MINUTES OF THE 8TH MEETING OF TCC OF SRPC HELD AT KUMARAKOM … · to Kumarakom, Kerala also known...

SOUTHERN REGIONAL POWER COMMITTEE BANGALORE

MINUTES OF THE 8TH MEETING OF TCC OF SRPC

HELD AT KUMARAKOM ON 05.03.2009

1. INTRODUCTION

1.1 The 8th meeting of the Technical Coordination Committee of SRPC was held

at Kumarakom on 05th March 2009. The list of the participants is given at

Annexure-I.

1.2 AGM (Commercial), NTPC extended a hearty welcome to all the participants

to Kumarakom, Kerala also known as God’s Own Country. He thanked

SRPC for giving NTPC the opportunity to host the 8th TCC and 9th SRPC

Meetings.

1.3 Shri A.N. Dave, Regional Executive Director (South), NTPC welcomed the

honourable Members of TCC and participants to the picturesque

surroundings of Kumarakom. He added that this meeting assumed

significance as the peak months were staring at Southern Regional

Constituents. The shortages in SR were at par with the shortages in the rest

of the country. NTPC like all other generators would maximize its generation

during the peak months. Some of the maintenance overhauls of NTPC units

had been deferred in view of the high demand being faced by Southern

Region. He added that it was a privilege for NTPC to host the SRPC/TCC

Meetings. He also expressed hope that fruitful deliberations would take

place in these Meetings.

1.4 Shri Mohan Lal Batra, MS, SRPC welcomed the Members and participants to

the Meeting. He thanked NTPC for making excellent arrangements for

conduct of the Meeting. He also welcomed Shri T. Chatterjee, CE (GM),

CEA and Shri Major Singh, Director, CEA, to the meeting. He requested

Smt. S. Phebe Beryl, CE (Power Management), TNEB to preside over the

meeting in the absence of Member (Generation), TNEB, who is Chairperson,

TCC.

(8th meeting of TCC held on 05.03.2009 at Kumarakom)

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Agenda items were taken up for discussion.

2. CONFIRMATION OF THE MINUTES OF THE 7TH MEETING OF TCC

2.1 Minutes of the 7th meeting of the Technical Coordination Committee of SRPC

held at Hyderabad on 18th December 2008 were forwarded vide letter

No.SRPC/SE-II/TCC/2009/366-85 dated 16th January 2009.

2.2 The Minutes were confirmed.

3. TRANSMISSION SCHEMES 3.1 Transmission System for evacuation of power from Simhadri-II TPS (2x500 MW) of NTPC 3.1.1 The following transmission system was agreed for evacuation of power

from Simhadri-II TPS of NTPC in the 25th meeting of Standing Committee

on Power System Planning.

- Simhadri STPP-II TPS – Gazuwaka 400 KV D/C line

- Part capacity of APTRANSCO’s existing Vizag-Vemagiri-Narsaraopet 400 KV D/C line transmission corridor to be utilized through applying for long-term open access to APTRANSCO.

- It was also decided that when Vizag TPS generation was firmed up or any new generation came up in that area, APTRANSCO line could be spared and another line could be taken up as a Regional System Strengthening Scheme.

3.1.2 The Committee had noted that Simhadri Expansion was a 11th Plan

Regional project and NTPC had received power requirement from SR

constituents in excess of the installed capacity of 1000 MW and draft

PPA had been circulated. NTPC vide letter dated 08.03.2007 had

intimated details of requirement of power indicated by various

beneficiaries and vide letter dated 10th April 2007 intimated that the units

were tentatively expected to be commissioned during the financial year


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2010-11. It was also noted that formal allocation from the project was yet

to be issued by MOP. APTRANSCO had concurred to accord Open

Access for APTRANSCO’s transmission system for Simhadri STPS

Stage-II and agreed to make all the beneficiaries as Respondents, in the

proposed petition before APERC for fixation of tariff for use of

APTRANSCO asset.

3.1.3 In the 8th meeting of SRPC the Committee had noted the following:

- NTPC informed that a common Open Access application on behalf of the beneficiaries had already been submitted to APTRANSCO. The 1st Unit of the project was expected by November-December 2010.

- APTRANSCO had informed that they would process the Common Open Access application made by NTPC on behalf of all the beneficiaries and approach APERC at the earliest.

3.1.4 In the meeting, ED (GO), APTRANSCO informed that APTRANSCO

would approach APERC shortly since they were presently engaged in

finalization of Tariff Regulations. He added that later all the beneficiaries

would need to individually sign the agreement with APTRANSCO.

4. TRANSFER OF SIRSI-GUTTUR (DAVANAGERE) 400 kV D/C LINK OF KPTCL TO PGCIL AS A REGIONAL TRANSMISSION SCHEME

4.1 Technical Aspects

The Committee had noted that PGCIL & KPTCL had interaction in this regard

and for technical taking over, they were in readiness.

4.2 Financial Aspects

4.2.1 In the 8th meeting of SRPC held on 19th December 2008, KPTCL had

informed that during first week of December 2008, they had received the

auditor’s certificate and the same would be submitted to PGCIL. KPTCL

had also informed that by next month they would approach KERC for


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necessary approval. PGCIL would also approach CERC after the receipt

of the auditor’s certificate, pending KERC approval.

4.2.2 In the meeting, ED, SR-II, PGCIL informed that PGCIL had not received

the auditor’s certificate.

4.2.3 Director (Trans.), KPTCL said that they would furnish the auditor’s

certificate to PGCIL within a week’s time. KPTCL had already

approached KERC in the first week of January 2009.

4.2.4 CE (Trans), NPCIL expressed concern over slow progress on the issue.

4.2.5 MS, SRPC suggested KPTCL and PGCIL may coordinate to expedite the

issue.

5. NEW PROJECTS OF NLC & NTPC

A Statement giving details of power requirements indicated by various

constituents/finalized allocation percentages in new projects of NLC, NTPC

and Joint Venture are at Annexure-II.

5.1 500 MW (2 X 250) Lignite Based Neyveli-II Expansion

5.1.1 In the 8th SRPC meeting, Director (Power), NLC had informed the revised

schedule of commissioning of Unit-I & Unit-II as February 2010 & June

2010 respectively.

5.1.2 In the meeting, CGM, TS-II & II Expn., NLC said that NLC had discussed

the issue with BHEL and there would not be any further slip in TS-II Expn.

Project. He confirmed the dates of commissioning of Unit-I & II as

February 2010 and June 2010.

5.2 2000 MW (4x500) coal based power plant at Orissa (Ib Valley)

5.2.1 The status of progress in respect of the project is as under:


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- Alternate land had been identified at Rengali Village, Jharsuguda District. Finalization of land acquisition formalities pending with Orissa Government.

- SRP Committee had passed a resolution seeking full share to SR constituents from the project as they were the first to give a firm commitment for power take off from the project.

- Chairperson, SRPC had taken up with the Secretary (Power), MOP for allocation of entire power from the 2000 MW Ib Valley Project to the constituents of Southern Region as they were the first to provide a firm commitment for off-take of power from the project.

- NLC had requested Industrial Promotion Investment Corporation of Orissa Limited (IPICOL) to reserve 1135 hectares of land in the new site and an application in the prescribed format along with the fees had been sent to IPICOL for reserving the land.

- NLC had informed that project was expected to come up in 12th Plan.

- Reply from Orissa Government was awaited by NLC.

- General Manager, Project and Business Development, NLC vide letter dated 6th October, 2008 had stated that Orissa State had released policy guidelines for establishment of Thermal Stations in the State and NLC was perusing the policy papers.

5.2.2 In the 8th meeting of SRPC, NLC had informed that the issues raised by

Orissa Government, like signing of new MOU and 5% share of the profit

were under consideration of its management.

5.2.3 In the meeting, CGM, TS-II & II Expn., NLC informed that the policy

guidelines issued by the Orissa Government including signing of new

MoU and 5% share of profit was under circulation with the Board of

Directors. A view would have to be taken in the matter by NLC.

5.3 Alternative site at Narsapur

- NLC had identified a site at Andhra Pradesh (Narsapur) but the viability of coal transport and logistics were yet to be finalized by them.


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- Director (Power), NLC, in the 7th meeting of SRPC had informed that certain issues like rail linkage to Narsapur, Godavari River Crossing, coal transportation for more than 1000 Km etc. were to be addressed.

- CMD, APTRANSCO had nominated SE (Civil), APTRANSCO, Vishakhapatnam as a Liaison Officer on behalf of APTRANSCO and requested NLC to interact with him, for resolution of the problems.

5.3.1 In the 8th meeting of SRPC the Committee had noted the following:

- Director (Power), NLC had informed that the issue regarding transfer of coal over a distance of 950 Km. was being discussed with Railway Authorities.

