AprilMay - Kar · 2019. 5. 8. · 154th OCC MOM held on 09.04.2019 at SRPC Bangalore Page 1 Minutes...

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154th OCC MOM held on 09.04.2019 at SRPC Bangalore Page 1

Minutes of the 154th Meeting of Operation Coordination Committee held at SRPC Bengaluru on 09.04.2019

1. Introduction

1.1 The 154th Meeting of Operation Coordination Committee of SRPC was held on

9th April 2019 at SRPC Bengaluru. The list of participants is given at Annexure-

1A.

1.2 Shri S R Bhat, Member Secretary, SRPC welcomed all the esteemed

participants to the 154th Meeting of OCC.

On grid side, MS highlighted the following:

As all are aware and as highlighted in the previous OCC, MoP had issued five

OMs regarding maximising of thermal generation in view of expected

increased power demand in the next few months till monsoon. SRPC had

devised some formats to capture the thermal generation on a daily basis. On

a daily basis, thermal generation details were being posted in the OCC Group.

It was observed that Talcher has not met Normative DC during last year.

Talcher is a very important station for SR constituents, being cheapest. During

March 2019 loss of DC was around 205 MW for SR ISG Thermal Stations

which is a matter of concern especially during the peak month.

A Meeting was convened on 25.03.2019 at Chennai to discuss on accounting

of NNTPS drawal/injection and TN drawal and some consensus was arrived

at. Minutes of the Meeting had been issued.

Power Sale Agreement of NLC TS I with TANTRANSCO had expired on

31.03.2019. Scheduling of NLC I needed to be carried out by SRLDC w.e.f.

01.04.2019 as per IEGC Provisions. SRPC had taken up the pertinent issues

with NLCIL.

As suggested by APTRANSCO in 35th SRPC Meeting, a meeting is scheduled

on 30.04.20019 at SRPC Bengaluru to discuss on the preparation of

Guidelines/Manual for disaster management.

Communication Meeting which was scheduled for 16th is postponed to

25.04.2019. All the entities had been requested to furnish some information in

specific formats. A report is needed to be submitted to CERC by 30th April


2019 by SRPC as per Communication Regulations. He requested all

concerned to take it seriously and furnish the information at the earliest.

A Special Meeting to discuss on the implementation of AGC at state level and

at NLCIL/NTPL had convened on 14.03.2019 at SRPC Bengaluru.

OEMs/vendors also participated in the discussions in the Meeting.

CEA had requested that issues related to transmission planning, if any,

brought to the notice of RPCs may kindly be referred to Member(Power

System), CEA so that it could be examined in context of coordinated planning

by CEA as per the provisions of Electricity Act and Orders of Government of

India. In the 153rd OCC Meeting the issues regarding N-1 criteria getting

violated for 400/220 kV ICTs at UPCL, Karnataka and 220 kV connectivity to

Bhadradri, TSGENCO had been discussed. SRPC had referred these two

issues to CEA. He requested all to furnish the details of such issues so that

SRPC may refer to CEA. Shortly a Meeting of Standing Committee may be

convened in SR by CEA.

VC to discuss SCADA issues state wise were to be convened. It is observed

that SCADA issues had been reduced in the near recent past.

1.3 Superintending Engineer (O), SRPC took up the Agenda for discussions.

2. Confirmation of the Minutes of the 153rd Meeting of OCC of SRPC held on 9h March 2019 at SRPC Bengaluru The Minutes of the 153rd OCCM were confirmed.

3. MAJOR ISSUES

3.1 Coal requirements for Thermal Plants

In the 152nd OCC Meeting it was noted that MoP vide OMs dated 07.02.2019 had

informed that it has been decided that in view of expected increased power

demand in the next few months till monsoon, Central Government and State

Government plants should be given more responsibility and must be encouraged

and facilitated to gear up their generation to provide uninterrupted power at

appropriate price to consumers in this period. All power plants were advised to be

watchful and to maintain plant availability and adequate coal stocks as per norms

in this period. It was kindly requested to take necessary action and issue


necessary instructions to take immediate steps for immediate implementation of

these decisions.

In the 153rd OCC Meeting, generators had expressed some issues regarding coal

supply w.r.t railway/coal companies. Chairperson SRPC had taken up those

issues with the concerned.

Letter dated 19.03.2019 addressed to Chairman, Railway Board

(Annexure-3A)

Letter dated 19.03.2019 addressed to Chairman cum Managing Director,

Singareni Collieries Company Ltd. (SCL) (Annexure-3B)

Letter dated 19.03.2019 addressed to Central Institute of Mining and Fuel

Research(CIMFR) (Annexure-3C)

Letter dated 20.03.2019 addressed to Chairman Cum Managing Director,

Mahanadi Coal Fields (MCL) (Annexure-3D)

The following were noted in the Meeting:

APGENCO stated that till May 2019 there were no coal and Railways issues

envisaged.

KPCL stated that there were some Railways, MCL, WCL issues which had

been taken up with the concerned entities and the copy had been furnished

to SRPC.

TN informed that there were some rake allocation issues by Railways at CCL,

ECL and Ib (MCL) to Paradip. The rakes allocation was around 54% for the

quarter Jan-March 2019. The Rail programme sanctioned was 461 against

the submitted programme of 530 rakes for the period from April to June 2019.

Coal testing reports from CIMFR, Dhanbad and Ranchi were received

belatedly and there were issues of unsampled rakes for which explanation

was sought from CIMFR, Dhanbad. Lot of big size stones, shales and

boulders have been received from Kunustoria (Bansara sidings) of ECL. The

issue had been taken up with ECL vide letter dated 25.01.2019. ECL needs

to supply atleast 3 rakes/day. CCL had supplied 3 rakes against 30 rakes for

the month of March 2019 due to want of rakes from ECR. Railways to

enhance 2 number of rakes through ARR from Ib to Mettur.

NTPC, Talcher informed that the working hrs may get reduced with the onset

of summer and thus coal supply may be affected. Coal quality and frequent

strikes had affected the coal supply. Present coal stock was around 2 days.

NTPC Talcher agreed to furnish the details to SRPC. It was noted with

concern that there was a loss of DC ( wrt normative) in Talcher stage-II

during the year 2019. Talcher stage-II was not able to achieve normative PAF


for the year 2018-19. KSEBL agreed to take up the issue at higher level and

requested NTPC, Talcher to furnish the details.

NTPC confirmed that there were no Railways and coal supply issues in

respect of other NTPC stations of SR till May 2019.

NTPL confirmed that there were no Railways and coal supply issues

envisaged till May 2019.

NTECL confirmed that there were no transport and coal supply issues

envisaged till May 2019.

NLCIL informed that there were no lignite and conveyor issues envisaged till

May 2019.

TS confirmed that there were no Railways and coal supply issues envisaged

till May 2019.

3.2 SCED Procedure

POSOCO vide letter dated 29.03.2019 (Annexure-3E) had furnished the final

procedure for SCED for interstate generating stations Pan India to be

operationalized w.e.f 01.04.2019.

Request for exclusion of SCED during ESP PG Test

Kudgi NTPC vide letter dated 03.04.2019 (Annexure-3F) had requested to

exclude NTPC Kudgi in SCED for 8 days(3rd to 8th April 2019) from 16:00

hours to 24:00 hours to facilitate the ESP PG test in Unit III.

Subsequently SRLDC had informed that matter had been discussed with

NLDC and it is recommended to exclude Kudgi from SCED as requested by

them.

In the Meeting NLDC joined through VC and shared the experience of SCED

operationalization. The following were noted:

In compliance to the CERC Order dated 31st Jan 2019 in petition No.

02/SM/2019, the pilot on SCED for inter State Generating Stations pan India,

was operationalized from 1300 Hrs on 01st April, 2019. The generating

stations have extended full cooperation for the implementation of the SCED

and it is duly acknowledged.

The Security Constrained Economic Dispatch, as the name suggests, is an

involved process covering merit order dispatch as well as honouring all

constraints such as the total requisition from the ISGS, inter-regional

available transfer capability, maximum generation and ramp up/down rates.


While both RRAS and SCED follow merit order, RRAS is dispatched ahead of

time in the time frame when schedules are being revised and SCED runs

after all schedule revisions (including URS) have been finalized.

The five RLDCs are responsible for the coordinated multilateral scheduling

activity at the regional level through the Web Based Energy Scheduling

(WBES) Software. SCED is a maiden exercise that has been taken up pan

India for the first time with dispatch instructions being issued by NLDC. In

order to facilitate SCED, a massive exercise to synchronize the schedules

issued by the five RLDCs has been carried and a central data collection

server has been deployed at NLDC. The NLDC server fetches the schedule

from the RLDCs servers which serve as the base inputs to the SCED Engine.

The output of SCED Engine is transferred back to the WBES for onward

information dissemination to the stakeholders.

As per CERC order, the existing timelines for scheduling as per IEGC have to

be honoured, thereby meaning that only a 30- minute window is available for

the entire process mentioned above before the delivery starts. This extensive

scheduling data communication requirement makes the entire process very

complex and also places an onerous requirement for reliable communication

systems. Efforts have been made to streamline the scheduling process and

the WBES is now running the schedule program in auto mode in each time

block to generate schedule for the stakeholders as well as for back & forth

transfer with NLDC. Inconsistency in the data for example, non –

synchronization of revisions, say if one revision of any RLDC is missed in

data exchange leads to a infeasible/non-converged solution which in turn

leads to schedules which are counter intuitive or may violate the constraints.

In case any generating station receives schedule which does not conform to

the declared constraints like DC, technical minimum, ramp rate then the

generating station should operate honouring the declared constraints and the

same would be taken care of in the implemented schedules.

The SCED algorithm has been running almost uninterrupted since it was

implemented on 1st April 2019 barring two instances on 3rd April and 7th April

when it had to be interrupted due to issues as mentioned above for attending


to and fixing the teething troubles / glitches. NLDC is constantly working on

addressing these issues and looks forward to cooperation from all.

The detailed presentation by NLDC is at Annexure-3G. The presentation

covered three parts- the presentation in 152nd OCC(on 12.02.2019), efforts

for operationalising SCED and lessons learnt during operationalization of

SCED from 01.04.2019 till today. NLDC observed that for more savings

decrease of technical minimum and increase of ramp rates are required. It

was noted that ramping is emerging as a critical constraint. Total Reserves

available are getting limited by the available ramping capability.

MS SRPC requested NLDC to further take up regarding increasing or Ramp

rates of thermal generators. NLDC informed that as per Terms and

Conditions of Tariff 2019-24, there is already a provision that by 30.06.2019,

NLDC is required to furnish a procedure regarding ramp rate since generators

are to be incentivised for ramp rates above 1% and penalized for ramp rates

below 1 %. NLDC already had given feedback on Technical Minimum,

Flexibility and Ramp Rate to CERC. Further NLDC will be seeking

suggestions from all entities regarding ramp rates which will be considered

while submitting the procedure for CERC as per Tariff Regulations.

Simhadri NTPC informed that to achieve a ramp up of 100 MW in one block,

actual ramp up required is 200 MW (Ramp rate -100 MW/block). While

increasing the ramp rate high temperature in the boiler is observed and there

was a unit trip incidence recently in Unit IV of Simhadri. It was pointed out

that the time period for SG(scheduled generation) for generators has

theoretically came down to 13 minutes(earlier it was I time block, 15 minutes)

and was facing problems in increasing the generation due to limitations due

to response time of boilers. Some incidences of schedules more than DC also

were observed. It was strongly suggested that at least one time block before

SG for generators may be available to generators.

NLDC stated that these issues will be addressed further and explained the

constraints in time lines due to number of actions to be carried out,

communication issues(may be a reason for schedule more than DC) and

SCED optimisation. NLDC assured regarding ramp rate that the ramp rate


declared by Generators themselves only will be considered while giving the

SCED schedules.

SRPC, observing that only coal fired thermal stations are coming under

SCED and Kudgi is the costliest Station in India under SCED. From the

information available data on NLDC website it was noted that Kudgi is given

SCED up schedule. SCED up schedule (start from cheapest station) should

be equal to down schedule(start from costlier station). Each SCED block wise

schedule should be honouring the ramp rate. Quantum of SCED up/down

depends on DC, Schedule, Ramp and ATC. This situation was difficult to

comprehend.

NLDC stated that while giving SCED Up , not only variable charges are taken

into consideration but due to multiple constraints situation of getting SCED Up

to costlier station also may arise. Perhaps on account of NIL ATC

Margins(inter-regional) the costliest generator in India, Kudgi, located in in SR

might have got SCED Up instructions.

