS U1 to U5 [U2 & U3: 26-12-19, U4: 28-12-19, U5: 29-12-19] ; NCTPS St-II U1, U2(U2 Report submitted for analysis); Kadamparai HEP U1 & U2, Mettur St-III

TN IPPs

CGS NTPC- Ramagundam U3, U4, U5, U6[U5,U6: Report submitted for analysis] & U7 [U7: 19-10-19]; NTPC-Simhadri U1 to U4 [U1: 14-03-19, U2 to U4: 18-03-19]; NTPC-Talcher STPS St-II U3 & U6 [U3 & U6: 04-06-19] ; NTECL-Vallur TPS U1 to U3 [U1: 09-11-19, U2: 08-11-19, U3: 07-11-19]; NLC-Neyveli TPS II U1 to U7 [U4 to U7: 23-12-19]; NPCIL-KGS

Percentage of shut down carried out

90 68 50

100 50 68 46


U2, U4( Full Report not submitted for U4); NPCIL-KKNPP U1 & U2 [U1: 01-02-19]; NLC-Neyveli TPS II Exp. U1 & U2; (NLC & TN JV) NTPL U1; NTPC-Kudgi U1 & U2 [U1: 10-09-19] NTPC-Kudgi U3;(report submitted)

ISTS connected IPPs

TPCIL U1 & U2 [U1: 24-12-19]; Coastal Energen U1 & U2 [U2:16-08-19]; IL & FS U1 & U2 [U1: 12-04-18, U2: Report Submitted for analysis]

For the following Units, PSS is to be tuned and SRT to be carried out / information not available.

Entity Generating Stations/Units

APGENCO VTPS U5 & U6; Lower Sileru HEP U2 to U4

AP IPPs

KPCL Yeramarus TPP

KAR IPPs JSWEL U4

KSEBL Idukki HEP U1 to U6

TANGEDCO Kadamparai HEP U3 & U4

TN IPPs STCMS

CGS NTPC-Ramagundam U1&U2; NLC-Neyveli TPS I Exp. U1 & U2 (SRT reports not submitted) [U1: 12-10-18, U2: 05-11-18]; NTPC-Talcher STPS St-II U4, U5; NPCIL- KGS U1, U3 [U3: 19-4-10]; NPCIL-MAPS U1 & U2 [U1: 11-01-09, U2: 03-08-06]

ISTS connected IPPs

Lanco Stage II & III; SGPL-Nellore; SEL U1 to U4; MEL U1 & U2

Note: In the above two tables the date [in “dd-mm-yy” format] mentioned in the braces represents 3 years completion of PSS tuning of the AVR of the generating units upto December 2019. PSS tuning is to be again carried out for these units: Table -IV: Frequency was higher than 50.2 Hz .

Date

Percentage of time of Frequency

50.05 Hz &<50.2 Hz More than 50.2 Hz

01-11-2019 10.96 0.19

06-11-2019 23.37 0.00

07-11-2019 38.68 0.49

08-11-2019 27.28 0.23

11-11-2019 24.64 0.00

15-11-2019 25.38 0.16

16-11-2019 24.33 0.00

20-11-2019 14.48 0.19

21-11-2019 31.27 0.00

23-11-2019 26.42 0.07

24-11-2019 29.72 0.44


26-11-2019 32.37 0.43

27-11-2019 33.39 0.00

28-11-2019 29.53 0.35

30-11-2019 18.09 0.10

High frequency excursions w.r.t. 5.2 (j) of IEGC during load change over and remedial measures to arrest such instances

All SLDCs/constituents were again requested to kindly adhere to the Regulations

in place. Following remedial measures to arrest high frequency operation in the

Grid were noted:-

Implementation of staggered load changeover by the constituents/DISCOMs

Moderating own generation

Restricted Governor Mode of Operation of all eligible machines to be in place

Proper load management to prevent the sharp rise in frequency

ADMS healthiness

Exploring the possibility of running the units in pump mode

Planned and advance intimation for surrender of ISGS

Reduction in purchases/MTOA/STOA transactions

Table V: The maximum under drawal touched by States are as follows:

State MW Duration Date

AP 632 16 26.11.2019

TS 646 15 01.11.2019

KAR 757 22 13.11.2019

KER 201 01 06.11.2019

TN 785 12 29.11.2019

Table VI : Frequency less than 49.90 Hz for significant duration

Date Percentage of time of frequency

<49.2

Hz

49.2 Hz

&

< 49.5 Hz

49.5 Hz &

< 49.7 Hz

49.7 Hz

&<

49.8 Hz

49.8 Hz

&

< 49.9

Hz

01-11-2019 0.00 0.00 0.19 1.19 10.65

02-11-2019 0.00 0.00 0.00 0.27 6.41

04-11-2019 0.00 0.00 0.00 0.39 9.25

05-11-2019 0.00 0.00 0.00 1.08 7.65

13-11-2019 0.00 0.00 0.00 0.05 2.77

16-11-2019 0.00 0.00 0.00 0.21 6.23

18-11-2019 0.00 0.00 0.21 1.38 7.10


Table VII: The Maximum over drawal touched by States are as follows

State MW Duration Date

AP 657 15 14.11.2019

TS 635 06 28.11.2019

KAR 800 22 25.11.2019

KER 160 02 22.11.2019

TN 791 47 20.11.2019

Table: VIII: High Voltage Nodes

19-11-2019 0.00 0.00 0.00 0.45 5.98

20-11-2019 0.00 0.00 0.22 0.93 5.64

25-11-2019 0.00 0.00 0.00 0.50 4.84

STATION

MAX VOLTAGE IN KV

AVERAGE DURATION IN

MINUTES PER DAY WHEN

V > 420 KV/ V > 780KV

Vijayawada 423 98

N’ Sagar 426 530

Hyderabad 424 191

Gooty 426 434

Kurnool 425 366

Khammam 432 646

Srisailam 431 661

Hiriyur 432 667

Guttur 431 366

Raichur 426 376


Table-IX - GT Tap: Recommended/Implemented

Station

Unit Present Tap

And

Correspondi

ng

Voltage(In

kV)

Recommen

ded Tap

And

Correspond

ing

Voltage(In

kV)

Remarks

ISTS connected Generators:

Kaiga I 1 & 2 6 & 229.125 7 & 223.25 MVAR interchange as

Kaiga 430 308

Narendra 436 712

Chennai 427 223

Pugalur 430 582

Malkaram 434 1112

Sattenapally 428 535

Almatty 442 1326

Mysore 435 652

Hassan 432 594

Mehboob Nagar 432 889

Tiruvalam 765 803 03

Nizambad 765 812 224


Kaiga II 3 & 4 3 & 409.5 4 & 399 per Special Meeting to

be ensured.

APGENCO/APSLDC

IPPs of AP It is recommended that all IPPS under APSLDC could be advised to

change their Tap position corresponding to voltage level of 400 kV /

220 kV.

KPCL/KAR SLDC

Sharavathi 9 & 10 2 & 231 4 & 220 First GT (9) reached

during October 2017.

Second GT reached

during December 2017.

Unit 10 GT erection

works completed. Tap

change would be carried

out after receiving the

ICTs.

UPCL 1 & 2 4 & 409.5 5 & 400 Observed rotor teeth temperature issues. 2 x 125 MVAR reactors agreed in 39th

SCPSPSR. 41st …… It was suggested that

their MVAR absorption

should be around 50-60

MVAR in case they are

not able to change Tap.

TANGEDCO/TN SLDC

Tuticorin TPS 1,2,3,4 5

8 & 243 230 All the GTs in TTPS are

kept in Tap No. 10.

MTPS St.III 1 6 &

409.5

7 & 399 Provision of Bus Reactor

is being carried out by

GCC/TANTRANSCO,

Salem. After the provision

of Bus Reactor the GT

Tap will be increased to

7(399 kV) from Tap-

Reactor bay works were

completed at present and

allotment of reactor is

awaited.

Table –X- Reactor Installation Status

As per of 160th OCC SRPC

Entity Bus Name Status REMARKS

KPTCL Hoody Ready for 160th OCC:


commissioning. November 2019

Nelamangala Commissioned on 19.10.2019

Entity Bus Name Capacity in MVAR

Approved in

Type Remarks

PGCIL

Yelahanka 2 x 63 40th SC Bus Award placed in May 2018.

Thiruvalam 765 kV

2 x 240 42nd SC Both the reactors CoD from 07.06.2019

Pavagada 2 x 125 42nd SC 2nd reactor CoD from 03.06.2019

Nellore (PG) 2 x 50

42nd SC

Line to Bus

Both the reactors CoD from 24.05.2018.