- Chairperson, SRPC & Chairman, TNEB suggested that possibility of having Railway as a partner in the project may also be explored since Railways had expressed interest in becoming partners. He had also said that NLC may furnish their milestones to M/s.BHEL for both the projects. A meeting with BHEL, NLC etc. could be organized to sort out the issues at the earliest, in which, the good offices of Hon’ble Union Minister of State for Power could also be sought for early resolution of issues.

5.3.2 In the meeting, CGM, TS-II & II Expn., NLC informed that the Narsapur

project could be taken up if the Ib Valley Project did not materialize. NLC

officials along with designated officer of APTRANSCO inspected the site

and had discussion with Railway authorities. Subsequently, SE,

APTRANSCO had collected the details regarding distance and railway

track availability and communicated the same. The issue regarding

willingness to transport is to be further discussed with Railway officials.

Moreover, decision regarding making Railways as partners was yet to be

taken by NLC.

6. LEVY OF SERVICE TAX ON ELECTRICITY TRANSMISSION AND SLDC CHARGES

6.1 The issue regarding levy of service tax on Electricity Transmission and SLDC

charges was discussed in the 2nd SRPC Meeting held on 31st October 2006


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at Hyderabad. CMD, APTRANSCO, at that time, had informed that

APTRANSCO and some other transmission utilities had received notice for

service tax for transmission of electricity. She had added that even

distribution companies could receive notice in this regard. In case service

tax for transmission of electricity are to be paid by Transmission and

Distribution companies the charges may need to be added in the tariff.

APTRANSCO’s tax consultant had opined that electricity could be defined as

‘goods’ and provision of service tax may not apply on transmission of

electricity and hence it may be exempted from service tax. It was agreed

that Chairperson, SRPC would take up the matter with Secretary, Ministry of

Power, Government of India for further taking up with Ministry of Finance.

Chairperson, SRPC vide letters dated 9th November 2006, 11th December

2007 & 19th February 2008 and 30th October 2008 had taken up the matter

with Secretary (Power), Government of India.

6.2 In the 8th meeting of SRPC held on 19th December 2008 the Committee had

noted the following:

- There was an Order of Hon’ble Supreme Court in regard to AP duty issue pertaining to sale of power from RSTPS, wherein the provisions of treatment of electricity had been dealt with. APTRANSCO would seek legal opinion of their tax consultant based on the Supreme Court order and this opinion would be forwarded to the other constituents.

- CMD, APTRANSCO stated that their Tax Consultant had already opined that electricity may be treated as ‘goods’. The Irrigation Department in Andhra Pradesh had also been asked to pay Service Tax. In view of the above, the issue could be taken up with Secretary (Revenue), Government of India. The issue may also need to be taken up with Director General (Service Tax), GoI, Mumbai for clarification.

- MD, KPTCL said that they would revert back on whether KPTCL had taken up the issue with Appellate Tribunal regarding Service Tax.


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- After deliberation, it was decided that Chairperson, SRPC would take up the issue with Director General (Service Tax), GoI, Mumbai and subsequently with the Secretary (Revenue), GoI.

6.3 Chairperson, SRPC had taken up the matter with Director General (Service

Tax), GoI, Mumbai vide letter dated 4.2.2009 (copy at Annexure- III). MOP

had also sought the views of CEA regarding exemption of service tax on

electricity transmission and SLDC charges. CEA had furnished its views to

MOP vide letter dated 28.01.2009 (Annexure- IV).

6.4 In the meeting, MS, SRPC informed that DG (Service Tax), Mumbai had

forwarded the letter to the Chief Commissioner (Central Excise), Chennai

Zone (copy enclosed as Annexure-V) for further examination. He pointed out

that CEA had furnished its opinion to MoP, which was favourable to the

utilities.

6.5 Director (Trans.), KPTCL informed that KPTCL had taken up the issue

regarding Service Tax with the Appellate Tribunal and details in this regard

would be communicated.

7. OPERATION OF TALCHER-KOLAR HVDC TRANSMISSION SYSTEM IN GROUND RETURN MODE

7.1 In the 8th SRPC Meeting, the Committee had noted the following:

- The power transfer needed to be restricted to 150 MW in GRM, as recommended by KPTCL’s Consultants in the interest of the nearby KPTCL transformers which were getting affected.

- As per PGCIL technical inputs, power transfer could be upto 450 MW in GRM.

7.2 In the CERC (Terms and Conditions of Tariff) Regulations, 2009 for

generation and transmission projects for the period 2009 -14, Appendix-IV of

the same details the procedure for calculation of Transmission System

Availability Factor for a month.


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7.3 Transmission capability reduction of the system in MW (TCR) during GRM

operation of Talcher – Kolar HVDC transmission system needed to be

finalized.

7.4 In the meeting, Director (Trans.), KPTCL said that flow upto 150 MW in GRM

only was acceptable to KPTCL as the assets of KPTCL could get affected

with higher flows. The limit of 150 MW in GRM had been finalized after

detailed studies carried out by KPTCL’s Consultant. He added that humming

sound was heard in transformers as far as in Davanagere and KPTCL could

not take a chance of power transformer failure.

7.5 ED, SR-II, PGCIL said that studies of PGCIL had concluded that 450 MW

flow in GRM, was possible.

7.6 CE (GM), CEA said that it was seen that there were two established results.

GRM operation was not very frequent and occurring once in a while only. To

sort out the issue, CEA could therefore be approached in the matter and

requested to give a decision in the matter as early as possible.

7.7 ED, SR-II, PGCIL said that PGCIL was only part of the measurement

process during tests carried out by M/s. PRDC (KPTCL’s Consultant).

PGCIL was however not a party to the recommendations given by M/s.

PRDC. There was no doubt about the measurement, but it was a larger

question of interpretation.

7.8 SE (O), SRPC pointed out that Clause 4.2 (b) of IEGC states

“Any new or modified connections, when established, shall

neither suffer unacceptable effects due to its connections to

ISTS nor impose unacceptable effects on the system of any

other connected agency.”


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In the previous meeting it was noted that the flow of DC current in neutrals

would damp down with the growth of transmission system.

7.9 ED, PGCIL said that as per PGCIL’s technical input 450 MW flow in GRM

was safe. Flow restriction of 150 MW in GRM was however a scheduling

aspect in real time operation. He added that the matter could be referred to

CEA separately.

7.10 Technical Director, KPCL said that this was a technical problem. The

transformers were getting stressed and humming sound was being observed

when flow in GRM was more than 450 MW. The transformer manufacturer

may also have to be consulted also to give a technical solution to the

problem.

7.11 After deliberations, it was agreed that the Transmission

Capability Reduction of the Talcher - Kolar HVDC transmission system

during GRM operation would be 2350 MW (2500 MW-150 MW) till CEA

recommends a technically acceptable value. CEA would be requested to

examine and suggest a technically acceptable value within a period of three

months. KTPCL & PGCIL would forward their reports and associated

documents to CEA/SRPC Secretariat. The availability of Talcher - Kolar

HVDC would be modified, if required, based on the recommended value of

CEA, with effect from April 2009.

8. PROGRESS OF BUS/LINE REACTORS TO BE COMMISSIONED IN SR 8.1 Bus/Line reactors are to be commissioned by the SR constituents as

identified in the 22nd Standing Committee on Power System Planning of

Southern Region, and approved in the 4th SRPC meeting held on 7.6.2007.

8.2 It was noted that these reactors were not coming up in the desired time

schedule. The issue is being regularly followed up in the OCC meetings. In


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the 26th meeting of the Standing Committee on Power System Planning held

on 13.06.2008, Member (PS), CEA had observed that the progress on

implementation of reactors at 400 kV S/S in SR was rather slow. All efforts

needed to be made to expedite the work as the whole scheme was to be

completed by the end of 2008-09 itself.

8.3 It was decided that each agency would provide detailed status of

implementation of reactors in their state/area of jurisdiction. In the 8th SRPC

Meeting, the representatives of KPTCL informed that they were converting

the line reactor at Guttur (Davangere) for using the same as Bus reactor.

Member (PS) pointed out that the requirement of reactors at Raichur,

Talaguppa, Davangere, Nelamangala and Hoody was in addition to the

existing line reactors in operation. Therefore, KPTCL should install new/

additional reactors in operation.

8.4 CGM, TPS-II, NLC vide letter dated 01.12.2008 addressed to ED, SR-II,

PGCIL (copy enclosed at Annexure-VI) had raised certain issues regarding

the installation of bus reactors at NLC.

8.5 Executive Director (OS). PGCIL vide letter dated 19.02.2009 (Annexure-VII)

had informed that POWERGRID was making special efforts to expedite the

commissioning of 7 Bus Reactors and 4 Line Reactors under its scope

before the schedule of November 2010. Beneficiaries had been requested

to concur for preponement of commercial operation of these reactors so that

they could be declared under commercial operation separately as and when

each reactor was commissioned.