MS SRPC stated that SCED algorithm already have factored the ATC margin

available prior to giving SCED instructions to Kudgi. It is also to be

considered whether net SCED instructions for generators need to be

implemented during market splitting conditions between NEW Grid and SR or

separate optimisation for SR generators would be carried out during such

conditions.

It was noted that in NR one of the generators had received SCED up and

RRAS down regulation for the same block. Also on 4th April 2019 at 93rd

block, Unchahar TPS II has got SCED up instruction of 30 MW whereas

Unchahar Stage I had got SCED down instruction of 30 MW (both the

generators have same variable cost as per AS I form). As per the optimization

algorithm, generators with the same variable cost located at the same

electrical node should get SCED instructions in the same directions subject to

margin available.

SE(O), SRPC recalled that during the presentation on SCED in OCC Meeting

on 12.02.2019, SRPC had suggested NLDC that simultaneous optimization of


RRAS and SCED can be carried out so that contradictory RRAS and SCED

signals can be avoided and better economical optimization may be acheived.

RRAS computations/instructions should be processed along with the SCED

algorithm for true optimization. As we approach real time(T-2) the RRAS

requirements(quantum and the selection of generators) would get better

optimized as against the existing practice of RRAS which is despatched much

earlier than T-2 time block. Also number of ATC violations is observed, the

treatment SCED schedules during congestion period may need more clarity.

NLDC informed that there is also a provision in algorithm to restrict the ATC

and a lower value helps in congestion management.

On a query to TANTRANSCO, it was clarified that state MOD will not be

disturbed because of SCED schedule.

MS SRPC suggested that all these issues may be discussed separately

through VC with participation from NLDC, SRLDC and SRPC.

After deliberations on various issues the following was the feedback:

POSOCO was complimented by the OCC forum for the SCED

implementation. It was noted that considerable efforts had gone in especially

from NLDC side for SCED implementation. The efforts of the generators in

this regard were also well appreciated. POSOCO informed that some

teething issues were being addressed.

Generators pointed out that the effective communication of the generation

schedule had reduced to 13 minutes and less and requested for one clear

block communication of generation schedule. POSOCO explained the

constraint in time lines due to number of interfaces, SCED optimization,

communication issues etc and stated that this was the most optimized time

frame to communicate the generation schedules to the generators at present.

Generators pointed out that there were some cases of ramp violations,

schedules more than DC, simultaneous RRAS and SCED schedules in

opposite direction etc. The generators were requested to furnish all the

relevant details to POSOCO for possible corrective action.


Generators pointed out that during sign change, SCED schedules were being

given which was sometimes making it difficult to carry out the sign change.

POSOCO agreed to look into the aspect.

SRPC pointed out that Kudgi has the highest VC among the SCED

generators throughout the country but yet it was getting SCED Up schedules.

POSOCO pointed out that this may be possible due to the constraints. It was

agreed that the issue would be discussed separately through VC with

participation from NLDC, SRLDC and SRPC.

SRPC stated that RRAS and SCED optimization could be carried out

simultaneously for optimal economic solution which would avoid

contradictory RRAS and SCED schedules also. The same had been

communicated to POSOCO during their presentation at SRPC. POSOCO

agreed to look into this suggestion.

SRPC pointed out that during congestion warning notices, the SCED

schedules also could be curtailed / optimized. POSOCO pointed out that they

were aware of the issues and they were optimizing the margins available for

SCED schedules during such situations. The issue would be further looked

into.

NLDC stated that ramp rates of generators were at times the limiting factor in

carrying out further optimization under SCED. SRPC requested NLDC to flag

the issue of ramp rates of ISGS stations with Hon’ble Commission. POSOCO

agreed to look into this suggestion.

SRPC vide letter dated 05.04.2019, 11.04.2019 & 12.04.2019 (Annexure-.3H) had

communicated some of the issues/suggestions regarding SCED scheduling with

NLDC.

3.3 Sale of power from NLC TPS-I

NLCIL vide letter dated 05.04.2019 (Annexure-3I) had informed that TANGEDCO

vide letter dated 27.03.2019 had intimated TANGEDCO has decided not to extend

the Power Sale Agreement in respect of Thermal Power Station –I beyond 31st

March 2019. NLC India Limited had planned to run the plant for meeting internal

consumption and approached TNSLDC for standing Clearance / No Objection

Certificate for sale of balance power in Term ahead Market of power exchange


(IEX), since the station is connected to STU through TANTRANSCO owned 110 kV.

TNSLDC issued standing clearance /No Objection Certificate on 31.03.2019 for

duration of one month. Once the 110 KV TANTRANSCO lines connected to TPS-I is

shifted to their substation, NLC India Limited will approach SRLDC for scheduling as

explained in the special meeting.

In the Meeting ED SRLDC informed that NLCIL had communicated that NLCIL

had requested TN to give NOC for selling power from NTPC in IEX. NLCIL

informed that the Power Sale Agreement with TN in respect of NLC TPS-1 has

expired on 31.03.2019. At present NLCIL is taking permission from TN and selling

in IEX. He stated that clarity was required regarding the scheduling jurisdiction of

NLCIL power.

The following was noted:

NLC TS I is a generating station with no full allocation to the host state.

As per IEGC Regulation, responsibility of coordination of scheduling lies with

RLDC in case Central Generating Stations does not have full allocation to

the host state.

MAPS Kalpakkam is a Central Generating Station with connectivity only to

STU. However the responsibility of coordination of scheduling lies with

RLDC as per IEGC Regulation.

TS I Station may need to be scheduled by SRLDC from 01.04.2019.

This matter was also clearly explained in the Special Meeting held on

25.03.2019 at Chennai.

SRLDC stated that in the present scenario NLC TS I may be considered as a CGS

merchant plant (CGS not dedicated to any state) connected to state network and

scheduling may come under purview of SRLDC. SRLDC will make a procedure

but NOC from STU is required since TN STU is used to evacuate NLC Power.

After deliberations the following was concluded:

The plant was earlier a Central Generating Station with full allocation to TN.

OCC opined that presently NLC TPS-1 was a Central Generating Station

without allocation to any state. Accordingly, as per IEGC Clause 6.4.2(a),


NLC TS I would come under the control area of SRLDC. It was agreed that

SRLDC would carry out the scheduling after compliance of all the formalities

by NLC like user registration, metering scheme approval, real time SCADA

etc. However NOC from STU would be required since TN transmission

system is used for evacuation the power.

3.4 Discussion on RSD procedure

SRLDC vide E-Mail dated 05.04.2019 had requested the following point to be

included in the agenda of 154th OCC meeting to be held on 09.04.2019. The

following were noted in the mail.

Honorable CERC vide order No. L-1/219/2017-CERC had approved detailed

operating procedure for taking units under RSD. SRLDC need an elaborate

discussion to come to a common platform for smooth implementation of RSD

procedure on following points:

i) All the units technical minimum would be made zero, states have to provide reasonable requisitions otherwise generator shall take a call regarding RSD.

ii) States are required to give realistic requisitions before 20:00 Hrs in order to

have effective RSD decision. iii) If the schedule goes below technical minimum for few blocks during the real

time, actions to be taken based on grid condition. iv) Request to take unit under RSD or revival from RSD shall be through web

based scheduling program by providing required requisitions for the same. v) Discussion on the time of revival considering different warm/cold start up time

for different generators Other associated points.

In the Meeting SRLDC informed that they have faced few minor isues while

implementing RSD Procedure and requested for clarification from the forum,

mainly from beneficiaries.

SRLDC presented (Annexure-3J) the different possible cases, like throughout the

day schedule is below technical minimum except during peak hours, except

morning few blocks, requisition is high, throughout the day intermittent requisition,

ie few blocks below TM and few blocks above TM, continuously for around five


hours below TM and rest of the time high requisition and the last case throughout

the day marginal difference between TM and requisition.

The following guidelines were agreed after deliberations:

RSD guidelines on D-1 day

SRLDC would make the technical minimum as zero for all the ISG stations.

During D-1 (Day ahead), the requisitions received from the beneficiaries up to

20:00 Hrs would be summated without constraining to the technical minimum

(but honouring the ramp rates) and the resultant schedules would be passed

on to the generator through web based scheduling program.

The beneficiaries would give realistic schedules as far as possible as

subsequent surrenders/recalls would impact the schedules of other

beneficiaries who have entitlements in that generator. If any beneficiary

desires that any unit should not go on RSD, they would ensure that they

provide required requisition in order to bring generator schedule equal to or

above technical minimum and to the extent possible and they should not

surrender the same in real time, unless there are extenuating circumstances.

However, SRLDC may consider clause 5.6 and 5.7 of approved RSD

procedure during issue of final schedule with advance intimation to SLDCs

and associated ISGS.

The generator would decide whether the resultant schedules are serviceable

by keeping units on bars or alternately arrange for unit to go on RSD under

intimation to RLDC latest by 21:00 Hrs. The beneficiaries would be intimated

of the decision by the final schedules/RSD intimation uploaded on SRLDC

website. The type of shutdown would be communicated by the generator

based on the requisitions (On Bar DC, Off Bar DC and DC as per the type of

RSD).

RSD guidelines on real time

During the day of operation, if the resultant schedules of the generator fall

below technical minimum for 8 contiguous hours or more, SRLDC would take

a call to permit the unit to go on RSD or not depending on the grid conditions.

If the resultant schedules are less than technical minimum for period less than

8 contiguous hours, technical minimum would be ensured for the generating

station by RLDC. This would ensure the stable operation of generation unit.

However, SRLDC would examine the grid security aspects before taking the

unit under reserve shutdown and can provide technical minimum schedule to

the generating station for smooth grid operation in line as per clause 5.7 of

RSD procedure and clause 6.5.14 and 6.5.20 of Indian Electricity Grid Code.

Notwithstanding the above, SRLDC may schedule any of the ISGS units to be

on bar or direct the unit(s) to go off bar depending upon the grid conditions.

Other guidelines/issues on RSD:


All the generators would communicate the revival times from hot, warm and

cold conditions in AS1 form. The hot, warm and cold condition would be as per

the Procedure < 10 hrs, 10 hrs-72 hrs and > 72 hrs.

The beneficiaries had to requisitions appropriately considering the revival

times from hot, warm and cold conditions, their requirements during all the 96

blocks etc.

KPTCL raised apprehension that some of the beneficiaries may raise the

requisitions on D-1 but in real time may not avail the power. It was pointed out

that the Procedure would be followed and KPTCL or any beneficiary may raise

this issue, if observed, and the same would be taken up at higher level.

Some of the generators pointed out that a unit could be revived before 8 hrs

as well. It was noted that as per clause 7.1 unit can be recalled after 8 hrs,

however in case of system requirements the same can be revived before 8

hrs. Generally such situation would arise only in real time and the decision on

system requirement would be through SRLDC.

There could be cases where generator though having schedules (R-1) which

would have resulted in RSD of the unit had decided to keep the unit on bar. In

such cases, SRLDC would take appropriate decision on providing technical

minimum schedule or communicating the requisitions of beneficiaries as

received in real time.

3.5 Transmission planning related issues

PSPA Division II, CEA vide letterer dated 08.03.2019 (Annexure-3K) had

requested that issues related to transmission planning, if any, brought to the notice

of RPCs may kindly be referred to Member(Power System), CEA so that it could

be examined in context of coordinated planning by CEA as per the provisions of

Electricity Act and Orders of Government of India.

In the 153rd OCC Meeting the issues regarding N-1 criteria getting violated for

400/220 kV ICTs at UPCL, Karnataka and 220 kV connectivity to Bhadradri,

TSGENCO had been discussed.

SRPC vide letter dated 22.03.2019(Annexure-3L) had communicated these

issues with CEA.

In the Meeting SE(O), SRPC requested all the entities to submit the transmission

constraints, if any.

KPTCL was suggested to study the voltage issues/overloading issues in their

system at Bengaluru(suggestion for STATCOM), Gooty-Nelamangala overloading

etc and furnish to SRPC so it can be referred to SRSCT of CEA. SRLDC was also


requested to carry out system studies for STATCOM at Bengaluru ( as voltage

was going in both the directions).

3.6 Manual for recovery of Electrical Infrastructure during Natural Disaster

In the 35th SRPC Meeting, it was noted that the natural disasters are happening

every year in SR. SRPC had endorsed the need for having a Manual for recovery

of Electrical Infrastructure during disasters.