Hosur 63 to 125

42nd SC/1st SRSCT

Bus

Madhugiri 63 to 125

42nd SC/1st SRSCT

Bus

Dharmapuri 125 42nd SC/1st SRSCT

Bus

Hiriyur 125 42nd SC/1st SRSCT

Bus

Pugalur 125 42nd SC/1st SRSCT

Bus

Pugalur HVDC

2 x 125 42nd SC/1st SRSCT

Bus

Karur PS 2x125 2nd SRSCT

Bus

Munirabad PS

2 x 125 2nd SRSCT

Bus

Kurnool III PS

330 (765kV)

2nd SRSCT

Bus

Kurnool III PS

125 2nd SRSCT

Bus

Kurnool III PS

240 (765 kV)

2nd SRSCT

Line

Maheswram (PG)

240 (765 kV)

2nd SRSCT

Line


Ananthpuram PS

2 x 125 2nd SRSCT

Bus

Gadag PS 125 2nd SRSCT

Bus

Bidar PS

240 (765 kV)

2nd SRSCT

Bus

125 2nd SRSCT

Bus

Dharmapuri (Salem New)

240 (765 kV)

2nd SRSCT

Bus

Madhugiri (Tumkur)

240 (765 kV)

2nd SRSCT

Bus

Tuticorin PS 330 (765 kV)

2nd SRSCT

Line

Dharmapuri (Salem New) on Tuticorin

330(765 kV)

2nd SRSCT

Line

Dharmapuri (Salem New) on Madhugiri

330(765 kV)

2nd SRSCT

Line

Madhugiri (Tumkur) on Narendra New

330(765 kV)

2nd SRSCT

Line

Narendra New on Madhugiri

330(765 kV)

2nd SRSCT

Line

Tuticorin PS, Dharmapuri (Salem New), Madhugiri (Tumkur) and Narendra New

2nd SRSCT

Existing Line to bus

APTRANSCO

Chittoor 125 39th SC Bus 35th TCC/160th OCC By Dec 2019

Vijayawada 125 39th SC 35th TCC: By Dec 2019

Uravakonda-2

125 42nd SC Bus 35th TCC/160th OCC: By Dec 2019

Uravakonda 80 42nd SC Charged on


-1 12.01.2016

Jammalmadugu

80 35th TCC: Commissioned on 30.06 2019

Sattenapalli 125 42nd SC 35th TCC/160th OCC: By Dec 2019

Aspiri 2 x 125 Bus Commissioned on 28.11.2019

Mylavaram (Kadapa)

125 Bus

Talaricheruvu (Ananthapuram)

125 40th SC Bus Commissioned on 16.05.2019

Rachagunneri

125 42nd SC/1st SRSCT

Bus 35th TCC/160th OCC: By Dec 2019

Hindupur


Bus 160th OCC: By October 2019


Bus 160th OCC: By March 2020

Krishnapattnam

2x80 35th TCC: approved in 2nd SRSCT for charging.

Chilakaluripeta

125 2nd SRSCT

Bus

Guddigudem

125 2nd SRSCT

Bus

Eluru 125 2nd SRSCT

Bus

Kakinada 125 2nd SRSCT

Bus

Thallaya Palem GIS

125 39th SC Bus By December 2019

APGENCO

VTPS Stage IV

125 39th SC Bus 34th TCC: PSDF approval awaited

Polavram HEP

2 x 125 42nd SC Bus 34th TCC: Included in EPC contract

KPTCL

Davanagere 125 39th SC 35th TCC: Commissioned

Talaguppa 125 39th SC 35th TCC: Commissioned

C N Halli 2 x 125 42nd SC/ 1st SRSCT

Bus 35th TCC: Land acquisition under progress.

Jagalur 2 x 125 42nd SC/ 1st

Bus 35th TCC: Work completed with 2x80


SRSCT Bus MVAR reactor.

Yalwar 2 x 125 2nd SRSCT

Bus

Kadakola 2 x 125 2nd SRSCT

Bus

KPCL

Yeramarus 125 42nd SC/ 1st SRSCT

Bus

Bellary 2 x 125 42nd SC/ 1st SRSCT

Bus

KSEBL Wayanad

125 42nd SC/ 1st SRSCT

Bus

34th TCC: KSEBL stated that Wayanad is proposed as switching station in the long term transmission plan of KSEBL. This is envisaged as a part of Areakode - Kasargode 400 kV link. Since reactors are planned as part of 400 kV S/S Kasargode, the same may not be required at Wayanad. KSEBL was suggested to take up this issue in SRSCT.

TANTRANSCO

Almathy 125 39th SC Bus LOA issued on 11.10.2019

Manali 125 39th SC Bus LOA will be issued after obtaining approval from PSDF

Kayathar 125 39th SC Bus LOA issued on 11.10.2019

Kamuthi 2 x 80 39th SC Bus LOA issued on 11.10.2019

Virudhnagar (765 kV)

2 x 330 42nd SC Bus

2 x 330 42nd SC Line

Coimbatore (765 kV)

2 x 240 42nd SC Line

Kayathar 125 42nd SC Bus

Kamuthi 125 42nd SC Bus

Thappagundu

125 42nd SC Bus

Kadaladi 125 42nd SC Bus

Parali 125 42nd SC Bus

Arni 2 x 125 42nd SC Bus

Velalividu 125 1st SRSCT

Bus

Rasipalayam

63 Bus 2018-19

Edayarpalayam

2 x 125 Bus


Vishwanathapuram

2x50 2nd SRSCT

Line

1x125 2nd SRSCT

Bus

TSGENCO KTPP 125 1st SRSCT

Bus

TANTRANSCO/ TANGEDCO

Mettur Stage III S/Y

125 39th SC Bus LOA issued on 11.10.2019

TSTRANSCO

Asupaka 80 42nd SC Bus 35th TCC: 1. Administrative

approval was accorded by TSTRANSCO for installation of Bus/Line Reactors at various sub-stations.