8.6 The updated information furnished by the constituents during the 8th TCC

meeting is given in the Table below:


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Bus Reactors

Sl. No. Bus Name Status POWERGRID 1 Hosur

2 Kolar

3 Hiriyur

4 Salem

5 Munirabad

6 Hyderabad (PG)

7 Sriperumbudur

By March 2010

NTPC 8 Ramagundam

9 Simhadri

Before November 2010. Tender activity started

NPCIL 10 Kaiga Before November 2010 (entrusted to

PGCIL). Tree cutting and leveling works were started and site would be handed over to PGCIL.

NLC 11 Neyveli-Expn.

12 Neyveli TS-II

Before November 2010. To start tender activity.

KPTCL 13 Raichur TPS Would be completed by KPCL before

2010. 14 Talaguppa

15 Davanagere

16 Nelamangala

17 Hoody

Before 2010

APTRANSCO 18 Srisailam LBPH APGENCO has informed about space

constraint at Srisailam. Taken up in SCPSPSR.

19 Kurnool

20 Vizag

By March 2010.


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Line Reactors

Sl.No. Name Status

POWERGRID 1 Trichy 2 Madurai 3 Udumalpet 4 Thiruvananthapuram

By March 2010

APTRANSCO 5 Hyderabad By March 2010

8.7 AGM, SRLDC informed that with the commissioning of bus reactors at

Tirunelveli as approved in previous SRPC meeting, the voltage profile at

Tirunelveli had improved significantly. The voltage was not going beyond 410

kV at night hours even with all the lines in service. He requested the

constituents to expedite the commissioning of the other reactors also. He

added that since there was some space constraint to install a reactor at

Srisailam Left Bank, therefore the machines at Srisailam Left Bank could run

in synchronous condenser mode whenever needed since the units had the

necessary capability. He also enquired from KPTCL whether the

commissioning of the bus reactor at Guttur could be preponed since the 400

kV lines had to be opened in that area on a daily basis. During rainy season

upto 40 numbers, 400 kV lines had been opened, to contain the over voltage.

8.8 CE (Trans.), NPCIL enquired whether the 220 kV side voltages had

improved or not as earlier the Kudunkulam transformers were tripping due to

over fluxing as informed in the previous SRPC meeting. He also informed

that PGCIL had set up their office at Kaiga GS and the team had been

mobilised. Tree cutting was on and the site was expected to be handed over

to PGCIL by 15th March 2009 for installation of reactor.

8.9 Director (Trans.), KPTCL said that reactor at Davanagere would be

commissioned within one year i.e, before March 2010.


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8.10 ED, SR-II, PGCIL said that the position had now been reviewed and reactors

to be commissioned by PGCIL were likely to be commissioned before March

2010. He therefore requested the constituents to agree for commercial

operation of the reactors as and when they are connected to the grid, since

the SR Grid was facing high voltage problems. Earlier the utilities had

already requested for commissioning of the reactors as early as possible in

the interest of System Operation.

8.11 ED (GO), APTRANSCO said that as regards running the Srisailam units in

synchronous condenser mode, they would revert back in 10 days time.

8.12 TCC recommended for commercial operation of PGCIL reactors as and

when they were commissioned.

9. EVACUATION SCHEMES FOR NEW CENTRAL GENERATING STATIONS

9.1 The situation of anticipated availability from the three Central Generating

Stations coming up in the 11th Plan was as under:

a) Kudankulam APP

Unit-I : December, 2009 Unit-II : March, 2010

b) Neyveli-II Expansion

Unit-I : February, 2010 Unit-II : June, 2010

c) Kaiga

Unit-IV : May go beyond 2008-09

9.2 In anticipation of the generation availability in the periods as mentioned

above, SRPC Secretariat had been following up with the constituent States

to match their corresponding evacuation transmission system availability in

appropriate time frame to ensure no bottling up of power at the CTU junction

points of the State.


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9.3 The updated information on progress on evacuation schemes is given at

Annexure-VIII.

9.4 In the 8th meeting of SRPC the Committee had noted the following:

- NPCIL had requested the constituents to furnish the requirement of power from Kudankulam II Stage (4000 MW) which was proposed to be commissioned during 2015-2020.

- Regarding 400 kV Mysore-Kozhikode, PGCIL had informed that the Hon’ble Energy Minister, Government of Karnataka had taken a meeting in this regard with Forest Department and District Collector of Coorg District. Forest Department was taking up the issue with GOI and the District Collector was pursuing the matter in regard to the ROW issue.

- ED (SR-II), PGCIL had said that though there were some positive developments, the situation with regard to ROW of 400 kV Mysore-Kozhikode line would be clear by the next SRPC meeting. In respect of the lines in Kerala, he said that PGCIL was getting full support from the State Government & also from KSEB.

- NPCIL had expressed concern over the tripping of transformer being used to avail start up power at Kudankulam as a result of overfluxing. TNEB had assured necessary assistance to address the issue.

9.5 GM (I/c), SRTS-I, Power Grid vide letter dated 9.2.2009 (Annexure-IX) had

requested APTRANSCO to inform about the status of associated 220 kV

system of Andhra Pradesh, with respect to the commissioning of 400 kV S/S

at Warangal. In the 7th SRPC Meeting, the preponement of commissioning

of Warangal S/S had been approved. ED (OS), PGCIL vide letter dated

19.02.2009 (refer Annexure-VII) had also requested confirmation from

SRPC, about the completion of the project, admitting the commercial

operation of the system and payment of full fixed charges on regional pool

basis.

9.6 ED (OS), PGCIL vide letter dated 19.02.2009 (refer Annexure-VII) had stated

that in the 7th SRPC Meeting, the advancement of Hassan and Karaikudi


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substation along with LILOs had been approved from August 2009 to

February 2009. This was with the understanding that with regard to Hassan

assets, it was tentative and subject to review. KPTCL was requested to

please indicate their readiness so that Hassan related assets could be

commissioned.

9.7 In the meeting, CE (Trans.), NPCIL informed that on account of fuel

constraints Unit-4 of Kaiga would be commissioned in the first quarter of

2010. NPCIL would furnish details regarding proposed Kudunkulam Stage-

II, 4000 MW Project to the utilities.

9.8 ED, SR-II, PGCIL said that regarding forest clearance in Karnataka in

respect of 400 kV Mysore- Kozhikode line, Chief Minister of Karnataka had

cleared the file and they would pursue the issue with MoEF. Regarding

coffee plantation, a meeting with DC, Kodagu, local people and PGCIL had

been held. Another meeting would be held with the local people, within two

weeks, after which PGCIL may be able to take up preliminary survey works.

On Kerala side, things were easing out and the issue of compensation was

likely to be resolved.

9.9 APTRANSCO informed that their system would be ready by July 2009 and

Warangal 400 kV S/S could be commissioned accordingly. TNEB informed

that their system was ready and Karaikudi 400 kV S/S along with LILO could

be commissioned accordingly. KPTCL informed that since their system

would be ready by June 2009, Hassan 400 kV S/S along with LILO could be

commissioned accordingly. TCC recommended for approval of the above

elements and sharing of the transmission charges.

9.10 ED, SR-II, PGCIL requested for commissioning of the following transmission

elements of Neyveli TS-II Expansion Evacuation Scheme:


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• Neyveli TS-II Expansion-Neyveli TS-II (2xS/C)

• Neyveli TS-II Expansion-Pugalur D/C

• Pugalur-Madurai D/C

• 400/220 kV, 2x315 MVA S/S at Pugalur

On a request from the constituents for further details, PGCIL agreed to

present the issue to SRPC the next day with relevant study details and

necessity for early commissioning.

9.11 ED, SR-II, PGCIL also requested for commissioning of the third 400 kV

transformer at Thiruvananthapuram.

9.12 KSEB agreed for the above.

9.13 Technical Director, KPCL said that Unit-8 at RTPS and Unit-2 at BTPS were

expected to be commissioned by November 2009 and 2010 respectively

and requested that transmission evacuation system for these units should

be tied up. Gundia (200 MW) project was also likely to come up in 2010-11.

TCC suggested that the issue may be taken up by KPCL with KPTCL and

Standing Committee on PSPSR.

10. GENERATION & COAL STOCK POSITION AT THERMAL STATIONS OF SOUTHERN REGION

10.1 The need for maintaining statutory coal stock position in all the thermal

stations at all times has been deliberated in various forums of SRPC. OCC

has been reviewing the coal stock position at the stations on a monthly basis.

10.2 Generating Companies were requested to apprise the Committee of the

present coal stock position and also the steps taken by them to enhance the

coal stock to levels as per statutory requirements.

10.3 In the meeting, TCC was apprised of the coal stock position in thermal

stations as downloaded from CEA website as on 1st March 2009.


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10.4 CE, APGENCO said that the coal stock at Dr. N. Tata Rao (Vijayawada)

Station and Rayalaseema was for 7 days & 2 days respectively. Singraneni

had promised continuous supply of 12 rakes/day and APGENCO stations

were hence comfortable with respect to coal stock.