A Special Meeting to discuss on the same is scheduled to be conducted at SRPC

Bengaluru on 30.04.2019. Representation from SLDCs, Transmission wing and

DISCOMs was kindly to be ensured. The existing practices being followed by the

constituents/entities during disasters for recovery of Electrical Infrastructure during

disasters may kindly be shared.

In the Meeting, it was noted that no inputs had been received from any of the

states in this regard.

TANTRANSCO informed that a team of officers at different capacities are working

on the same and report would be submitted shortly. APTRANSCO informed that a

Meeting is scheduled and feedback will be furnished to SRPC.

SE(O), SRPC requested all the states to submit the inputs before the Meeting so

that it can be circulated among the constituents which may help in fruitful

discussion in the Meeting.

3.7 Scheduling of Pavagada Solar UMPP by SRLDC/Updates on other solar parks

Mock scheduling of Pavagada UMPP by SRLDC was to commence from

15.12.2018 (as discussed in the Meeting held on 02.11.2018).

AGEL vide letter dated 11.03.2019(Annexure-3M) had requested SRLDC to

expedite on transferring the scheduling jurisdiction of Kamuthi Solar Power

Projects(648 MW) from TNSLDC to SRLDC in accordance with IEGC Clause

6.4.2.(b)

SRLDC vide letter dated 20.03.2019(Annexure-3N) had requested for some

clarification from AGEL. AGEL vide letter dated 22.03.2019(Annexure-3O) had

replied to SRLDC letter.

In the Meeting the following were noted:


Scheduling of Pavagada Solar UMPP – KAR SLDC stated that the issues of

furnishing the actuals etc for the purpose of making mock accounts is being

expedited through KSPDCL. Some data format issues were getting addressed.

Ghani Solar Park: It was noted that Ghani Solar Park was an UMPP and

scheduling would need to be carried out by SRLDC. APTRANSCO informed that

the issue was scheduled to be discussed at SLDC within 15 days. SRLDC

agreed to send reminder letter in this regard. MS SRPC expressed concern that

after discussion in many meetings and reminders in this regard no action had

been initiated by APTRANSCO. It was agreed to hold a VC with APSLDC in

this regard.

Kamuthi Solar Power Projects(648 MW)-AGEL: TANTRANSCO raised different

PPA, connectivity issues etc and stated that the scheduling jurisdiction was to be

with TNSLDC. It was agreed to hold a separate meeting in this regard.

3.8 Relocation of SPS schemes

SR-I & SR-II had confirmed that all the new DTPCs have been commissioned at

the identified locations. All the states were requested to wire their inputs by

month end and furnish the compliance by next OCC meeting (refer Annexure

No. V of 77 PCSC MOM).

In the Meeting the following were noted:

SR-I & SR-II had confirmed that all the new DTPCs have been commissioned

at the identified locations. TN informed that by 25.04.2019 (except Karaikudi)

all the works would be completed. KSEBL informed that the works had been

completed. The following activities to be carried out:

Carryout the pending works (refer Annexure No.V of 77 PCSC MOM).

Carryout the mock drills in coordination with PGCIL and SRLDC.

Carryout the mapping of the feeders in coordination with SRLDC.

Furnish the revised list of feeders along with load reliefs under various SPS.

Communicate the compliance report in this regard to SRPC / SRLDC.

SRLDC informed that Gooty-Nelamangala, Gooty-Somanahalli and Hiriyur-

Nelamangala SPSs had been disabled. SR I confirmed that all the SPSs are

enabled. It was agreed to conduct the mock drill for Gooty-Nelamangala, Gooty-

Somanahalli and Hiriyur-Nelamangala SPSs on 30.04.2019.

Subsequently SRLDC vide E-mail dated 11.04.2019 had requested SR I to check

the healthiness of SPSs and communication link availability.


SR I vide E-mail dated 12.04.2019 had informed that they have checked the

healthiness of SPS and SPS is healthy. They had checked the SPS-9 signal

wiring and found that it is terminating in APTRANSCO MUX. It is requested to

check and confirm the SPS – 9 signal link between from APTRANSCO Gooty

MUX & Load/Gen per return mail.

3.9 SCADA Vs SEM issues

In the 153nd OCC after deliberations regarding the SCADA Vs SEM issues raised

by SR constituents all SLDCs (along with SCADA team) would periodically hold

VC with SRLDC and SR-I/SR-II to settle the issues with focused attention. SRLDC

would ensure participation from SCADA & Commercial Division. Issues raised by

SRLDC and specific issues would be circulated by SLDC prior to VC.

SRLDC/SLDC would analyse the node-wise discrepancy to identify and address

the persistent issues. The dates of VC would be communicated by SLDCs.

Specific issues, if any, may be brought out by all entities/constituents.

Error in SEM data on 16th & 17th March 2019

TANTRANSCO vide letter dated 03.04.2019 (Annexure-3P) had informed that

abnormal deviation had been observed between SCADA and SEM data from 70th

block of 16.03.2019 to 96th block of 17.03.2019 which leads to huge commercial

implications.

It was noted that as per SCADA data, there is only one violation during this period

where as SRPC DSM report 15 violations had been considered.

In the Meeting SRLDC informed the following:

SCADA Vs SEM drawl was analyzed for previous weeks from 4th March to

24th March 2019 and found that difference in SCADA drawl w.r.t. SEM drawl

has reduced compared to previous weeks.(Annexure-3Q)

Feedback given by constituents regarding telemetry, accuracy of data etc has

been incorporated.

Alternate data source (available) polarity has been checked and found OK, to

avoid any jump/erratic in drawl etc

Changes in drawl due to new element are being done, with prior intimation to

states.


SRLDC is ready to participate in VC called by states to discuss any drawl

related issues

SRLDC agreed to discuss the SCADA Vs SEM variation issue for 16/17.03.2019

bilaterally with TN. Whether any changes were there in TN drawal points after

NNTPP ICT commissioning etc needed to be analyzed. A difference of 140 MW

between SCADA and SEM data had been observed.

SRLDC stated that they were ready to hold VC to sort out the SCADA issues with

the states. The agenda would need to be communicated by the states.

3.10 Simhadri Islanding scheme

In 153rd OCC meeting, APTRANSCO had informed that the information about

islanding scheme for Simhadri had been communicated to their protection wing

and same would be discussed in the Protection Sub Committee meeting of SRPC.

However no feedback was given on the draft Simhadri Islanding Scheme during

82nd PCSC by APTRANSCO.

In the Meeting it was noted that the issue had not been raised by AP in the

Protection Committee Meeting. AP furnished the line loading details in regard to

the islanding scheme. It was noted that islanding scheme was needed for the

capital city of AP and it was required to be expedited.

AP SLDC to revert back on the draft Simhadri Islanding Scheme.

3.11 Delayed reporting of complete outage at 220kV Alipura Substation on 20.02.19

The complete outage of Alipura substation on 20.02.2019 was not reported by

KPTCL SLDC to SRLDC. Event was later reported by KPTCL protection wing on

14.03.2019 through email. This is a Violation of IEGC clause 5.2(d).

In the Meeting SRPC/SRLDC stated that this issue was viewed seriously as it

amounted to violation of IEGC provisions. KPTCL assured that mandated

procedure would be ensured in future.

3.12 Condenser mode of operation in other Hydro station

Exploring the possibility of running other state Hydro stations in condenser mode

operation considering the high renewable integration and associated MVAR

management requirement.


KPCL informed that with minor modifications, condenser mode of operation

is possible at Sharavathy and Varahi Stations. In respect to Kadra,

Nagjheri and Kodasalli, KPCL would explore the possibility and revert back

within one week.

TANTRANSCO informed that in Aliyar units are already used in condenser

mode. The possibility of using other hydro/gas stations in condenser mode

would be taken up with TANGEDCO.

All SLDCs are requested to take up the issue of using hydro/gas

stations in condenser mode with GENCOs and revert back before next

OCC.

3.13 KPTCL Over drawl at lower frequencies: (i) From the scatter plot of deviation Vs Frequency, it can be seen that there is

significant overdrawl by KPTCL at lower frequencies.

(ii) KPTCL is requested to restrict their over drawl at lower frequencies. (real

time messages issued to KPTCL is at Annexure-3R.

In the Meeting KPTCL informed that it happened because of tripping of Kudgi

Units and also due to RTPS reduced generation(around 400 MW) & BTPS(150

MW) due to coal handling issues. UPCL was also under generating. Due to

election and exams load shedding was not carried out.

3.14 Pending Payment to NTECL

In the Meeting NTECL requested TN, AP, TS and some of the DISCOMs of

KPTCL to make the pending payment to NTECL (pending total of around Rs 2,064

Crores).


3.15 Central Electricity Authority (Technical Standards for Connectivity to the Grid ) (Amendment) Regulations, 2019

The following clauses in the CEA(Technical Standards for connectivity to the Grid)

(Amendment) Regulations 2019 needed to be noted:

“B. Connectivity standards applicable to the wind generating stations, generating

stations using inverters, wind - solar photo voltaic hybrid systems and energy

storage systems.

(4) The generating stations with installed capacity of more than 10 MW

connected at voltage level of 33 kV and above –

(i) shall be equipped with the facility to control active power injection

in accordance with a set point, capable of being revised based on

directions of the State Load Dispatch Centre or Regional Load

Dispatch Centre, as the case may be;

(ii) shall have governors or frequency controllers of the units at a

droop of 3 to 6% and a dead band not exceeding ±0.03 Hz:

Provided that for frequency deviations in excess of 0.3 Hz, the

Generating Station shall have the facility to provide an immediate

(within 1 second) real power primary frequency response of at

least 10% of the maximum Alternating Current active power

capacity;

(iii) shall have the operating range of the frequency response and

regulation system from 10% to 100% of the maximum Alternating

Current active power capacity, corresponding to solar insolation or

wind speed, as the case may be;

(iv) shall be equipped with the facility for controlling the rate of change

of power output at a rate not more than ± 10% per minute.

(5) The generating stations of aggregate capacity of 500 MW and above

shall have the provision to receive the signal from the State Load

Dispatch Centre or Regional Load Dispatch Centre, as the case may be,

for varying active and reactive power output.


All entities were requested to note the same. SLDCs were requested to include the

provisions of the Amended Regulations in the State Connectivity

Regulations/Connectivity Agreements.

3.16 Deviation by States

SRLDC vide letters dated 02.04.2019(Annexure-3S) had communicated to

APTRANSCO, TSTRANSCO, KPTCL and TANTRANSCO regarding the deviation

in drawals beyond the limits during the period from 04.03.2019 to 31.03.2019.

All concerned entities were requested to take appropriate action in real time to

curtail sustained UD/OD and UI / OI on violation messages being issued by

SRLDC and report necessary compliance.

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

CEA is seeking updated information in respect of implementation of revised FGD

installation/ESP Up-gradation Plan. Status update is to be furnished in a time

bound manner.

In the Meeting held on 20.03.2019 at MoP, immediate need for the action plan for

compliance of environmental norms for the balance thermal capacity which is not

being monitored was discussed. CEA vide letter dated 26.03.2019 had furnished

the breakup of the capacities unmonitored along with the action required by the

concerned authorities:

AP: VTPS: Unit- I to VI (210 MW)

TN: Tuticorin TPS: Unit I to III (210 MW)

TS: Kothagudam (KTPS) Unit: XII(800 MW) (Newly commissioned)

SRPC vide letter dated 28.03.2018(Annexure-3T) enclosing CEA letter dated

26.03.2019 had requested all the concerned GENCOs/SLDCs to kindly furnish the

detailed status and compliance of the norms wherever applicable to CEA with a

copy to SRPC.

In the Meeting, it was noted that information had been received from all the

concerned and had been forwarded to CEA.

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

All the entities had furnished the details. NPC, CEA vide letter dated 06.03.2019

had furnished the summary record of discussions of the Meeting held with PGCIL


and POSOCO regarding ambient temperature adjusted TTC held on 05.02.2019.

It is noted that end equipment ratings are required for planning and operational

studies. SRPC vide letter dated 28.03.2019(Annexure-3U) enclosing CEA letter

dated 06.03.2019 had requested the concerned constituents (KPTCL,

TSTRANSCO and TANTRANSCO) to furnish the terminal equipment details of

the all 400 kV lines in the respective states by 02.04.2019 to NLDC/NPC &

CEA/SRPC.

It was noted that specific data sought by NLDC vide letter dated 28.01.2019 in

respect of transmission lines that are in the path of inter- regional power transfers

towards SR had already been communicated to NLDC on 09.03.2019. SRPC vide

letter dated 28.03.2019 (Annexure-3V) had requested NPC to impress upon

POSOCO to release the TTC Margins for SR based on the information furnished.