2. Requested SRPC for grant from PSDF for execution of above Reactors and approval is awaited

3. The estimates for the works are under preparation.

Suryapet 125 42nd SC/1st SRSCT

Bus

Rayadurg 125 42nd SC/1st SRSCT

Bus

Kamalapuram


Bus

Narsapur 125 42nd SC/1st SRSCT

Bus

Maheshwaram


Bus

Kethireddypally (Manikonda)


Bus

Jangaon 125 42nd SC/1st SRSCT

Bus

Choutuppal 125 42nd SC/1st SRSCT

Bus

Dindi (2nd Reactor in

place Srisailam LB)

125 1st

SRSCT Bus

Tippapur 125 42nd SC/1st SRSCT

Bus

Yellampalli 125 42nd SC/1st SRSCT

Bus

Yadadri (Damaracherla)

2x125 2nd SRSCT

Bus To be finalized in next SRSCT

NPCIL Kaiga 2 x 125

Bus 160th OCC : KGS informed that Technical


Bid is under evaluation. Commissioning may not be possible by March 2020 as committed.

UPCL Udupi 2 x 125 39th & 41st SC

Bus 160th OCC : UPCL informed that KPTCL approval is awaited.

NLCIL NLC TPS-II 2nd

Expansion 2x125

2nd SRSCT

Bus

20.1.1 Regional entities to implement the steps to contain the rise in the voltages in

their respective control area stations as given below:

Ensure Bus reactors and Line reactors are switched in.

Capacitor banks especially at high voltage areas are switched off.

Optimizing the GT and ICT tap positions as per the advice of SRLDC/SRPC.

Tap optimization at lower voltage levels to be carried out by STU/SLDC in

coordination with DISCOMs.

All the generating units on bar to absorb reactive power as per their capability

limits.

Operate generating units on synchronous condenser mode for VAR absorption,

whenever feasible.

Release loads in high voltage areas keeping in view the drawl of the control

area.

Maintain drawl from grid close to schedule.

Operate available hydro units on pump mode in high voltage nodes keeping in

view the drawl of the control area.

Load re- arrangement, wherever feasible, may be taken up to optimize loading

on trunk lines.

Line opening would be the last resort by SRLDC after receipt of message from

the constituents.

Concerted action/follow up by SLDC.

Table XI- Capacitor Installation

Utility Reactive Power Planning 2019-20

Voltage level

Remarks ( as reported up to 31st

October 2019)

APTRANSCO

Kadapa: 194.4 MVAR Vijayawada: 172.8 MVAR Visakhapatanam: 215.4 MVAR

On 33 kV side

Kadapa: 14.4 MVAR commissioned Vijayawada: 0 Visakhapatanam: 6.60 MVAR commissioned.


APSPDCL 174 MVAR 76 MVAR commissioned

APEPDCL 0 MVAR 0 MVAR commissioned

KPTCL

Bengaluru Tr. Zone: 388.6 MVAR

12.1 kV 324.8 MVAR commissioned

Bagalkot Tr. Zone: 14.5 MVAR

12.1 kV

Hassan Tr. Zone 11.6 MVAR

Gulbarga Tr. Zone: 8.7 MVAR

2.9 MVAR commissioned

Tumkur Tr. Zone: 17.4 MVAR 12.1 kV 5.8 MVAR commissioned

TSTRANSCO 272.8 MVAR

TSNPDCL 200 x 2 MVAR 127 x 1 MVAR

72 x 2 MVAR 48 x 1 MVAR commissioned

TSSPDCL 13 x 2 MVAR 1 x 1 MVAR

12 x 2 MVAR 1 x 1 MVAR commissioned

TANGEDCO

34 x 2.4 MVAR

11 kV Work not yet completed.

Court case is pending vide

WP No.25515 of 2018, filed

by the company

16 x 2.4 MVAR 22 kV 16 Nos. Commissioned.