10.5 MS, SRPC suggested that any coal supply related issues could also be taken

up with CEA, enabling it to be discussed in the weekly Sub-Committee

meeting in the Ministry of Coal.

10.6 CE (GM), CEA pointed out that it was surprising that Kothagudem station had

reported loss of generation recently, though it had a coal stock of 8 days. He

requested APGENCO to look into this issue.

10.7 CE, APGENCO said that the coal meant for Kothagudem had been diverted

from Singraneni to VTPS & Rayalaseema and the coal was also of poor

quality (45% ash content).

10.8 Technical Director, KPCL said that the coal stock at Raichur and Bellary

Thermal Station was for 24 days (4,76,000T) & 30 days respectively. He

expressed concern over the limited rakes in the railways for the supply of

LSHS to Yelahanka DG Plant. Though 6 rakes were required per month, 2

rakes were being received and with a great difficulty 4 rakes were now being

received. He said that Yelahanka DG plant was important since it catered to

the load centre at Bangalore.

10.9 CE (GM), CEA suggested that KPCL may forward information to CEA for

further needful, though the matter pertained to LSHS supply and not coal.

10.10 Technical Director, KPCL said that the CHP problem had been resolved in

500 MW Bellary unit and the commissioning process of the unit was on (72

hrs. continuous run). He added that Raichur units had achieved PLF of

93.93% in January 2009 and 99.84% in February 2009.


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10.11 Regional Executive Director (South), NTPC informed that though stock at

Talcher Stg-II was for three days it was a pit head station. Talcher had

maintained PLF of 102% for last about two months. NTPC was in touch with

MCL authorities on a daily basis. The generation at Talcher Stg.-II was not

suffering but it would take some time to build up the coal stock. He also

assured that whenever wharf wall were taken up, availability to SR

constituent would not be affected. He informed that NTPC had postponed

the maintenance of some of its units to next financial year, in deference to

the requests received from the states in this regard.

10.12 SE (O), SRPC pointed out that earlier coal stock at Talcher had reached

critical levels and the Talcher units had run on oil support also.

10.13 Generation levels at NLC Stations

10.13.1 In the 8th SRPC Meeting, NLC had informed that land acquisition problem

still persisted and the site owners were refusing to hand over physical

possession of the land. District Collector, Cuddalore had assured actual

handing over of land by 31st December 2008. In case the land was

handed over by December 2008, NLC would be in a position to mine

lignite by April 2009. In case the land was not handed over, NLC would

have to plan for contingency mining which necessitated lot of changes &

efforts compared to the present mining practice. On a query from MD,

KPTCL, NLC had clarified that 2000 MW generation would be maintained

upto June 2009. Chairperson, SRPC assured that TNEB & GoTN would

make all efforts to ensure that the land was handed over to NLC at the

earliest. He had also suggested that NLC be in operational readiness to

implement the contingency plan, if required.

10.13.2 In the 31st meeting of OCC held on 7.1.2009, NLC representative had

informed that Shri A.R. Ansari had assumed charge as CMD, NLC

recently. CMD had assured full generation from NLC stations before


20

Pongal. A Piece of land was being excavated to enhance their mining

activities.

10.13.3 NLC had been requested to apprise the Committee about the progress on

land acquisition and about the availability that NLC would maintain in its

stations in the coming months. At present, the generation in NLC stations

has relatively improved.

10.13.4 In the meeting, CGM, TS-II & II Expansion informed that NLC had met

gross generation of 3254 MU against the target of 2887 MU for the

months of January & February 2009. It had achieved average generation

of 2298 MW against the target of 2039 MW during the same period. He

assured that NLC would maintain about 2000 MW till June end as

assured in the earlier meetings. He said that NLC was getting necessary

assistance from the Govt. of TN and TNEB to resolve land acquisition

problems. NLC had been able to get some land which had facilitated the

generation.

10.14 Generation level at NPCIL Units

10.14.1 In the 8th SRPC meeting NPCIL had informed that there were signs of

improvement on the fuel supply front and even the indigenous fuel

supplies were being augmented. Member (Generation), TNEB vide letter

dated 29.1.2009 (Annexure-X) had expressed concern over the low

level of generation in Atomic Power Stations, and requested for

necessary advance action to ensure maximum generation at Atomic

Power Stations.

10.14.2 NPCIL had been requested to apprise the Committee of the generation

levels that would be maintained at NPCIL units in Southern Region in the

coming months.


21

10.14.3 In the meeting, CE (Trans.), NPCIL informed that at present two units at

MAPS and two units at Kaiga GS were on bars. The third unit at Kaiga

GS was expected to be back on bars by month end. NPCIL was

constrained to run the units at 50-60% PLF due to fuel mismatch. He

also expressed concern over the protection system in the Karnataka grid.

On one occasion, recently the fault in Karnataka system was cleared

after 4-5 seconds (by PGCIL system) and consequently Kaiga units had

tripped on unbalance. The generation in the Kali complex also got

affected due to delayed clearance of faults in Karnataka system. The

fault had not been cleared for 4-5 seconds which was a serious issue.

10.14.4 Director (Trans.), KPTCL said that due to heavy fog in the Hubli area

insulator decapping had taken place. KPTCL was monitoring the system

and was taking all steps like insulator replacement to keep the system

secure.

10.14.5 AGM, SRLDC said that in the OCC meeting it had been noted that higher

generation was maintained at Nagjhari, though a number of lines in Kali

complex were out. He suggested that the Kali complex generation be

scheduled by KPTCL, SLDC appropriately based on the availability of net

work. Full analysis report on the grid disturbances in Nagjhari area had

not yet been furnished by KPTCL for the recent incidents.

10.14.6 MS, SRPC suggested that the issue could be deliberated in detail in the

Protection Sub-Committee.

11. USING 220 kV CHIKKODI-KOLHAPUR LINE FOR TRANSFER OF POWER

11.1 SRLDC had proposed a methodology to take care of STOA transactions/UI

power between NEW Grid and SR Grid by using 220 kV Kolhapur-Chikkodi

circuit.


22

11.2 As decided in the 7th SRPC meeting, the issue was discussed in the 7th

Commercial Sub-Committee meeting held on 22nd July 2008.The following

were the views of the Constituents:

- CM (Commercial), SRTS-II, PGCIL said that since the link was inter-regional and not intra state, usage of this link factoring in added costs of Karnataka & Maharashtra needs to be relooked, as it involved commercial implications.

- EE, KSEB said that if the transaction was for a particular utility, the utility should bear all the cost and if it was used for UI power transfer, it should be shared by the constituents. He added that regulations would not allow split up of UI on inter regional links, as such Karnataka could absorb the UI.

- EE, TNEB said that in principle they agreed for STOA. He requested KPTCL to take up with KERC for waving off transmission charges and losses for using the link. Differential UI may be borne by all the constituents.

- DGM (Commercial), SRLDC said that losses to the State system were allowed by CERC, but no charges were applicable for Maharashtra and Karnataka systems.

- APPCC intimated that they would avail the power through the line from spare capacity of about 25MW to 30MW by paying the STOA charges on day ahead basis but not on certain period i.e., two months to three months because huge financial commitment involved under STOA charges.

11.3 Subsequently, GM, SRLDC vide letter dated 3rd October 2008 had stated

that UI exchange was opportunistic in nature and had to be carried out at

very short notice. GM, SRLDC had also requested KPTCL to cooperate and

radialise Chikkodi feeders on to Maharashtra at short notice.

11.4 In the 8th meeting of SRPC, the Committee had noted the following:

- KPTCL had informed that there were some IPPs located in Chikkodi area and there could be some loss of generation etc. whenever the island had to be shifted to NEW grid and vice versa. This could lead to disputes etc. at a later date. KPTCL


23

had always maintained that radicalization should be for at least 15 days, and there could not be frequent changeover since some IPPs in Chikkodi area were injecting power to the grid on STOA. They would conduct a study on the issues involved and revert back.

- SRLDC had pointed out that the lost opportunities of availing UI in previous months due to saturation of available present inter-Regional capacity and non availability of 220 kV Chikkodi-Kolhapur link.

11.5 AGM, SRLDC vide letter dated 17.02.2009 (Annexure-XI) had again

requested KPTCL to look into the matter for radialising Chikkodi load on to

Maharashtra on short notice whenever opportunity arose to achieve

economy.

11.6 In the meeting, CE (LD), KPTCL said that KPTCL, in principle, had agreed to

the proposal if the commercial interest of KPTCL were taken care of. He

said that the Chikkodi - Kolhapur line should be radialised at least for

minimum 15 days.

11.7 AGM, SRLDC said that the power drawn would be regional UI and

requested Karnataka to convey their willingness so that power could be

availed as UI whenever the opportunity arose.

11.8 Director (Trans,), KPTCL said that there were number of NCE projects in

that area and frequent changeovers could not be considered.