In the Meeting, KPTCL, TSTRANSCO and TANTRANSCO agreed to furnish the

information by 15.04.2019.

3.19 Report of the Committee to assess requirement of Regional Spares in Petition no. 38/TT/2017

A Committee was constituted to assess the requirement Regional Spares which

had submitted a Report to the Hon’ble CERC (Annexure-3W). Comments and

suggestions from the stake holders on the Report may be sent to CERC on or

before 29.03.2019.

OCC forum noted the above.

3.20 Deviations/zero crossing violations

Data in respect of deviations and zero crossing violations for the period

01.02.2019 to 28.02.2019 by SR entities as furnished by SRLDC vide letter dated

20.03.2019 is at Annexure-3X.

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

ISGS/State generators were suggested to improve the ramp rates.

Schedule revision: More ramp rate

NTECL vide E-mail dated 02.04.2019 informed that the schedule given to

NTECL for 12th block was 1212.96 and for 13th block was 1354.71 MW (increase

by 141.75 MW) which was not possible to adhere since NTECL ramp rate per

block is 112.05 MW. NTECL requested to revise the SG as per ramp rate.

The following was noted in the 153rd OCC Meeting:


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.

NTPC was requested to furnish the expert view of OEM. NTPC informed that

the issue was under consideration, had communicated in this regard to

Corporate office, and the details would be furnished at the earliest.

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 pointed out that enhancing of the ramp rates would result in further

savings in the SCED optimization. As per the Tariff Regulations, 2019-24,

POSOCO was to come out with a draft procedure on ramps (with

incentivization) by June 2019. The draft was under preparation. This was

to be implemented from April 2020.

In regard to NTECL request SRLDC agreed to look into the matter and

assured that in future it will be taken care.

3.22 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:

APTRANSCO: There was no further update on SRPC / TCC status.

TSTRANSCO: Final notification from TSERC was awaited.

KER: A meeting with RE developers would be held to finalize the

recommendations. Formal note would be submitted to Regulator most likely in

2 weeks. Instructions had been given to Solar generator of 50 MW in North

Kerala (low voltage area) to inject MVAR due to low voltages (around 10

MVAR). During the period, SLDC instruction, reactive charges are suspended.

In future, there may be some incentivization for reactive support.

TANTRANSCO: The Solar tariff as per TNERC Order was under consideration

of the management. The reactive billing for wind was yet to be taken up.

KPTCL: One Meeting of the committee had already been convened on

29.01.2019. Another Meeting of the committee will be convened shortly in

which the final recommendations would be finalized. Subsequently, the same

would be taken up with SERC through KEGC Review Panel.

It was suggested that in real time SLDCs may suspend the reactive

interchange charges in case of system requirements (till the voltage

based reactive billing is in place). Blanket approval in this regard for the

same may be obtained from the Higher Management by the SLDCs.


3.23 Daily Load Forecasting by SLDCs

SRLDC presented the error (forecast Vs actual demand) for the month of March 2019.

It was observed that all other states showed an error less than 8 % except in Kerala for one day where it was 12 %.

KSEBL informed that they will revert back on the same and felt that this may be due to some data error.

3.24 Renewable schedule entry and carrying out proper forecast and update ding intraday

In the 151st OCC Meeting, SRLDC/SLDCs were requested to come up with the

wind and solar forecast error computations (actual Vs forecast).

In the Meeting all SLDCs were requested to furnish the forecast, actuals and

forecast errors for wind and solar each month to SRLDC in a consolidated

manner. It was agreed that SRLDC would present the RE forecast errors for

all the states in the OCC regularly. It was noted that this data was being sought

by higher forums and other entities.

3.25 Accounting of NNTPS

In view of the commissioning of NNTPS Units of NLCIL shortly, to finalize on

accounting of NNTPS drawal/injection and TN drawal, a Special Meeting was

convened at Chennai on 25.03.2019 (Meeting Notice at Annexure-3Y).

SR II, PGCIL vide letter dated 29.03.2019(Annexure-3Z) had communicated to

TANTRANSCO regarding the delay in commissioning of 230 kV NLC-II – NLC

(TANTRANSCO) D/C line.

In the Meeting it was noted that minutes of the Meeting held on 25.03.2019 are

available at SRPC website.

3.26 Low Voltage issues in Karnataka and Kerala

The issues had been discussed in a VC held on 06.03.2019 and actionable points

by Karnataka, Kerala and PGCIL had been listed out. KSEBL is updating the

status on a daily basis to SRPC/SRLDC. In the 153rd OCC Meeting KPTCL was

requested to update on the status of UV relays in their system. The voltage

settings in the RPC controller at Kolar HVDC station had been changed to 395 kV

– 415 kV from existing 390 kV - 410 kV w.e.f 13:03 hours of 20.03.2019.

Status update by KSEBL, KPTCL & PGCIL


In the Meeting it was observed that low voltage issues have been reduced

considerably. PGCIL informed that the revised setting may be continued and there

was no adverse feedback on the same.

KPTCL was once again requested to update on the status of UV relays in their

system.

3.27 URTDSM project

SR-II had informed that standby link would be established after commissioning of

PDCs at Kolkata / NLDC by M/s GE.

All the constituents were requested to take action as firmed up in the meeting /

discussions held between 19.02.2019 to 21.02.2019

SRLDC had been requested to furnish the observations on URTDSM analytics.

In the Meeting SRLDC presented on Analytical Application Status and pending

issues(Annexure-3AA)

The following were noted:

5 applications had been installed at SRLDC. Applications at SLDCs would be

installed by end of April 2019.

Regular VCs (every 15 days) were being held with IIT, Mumbai and the

constituents.

Validation of LSE was being carried out. 765 kV system was converging and the

mapping issues at 400 kV were getting addressed.

Through VADR application operating Z information was getting captured and

would be shared.

Supervise Zone-3 application requires PMU at both the ends of the lines and

adjacent lines also. They were touch with PGCIL to identify the locations

meeting the criteria and the Pilot would be taken up at the selected locations.

LPE and CT/CVT calibration also required PMU at the both the ends and

presently 60 lines had been identified.

It was agreed that SRLDC would make a presentation on URTDSM

application output observations regularly in the OCC meeting. The

interaction with the SLDCs needed to be sustained for overall

understanding and the usage of the applications.

3.28 Deficit during peak hours from Talcher Stage II

KSEBL vide letter dated 19.02.2019 had communicated regarding the

downward revision of DC from Talcher Stage II on 19.02.2019. DC was revised

from 1400 MW to 1700 MW at 03:39 hours but at 13:05 hours DC was revised

downwards to 1350 MW which affected the LGB of Kerala during evening peak

hours.


In the 153rd OCC Meeting, NTPC was requested to revert back on intra-day DC

variation at Talcher II as raised by KSEBL.

In the Meeting, NTPC informed that the DC was raised since the strike was

called off but later due to a flash strike the supply was again affected and DC

reductions was resorted to. There was around 96 days strike during last year.

Talcher informed that present coal stock was around 2 days. MS SRPC

requested NTPC Talcher to furnish the details to SRPC which was agreed by

Talcher.

CE, KSEBL requested NTPC to give a formal letter to KSEBL so that they can

also escalate the issue to his higher ups.

3.29 Request for shifting of outage plan of generators

NTPC had requested Simhadri Unit-I (500 MW) planned S/D from 26.04.2019 to

14.06.2019 and in the 153rd OCC Meeting, NTPC was requested to coordinate

with AP & TS in this regard.

NTPC vide letter dated 21.03.2019(Annexure-3AB) had further informed that

the unit will be taken out for AOH from 26.04.2019 since the scope of work

includes Mandatory Boiler License Renewal which is expiring on 10.05.2019.

NTPC vide letter dated 28.03.2019(Annexure-3AC) had informed that the Unit

III of Ramagundam had been stopped on 28.03.2019 at 04:08 hours due to

sudden leakge from Drum manhole door. The AOH was planned from

13.04.2019 for 10 days. NTPC informed that after repairing this issue(expected

to take 2-3 days) the unit will continue out for AOH which include boiler license

renewal and preparatory R & M works of ESP(Total outage will be 10 days from

28.03.2019)

The shutdown proposal of NTPC Simhadri Unit I from 26th April 2019 was

deferred by TSTRANSCO citing the peak load conditions in the state. NTPC

vide letter dated 21.03.2019 had requested for approve the same since the

boiler license expires on 10.05.2019.

TSTRANSCO vide letter dated 04.04.2019 (Annexure-3AD) had informed that

taking into account the interest of boiler safety the proposal for AOH is accepted

from 10.05.2019, however it was requested to NTPC that in future, any planned

outage is not programmed during peak season and may be planned during off

peak season in consultation with the constituents.

In the Meeting Simhadri Unit-I (500 MW) shutdown was agreed from 10.05.2019

to 28.06.2019.


3.30 NTPL – Forced outage of Unit – II

NTPL vide letter dated 26.03.2019 (Annexure-3AE) had furnished the action

plan/progress of action plan to revive the unit. The unit had tripped due to

Generator Protection on 16.01.2019. Stator repair work had been awarded to

BHEL and tentative completion of work is given as 31.05.2019. The Unit is

expected to be synchronized on 15.06.2019.

OCC noted the above.

3.31 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.

In the 153rd OCC Meeting, it was noted the realized relief was less in both the

incidents (07.02.2019: Talcher-Kolar SPS and 08.02.2019: KKNPP U-2 SPS).

States were requested to revert back with action taken report by next OCC.

In the Meeting states were again requested to revert back on the same.

SRLDC vide letter dated 05.04.2019 (Annexure-3AF) had furnished the SPS

operation during March 2019. It was noted that Talcher-Kolar Pole II tripped on

line fault on 12.03.2019 and the SPS acted as per logic. Total load relief was 1195

MW against the designed value of 879 MW(AP-350 (230), KAR-450(250), TN-

395(399)). On 18.03.2019 Raichur-Sholapur Line I tripped on Y-N fault bur SPS

logic was not met and not operated.

3.32 REMC Project in SR-Non readiness of space by KPTCL/ Failure of KPTCL underground fiber links in Bengaluru intra-city

SR II vide letter dated 22.03.2019 had requested KPTCL to arrange for early

completion of the interiors to commence the installation and further commissioning

of the systems to complete the work at the earliest. It was noted that the progress

of the same is being monitored closely by MoP and the commitment was to

commission the system by March 2019.

KPTCL vide E-mail dated 28.03.2019 had informed that interior work is in progress

and in week’s time PGCIL can start installing LVS and from April 15th onwards


can start installing Server and other HW and offered necessary

coordination/support from KPTCL for installation.

In the Meeting, KPTCL informed that 15th April onwards, PGCIL could start with

installation of LVS (UPS power would be available). Installation of Server and

other HW could be taken up from 01.05.2019 and offered necessary

coordination/support from KPTCL. SR II requested KPTCL to render all

assistance.

SR-II informed that 4th link to SRLDC (through Hebbal) had been established.

SRLDC agreed to revert back after verification.

For rectification of OF cable between HSR to NIMHANS, EDC to NIMHANS and

EDC to HAL,KPTCL informed that the agency has been identified to carry out the

works.

3.33 Issues w.r.t KGS

In the 153rd OCC Meeting, KGS had highlighted the following issues with respect

to KGS

Replacement of all SEM Meters with single model SEM Meters to avoid

maintaining of different DCDs, failure of DCD and for facilitating auto down

loading facility. Totally twenty-two SEM meters are provided for Energy

recording. Out of that 15 Nos are ENTITY-E3M021 (without Auto

Downloading) and 07 Nos are L&T ER-300P with auto downloading facility.

SEM related issues would be again taken up by Kaiga GS with SR-II with

a copy to SRPC.

In the Meeting it was noted that Kaiga GS had taken up the issue vide

letter dated 09.04.2019.

Replacement of old insulators on Kaiga-Guttur circuits to avoid repeated

tripping of Kaiga-Guttur lines due to insulators flash over.

KPTCL 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-1 and line-2 for which, the estimation was under

preparation.

KPTCL informed that the estimate had been prepared and would be

taken up for approval.


Commissioning of OPGW circuit through Guttur circuit. Presently Narendra

circuit made through with one channel.

SR-II was requested to address the card issues of Terminal equipments

at Guttur end.

Kaiga GS had taken up the issue vide letter dated 09.04.2019.

Attending of deficiency in PLCC speech communication from KGS to

Guttur, Kadra, Kodasalli, Narendra by KPTCL Kaiga GS and KPTCL

agreed to coordinate the PLCC communication issues.