2 MVAR - 94 sets 11 kV IPDS - LOA issued on 07.03.2019

13 x 24 MVAR 110 kV PO placed and works under

execution.4 x 24 MVAR

commissioned

2 MVAR - 78 sets

11 kV DDUGJY - LOA issued on

07.03.2019. Work under

execution

67 Sets of 2.4 MVAR capacitor Bank in Coimbatore region

11 kV Instead of 183 sets (82+101)

quantity revised as 68 (67 at

Coimbatore +1 Erode region)

sets DPR submitted to PSDF,

Delhi for approval 2.4 MVAR 1 set - Erode region

11/22 kV

2.4 MVAR 30 sets - Vellore region

11/22 kV 34 sets revised as 30 sets

based on NLDC remarks.

DPR submitted to PSDF,

Delhi. Returned by NLDC

due to remarks in the results

of study conducted by CPRI.

49 sets of 2.4 MVAR - Trichy, Villupuram, TVL, MDU & CNI(S)

11/22 kV 76 sets revised as 49 sets based on NLDC remarks. DPR submitted to PSDF, Delhi. Returned by NLDC


due to remarks in the results of study conducted by CPRI.

Table –XIII- Generating Units- Under Progress

Central Sector

Station Unit

Installed

Capacity

MW

Scheduled date of

synchronizing /

commissioning

Remarks

NTPC

Telangana STPP

Phase I

2 x 800 35th TCC:

U-I CoD 2020

U-2 CoD 2021

33rd TCC:

MoP vide letter dated

05.02.2019 has allocated 85 %

to Telangana and balance 15%

will remain earmarked as

“unallocated power” and is

placed at the disposal of

Central Government for

meeting urgent/continent

requirement of States/UTs

from time to time.

Pudimadaka AP 4 x 1000 34th TCC:

52 Months from Zero

Date

Zero date yet to be finalized.

AP had requested NTPC to

firm up the zero date at the

earliest.

33rd TCC: In response to GoK’s information sought, NTPC had informed that MoP has

allocated 50% to home state (AP) and balance allocation has to be made.

NLCIL

New Thermal

Power Project

I 500 COD: by August 2019 Updates in 36th SRPC

II 500 COD: December 2019

156th OCC:

The NLCIL bays will be ready by the month end. TANTRANSCO informed that after commissioning of HTLS lines to TS-II switchyard, the balance 230 kV lines will be shifted to new TANTRANSCO SS from TS-I switchyard.

35th TCC: PGCIL – August/September 2019

PGCIL (refer Annexure-XVI) had stated that 400 kV D/C NNTPS-Ariyalur line is being constructed by POWERGRID and expected to be completed by September19.The Ariyalur substation is being constructed by TANTRANSCO and it is requested to commission the same matching with schedule of POWERGRID’s transmission line.

TCC deliberation:

TANTRANSCO had informed that Ariyalur substation would be ready by March 2020.

It was noted that since PGCIL had planned line by Sept 2019, the delay in commissioning of substation by TANTRANSCO may lead to payment of the applicable transmission charges in line with CERC Orders on similar cases.

SRPC noted the above.


TPS –II 2nd Expn 1&

2

2 x 660 35th TCC: 2022-23 2nd SRSCT: Evacuation

scheme agreed

NPCIL

KKNPP 3

&

4

2 x 1000 34th TCC:

U3: 2023

U4: 2024

35th TCC:

CTU informed that valid

connectivity for unit 3&4 is

there. But LTA not applied.

NPCIL: Schedule under

review. LTA would be

applied.

BHAVINI

Kalpakkam

(PFBR)

I 500 End of 2020 As per BHAVINI letter dated

30.01.2019.

TANGEDCO:

The following two issues were associated with delay in commissioning of BHAVINI:

Due to uncertainty in commissioning of the Power Plant the DISCOMs are unable to

have any definite Load Generation Plan leading to adverse financial impact.

Considering the stressed financial condition of the Distribution Utilities, M/s PGCIL to

refund the amount of 58 Crores recovered from the beneficiaries with appropriate

interest irrespective of whether or not the amount has been recovered from BHAVINI.

PGCIL (SR-II):

On dismissal by APTEL of an appeal of BHAVINI against the CERC Tariff Order

directing to pay the transmission charges for Kalpakkam –Arni and Kalpakkam -

Sirucheri lines, BHAVINI is liable to pay the charges and they have agreed to pay after

commissioning of their unit, facilitating cash flow. However, POWERGRID has been

pursuing vigorously for early release of payments by M/s BHAVINI. With regard to

refund of Tr. Charges of 58 Cr. provisionally billed through POC from 01.04.2012 to

31.12.2014, shall be refunded to DICs only upon receipt of payment from BHAVINI.

In this regard, it may be noted that the STU lines of TN and Karnataka, which are being

billed & disbursed in POC, underwent down revision in the recent tariff orders issued by

CERC and accordingly, the STUs are liable to refund the transmission charges to CTU

for disbursement to other DICs in the country. Such an adjustment by CTU can also

happen only on receipt of refund from TN & Karnataka.