12. RIGHT OF WAY OF KUDANKULAM ATS

12.1 ED (OS), PGCIL vide letter dated 5th December 2008 had mentioned that

TNEB and KSEB had sought compensation for surrendering 220kV Edamon-

Kodikuruchi line and 220kV Iddukki-Madakkathara lines. It had also been

mentioned that the compensation amount would be paid by PGCIL and

expenditure booked to the project cost.


24

12.2 In the 8th meeting of SRPC, Member (PS), CEA had informed that the

compensation issue had already been envisaged during the planning stage.

PGCIL should be allowed to go ahead with the scheme, to avoid further time

& cost over-run.

12.3 CMD, APTRANSCO had said that AP would get the issue examined at its

end.

12.4 In the meeting, ED, SR-II, PGCIL clarified that the amount payable to TN and

Kerala was towards value of assets appearing in their books and not as

compensation.

12.5 ED (GO), APTRANSCO said that the relevant details could be furnished to

them. PGCIL agreed to furnish the correspondence received from TN &

Kerala in this regard.

13. ULDC AUGMENTATION

13.1 In the 8th SRPC meeting the status of ULDC augmentation was discussed.

APTRANSCO had pointed out that the scheme may need to be reviewed in

the context of the changed scenario in which 2300-2400 MHz frequency

band had to be surrendered for broad band wireless access. TCC had

however noted that the augmentation scheme had already been approved by

SRPC after detailed deliberations. On further deliberations, it was suggested

that the Constituents would communicate concurrence/approval by

respective Head of Organization to PGCIL, by the month end (December

2008).

13.2 MS, SRPC had taken up the issue with the utilities vide letter dated

13.1.2009. Communication dated 22.01.2009 received from TNEB in this

regard is at Annexure-XII.


25


that the validity of the offer of the agency (revalidated several times) had

lapsed. Hence, POWERGRID had no other option but to abandon the

project. This was for the information of SRPC.

13.4 In the meeting, ED, SR-II, PGCIL said that the validity of contract had lapsed

and hence PGCIL had no other option but to abandon the project.

13.5 MS, SRPC suggested that the scope of ULDC augmentation works could be

planned to be covered in the scope of the works being planned in lieu of

surrender of 2300-2400 MHz frequency band.

14. REFRAMING OF 2300 – 2400 MHz FREQUENCY BAND FOR BROADBAND WIRELESS ACCESS (BWA)

14.1 PGCIL had informed about the Summary Record of the meeting taken by

Wireless Planning Commission (WPC) on 11.08.2008 in Sanchar Bhavan,

New Delhi to discuss reframing of 2.3-2.5 GHz band in accordance with the

mandate given by GoI. The users of this band had attended the meeting

including POWERGRID. WPC intends to use this band for Broadband

Wireless Access based on the recommendations of Wireless Advisor to GOI.

The users were requested to surrender the band within a certain time frame.

14.2 In the Southern Region there are 35 Nos. Micro wave links commissioned

under ULDC scheme and the same frequency spectrum is being used in all

of these links. The constituent wise break up of the links is as follows:

Sl.No. Constituent Links

1 Central Sector 2

2 APTRANSCO 7 3 KSEB 7 4 PED 3 5 TNEB 16

Total 35


26

14.3 PGCIL had informed that the issue was discussed in the ULDC Coordination

Meeting held on 22.09.2008. The beneficiaries had agreed for OFC links

subject to the condition that they were compensated for surrender of the

frequencies. Beneficiaries had been requested to intimate about

development of OFC links in their state and concur for sharing charges of

OFC link in Central Sector. It had also been stated that POWERGRID could

take up these works similar to ULDC project.

14.4 In the 8th SRPC meeting, the Committee had noted that TCC had agreed in

principle about the necessity of the work. The cost implications as furnished

by PGCIL are at Annexure-XIII. APTRANSCO had pointed out that its

Communication Wing would like to carry out AP portion of work while they

would share the CGS portion. PGCIL had opined that it would be desirable if

a single agency took over the entire work. It was also agreed that the

constituents would communicate concurrence/approval by respective Head

of the Organizations to PGCIL by December 2008 end.

14.5 MS, SRPC had taken up the issue with the constituents vide letter dated

13.1.2009. TNEB letter dated 06.02.2009 in this regard is enclosed as

Annexure-XIV.


that considering the fact that frequency bands have to be handed over within

two years from November 2008, beneficiaries may please intimate urgently

concurrence for works to be taken up by POWERGRID or alternatively

indicate their plan to ensure data flow to SRLDC. Since lead time was

involved in identifying the agency for execution and imports are involved, the

matter was critical.

14.7 In the meeting, ED, PGCIL informed that in other regions, PGCIL had been

entrusted to carry out the work. He suggested that it would be better if one

agency carried out the work.


27

14.8 ED (GO), APTRANSCO said that the estimates furnished by PGCIL were at

large variance with the estimates framed by APTRANSCO’s communication

wing. The reasons for the large variation should be studied.

14.9 CE (PM), TNEB said that TNEB may want to do its portion by themselves.

14.10 ED, SR-II, PGCIL said that the estimates were based on the recent orders.

However, when PGCIL goes for actual tendering, the actual could be in

variance with the estimates. He added that if works are carried out by

different agencies then the responsibility of integration of different systems

would be with the constituents. He suggested that a single agency may take

up the work to avoid interfacing problems.

14.11 Member (Trans.), KSEB said that KSEB was in discussion with PGCIL and

most likely their scope of work would be entrusted to by PGCIL.

14.12 AGM, SRLDC said that this scheme as well as ULDC augmentation scheme

were very much essential for data and information availability and security of

the grid. He added that the matter had wider commercial implications (UI

etc.). He earnestly requested that the project may be done by single agency

i.e., PGCIL, so as to have reliability of grid, and availability of data.

14.13 MS, SRPC said that in interest of work, there should be a single

implementing agency so as to avoid two point control.

14.14 GM (LD&C), PGCIL said that in NR tendering activities had already started.

ER & WR had also agreed that the project be completed by PGCIL. He

added that additional works had also been given by the constituents to be

completed by PGCIL. There was only two years time frame to complete the

works and therefore suggested that the works may be entrusted to PGCIL

without further delay.


28

14.15 After deliberations, TCC recommended that a single agency i.e., Power Grid

may take up the whole project including the State & the Central Sector

Scope. This would also avoid interfacing problems.

15. INFORMATION ON GRID CONNECTED RENEWABLES

15.1 MNRES/CEA have been seeking information regarding grid connected

renewables on monthly basis. While the operation data is to be furnished by

1st of the following month, the detailed station-wise authenticated data is to

be furnished by 10th of the following month. The formats for furnishing data

are enclosed as Annexure-XV. Constituents were requested to kindly

arrange to streamline the process of furnishing the required information.

15.2 In the meeting, CE (GM), CEA emphasized on the need for the data to be

made available regularly. He said that MNRES was facing difficulty in getting

timely information on grid connected renewables. He requested all the

constituents to furnish the information in a timely manner.

16. GRID OPERATION

16.1 National Awards for meritorious performance in Power Sector for the year 2007-08

NTPC’s Talcher Super Thermal Power Station awarded the Gold Shield in the category of awards for Meritorious performance of thermal power stations.

NTPC’s Ramagundam Super Thermal Power Station awarded the Silver Shield in the category of awards for Meritorious performance of thermal power stations.

KPCL’s Gerusoppa Hydro Power Station awarded Bronze Shield in the category of awards for Meritorious performance of hydro power stations.

Power Grid’s 400 kV Gooty-Raichur D/C line awarded Silver Shield in the category of awards for Meritorious performance for early completion of transmission power projects.


29

Andhra Pradesh EPDCL awarded Gold Shield in the category of awards for Meritorious performance in electricity distribution.

Mandal Mahila Samakhya, Kurupam of Andhra Pradesh Discom, and Mandal Mahila Samakhya, Paderu of Andhra Pradesh Discom awarded Gold Shield & Bronze Shield respectively in the category of awards for Meritorious performance for rural distribution franchisees.

16.2 Efforts by Constituents

Good performance by Ramagundam, Simhadri & Vijayawada thermal power stations.

Efforts by TNEB to increase coal stock at thermal stations.

Appreciation for KSEB for making available all the field inputs for ULDC scheme.

High quantum of power imports by AP.

17. HIGH FREQUENCY DURING LOAD CHANGEOVER

17.1 The high frequency phenomena for short duration during the load

changeover periods around 1800 hrs was being observed. Frequency graph

for few days showing such phenomena is enclosed as Annexure-XVI.

Generators and even transmission utilities were facing problems due to this

phenomena. Staggering of loads by the DISCOMs/State utilities is the most

effective way to mitigate the effect of load changeover. Beneficiaries had

been requested to ensure steps to mitigate the problem.

17.2 In the OCC meetings it had been decided that while Tamil Nadu would

complete the change-over before 1800 hours, AP would complete the

change-over between 1800 hrs. to 1830 hrs. Karnataka & Kerala would

stagger the loads during 2200 hrs changeover phenomena. Similar rise in

frequency has also been observed at 2 AM. Sudden release of MVAR

intensive loads, besides leading to high frequency had even led to tripping of

400 kV lines on over voltage.