There was no update.

Rectification of RTU Kaiga end board level/configuration issues for

SCADA data availability to SRLDC control room Bangalore.

(SCADA discrepancies -220 KV bus I & II voltages & frequency and KGS

3 & 4 SUT TAP position at Kaiga are reporting with error at SRLDC.)

RTU issues to be raised by Kaiga GS with SR-II with a copy to SRPC.

SR-II was requested to address the issues.

Kaiga GS had taken up the issue vide letter dated 09.04.2019.

3.34 Resource Adequacy Index and Flexibility Index

In the 153rd OCC Meeting, SRLDC had presented the formulae for calculation of

different indices. All SLDCs had been kindly requested to revert back with

observations/suggestions.

In the Meeting, SRLDC informed that for Southern Region the same was being

integrated in the SCADA. Subsequently on similar lines it could be integrated in

the SLDCs SCADA (SRLDC would render assistance). SRLDC agreed to

furnish the details (including soft copy) in this regard to SLDCs along with

the instructions to compute the indices.

3.35 Communication Audit

A special meeting is scheduled on 16.04.2019 (Meeting notice at Annexure-3AG)

at SRPC Bengaluru. All the entities are requested to furnish the information in the

required format by 10th April 2019.

In the Meeting it was noted that the Meeting had been postponed to 25.04.2019.

SRPC requested all entities to furnish the required information at the earliest.


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

IT Division, CEA vide letter dated 31.01.2019 had advised all Sectoral CERTs,

Utilities/Organizations to report CISO MoP after conducting Audit and

Vulnerability Assessment and Penetration Testing(VAPT) of all ICT infrastructure,

website, web application etc at the earliest. All entities to carry out periodical

audit and VAPT testing on ICT infrastructure. Copy of the audit report / VAPT

testing is to be communicated to CISO MoP (Chief Engineer, IT, CEA) at the

earliest (copy of the report may also be furnished to SRPC). Further, as per

CERC Communication Regulation, Cyber Security Audit is to be carried out for the

year 2018-19.

Further Under Secretary (IT), MoP vide letter dated 13.03.2019 had

communicated in this regard. It was requested to kindly arrange to take action for

strictly monitoring and preventing cyber intrusions in the ICT infra-structure of the

concerned organisation. Cyber intrusions of any nature also needed to be

reported immediately to the office of the National Cyber Security

Coordinator as mentioned in the attached letter with a copy to SRPC.

3.37 Rejuvenation and Parallel operation of 220 KV System on NEW-SR Corridor

A Joint Study meeting was held on 24th December 2018 regarding the rejuvenation

of Chikkodi – Talangade & Chikkodi - Mudhsinghi Lines.

KPTCL had expressed some apprehension in closing the lines and had informed

that they had submitted the report to the Higher Management and approval was

awaited.

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

In the 153rd OCC Meeting SRLDC had informed that 5 bidders have been qualified

among 9 bidders and financial bids are to be opened. SLDCs were requested to

appraise the generators on testing of Primary frequency response.

3.39 AGC at state Level- Pilot Project identification & Implementation

A Meeting was carried out on 14.03.2019 at SRPC and the minutes of the Meeting

are available at SRPC website.

3.40 Declaring COD of new bays at Vemagiri

SRTS I vide letter dated 23.02.2019(Annexure-3AH) had requested that

considering utilization of all four nos 240 MVAR reactors and associated bays for


voltage control, permission may be granted for declaring DOCO of the new CTU

bays at Vemagiri. SRLDC after simulation studies had concluded that with 2 x 240

MVAR reactors in service voltage at 765 kV Vemagiri will come down by 10 kV

from the prevailing Grid Voltage. SRPC had put up the same for approval of

Chairperson, SRPC. SRPC vide letter dated 15.03.2019(Annexure-3AI) had

communicated in this regard to SRTS I.

OCC noted the above.

3.41 Installation of 2x125 MVAR bus reactors at UPCL

In the 153rd OCC Meeting, it was noted that KPTCL needs to clearly communicate

Standing Committee approval details, meeting number etc to PCKL.

3.42 Reactor commissioning at Kaiga GS

In the 153rd OCC Meeting, KGS informed that FS for both the reactors has been

received. In the Meeting it was noted that tender for both the reactors together

would be floated within 15 days by HQ.

3.43 Prolonged Outage -KKNPP Reactors:

In the Meeting, KKNPP had informed that financial sanction is expected by March

2019 end for the second reactor and is expected to be commissioned by

December 2019.

3.44 NLC Complex: HTLS associated enhancement works

SR-II informed that the HTLS works would be taken up in 3rd week of April 2019.

3.45 High voltages in Telangana System /Frequent switching of lines / Bus reactors/ MVAR interchange of generators

SRPC had analyzed the nodes of high voltage coupled with MVAR injection during

August 2018 to November 2018 and the following was observed:

Nodes with MVAR injection during V > 103%

AP KAR TN TS

Kurnool Nelamangala Tiruneveli Maheshwaram

Vijayawada Raichur Alamathy Hyderabad

Gazuwaka Hoody Karaikudi Malkaram

Chittoor Pugalur Gajwel

Vemagiri Kalavinthapattu Mehaboobnagar

S V Chatram Khammam


Warangal

Dichipally

All entities were requested to kindly take appropriate action.

SRLDC had agreed to take up the issues related to MVAR interchange of

state generators with SLDCs and ISTS connected generators.

3.46 Requirement of power flow and dynamic data

In the 151st OCC Meeting, SRLDC had presented the requirement of power flow

and dynamic data for modeling renewable energy generation in Indian grid.

Indian power system is undergoing a systemic change towards integration of 175

GW of generation from RE sources. In the Meeting SRLDC had informed that

no information has been received till date and entities were kindly requested

to furnish the information by end of April 2019. It was noted once again that

these requirements should be made part of connectivity agreement and

ensured at the time of approving connectivity for the upcoming RE generators.

3.47 Diesel plants in SR-Information requested by CEA

CEA vide letter dated 11.03.2019 had requested some information(formats

circulated in OCC Group/153rd OCC Minutes) regarding diesel stations in SR. The

data for the above report may be sent on email: - [email protected],

[email protected].

For Southern Region the information regarding the following stations is to be

furnished.

AP – LVS, KAR-Bellary. Yelahanka, Kerala – Brahmapuram &

Kozhikode, TN – Samalpatty , Samayanallur & Basin Bridge.

Any decommissioning/ Fuel transformation also may be informed

accordingly. The mail received from CEA had been forwarded to OCC

Group. The required data may be kindly furnished to CEA with a copy to

SRPC.

3.48 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

mailto:[email protected]



SRLDC. SRLDC would communicate the details by 3rd week. SRPC would issue

the certificate by month end. The status in this regard is as follows :

Inter state lines Period SRLDC SRPC Comments

AP-KAR

220 kV Alipura - Regulapadu

Jan - June 2018

Submitted Certified

July - Nov 2018

Submitted Certified

AP-TN

220 kV Chittoor - Thiruvalam

Jan - June 2018

Submitted Certified

July - Sept 2018

Submitted Certified

Oct - Nov 2018

Submitted Certified

220 kV Sullurpet - Gummidipoondi

Jan - June 2018

Submitted Certified

July - Sept 2018

Submitted Certified

Oct - Nov 2018

Submitted Certified

TN-KAR

220 kV Yerrandahalli - Hosur

Jan - June 2018

Submitted Certified

July - Nov 2018

Submitted Certified

KAR-KER

220 kV Kadakola - Kaniyampetta

Jan - June 2018

Submitted Certified

July - Nov 2018

Submitted Clarifications received

110 kV Konaje - Manjeswaram

Jan - Nov 2018


KER-TN

220 kV Sabarigiri - Theni

Jan - June 2018

Submitted Certified


July - Sept 2018

Submitted Certified

Oct - Nov 2018

Submitted Certified

220 kV Idukki - Udumalpet

Jan - June 2018

Submitted Certified

July - Sept 2018

Submitted Certified

Oct - Nov 2018

Submitted Certified

110 kV Kuzhithurai - Parassala

Jan - Sept 2018

Submitted Certified

Oct - Nov 2018

Submitted Certified

TS - KAR

220 kV Tandur - Sedam

Jan - Nov 2018


Non ISTS(PoC lines)

AP System April - Sept 2018

Submitted Clarifications received from APTRANSCO

TS System Jan - Nov 2018

Submitted Clarifications on bay ownership awaited from TSTRANSCO

KAR System Jan - Dec 2018

Submitted Certified

KAR System Jan - March 2018

Awaited KPTCL furnished the data for 5 lines for the period Jan-Mar 2018.

TN System Jan - Nov 2018

Submitted Certified

TN System Dec - Jan 2019

Submitted Certified

Note:

1. AP - TS interstate lines data is awaited

2. PED to submit the Outage data for 2 Non ISTS lines


3.49 Furnishing of Details of Single Bus Operation

In the Meeting, all concerned entities were requested to furnish the details of

single bus operation (wherever due) by 30.04.2019 .

3.50 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 154th

Meeting of OCC:

State SCADA availability as on

31.03.2019 Mapped I/C

Remarks

AP Wind: 4075/3908 MW (96%)

Solar: 2991/2033 MW (68%)

Total: 7066/5941 MW (84%)

Pending SCADA availability was

for RE connected distribution level

and for which action had been

taken for compliance.

TS Wind: 128.1/128.1 MW (100%)

Solar: 3479/3376 MW (97%)

Total: 3608/3504 MW (97%)

Action for balance SCADA

availability at 33 kV and below was

being followed up and notices had

been issued.

KA Wind: 4795/4751 MW (99%)

Solar: 5139/4602 MW (90%)

Total: 9934/9353 MW (94%)

KE Wind: 60/17 MW (28%)

Solar: 93/85 MW (91%)

Total: 153/102 MW (66%)

TN Wind: 8746/8571 MW (98%)

Solar: 2495/648 MW (26%)

Total: 11241/9219 MW (82%)

Notices had been issued for SS

under 10(1) for SCADA availability.

100% SCADA availability of wind

was likely to be ensured by

December 2017. TANTRANSCO

(Communication) and TANGEDCO

(Metering) had jointly initiated

action for Solar SCADA availability

and was targeted to be completed

by July 2018.

SR Wind: 17804/17375 MW (98%)

Solar: 14197/10743 MW (76%)

Total: 32001/28118 MW (88%)

3.51 Representation from MNRE for SRPC Meetings

In the 35th SRPC Meeting held on 02.02.2019, a number of RE related issues

were discussed and the forum felt for the participation of MNRE in future SRPC


Meetings which would be of much value addition. Accordingly Chairperson, SRPC

vide letter dated 21.03.2019(Annexure-3AJ) had requested Secretary, MNRE to

kindly direct MNRE officers to participate in the future Meetings of SRPC.

3.52 Monitoring of scheme funded from PSDF

The status (as on 31.03.2019) as received from NPC is at Annexure-3AK. All the

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

manner.

3.53 PSS Tuning of generators

6th Meeting of PSS Tuning had been convened on 27.09.2018. Minutes are

available at SRPC website. Analysis and recommendations are to be referred to

take necessary action. The schedule for next SRT is also mentioned in the

Minutes. All the concerned were again requested to take appropriate action in this

regard. (Refer Table-I). PSS tuning for around 80 units is to be carried out during

2019 and action had to be initiated in this regard (kindly refer 6th PSS minutes

available at SRPC website).

3.54 All the STUs were requested to follow-up the Railways linked Substation/lines as

discussed in the Special SRPC meeting held on 17.12.2018/35th SRPC

(02.02.2019) and furnish monthly updates to SRPC.

3.55 On a query by KPTCL, SR-II informed that the Hiriyur-Mysore line was expected by

July 2019. SR-II informed that for construction of Pavagada-Devanahalli line (M/C)

shutdown of Yelahanka-Hoody and Nelamangala-Hoody was planned for 10 days

in May 2019 and subsequently 4 months shutdown was required. It was noted the

shutdown would be discussed in the next meeting.

4. Outage Proposals/LGBR 4.1 Issues faced in processing the outages between OCC & Mid Review – OCC

Outages were discussed and processed through VC on 08.04.2019

4.2 LGBR for upcoming five months & TTC/ATC computations

All states had furnished PSSE base case for August 2019 and following is the

status:

State 5 months

LGB

Converged

PSSE

Base case

ATC/TTC

Computation

furnished to

SRLDC

ATC/TTC

Computation

posted on

SLDC

website

Nodal

Officer

Status

AP Submitted No Nil No


TS

All

Furnished

Submitted Yes

KAR Submitted. No

TN Submitted Yes

KER Submitted Yes

SRLDC & SRPC 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.