In view of the above, the adjustments / refund of transmission charges arising on

account of CERC Orders is possible by the CTU only after receipt of refund funds from

the concerned DICs, as the role of CTU is revenue neutral in such matters.

PGCIL (refer Annexure-XVI) had proposed that the lines 230 kV D/C BHAVINI- Sirucheri and 230 kV D/C BHAVINI- Arani may be delinked from BHAVINI generation and the same may be treated as system strengthening.

In view of absence of revenue, POWERGRID shall not be able to operate to maintain the line & shall be constraint to open the 230 kV D/C BHAVINI – Sirucheri and 230kV D/C BHAVINI – Arani line.

TCC deliberation:

PGCIL had proposed that the evacuation lines may be delinked from BHAVINI generation and same may be treated as system strengthening.

TANGEDCO had expressed that BHAVINI evacuation system is not at all required by

TANTRANSCO to cater the load of TN system. CERC and APTEL Order in this


regard may be followed by PGCIL for revenue collection.

SRPC deliberation:

ED (RT), PGCIL observed that every asset was being created with lot of difficulty.

Especially in the line from BHAVINI to Kancheepuram, there were severe RoW

issues. He expressed concern on disowning the asset stating that the entity doesn’t

require it. In this situation it is difficult for POWERGRID to go forward in creating the

assets for benefit of all stakeholders. He requested the SRPC forum to take care of

POWERGRID also.

Director (Tr. Projects), TANTRANSCO said that during construction of transmission

lines all the utilities had faced RoW issues. This could not be cited as a reason for

charging the line on TN. These lines are evacuation lines of BHAVINI and it should

be charged on BHAVINI.

PGCIL clarified that the issue is not bearing entire cost by TANGEDCO, there is some

utilization of the two lines and to that extent only charges were requested.

TANGEDCO stated that there is APTEL Order in this regard and PGCIL may follow

the same. As such, the issue would not qualify for deliberation in SRPC.

UMPP

Krishnapatnam 3960

(6 x 660)

35th SRPC: Chairperson, SRPC & CMD, APTRANSCO had informed that the stay on revoking the BG of CAPL had been dismissed by Hon’ble High Court in its Order dated 15.01.2019. All the beneficiaries have been requested to encash the BG. There were two issues; one was what has to be done on the land and other on the penalty on loss of generation (some of the states had requested at that point of time). It appears that CAPL had approached Hon’ble Supreme Court and the Court has directed Hon’ble CERC to settle the matter within 12 weeks from 21.01.2019.

35th TCC:APTRANSCO had informed the following: Based on the judgment, all the procures have encashed the BG amount of Rs.300 crores

M/s CAPL had filed petition before CERC with a prayer to refer the dispute between the parties to Arbitration under the Indian Council of Arbitration (ICA) Rules.

M/s CAPL had filed the rejoinder to the counter filed by APDISCOMs. Matter is pending before CERC.

A Meeting of all procures of UMPP Krishnapatnam was held on 07.05.2019, all the procurers except Maharashtra has communicated their consent to file petition jointly before CERC in order to recover balance liquidated damages amount of Rs.100 crores from M/s CAPL and to oppose jointly before CERC on the proposal of M/s CAPL to refer the dispute between the parties for Arbitration under ICA Rules.

SRPC noted the above.

Cheyyur 4000

Request for Qualification (RfQ) and Request for Proposal (RfP) issued in 2013 were withdrawn. A fresh bid would be issued after finalization of SBDs. However, recently MoP is examining the possibility of setting up Cheyyur UMPP on domestic coal instead of imported coal. For setting up of this UMPP on domestic coal, additional land of about 767 acres for Ash Dyke area would be required. Power Finance Corporation has taken up the matter of identification of additional land for Cheyyur UMPP with the Govt. of Tamil Nadu. Ministry of Coal has been requested to identify the suitable coal blocks

35th TCC:

TANGEDCO had stated that other states have shown no interest and future course of action has to be decided.


SRPC deliberation:

CMD, TNEBL informed that they had discussion with various stakeholders; broadly the consensus was that most of the states were not interested. They would take up with MoP.