30

17.3 In the meeting, MS, SRPC expressed concern over the sudden frequency

rise during changeovers.

17.4 AGM, SRLDC said that the issue was being deliberated for last two years but

was not being resolved fully. Frequency was rising by more than 1.0 Hz

during the change over. At times in short interval of time, number of 400 kV

lines were getting tripped and the security of the grid was under threat.

17.5 CE (LD), KPTCL said that backing down of generation was also being carried

out by SLDC, to mitigate the frequency rise.

17.6 Director (Trans.), KPTCL informed that load staggering was being done

among the five DISCOMS in Karnataka.

17.7 AP & TN assured that they would following the timings of load changeovers

and stagger the loads.

17.8 MS, SRPC suggested that AP, Karnataka & TN may implement the time

schedules finalized in the OCC forum in coordination with SRLDC in real

time.

18. FORCED OUTAGES OF THERMAL UNITS

18.1 The issue of forced outages in thermal stations was brought to the notice of

SRPC/TCC in the previous meetings. The forced outages of the thermal

units continue to be on the higher side as can be seen in the table below:

Month Minimum Maximum December 2008 2.69% 9.99% January 2009 1.81% 5.31% February 2009 1.27% 5.12%

18.2 MoP vide letter dated 05.02.2009 (Annexure-XVII) had expressed concern

about the low rate of growth of electricity generation. It had also been

emphasized by MoP that a close watch be kept on long duration outages -


31

planned as well as forced. RPCs had also been asked to furnish an

Exception Report on a monthly basis.

18.3 In the meeting, MS, SRPC expressed concern over the quantum of forced

outages. He added that the issue had been deliberated in number of OCC

meetings and previous SRPC/TCC Meetings. MoP and CEA had

expressed concern over the high quantum of forced outages. He added that

the planned maintenance should be carried as per the Kukde norms and

efforts should be made to minimize the forced outages, so as to have

maximum availability.

18.4 CE (GM), CEA said that MoP had taken a serious note of the issue of

outages. He said that Planned maintenance should be carried out as per

agreed schedule and only in extreme contingency it should be altered. Unit

should be brought back quickly after forced outages. He said that RPC’s

had been asked to furnish exception reports on a monthly basis.

18.5 AGM, SRLDC also expressed concern over the forced outages and

informed that on certain occasions forced outages of more than 2500 MW

had been experienced.

18.6 TCC noted that the forced outages at times were critically high and the

generators should take concrete steps to minimize the same.

18.7 Low Frequency Operation

18.7.1 The issue regarding low frequency operation and overdrawal at low

frequency has been under consideration of all forums of SRPC. The

issue was further deliberated in the OCC meetings held during December

2008 - February 2009. During the period under review, Type ‘A’, Type ‘B’

& Type ‘C’ messages (copy enclosed as Annexure-XVIII) were issued to

the constituents by SRLDC. During the OCC Meetings SRLDC had


32

informed that as per directives of Hon’ble CERC, SRLDC was furnishing

details of over drawals below 49.0 Hz. on a regular basis to them.

Hon’ble CERC was also monitoring instances of simultaneous exports

and overdrawals at frequency less than 49.0 Hz. In view of the above, the

Committee was requested to deliberate on measures for operation of the

grid within the frequency range of 49.0 Hz to 50.5 Hz, as stipulated in the

IEGC. The decision of the Special TCC meeting held in March 2006 to

resort to load shedding at 49.2 Hz itself to avoid the frequency going

below 49.0 Hz at any instant of time was also brought to kind attention.

18.7.2 In the meeting, CE (PM), TNEB requested the Central Generating

Stations to increase the availability, specifically from nuclear stations.

18.7.3 MS, SRPC requested the constituents to maintain grid parameters within

IEGC range, and also operate the grid in a safe and secure manner. The

utilities should not over draw at low frequency he added.

18.7.4 AGM, SRLDC said that Hon’ble CERC was monitoring the over drawals

at frequencies below 49.0 Hz and 49.2 Hz on a weekly basis. He

informed that since last 10 days, the regional frequency profile had

deteriorated considerably. He added that the grid was presently in a

critical condition and SRLDC had accordingly, apprised the constituents

at the highest level. He requested the constituents to operate the grid as

per the stipulated regulations.

18.7.5 All the constituents assured that the grid would be operated in safe and

secure manner and within IEGC range.

18.8 Utilization of Intra-Regional Power

18.8.1 The need for utilizing the intra-regional power within the region has been

highlighted at various forums of SRPC keeping in view the technical and


33

commercial advantages accruing to the constituents. The

requirement/surplus information furnished by the constituents is available

on SRPC web site to facilitate intra-regional exchange of power.

18.8.2 In the Special TCC meeting held on 09.08.2008, TCC had suggested that

commercial and administrative arrangements be tied up among states in

Southern Region to avail the surplus IPP/Captive/URS/State Sector

Power available within the region specifically so that it could be utilized by

the needy state in real time avoiding delays on account of any

commercial and administrative reasons.

18.9 Tripping of radial feeders as regulatory measure to maintain frequency

18.9.1 In this context, kind attention of the constituents was drawn to Clause

5.4.2(c) of IEGC in the previous SRPC meetings.

18.9.2 In the 31st & 32nd OCC meetings, SRLDC had again sought revision of

quantum of tripping to be obtained on radial feeders as regulatory

measures (copy enclosed as Annexure-XIX). It was also noted that the

response on the steps taken needed to be furnished to SRLDC on a

regular basis. In case an identified feeder had already been tripped,

action needed to be taken to trip another feeder so that desired relief as

instructed by SRLDC was obtained, lest system security might get

jeopardized. MS, SRPC had requested the constituents to make full use

of ULDC features so as to have centralized control.

18.10 Under Frequency Relay

Special TCC in its meeting on 09.08.2008 had recommended that all UFRs

be strictly in service and available as per the agreed quantum of relief, on

designated feeders and settings. It had also been stressed that the UF

relays be made fully effective by all the utilities so as to give the designated

relief at specified frequency levels.


34

18.11 Grid Events (December 2008 –February 2009)

• Frequency remained within IEGC range (49.0 Hz to 50.5 Hz) for 97.29% of time.

• Frequency remained below 49.0 Hz for 2.53% of time and average frequency was 49.34 Hz.

• Southern Region met a maximum demand of 26200 MW on 12.02.2009 which was maximum till date.

• Andhra Pradesh met a maximum per day consumption of 210.59 MU which was maximum till date.

• Andhra Pradesh met a maximum of 10121 MW (Gross) on 28.02.2009 which was maximum till date.

• Karnataka met a maximum demand of 6237 MW on 28.01.2009 which was maximum till date.

• Tamil Nadu & IPPs/CPPs exported 165 MU & 161 MU respectively during the above period by way of bilateral exports to recipients in other regions.

• Andhra Pradesh, Karnataka, Kerala & Tamil Nadu imported 908 MU, 99 MU, 160 MU & 353 MU from other Regions during the above period.

• Andhra Pradesh & Kerala imported 49 MU & 2 MU intra-regionally during the above period.

• Utilities of Andhra Pradesh, Karnataka, Kerala and Tamil Nadu imported 253 MU, 20 MU, 78 MU & 166 MU from Power Exchanges during the above period.

• 1st & 2nd Unit of 115 MW (peaking station) units at Varahi were commissioned on 03.01.2009 and 14.01.2009 by KPCL.

• LILO of Gazuwaka-VSS 220 kV line at Gangavaram Port charged on 11.12.2008 by APTRANSCO.

• 31.5 MVA, 220/33 kV transformer at Gangavaram Port S/S commissioned on 11.12.2008 by APTRANSCO.

• 220 kV line from Peenya-Somanahalli to Vrushabhavathi commissioned on 29.12.2008 by KPTCL.

• 220 kV S/C LILO of Mahalingapur-Kudachi at Athani commissioned on 15.12.2008 by KPTCL.

• 220 kV S/C LILO of B Bagewadi-Indi line at Bijapur charged on 18.12.2008 by KPTCL.


35

• 220 kV D/C line to Shiralkoppa in Shimoga commissioned on 19.12.2008 by KPTCL.

• 1x100 MVA, 220/110 kV transformer at Athani commissioned on 15.12.2008 by KPTCL.

• 2x100 MVA, 220/110 kV transformer at Bijapur test charged on 19.12.2008 by KPTCL.

• 1x100 MVA (2nd transformer), 220/66 kV transformer at HAL commissioned on 06.12.2008 by KPTCL.

• 150 MVA, 220/66 kV transformer at Vrushabhavathi commissioned on 29.12.2008 by KPTCL.

• 1x100 MVA, 220/110 kV transformer at Shrialkoppa charged on 19.12.2008 by KPTCL.