5. Availability and Requirement

Availability and requirement for the period from April 2019 to August 2019 is

given at Annexure-5A.

6. REVIEW OF THE POWER SUPPLY POSITION

Grid Highlights

Frequency remained within IEGC range during March 2019 (49.90 - 50.05 Hz)

for 71.20 % of time. Average frequency for the month was 49.99 Hz.

Frequency remained below 49.90 Hz for 9.30 % of time during March 2019.

Frequency remained above 50.05 Hz for 19.50% of time during March 2019.

Southern region demand touched all time high of 49534 MW on 29th March

2019 at 11:44 Hrs.

Southern region daily consumption touched all time high of 1129 MU on 29th

March 2019.

Karnataka met highest demand of 12881 MW

Pilot SCED implementation as per CERC order 02/SM/2019, it is a humble

beginning towards pan India optimisation for CS ISGS generators (Section 62

plants).

14 MW (Wind) &150 MW (Solar) were added to Andhra Pradesh Installed

Capacity (Private Sector).

Andhra Pradesh, Telangana, Karnataka & Tamil Nadu imported 313 MU, 682

MU, 151 MU & 1322 MU respectively intra-regionally through bilateral

exchanges.

Andhra Pradesh, Telangana, Karnataka & Tamil Nadu exported 1478 MU, 41

MU, 224 MU, 725 MU & respectively intra-regionally through bilateral

exchanges.

Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil

Nadu & Puducherry imported 199 MU, 615 MU, 57 MU, 50 MU & 306 MU

respectively through Power Exchange.


Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil

Nadu, TPCIL, IL& FS & SGPL Unit I exported 53 MU, 91 MU, 53 MU, 04 MU,

22 MU, 35 MU, 0.894 MU, & 97 MU respectively through Power Exchange.

2nd PTR at 220/132kV SS Atmakur in Nellore district (100 MVA) was

commissioned on 08.03.2019 by APTRANSCO.

LILO of 220kV RSS – Nagaram I at Ramagundam Fertilizers and chemicals

Limited (RFCL) (25 Ckm ) was commissioned on 30.03.2019 by TSTRANSCO

220/11 kV Annaram LIS SS in Karimnagar district (250 MVA) was

commissioned on 14.03.2019 by TSTRANSCO.

SR II, Power grid vide letter dated 12.04.2019 (Annexure-6A) had informed

that consequent to the successful completion of Trial Operation, as per the

certificate to that effect issued by SRLDC , the following assets under

“Transmission System for Ultra Mega Solar Power Park at Tumkur

(Pavagada), Karnataka – Phase II (Part –A)” have been put under

Commercial Operation w.e.f 00:00 hrs of 31st March 2019 in terms of clause

4 of CERC (Terms and Conditions of Tariff Regulations, 2014).

1 no. 500 MVA 400/220kV transformer along with its associated bays and equipment’s at Tumkur (Pavagada) pooling Station.

Transmission charges for the above assets are payable with effect from 31st March 2019.

SRLDC vide letter dated 27.03.2019 (Annexure- 6B) had informed that Fiber

Optic Communication system for OPGW link “ Salem PS (Dharmapuri) –

Madhugiri (Tumkur)” declared for commercial operation vide ref in accordance

with Regulation 5 of CERC (Terms and conditions of Tariff) Regulations 2014

as on 19.03.2019.

7.1 High frequency

It was noted that the Regional Grid had operated above IEGC range i.e.50.05 Hz for

19.50 % 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 50.28 Hz at 04:35 hrs

hours of 1st March 2019. (Graph at Annexure-7A).

SRLDC presented the underdrawal of states when frequency was above 50.05 Hz.

(Annexure-7B). The maximum Under-drawals touched by States during March

2019 also was presented. (Refer Table V of Appendix)

Constituents were advised to kindly avoid uneconomic operation at high

frequencies. MS, SRPC requested all the constituents that action needs be taken to

adhere to the schedule since it had commercial/operational impacts even for

underdrawal.


7.2 Pump mode operation

It was noted that there was consumption of 23.47, 0.00 & 13.54 MU in pump mode

for N’Sagar, Srisailam and Kadamparai stations respectively during the month of

February 2019.

7.3 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 9.30 % of time during

the month (Refer Table-VI of Appendix).

SRLDC informed that minimum frequency touched 49.648 Hz at 20:39 hrs on 10th

March 2019. It was observed that over drawals of Southern Regional states at that

instance were within limit (Graph at Annexure-7C).

Overdrawal by SR constituents at frequency less than 49.90 Hz (Annexure-7D) was

presented by SRLDC. The maximum over-drawals touched by States also was

presented.(Refer Table VII of Appendix).

8 VOLTAGE PROFILE

8.1 Low voltage

In the meeting, it was noted that low voltage had been observed at few nodes in

March 2019. It was observed that voltage profile had been improved compared to

last month.

Details of Capacitors installed during February 2019 are at Annexure-8A. Details of

the healthy/faulty capacitors to be furnished.

8.2 High Voltage

SRLDC informed that there was not severe high voltage problem except in some

of the nodes in Telangana(Refer Table VIII of Appendix)

8.2.1 Status review of GT Tap positions

GT tap Positions – GT taps yet to be changed as per recommendation (Refer

Table-IX of Appendix)

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

Status of implementation of Bus / Line Reactors approved in the Standing

Committee / SRPC pending for commissioning 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.


8.2.3 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.

8.2.4 MVAR interchange/Testing

MVAR interchange meeting was convened on 26.09.2018. Minutes of the Meeting

are available at SRPC website.

SRLDC informed that MVAR testing for Rayalseema Unit VI, Kudgi and IL & FS

would be taken up this year.

9 Network Protection/Security issues

9.1 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 March 2019 as

follows: (Detailed Presentation is at Annexure-9A)

AP: 83%, TS: 112%, KAR: 89, KER: 89%, TN: 92%, Pudu: 106% & SR : 93%.

SRLDC informed that validated list of feeders had been shared in google spread

sheet. Any change in details is to be uploaded in feeders update and change sheet

and to be updated with the date of updation. Feeder wise monthly average MW file

to be filled and sent for January 2019 to March 2019.

9.2 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 115 RTUs have been

received and would be commissioned within 6

months(UFR and df/dt mapping and visibility would

improve).

TS 77 For 29 RTUs, Orders had been placed. By October end supply is expected. 92-93% visualization is expected by commissioning of these RTUs. There is an additional requirement of 11 RTUs for railway feeders also.(earlier 18 RTUs) With this they were likely to achieve 100% mapping. & PSDF fund is


requested for balance 7 RTUs (for achieving 100 %).

KAR 100

KER 100

TN 88

Pudu 92

SR 94

9.3 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)

During the month of March 2019 there were 13 incidences when frequency was

below 49.85 Hz.

The incident which satisfied the ADMS logic (OD<49.85 HZ.) was only 1 (in

Karnataka) during the month. It was noted that on 27th of March 2019, ADMS acted

at 22:36 hours (frequency was 49.74 Hz.). Load relief visible was 29 MW. From the

data it was observed that in the next minute, loads had been connected again.

It was pointed out that any loads tripped under ADMS should be brought back only

under the directions of SLDC keeping in view the frequency, overdrawal etc.

In the Meeting all the SLDCs were requested to revert back on increasing the

quantum based on the sustained overdrawal and the maximum deviation limit. It

may also to be seen that whether the tripping can be done through SCADA. Further,

whether frequency logic was to be removed would be discussed in the next OCC

meeting. SRLDC was again requested to come up with the proposal for increase in

the ADMS quantum.

ADMS feeders may also be mapped, for enhanced visualization and analysis of

ADMS operation.

9.4 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.

9.5 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.

Petition No.237/MP/2017along with I.A. No. 11/2018- ROP of the hearing on

31.01.2019

Petition No.237/MP/2017along with I.A. No. 11/2018 for seeking extension of

time prescribed for implementation of the CERC Order dated 5th January, 2016

in Petition No. 420/MP/2014 was heard on 31.01.2019 and in the RoP the

following were noted:

After hearing the learned counsel for the Petitioner and the Representatives

of the Respondents, the Commission directed the Petitioner to approach all

the State Commissions for tariff adjustment proposal.

Commission further directed the POSOCO to submit the States WTG-wise

data containing (i) population of wind turbines as per models, make and

voltage levels, and (ii) details of LVRT enabled, LVRT design supported and

fitted to be enabled, LVRT design supported but to be fitted and LVRT to be

retrofitted.

Commission had directed the CEA to submit the study regarding technical

feasibility of installation of LVRT in WTG in terms of the order dated

05.01.2016 in Petition No.420/MP/2014.

Commission had observed that the Wind Power Developers should approach

the concerned SERCs for allowing the cost of retrofitting, WTGs-wise LVRT

in terms of the applicable regulations of the SERCs and the PPAs.

Commission had directed POSOCO to coordinate with the RPCs for taking

up a consolidated case for funding from PSDF/Green Fund for retrofitting


WTGs with LVRT in terms of order dated 05.01.2016 in Petition No.

420/MP/2014.

Commission had directed the parties to file the above information within one

month from the issue of the ROP.

Commission had directed that the interim direction dated 10.04.2018 shall be

continued till the disposal of the Petition.

10 Emergency Restoration System (ERS)

The status was updated in the 34th TCC Meeting held on 01.01.2019 which is at

Table

11 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.

This had been deliberated in the Item No. 3.9

12 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.

12.1 Black Start Mock Drill

Mock drills conducted in March 2019.

Mock drills scheduled for April 2019 to June 2019 and from July 2019 to

December 2019.

Point to point mock exercise for black start by all constituents

TSTRANSCO had informed that TSGENCO was planning to procure DG set of

appropriate capacity for Jurala HEP.

Mock test at Bhadravathi will be carried out by May/June 2019. Dates would be

coordinated by SRLDC.

KPTCL has submitted the plan for BSRP for Hydro Stations.

13 RGMO/FGMO

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.

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


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.

SLDCs/SRLDC were requested to take action to comply the IEGC Amendment.

Special Meeting had been convened on 26.08.2018 at SRPC Bengaluru to

discuss on FGMO/RGMO related issues. Minutes of the Meeting are available

at SRPC website.

14 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.

15 Wind/solar Generation

SRLDC presented the day-wise Wind Generation pattern in Andhra Pradesh,

Karnataka & Tamil Nadu during the period 1st March 2019 to 31st March 2019.

Wind generation in Andhra Pradesh had varied between 31.55 MU (16.03.2019)

to 5.83 MU (08.03.2019). Wind generation in Karnataka had varied between

19.43 MU (05.03.2019) to 5.84 MU (01.03.2019). Wind generation in Tamil

Nadu had varied between 13.92 MU (14.03.2019) to 3.38 MU (10.03.2019)

(Annexure-15A).

SRLDC presented the day-wise Solar Generation pattern in Andhra Pradesh,

Telangana, Karnataka & Tamil Nadu during the period 1st March 2019 to 31st

March 2019. Solar generation in Andhra Pradesh had varied between 14.57

MU (17.03.2019) to 11.04 MU (10.03.2019). Solar generation in Telangana had

varied between 22.97 MU (06.03.2019) to 19.19 MU (02.03.2019). Solar

generation in Karnataka had varied between 36.55 MU (26.03.2019) to 29.79

MU (02.03.2019). Solar generation in Tamil Nadu had varied between 14.11

MU (28.03.2019) to 10.30 MU (04.03.2019). (Annexure-15B).


16 Vote of Thanks

Member Secretary, SRPC thanked all the participants for their active

participation in the Meeting.

17 Date & Venue of the next Meeting

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

Meeting : 155th OCC of SRPC

Date : 09.05.2019 (Thursday)

Time : 10:00 Hours

Venue : SRPC, Bengaluru

*********************

Appendix

Follow up Issues

REMC Project Training 4th

and 5th

modules completed in July 2018.6th

module on RE

forecasting completed in August 2018. 7th

and 8th

module on system

hardware is scheduled in December 2018

VC facility Puducherry to take up VC requirement in 2018-19

Closing of 220 kV Upper

Sileru- Balimela line

Idle charged from 8th

January 2015 from Upper Sileru end.

PMU Status

PGCIL informed that a separate meeting will be called to discuss

on the second stage after stream lining/usage of the first stage.