STATE SECTOR & IPP

Updated status of new projects of State sector is furnished below:

Sl

No

Name of project Located

in

Capacity

in MW

Commissioning Schedule

/Remarks

1 Rayalaseema TPS ST-IV AP 1 x 600 2019-20

2 Dr. NTTPS, Vijayawada AP 1 x 800 35th TCC: 2019-20

3 Krishnapatnam Stage II

(U3)

AP 1 x 800 35th TCC: 2019-20

4 Polaki AP 4000 (5 x

800 MW)

5 Edlapur KAR 1 x 800

6 North Chennai Stage III TN 1 x 800 35th TCC : 2019-20

7 Ennore SEZ STPP

(North Chennai Stage IV)

TN 2 x 660 35th TCC : 2020-21

8 Ennore TPS Exp TN 1 x 660 35th TCC : 2022-23

9 Ennore replacement TN 1 x 660 35th TCC : 2022-23

10 Udangudi Stage I TN 2 x 660 35th TCC : 2021-22

11 Udangudi Stage II TN 2 x 660 33rd TCC: 2023-24

12 Udangudi Stage III TN 2 x 660 33rd TCC: 2024-25

11 Uppur TPP (TBCB) TN 2 x 800 35th TCC : 2022-23

12 Manuguru TPP

(Bhadradri)

Telangana 4 x 270 35th TCC :

U1: First synchronization

carried out on 19.09.2019

U2: COD September 2019

U3: COD November 2019

U4: COD December 2019

13 Kakatiya TPP Stage III Telangana 1 x 800 Not decided

15 Damaracherla (Yadadri) Telangana 5x800 35th TCC :

Unit-1&2: Commissioning on

16.10.2020

Unit-3,4&5: Commissioning

16.10.2021

2nd SRSCT:

Revised Transmission

Evacuation Scheme discussed.

Joint system Studies with

revised connectivity to be

carried out.


Table-XVI

RGMO status extension to SLDC/SRLDC

State/Entity RGMO Status extension

to SLDC/SRLDC

Comment

TS Thermal updated. Hydro

Manually updated at the

TSSLDC

TSTRANSCO is requested to take up

the issue with GENCO and solve the

issue

KAR RTPS-4, Supa and LDPH RTPS Unit IV: will be made available during R & M works.

LDPH: Carried out the works. Complete wiring is over. Extended upto SLDC.

Supa: yet to be carried out.

KER Sholayar Sholayar: One unit is out of service

and is undergoing Renovation and

RGMO/FGMO with MI will be available

when the unit is put back after

Renovation. The Renovation of other

two units will be carried out

subsequently.

TABLE-XVI Load shedding

The following was informed by constituent states for month of November 2019:

State/UT Load

shedding

in MU

Max load

shedding

in MW

Bilateral

Purchases

import

(+)/export(-)

in MU

Comments

AP 0 0 1069/46

TS 0 0 1082/84 Agricultural supply is

extended to 24 hours in all

the districts from 1st

January 2018.

KAR 0.00 0 250/319

KER 3.8 200 750/02

TN 0 0 2199/14

PED 0.0 0


Data to be submitted

Data to be

furnished

By

whom

To whom Frequency Comments

1 OCC approval

requests for

Generation

Units Outages

Generat

ors

SRPC/SR

LDC

3rd of every

month

Planned Outages of CGS/ISG stations/MPPs approved for the month of December/January 2019 are enclosed at Annexure-I

2

ISTS/State

Sector

Transmission

Lines and

Elements

Outage

Proposals

Transmi

ssion

License

es/Gene

rators

SRPC/

SRLDC

3rd of every

month/Mid

review by

Outage proposals for the months of April/May 2019 in respect of Central and State Transmission lines and elements were approved and posted on SRPC website (http://www.srpc.kar.nic.in/website/2017/operation/plout1147occ.xls).

An outage coordination group had been created ([email protected]) for

review of the previous OCC approved shut downs (construction/critical).

3 Availed and

non-availed

transmission

elements

report

SRLDC Request

ors/SRP

C

3rd of every

month

4 Comments/Re

asons for non-

availing the

shutdown.

Transmi

ssion

License

es/Gene

rators

SRPC/S

RLDC

6th of every

month

5 Annual Outage

plan schedule

vs Actual

maintenance

All

Generat

ors

SRPC Monthly Information is required for the Annual Outage

Plan Deviation Report being submitted to

CERC. (CGS, State & IPPs) and

Transmission Licensees

6 Reasons for

demand-

supply gap

and its

variations

Constitu

ents

SRPC for further communication to MoP/CE

A

Every month

along with

PSP

MoP/CEA specifically needed the reasons for

load shedding like transmission constraints,

distribution constraints, regulatory constraints

viz the power purchase not allowed beyond

an agreed cost or quantum, natural

calamities, tripping of some of major

transmission lines etc. Even if load shedding

is zero a ‘Nil’ report needed to be furnished

on monthly basis.

7 LS(In MU/MW) States SRPC/S

RLDC

Monthly Refer Table XVI

8 Bilateral states SRPC/S Monthly

http://www.srpc.kar.nic.in/website/2017/operation/plout1147occ.xls

http://www.srpc.kar.nic.in/website/2017/operation/plout1147occ.xls



Purchases RLDC

9 Installation/he

althy

capacitors

All

Constitu

ents

SRPC/S

RLDC

Monthly Installation & ensuring healthiness of capacitor banks at distribution level should be ensured by all the constituents.