• LILO to Neyveli TS-II from Neyveli Zero Unit to transfer Cuddalore SS load energized on 19.12.2008 by TNEB.

• 2x50 MVA, 230/33 kV transformer at Amuthapuram commissioned on 1.12.2008 by TNEB.

• 1x50 MVA (2nd transformer), 230/33 kV transformer at Udayathur commissioned on 27.12.2008 by TNEB.

• Upgradation of transformer from 80 MVA to 100 MVA, 230/110 kV at Kadapperi commissioned on 6.12.2008 by TNEB.

• Upgradation of transformer from 80 MVA to 100 MVA (2x50 MVA), 230/110 kV at Ingur commissioned on 20.12.2008 by TNEB.

18.12 Grid Frequency

The month-wise frequency profile of the region for the months of December

2008 - February 2009 is given in Table – I below:

Table-I

Month Less than

48.5 Hz

48.5 Hz to 49.0 Hz

49.0 Hz to 49.5 Hz

49.5 Hz to

50.0 Hz

50.0Hz to

50.5 Hz

More than

50.5 Hz

Month average

Hz

Within IEGC range49.0 Hz to

50.5 Hz

Dec. 2008 0.00 1.53 71.22 18.04 8.92 0.29 49.34 98.18

Jan. 2009 0.00 1.49 70.90 19.12 8.32 0.17 49.33 98.34

Feb.2009 0.00 4.80 80.72 12.43 1.98 0.07 49.23 95.13


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18.13 Hydro Availability

The storage levels in the major hydel reservoirs in MU as on 28th February

2009 is given in Table - II below:

Table-II

Energy storage in major hydel reservoirs

Inflows during April 2008 - February 2009 (in MU)

Storage as on 28th Feb. 2009

At FRL

(in MU) Anticipated Actuals MU % ANDHRAPRADESH Jalaput Srisailam

495

-

689 2762

541 4129

321

-

65 -

KARNATAKA Linganamakki Supa+B’Halli+T’Halli

4547 3152

5143 2484

4900 3010

1843 1052

41 33

KERALA Idukki Pamba & Kakki Total Kerala

2190 916 4131

2445 1566 6792

1889 1218 5249

827 684 2019

38 75 49

TAMIL NADU Nilgiris Total Tamil Nadu (excluding Mettur)

1504 2182

2116 3915

1978 3525

651 924

43 42

The reservoir position as on 28th February 2009 was about 42% for the

Southern Region.

18.14 Grid Voltages

SR grid had been experiencing sustained over voltage conditions during the

monsoon period and low demand period and there have been resultant

manual/automatic trippings of both Central and State Sector 400 kV lines. It

had been addressed regularly in the OCC that adoption of adequate voltage

management measures by the constituents would improve the situation.

The grid voltages at the selected 400 kV stations in SR are given in Table-III

below:


37

Table – III Voltage profile in kV at the selected 400 kV Sub-stations

for the months of December 2008 & February 2009

400 kV Stations December 2008 January 2009 February 2009

Average of Average of Average of Max. Min. Max. Min. Max. Min. Hyderabad 414 398 412 395 407 390 Ramagundam 415 405 413 402 407 398 Nagarjunasagar 418 402 416 400 412 395 Cuddapah 424 404 421 399 417 394 Vijayawada 427 410 427 410 425 409 Gooty 422 404 418 400 415 396 Gazuwaka 425 414 426 416 426 414 Bangalore 413 391 410 389 412 388 Kolar 420 399 415 397 416 396 Narendra 412 397 413 398 412 399 Thiruvanathapuram 421 401 424 407 419 404 Trichur 410 393 407 389 407 389 Chennai 420 399 418 394 416 391 Hosur 414 395 410 393 411 393 Neyveli-II 418 405 416 405 414 404

The Constituents were requested to improve.

18.15 Short term/long-term measures to contain over voltages

The issue of over voltages had also been taken up in the various OCC

meetings and short-term measures like

Switching off of the capacitors

• Putting reactors into service

• Identifying the optimal tap positions

• Opening of parallel lightly loaded lines

• Absorption of VARs by units within their capability limits

• Running of units in synchronous condenser mode

• Export to other regions through bilateral exchanges

• Export to other regions as UI power


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etc. had been discussed. Specific steps taken by constituents to contain

over voltage had been discussed.

18.16 VAR absorption by Generators within capability limits

18.16.1 The issue of VAR absorption was discussed in the OCC meetings. In

view of the high voltage conditions being faced in Southern Region during

low demand period, the MVAR absorption capability of various generators

may be utilized in improving the voltage condition of the grid.

18.16.2 It is for information that in respect of new generating stations, Clause

1(10) under Part-II (Grid Connectivity Standards applicable to the

Generating Units) of Ministry of Power (Central Electricity Authority)

Notification dated 21st February 2007 stipulates that “Hydro generating

units having rated capacity of 50 MW and above shall be capable of

operation in synchronous condenser mode, wherever feasible”.

18.17 Installation of Shunt Capacitors

18.17.1 Installation of new capacitors matching with the demand growth, along

with monitoring the healthiness of existing capacitors in the grid, is a

continuous process for maintaining good voltage profile at main as well as

at far away grid stations.

18.17.2 The progress of installation of capacitors by the constituents during the

year 2008-09 is given in Table -IV below:

Table – IV (Figures in MVAR)

Capacitors as per the assessment of System Studies Sub-Committee

of SRPC Installed during the

year 2008-09$

Andhra Pradesh 55 * 0 Karnataka 155 7.2 Kerala 0 0 Tamil Nadu 101 0 Total 311 7.2

* by relocation $ upto February 2009


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18.18 Pending field inputs under ULDC scheme

SRLDC had informed that for monitoring of grid & running EMS package, the

availability of data at SLDCs/RLDC needed to be improved. In case of some

of the constituents, large number of SCADA inputs continued to remain

pending as per Annexure-XX. This issue had been regularly deliberated in

the OCC meetings also.

19. DEMAND VARIATION (Peak Vs Off-peak)

19.1 The issue regarding large variation between minimum and maximum

demands had been under the consideration of TCC/SRPC. The issue was

being taken up regularly in the OCC meetings, wherein the following was

observed for the months of December 2008 - February 2009:

Minimum to Maximum Demand Variation % Month Andhra

Pradesh Karnataka Kerala Tamil Nadu Puducherry Southern

Region December 2008

Highest 36.47 53.19 50.53 33.50 37.63 32.58 Date 21st 1st 24th 29th 2nd 1st Lowest 21.03 37.79 35.24 20.33 16.30 21.32 Date 31st 27th 3rd 14th 20th 14th Average 24 45 41 27 24 27

January 2009 Highest 33.52 47.27 45.54 34.79 33.99 29.36 Date 5th 15th 5th 17th 16th 14th Lowest 16.02 27.45 36.15 22.95 17.09 16.93 Date 12th 8th 25th 24th 14th 26th Average 23 41 41 28 27 23

February 2009 Highest 26.30 40.32 42.11 30.71 40.19 21.92 Date 8th 2nd 2nd 9th 28th 2nd Lowest 12.36 22.21 28.99 12.74 13.60 10.59 Date 27th 24th 28th 28th 1st 28th Average 21 34 36 23 24 17

Note: Highest & lowest figures for the month have been computed based on the daily values during the month.

19.2 During the deliberations in the OCC meetings, OCC had expressed that

constituents initiate all possible measures to bridge demand-supply gap by

appropriate Demand Side Management, Supply Side Management & Energy


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Efficiency Programmes as there were energy and demand shortages faced

by the constituents of Southern Region.

20. STATUS OF THE NEW GENERATING SCHEME

20.1 SRPC had desired that the status of the Generating Schemes coming up in

Southern Region should also form part of the Agenda. It was noted that this

information would be extremely useful in planning the load generation

balance for future and would also help in identifying possible bottlenecks and

taking necessary corrective action in time.

20.2 The updated information as communicated by the constituents is given at

Annexure-XXI.

21. ESTABLISHMENT OF YELAHANKA SUBSTATION

21.1 ED (OS), PGCIL vide letter dated 19.02.2009 (refer Annexure-VII) had

stated that with regard to acquiring of land for 400 kV substation at

Yelahanka, there were certain problems being experienced. KPTCL had

acquired 35 acres of land and offered to POWERGRID recently. Since the

land was of irregular shape, for establishment of conventional 400 kV

substation, additional land of 2.5 acres would be required. The proposed

land was observed to have some encroachments on the western side. The

additional 2.5 acres of land required was under litigation in the High Court of

Karnataka. Unless the encroachment is removed and additional 2.5 acres of

land was acquired, establishment of conventional substation would not be

possible. It had also been informed that after study, it had been found

feasible to establish the substation with 400 kV as Gas Insulated Substation

(GIS) and 220 kV side as AIS. Beneficiaries had been requested to concur

for establishment of 400 kV GIS pending ratification in the Standing

Committee on Power System Planning.