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

28 14 10 09 01 25

No of shut downs carried

out as per schedule

15 13 03 07 0 24

No of shut downs

deferred

13 01 07 02 01 01

Percentage of shut down

carried out

54 92 30

78 0 96 78


TABLE – II

Status of shut down availed against shut down approved as furnished by SRLDC is as below:

AP KA

R

RST

CL

KE

R

PNM

TL

NLC NT

PC

MEL UP

CL

TN TS SR

I

SR

II

NP

CI

L

SR

54 30 0 100 0 0 0 100 0 0 73 64 56 100 57

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 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]

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; NTPC-Kudgi U3; 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- Mar-19 27.25 0.69

02- Mar-19 27.48 0.07


04- Mar-19 22.13 0.22

07- Mar-19 9.42 0.01

10- Mar-19 14.72 0.07

12- Mar-19 14.76 0.06

13- Mar-19 15.26 0.13

15- Mar-19 14.86 0.13

16- Mar-19 25.63 0.28

17- Mar-19 21.79 0.01

18- Mar-19 27.78 0.16

19- Mar-19 21.34 0.04

21- Mar-19 34.58 0.15

24- Mar-19 25.50 0.23

26- Mar-19 28.76 0.24

27- Mar-19 20.30 0.06

30- Mar-19 21.22 0.48

31- Mar-19 37.12 0.63

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 729 08 23.03.2019

TS 792 31 10.03.2019

KAR 795 20 07.03.2019

KER 171 02 03.03.2019

TN 774 05 08.03.2019


Table VI: Frequency less than 49.90 Hz for significant duration

Table VII: The Maximum over drawal touched by States are as follows

State MW Duration Date

AP 756 21 25.03.2019

TS 797 22 23.03.2019

KAR 799 60 27.03.2019

KER 280 02 20.03.2019

TN 531 09 19.03.2019

Table: VIII: High Voltage Nodes

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- Mar-19 0.00 0.00 0.00 0.96 4.33

03- Mar-19 0.00 0.00 0.00 1.23 11.08

04- Mar-19 0.00 0.00 0.00 0.60 12.58

05- Mar-19 0.00 0.00 0.20 1.40 20.80

07- Mar-19 0.00 0.00 0.00 1.22 20.15

08- Mar-19 0.00 0.00 0.00 0.91 13.61

09- Mar-19 0.00 0.00 0.13 3.76 24.73

10- Mar-19 0.00 0.00 0.24 0.79 15.30

11- Mar-19 0.00 0.00 0.15 2.99 11.26

12- Mar-19 0.00 0.00 0.00 0.88 11.69

17- Mar-19 0.00 0.00 0.00 0.35 8.01

21- Mar-19 0.00 0.00 0.00 0.49 4.79

22- Mar-19 0.00 0.00 0.00 0.41 5.20

25- Mar-19 0.00 0.00 0.00 0.35 6.01

26- Mar-19 0.00 0.00 0.00 1.26 4.76

27- Mar-19 0.00 0.00 0.00 1.24 6.25

28- Mar-19 0.00 0.00 0.00 3.00 14.10

STATION

MAX VOLTAGE

IN KV

AVERAGE DURATION IN

MINUTES PER DAY WHEN

V > 420 KV/ V > 780KV

Vijayawada 424 54

N’ Sagar 428 314

Hyderabad 426 216


Table: VIII: Low Voltage Nodes

STATION

MAX VOLTAGE

IN KV

AVERAGE DURATION

IN

MINUTES PER DAY

WHEN

V > 420 KV/ V > 780KV

Bangalore 366 57

Trichur 373 19

Pallakad 375 35

Cochin 377 32

Nelamangala 367 42

Bidadi 370 44

Hosur 372 69

Gooty 430 437

Kurnool 430 300

Khammam 428 346

Srisailam 435 1201

Hiriyur 435 519

Guttur 426 16

Raichur 424 45

Kaiga 423 18

Narendra 430 187

Pugalur 422 72

Malkaram 434 1037

Sattenapally 432 915

Almatty 427 382

Mysore 429 29

Hassan 427 23

Mehboob Nagar 435 1096

Raichur TPS 765 803 05

Kurnool 765 809 19

Tiruvalam 765 817 380

Nizambad 765 806 31


Table-IX - GT Tap: Recommended/Implemented

Station

Unit Present Tap

And

Corresponding

Voltage(In kV)

Recomme

nded Tap

And

Correspon

ding

Voltage(In

kV)

Remarks

ISTS connected Generators:

Kaiga I 1 & 2 6 & 229.125 7 & 223.25 MVAR interchange as per

Special Meeting to be ensured. Kaiga II 3 & 4 3 & 409.5 4 & 399

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 35th

SRPC

Entity Bus Name Status REMARKS

KPTCL

Hoody Reactor erected on

platform.

34th

TCC:

March 2019

Nelamangala Reactor erected on

platform

34th

TCC:

March 2019

Entity Bus Name

Capacit

y in

MVAR

Approved

in Type Remarks

PGCIL

Yelahanka 2x63 40th

SC Bus

PGCIL (Nov 18): Award

placed in May 2018;

expected by June 2019

Cuddapah 50 to 125 39th

SC Commissioned in Oct

2018

Kurnool 765 kV 2 x 240 2

nd reactor commissioned

on 31.10.2018

Raichur 765 kV 2 x 240 2


on 31.10.2018

Nellore 765 kV 2


on 31.10.2018

Thiruvalam 765

kV 2 x 240

42nd

SCPSPSR. 27 months

from April 2017.

Pavagada 2 x 125 42nd

SCPSPSR.

Nellore (PG) 2 x 50

42

nd SC

Line

to

Bus

Hosur 63 to 125 42

nd SC/1

st

SRSCT Bus

1st SRSCT: agreed for

implementation.

Madhugiri 63 to 125 42

nd SC/1

st

SRSCT Bus


implementation.

Dharmapuri 125 42

nd SC/1

st

SRSCT Bus


implementation.

Hiriyur 125 42

nd SC/1

st

SRSCT Bus


implementation.


Pugalur 125 42

nd SC/1

st

SRSCT Bus


implementation.

Pugalur HVDC 2 x 125 42

nd SC/1

st

SRSCT Bus


implementation.

APTRANSCO

Vemagiri 125

36th

SC

Bus December 2017 – LOA

issued on 18.06.2017

Kurnool 125 Bus December 2017 – LOA

issued on 18.06.2017

Kalpaka 125 Bus 2018-19. PO issued on

18.06.2016

Chittoor 125 39th

SC Bus 34th

TCC: By Dec 2019

Vijayawada 125 39th

SC 34th

TCC: By Dec 2019

Uravakonda 125 42nd

SC Bus 34th

TCC: By Dec 2019

Uravakonda 80 42nd

SCPSPSR

Jammalmadugu 80 34

th TCC: By Dec 2019

Noted in 42nd

SCPSPSR

Sattenapalli 125 34

th TCC: By Dec 2019

Noted in 42nd

SCPSPSR

Aspiri 2 x 125 Bus

Mylavaram

(Kadapa) 125 Bus

Talaricheruvu

(Ananthapuram) 125 Bus

Rachagunneri 125 42

nd SC/1

st

SRSCT Bus

34th

TCC: By Dec 2019


implementation.

Hindupur 80 to 125 42

nd SC/1

st

SRSCT Bus

34th

TCC: By Dec 2019


implementation.

APGENCO

VTPS Stage IV 125 39th

SC Bus 34

th TCC: PSDF approval

awaited

Polavram HEP 2 x 125 42nd

SC Bus 34

th TCC: Included in

EPC contract


KPTCL

Davanagere 125 39th

SC 34

th TCC: Estimate under

preparation. Talaguppa 125 39

th SC

C N Halli 2 x 125 42

nd SC/

1st SRSCT

Bus 1

st SRSCT: KPTCL

consent for the reactor

implementation.

34th

TCC: C N Halli –

Land to be identified.

Jagalur – Work under

progress.

Jagalur 2 x 125 42

nd SC/

1st SRSCT

Bus

KPCL

Yeramarus 125 42

nd SC/

1st SRSCT

Bus

Bellary 2 x 125 42

nd SC/

1st SRSCT

Bus

KSEBL Wayanad

125 42

nd SC/

1st SRSCT

Bus


implementation.

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 SS Kasargode, the same may not be required at

Wayanad.

KSEBL was suggested to take up the issue in SRSCT.

TANTRANSC

O

Almathy 125 39th

SC

Specification under

process Manali 125 39

th SC

Kayathar 125 39th

SC

Kamuthi 2 x 80 42nd

SCPSPSR

Virudhnagar

(765 kV)

2 x 330 42nd

SC Bus

2 x 330 42nd

SC Line

Coimbatore (765

kV) 2 x 240 42

nd 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:

agreed for

implement

ation.

Bus 1

st SRSCT: agreed for

implementation.

Rasipalayam 63 Bus 2018-19

Edayarpalayam 2 x 125 Bus

TSGENCO KTPP 125

1st SRSCT:

agreed for

implement

ation.

Bus

TANTRANSC

O/

TANGEDCO

Mettur 125 39th

SC

2018-19. To be diverted

from Palavadi and works

to be taken up.

TSTRANSCO

Asupaka 80 42nd

SCPSPSR

Suryapet 125 42

nd SC/1

st

SRSCT Bus

34th

TCC: Management

approval for 10 reactors

under process.


implementation.

TSTRANSCO may

implement reactors at

Tippapur, Kamalapuram,

Manikonda and

Yellampalli in first phase

Raidurg 125 42

nd SC/1

st

SRSCT Bus

Kamalapuram 125 42

nd SC/1

st

SRSCT Bus

Narsapur 125 42

nd SC/1

st

SRSCT Bus

Maheshwaram 125 42

nd SC/1

st

SRSCT Bus

Tippapur 125 42

nd SC/1

st

SRSCT Bus

Manikonda 125 42

nd SC/1

st

SRSCT Bus

Jangaon 125 42

nd SC/1

st

SRSCT Bus

Choutuppal 125 42

nd SC/1

st

SRSCT Bus

Yellampalli 125 42nd

SC/1st Bus


SRSCT

TSTRANSCO

2nd

Reactor at

Dindi in place

Srisailam LB

125

1st SRSCT Bus

NPCIL Kaiga 2 x 125

Bus

FS received for both

reactors. 1st reactor will be

retendered. Tendering for

2nd

reactor will be taken

up.

UPCL

Udupi 2 x 125

39th

SC

41st SCPSPSR: It was

informed that the

requirement was assessed

based on system studies,

therefore, it was decided

that the decision taken in

39th

SC Meeting may be

implemented.

In the OCCM, KPTCL had informed that Planning section had communicated

to PCKL in this regard and PCKL would take a call.

34th

TCC:

APL informed that engineering works are through and requested PCKL to

approve for UPCL to take further action.

It was noted that the technical/grid requirement has already been

established as it has been recommended in the Standing Committee.

KPTCL informed that Planning wing has concurred to the proposal and

after approval of Director it would be communicated to PCKL.

MD, PCKL stated that after the recommendation from KPTCL approval

would be communicated to UPCL.

NLC NLC TPS-II 2

nd

Expansion 125

42nd

SC Bus

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 Voltage

level Remarks

APTRANS

CO

Kadapa: 151.2 MVAR

Vijayawada: 144 MVAR

Visakhapatanam:165.6MVAR

On 33 kV

side 57.6 MVAR commissioned

21.6 MVAR commissioned


APSPDCL 640 MVAR

24 MVAR commissioned

APEPDCL 234 MVAR

210 MVAR commissioned.

KPTCL Bengaluru Tr. Zone: 671 MVAR

12.1 kV 121.8 MVAR

commissioned

Bagalkot Tr. Zone: 258.1

MVAR 12.1 kV 197.2 MVAR

commissioned

Hassan Tr. Zone: 153.7

MVAR 136.3 MVAR

commissioned

Mysore Tr. Zone: 60.9 MVAR 60.9 MVAR commissioned

Gulbarga Tr. Zone: 98.6 MVAR


Tumkur Tr. Zone: 278.4 MVAR 12.1 kV

159.5 MVAR

commissioned.

TSNPDCL 288 x 2 MVAR

110 x 1 MVAR

285 x 2 MVAR

110 x 1 MVAR

commissioned

TSSPDCL 223 x 2 MVAR

48 x 1 MVAR

145 x 2 MVAR

46 x 1 MVAR

commissioned

KSEBL 360 MVAR 66 kV Works will be taken up

after approval of the 11kV


Board and finalization of

support from PSDF.

TANGED

CO

34 x 2.4 MVAR ,11 KV

11 kV Work not yet completed.