10 MVAR Interchange/MVAR capability testing

All

Generat

ors/SLD

Cs

SRPC/S

RLDC

4th of every

month All the SLDCs to kindly monitor VAR absorption/injection of generating units in their respective control areas in real-time.

Order of Hon’ble CERC dated 23.12.2009 merited attention in this regard. All agencies needed to provide required reactive compensation thus avoiding the need for exchange of reactive power to/from ISTS and maintain ISTS voltage within specific range.

11 AUFR & df/dt schemes

All

constitu

ents

SRPC/S

RLDC

Updates if

any changes

Details of the feeders implemented in AUFR

& df/dt schemes along with the status of

SCADA mapping as per the specified

Formats.

12 Detailed

report of

operation of

AUFR

All

constitu

ents

SRPC/S

RLDC

Daily basis In accordance with clause 9 (2) of CEA (Grid Standards) Regulations, 2010. It was noted that only KSEBL and PED were submitting the daily report regarding operation of relays.

13 Upcoming

Wind/Solar

Projects

All

Constitu

ents

SRPC/S

RLDC

Monthly Procedure for RE Frameworks had been

notified and is available at NLDC website.

Progress of works of RE Generators and

evacuation system are available in the

minutes of the LVRT/RE Meeting held on

25.10.2017.

14 Outage

deviation

report

All

States/E

ntities

SRPC/S

RLDC

Monthly Outage plan deviation Generating

Units/Transmission Elements of Southern

Region needed to be submitted by all the

concerned which is to be communicated to

Hon’ble CERC.

15 Power Supply to Rural Areas

All

DISCOM

S

SRPC First week of

the month

for previous

month.

In the Meeting held at MoP on 09.04.2014 it

had been decided to collect the data

invariably from DISCOMs. It is requested

that the data in this regard in the required

format may please be arranged to be

communicated to SRPC Secretariat at the

following E-mail addresses: msssrpc-

[email protected]/[email protected]




16 Status of implementation of the recommendations of the Enquiry Committee

3rd and 17th

of every

month

17 Energy

Generation

data

Management

from

Renewable

Energy

Sources

All the

states

To CEA

with a

copy to

SRPC

Monthly Information furnished by states as on 30.11.2019 is at Annexure-II

18 Power supply

hours in

various

States/UTs

(Rural and

Urban areas)

All

States

SRPC Monthly For Replying to Parliament Questions: CEA Requirement

19 Physical and Cyber Security/Crisis Management Plan/Black Start Procedure

CEA/SR

PC

Quarterly Cyber Security: To be furnished to Chief Engineer, DPD, CEA, Sewa Bhavan, New Delhi-110066. Physical Security, other Mock Drills for CMP, Mock Drill for Black Start Restoration: Chief Engineer, DMLF, CEA, Sewa Bhavan, New Delhi-110066. Information required by CEA (vide letter dated 26.11.2013) regarding Security of power installations was to be furnished to CEA.

20 Declaration of

availability

and

healthiness of

various

protection /

defense

mechanism

All

States

SRLDC/

SRPC

Monthly Validated certificates needed to be communicated in a timely manner.

21 Tripping

Details/Repor

ts

All the

concern

ed

SRLDC Within 24 hrs as per IEGC/CEA regulations. Para 29 of Hon’ble CERC Order dated 20.02.2014 in respect of Petition No.146/MP/2013 was brought to attention of the OCC.

22 Compiled

Telemetry

status

Utility

wise

As directed by Hon’ble Commission Hon’ble Commission vide order

dated 19.12.2013 on Suo-moto petition No. 56/SM/2013 had directed

all the utilities to provide the required telemetry within six months of

this order.It was requested that MAPS, KGS & KKNPP may please


furnish the compliance status of pending SCADA inputs the earliest.

Details in this regard were available on SRLDC web site. For KKNPP

only 2 points are pending w.r.t GT tap position. Re -tendering was

going on and it will take 5 more months to complete the works.

23 Prolon-ged

outage

States SRPC/SRLDC Monthly All constituents were requested to

convey the schedule of revival for

the elements under prolonged

outage to SRPC, which was to be

reported to Hon’ble CERC on

monthly basis. (CERC Order on

petition no 146/MP/2013).

24 Nodal Officer

list : Disaster

Management

All

utilities

SRLDC Update The updated status as per the

information available with SRLDC

has already been shared.

25 Presentation

on Operation

al Issues

States/E

ntities

SRPC/SRLDC 5th of Every month

Annexure - III

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