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21.2 In the meeting, it was noted that the issue had also been recommended for

approval of SRPC by the Standing Committee of PSPSR.

22. COMMISSIONING OF 3rd TRANSFORMER AT UDUMALPET

22.1 ED (OS), PGCIL, vide letter dated 19.02.2009 (refer Annexure-VII) had

stated that the 3rd transformer at Udumalpet and associated bays to be

established under Kudankulam transmission system would be ready for

commissioning shortly. POWERGRID had proposed for preponement of

commissioning of the transformer to enhance reliability at Udumalpet. TNEB

had been requested to concur to enable POWERGRID proceed further.

22.2 In the meeting, ED, SR-II, PGCIL said that the commissioning of Udumalpet

Transformer would increase reliability of the system.

22.3 TNEB representative said that the issue could be discussed in SRPC

meeting.

23. LTOA CONCURRENCE

23.1 ED (OS), PGCIL vide letter dated 19th February 2009 (refer Annexure-VII)

had stated that in the 8th SRPC Meeting, long term open access was

approved with respect to a number of open access applicants which included

amongst others M/s. LANCO, Kondapalli. The target beneficiaries of that

project with installed capacity of 375 MW were 200 MW in WR and 150 MW

in NR. It had been stated that as per the project developer, the project was

likely to be commissioned by June 2009 and that the beneficiaries for the

same also needed to be finalised. It had been proposed that pending

finalisation of beneficiaries by the developer, connectivity of the project to

Vijayawada as approved in the 8th SRPC Meeting may be agreed. It had

also been mentioned that upon commissioning of generation units, the plant

would operate as merchant power plant, by paying applicable transmission


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charges in addition to LTOA charges till finalisation of beneficiaries.

23.2 In the meeting, SE (O), SRPC said that the connectivity of Lanco –

Vijayawada had already been agreed in the previous SRPC meeting.

23.3 GM (Engg.), PGCIL said that the beneficiaries had not been identified by the

developer. The developer wanted connectivity to the Regional Grid and

would be selling power on STOA basis to the beneficiaries. If connectivity

was given, 375 MW additional power would be available from June 2009

onwards. The developer was willing to pay the LTOA charges of SR grid and

all other applicable charges.

23.4 Consultant, TNEB said that the cost of the dedicated line should be borne by

the developer himself.

23.5 PGCIL clarified that as per regulation 33 of new CERC (Terms & Conditions

of Tariff) Regulation, 2009, the developer was to pay for the dedicated

transmission system.

23.6 After deliberations, TCC recommended for approval of the connectivity

(Lanco-Vijayawada) to SR grid. Lanco would pay the LTOA charges of SR

grid and other applicable charges. Lanco-Vijayawada line would be

constructed by the developer.

24. RECONFIGURATION OF 400 kV DIAMETER AT 400/230 kV ALMATHY S/S 24.1 ED (OS), PGCIL vide letter dated 19th February 2009 (refer Annexure-VII )

had mentioned that at 400 kV Almathy substation, Nellore-Almathy D/C line

and Almathy-Sriperumbudur D/C line have been terminated in such a way

that feeders from Sriperumbudur occupy one diameter and feeders from

Nellore occupy another diameter, causing operational exigencies at times.

Since Almathy substation is a vital link, to improve the reliability it had been

suggested to rearrange the line terminations as shown in the Single Line

Diagram.


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24.2 In the meeting, AGM, SRLDC said that due to operation difficulties and also

to improve reliability he requested that the terminations may be rearranged

as given in the Annexure-XXII. He apprised the Committee of the difficulties

faced on 22nd October 2008 when both the lines got tripped due to breaker

problem. He added that as per studies conducted, with the tripping of

Almathy - Sriperumbudur line, the 230 kV system in Tamil Nadu was getting

stressed.

24.3 SE (O), SRPC enquired whether the existing arrangement was a standard

design feature of PGCIL or not.

24.4 ED, SR-II, PGCIL said that the existing arrangement was in place for about 5

years and in the coming 2 years existing line configuration was likely to be

changed. He therefore suggested that the existing arrangement could

continue.

24.5 After deliberations, it was decided that the existing line configuration would

continue, since the configuration was planned to be changed in the coming 2

years.

25. RENOVATION AND MODERNISATION OF SRPC OFFICE COMPLEX

25.1 SRPC office building was constructed sometime in 1976. Since about 30

years have lapsed since building construction, the office complex is in need

of renovation and modernisation (R&M). In addition, there is a need to

update the old computer machines and their peripherals/networking in the

SRPC Secretariat. R&M and strengthening of RPC’s has also been

discussed in a meeting taken by Chairperson, CEA on 02.02.2009

(Annexure-XXIII) wherein it was decided that the respective RPCs would

approach the respective constituents with a proposal and obtain their

approval for R&M Scheme. The tentative cost estimates for the renovation

and modernisation works is given at Annexure-XXIV. It was proposed to


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take up the works in the beginning of financial year 2009-10. In principle

approval was sought for taking up the works as envisaged. It was also

proposed that the renovation works be carried out through the good offices of

POWERGRID. Necessary funds for this proposal would be placed with

POWERGRID. The R&M works are proposed to be carried out on a one

time basis. The budget estimate figures for 2009-10 in respect of SRPC

Secretariat are awaited from CEA, New Delhi. As per SRPC decision, the

reimbursement of BE for 2009-10 would be sought from the Members of

SRPC further subject to any adjustments.

25.2 MS, SRPC apprised the Committee about the need for renovation and

modernization of SRPC complex.

25.3 CE (GM), CEA said that the constituents were already reimbursing the SRPC

expenditure, and requested for concurrence.

25.4 ED, SR-II, PGCIL said that there were two issues involved in this matter –

one relating to concurrence of expenditure and secondly about the executing

agency. While Power Grid was agreeable for the sharing of expenditure, in

case there was a consensus, it had reservations regarding the executing

agency being Power Grid. He added that about 5 years ago, Power Grid had

offered to carry out the renovation works under ULDC but the offer was not

taken then.

25.5 TCC recommended for approval of SRPC the reimbursement of expenditure

for renovation and modernization of SRPC complex. The executing agency

could be finalized later.

26. REVISION OF UNSCHEDULED INTERCHANGE CHARGES 26.1 MS, SRPC informed about the letter 24.02.2009 from PCKL (copy enclosed

as Annexure-XXV) regarding revision of Unscheduled Interchange charges.


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26.2 It was noted that Hon’ble CERC had issued draft regulations on Unscheduled

Interchange charges, in which it was suggested to bring down the maximum

UI charges to Rs. 7.35. Constituents were suggested to furnish their

comments individually to the Commission.

26.3 Director (Trans.), KPTCL said that since the Naptha prices had come down

the UI prices should also be reduced. He added that the UI prices were

influencing the cost of the power in the market to a great extent.

27. TRIPPING OF TUTICORIN GENERATING UNITS IN TAMIL NADU

27.1 MS, SRPC informed about the letter dated 27.02.2009 from AGM, SRLDC

(copy enclosed as Annexure-XXVI) regarding tripping of Tuticorin generating

units in Tamil Nadu.

27.2 AGM, SRLDC expressed concern over the tripping of Tuticorin units on

26.02.2009 when around 850 MW generation was lost. He said that number

of lines had tripped in that area due to fog and TN could have regulated the

generation at Tuticorin. He added that even in Karnataka, fog related

trippings were taking place in Nagjhari area. He requested the constituents to

identify fog affected areas in their respective system for remedial action.

27.3 CE (GM), CEA informed that fog related trippings had occurred in the

Northern Region also. An expert Committee had identified the areas where

insulators could be affected by pollution and fog. In such areas, porcelain

insulators were being replaced by polymer insulators. Hence SR States

should also identify lines which were getting affected by pollution and fog and

initiate necessary remedial actions similarly.

27.4 ED, SR-II, PGCIL informed that PGCIL had already initiated action for

replacement of insulators in lines, as approved in the previous SRPC

meeting.


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28. REVIEW OF PROGRESS OF WORKS ON NEW TRANSMISSION LINES AND SUBSTATIONS

28.1 The progress of works on the new 400 kV/230 kV transmission lines and

substations in the State Sector under construction in the Southern Region

was reviewed. The updated information based on the data furnished by the

constituents is at Annexure-XXVII.

28.2 The progress of works on the new transmission line and substations in the

Central Sector (POWERGRID) under construction in Southern Region was

reviewed. The updated information is at Annexure-XXVIII.

29. DATE & VENUE OF THE NEXT TCC MEETING

It was decided to hold 9th TCC meeting one day prior to the 10th SRPC meeting.

30. VOTE OF THANKS

CE (PM), TNEB thanked the Members and delegates for the cooperation

extended for the conduct of the Meeting.

***

MINUTES OF THE 8TH MEETING OF TCC OF SRPC HELD AT KUMARAKOM … · to Kumarakom, Kerala also known...

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