Court case is filed by the

company (executing the

works) vide WP No.25515

of 2018.

16 x 2.4 MVAR , 22 KV

22 kV 16 x 2.4 /22 KV - 16 Nos

Commissioned

11 KV 2MVAR - 94 sets

11 kV IPDS - Tender opened on

29.08.18 and Price bid

opened on 12.10.2018 and

under negotiation

13 x 24 MVAR , 110 kV

110 kV PO placed on M/s Shreem

Electric Ltd and under

execution.

11 kV 2 MVAR - 78 sets

11 kV DDUGJY - Tender opened

on 06.09.18 and Price bid

opened on 12.10.2018 and

under negotiation

82 Sets of 11 KV, 2.4 MVAR

capacitor Bank in Coimbatore

region

11 kV Instead of 183 sets (82+101)

quantity revised as 68

(67+1) as per NLDC

remarks for Coimbatore and

Erode Regions respectively.

DPR submitted to PSDF,

Delhi,

11/22 kV 2.4 MVAR 101 sets -

Erode region

11/22 kV

11/22 kV 2.4 MVAR 32 sets -

Vellore region

11/22 kV Quantity revised as 30 sets

based on NLDC remarks.


Delhi.

75 sets of 2.4 MVAR 11/22 kV-

Trichy, Villupuram, TVL, MDU,

CNI(S)

11/22 kV Quantity revised as 49 sets

based on NLDC remarks.


Delhi.

Table –XII- ERS status

Transmission

Utility

Requirement as

per MoP

Existing Status/Remarks

APTRANSCO 3 2 ERS III would be taken up


through own funding.

34th

TCC: Under process

TSTRANSCO 1 Tender floated; would be taken

up for PSDF funding.

34th

TCC: Tender was floated, as

the tenderer had withdrawn,

retendering has to be taken up.

KPTCL 2 2

KSEBL 1 34th

TCC: Exorbitant rate was

quoted. Retendering would be

taken up. Agreed to take up

through own funds.

TANTRANSCO 2 34th

TCC: Tendering under

progress.

PED Nil Nil

PGCIL 4 (2 Nos.

Additional)

4 (SR I

& SR II

is having

2 no.

Each)

765 kV ERS (one each for SR-I

and SR-II)

34th

TCC: SR-I informed that

ERS is in transit and would be

placed at Nellore by end of Feb

2019. SR-II informed that the

ERS is not being considered for

the time being as all 765 kV lines

are charged at 400 kV in SR-II.

As and when lines are charged at

765 kV ERS would be

considered.

Table –XIII- Generating Units- Under Progress

Central Sector

Station Unit Installed

Capacity

MW

Scheduled date of

synchronizing /

commissioning

Remarks

NTPC

Kudgi TPS

Stage-I

III 800 Declared on COD

on 15.09.2018

Telangana STPP

Phase I

2 x 800 34th

TCC:

U-I CoD August

33rd

TCC:

MoP has allocated 85 % to


2020

(Synchronization by

Mar 2020)

U-2 CoD Nov 2020

(Synchronization by

May 2020)

Telangana and 15% retained

as unallocated subjected to

approval of competent

Authority.

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.

31st TCC:

NTPC had informed that the domestic coal was yet to be tied up. Within

two months, the status would be communicated.

CTU informed that there was no connectivity / LTA application pending

with them.

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.

NLC

New Thermal

Power Project

I 500 34th

TCC: Boiler

lighted up.

Synchronization by

Feb 2019 and COD

by March 2019.

II 500 34th

TCC: Light up

in April 2019 and

COD by June 2019.

CEA (Nov 2018)/PGCIL (Nov 2018): NNTPS – Ariyalur – July 2019

SR-II vide letter dated 10.09.2018 had requested NLCIL to expedite

the work and complete the bays at the earliest.

As LTA application for NNTPS is only for a quantum of 334 MW,

SRPC vide letter dated 14.09.2018 had requested SRLDC to kindly

intimate their views.

SRLDC vide letter dated 21.09.2018 had clarified that in Special

cases and based on request come from beneficiary, appropriate

adhoc action may be agreed among the associated agencies and

SRPC in the interest of the grid. SRLDC may agree to such

arrangements including scheduling of power by SRLDC which is in

line with existing practice/Clause relevance to CERC orders.


Special meeting on 23.10.2018 and a VC on 09.11.2018 were held

to deliberate on the issues w.r.t NNTPS (Minutes available on SRPC

website).

NLCIL informed that the charging of the LILO is expected by 3rd

week of December 2018. For reduction of Auxiliary Consumption

quantum from approved LTA quantum (334 MW) NLCIL had stated

that they would take up the issue appropriately.

SRPC vide letter dated 22.10.2018 had addressed to NLC and

NLDC regarding the LTA quantum. The reply of CTU dated

14.11.2018 in this regard is at Further, the issue of application of

losses was taken up with NLDC vide SRPC letter dated 16.11.2018).

In the 151st OCCM, TN had expressed concern that the reply of

NLDC on loss application on TN schedule was awaited.

In Petition No. 233/TT/2018 it was noted, ‘The Commission

desired to hear NLC before taking any decision with regard to the

COD of the instant assets under proviso (ii) of Regulation 4(3) of

the 2014 Tariff Regulations. Accordingly, the Commission directed

NLC to file its reply especially on the petitioner’s prayer for

approval of COD under the above said regulation.’

34th

TCC

NLCIL informed that the LILO of Neyveli-Puducherry at

NNTPP would be completed on 11.02.2019. The mines feeder

from TS-II had been shifted to NNTPP switchyard and the HTLS

line from new TANTRANSCO SS was to be connected to the

bays vacated. However, the strengthening of the bays / line

section at TS-II switchyard need to be carried out by

TANTRANSCO in view of the HTLS line.

TANTRANSCO agreed for strengthening of bays / line section at

TS-II switchyard for termination of HTLS line. TANTRANSCO

enquired about any evacuation constraints due to delay in

commissioning of 400 kV NNTPP – Ariyalur lines. The Ariyalur

SS of TANTRANSCO was expected by December 2019,

however, they would get in touch with OEM to expedite the 400

kV and downstream system.

It was pointed out that the 230 kV evacuation system was

essential, however, SRLDC had suggested the requirement of

SPS to control the loadings on Neyveli ICTs. The NNTPP-

Ariyalur line along with evacuation at Ariyalur SS was required.

CTU enquired about the readiness of 400 kV bays at NNTPP.

NLCIL informed that the bays would be ready by 11.02.2019.

CTU informed that 400 kV NNTPP – Ariyalur lines were

expected to be commissioned by June 2019.

NLDC was requested to revert back on the loss application for

the schedule on 230 kV side of TANTRANSCO. It was noted

that there were Hon’ble CERC Orders in similar cases and losses


may not be applicable for the schedules to TN on 230 kV side.

TPS –II 2nd

Expn 1&

2

2 x 660 34th

TCC: NLCIL

informed that the

project approval was

awaited and it would

take atleast 5 years

from LOA.

42nd

SCPSPSR:

Seeking connectivity for

1320 MW w.e.f. 01.04.2021

147th

OCC:

EAC had recommended for

environmental clearance. All

the SR constituents had

signed the PPA. Works

could be awarded in 3-4

months.

1st SRSCT: In place of

proposed 400 kV S/S at

Neyveli, it was agreed to

establish 400/230-110 kV

substation by upgradation of

the existing Cuddalore 230

/110 kV substation by

TANTRANSCO.

NPCIL

KKNPP 3 &

4

2 x 1000 34th

TCC

U3: 2023

U4: 2024

41st SCPSPSR:

CTU had informed that they

had not received any LTA

application from NPCIL for

Kudankulam - 3 & 4 units.

Any system strengthening

would be planned on receipt

of the LTA application based

on proper studies.

BHAVINI

Kalpakkam

(PFBR)

I 500 BHAVINI letter

dated 30.01.2019 :

End of 2020

33rd

TCC: March

2019


147th

OCCM: TANTRANSCO informed that Kanchipuram SS had been

commissioned on 07.09.2018.

Hon’ble CERC in its ROP (Date of hearing) in Petition No 99/TT/2018

Petitioner (PGCIL) had stated

He submitted that tariff for Asset-III: 230 kV DC Kalpakkam PFBR

Kanchipuram transmission line was not allowed by the Commission in

order dated 29.4.2015 and they have filed an appeal before Hon’ble

APTEL and APTEL has remitted the matter to the Commission for fresh

consideration.

BHAVINI vide letter dated 30.01.2019 have stated that SRPC may

allow BHAVINI to surrender the right for PFBR – Kalpakkam to

Kanchipuram line constructed by PGCIL for BHAVINI till January 2021

and grid may decide alternate usage of the line. BHAVINI would

approach SRPC to allocate both the Kanchipuram lines after completion

of various experiments for assessing the Fast Breeder Reactor

Performance.

TCC deliberations:

CTU informed that as per the prevailing regulations, the surrender is

not possible and they have already filed the petition in respect of

Kalpakkam-Kanchipuram lines before CERC. For the other two lines

Orders from APTEL and CERC have been received and BHAVINI

has been directed to pay the charges. BHAVINI has agreed to make

the payments after commissioning of the lines and already dues of

around Rs.111 crores were there. CTU requested that BHAVINI

need to pay the dues.

TANTRANSCO stated that the line has been tied at both the ends

and there was no question of surrender.

After deliberation, TCC recommended that there was no provision

for BHAVINI to surrender PFBR Kalpakkam-Kanchipuram line and

tariff is to be recovered as per existing regulations.

TANTRANSCO confirmed that their end switchyard is ready for

charging. PGCIL (SR-II) informed that BHAVINI had requested for

coordinating the protection settings which would be taken up.

Accordingly, SR-II and TANTRANSCO were suggested to charge

the line at the earliest.

UMPP

Krishnapatnam 3960

(6 x 660)

32nd

TCC: AP informed that after discussing with

the beneficiaries, an Expeditious Petition was

contemplated before Hon’ble Delhi High Court

(before approaching Hon’ble Supreme Court). The

petition was likely to be heard in the month of

March 2018.

Cheyyur 4000 New bids would be called

33

rd TCC:In line with GOI policy for using domestic coal in place of

iimported coal, the bidding documents are being revised and the bidding

process will be commenced by Ministry of Power.


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 March 2019:

State/UT Load

shedding in

MU

Max load

shedding in

MW

Bilateral

Purchases

import

(+)/export(-)

in MU

Comments

AP 0 0 1145/164

TS 0 0 1958/133 Agricultural supply is

extended to 24 hours in all

the districts from 1st January

2018.

KAR 0.00 0 371/129

KER 0.335 100 949/04

TN 0 0 3323/25

PED 0.913 80


Data to be submitted

Sl.

No

Data to be

furnished

By

whom

To

whom

Frequenc

y

Comments

1 OCC approval

requests for

Generation

Units Outages

Generat

ors

SRPC/S

RLDC

3rd

of

every

month

Planned Outages of CGS/ISG stations/MPPs approved

for the month of April/May 2019 are enclosed at

Annexure-I

2

ISTS/State

Sector

Transmission

Lines and

Elements

Outage

Proposals

Transm

ission

License

es/Gene

rators

SRPC/

SRLDC

3rd

of

every

month/Mi

d 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.xl

s).

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/SR

PC

3rd

of every

month

4 Comments/Re

asons for non-

availing the

shut down.

Transm

ission

License

es/Gene

rators

SRPC/

SRLDC

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

Constit

uents

SRPC

for

further

commu

nication

to

MoP/C

EA

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/

SRLDC

Monthly Refer Table XVI

8 Bilateral

Purchases

states SRPC/

SRLDC

Monthly

9 Installation/hea All SRPC/ Monthly Installation & ensuring healthiness of capacitor banks at

http://www.srpc.kar.nic.in/website/2017/operation/plout1147occ.xls

http://www.srpc.kar.nic.in/website/2017/operation/plout1147occ.xls



lthy capacitors Constit

uents

SRLDC distribution level should be ensured by all the

constituents.

10 MVAR

Interchange/M

VAR capability

testing

All

Generat

ors/SL

DCs

SRPC/

SRLDC

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/

SRLDC

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/

SRLDC

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

Constit

uents

SRPC/

SRLDC

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/

Entities

SRPC/

SRLDC

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

DISCO

MS

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:

[email protected]/[email protected]

16 Status of

implementation

of the

recommendatio

ns 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 31.03.2019 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/S

RPC

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/Reports

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 Prolonged

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/

Entities

SRPC/SRLDC 5th

of Every

month

Annexure - III

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