Scanned by CamScanner · MINUTES OF 476TH MEETING OF OPERATION & COORDINATION SUB-COMMITTEE OF WRPC HELD ON 14TH OCTOBER 2015 AT APML TIRODA The 476th meeting of Operation & Co-ordination

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MINUTES OF 476TH MEETING OF OPERATION & COORDINATION SUB-COMMITTEE OF WRPC

HELD ON 14TH OCTOBER 2015 AT APML TIRODA

The 476th meeting of Operation & Co-ordination Sub-Committee of WRPC was

held on 14th October 2015 at APML Tiroda. The list of participants is enclosed at

Annexure-A. Shri Jaidev Nanda, Chief Operating Officer (COO), Adani Power Limited welcomed all

delegates of the 476th OCC meeting. He thanked WRPC for providing the opportunity

of hosting the 476th OCC meeting at Tiroda.

He told that the WRPC is a very important forum in terms of the gravity of the

discussion and decisions taken. He also told that for power producers like Adani and

the consumers like the state utilities, this forum is the best platform for resolving

issues and arriving at fruitful decisions.

He further informed that Adani group has evolved into a global organization by

creating a presence in multiple businesses across nations like India, Australia, China,

South Africa, Indonesia, Singapore to name a few. With the vision of creating a ‘power

full’ India, Adani group ventured into the power business in the year 2006. Starting

with the initial plant of 330 MW at Mundra. Now APL currently has an installed

capacity base of 10440 MW, making Adani Power Limited the largest private power

producers in India.

He further added that Adani Power Limited’s Mundra Power Plant in Gujarat with the

capacity of 4620 MW is fully operational. At Tiroda, Maharashtra, Adani Power Limited

have a 3300 MW and in Rajasthan, It has a 1320 MW plant in Kawai. Recently Adani

Power Limited has acquired the 1200 MW plant at Udupi in Karnataka. Today Adani

power operates 12 supercritical units which is of course the highest by any power

generating company in India. In line with its commitment towards green energy, Adani

Power Limited is also operating a 40 MW solar power plant in Bitta, Gujarat. To

complete the value chain in power supply, Adani has forayed into power transmission

by commissioning more than 5500 circuit Kms of transmission lines across India.

Adani Power is also erecting a 648 MW solar power plant at Kamuthi in Tamil Nadu

which will make it the world’s largest single location solar power plant.

Some of the major milestones that Adani Power has achieved in its journey of power

generation till date are –

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• Commissioning the first supercritical 660 MW unit in India.

• Being the world’s first supercritical technology based thermal power project to

have received ‘Clean Development Mechanism (CDM) Project’ certification

from United Nations Framework Convention on Climate Change (UNFCCC).

• Constructing, erecting, commissioning and operating 1000 km long 500KV Bi-

pole HVDC line connecting Mundra in Gujarat to Mohindergarh in Haryana

making it the first HVDC line by a private player in India.

• Operating a unique under Rail system, a first of its kind in power generation

here at Tiroda.

Shri S D Taksande, Member Secretary, WRPC extended warm welcome to all the

participants of the 476th OCCM. He expressed his gratitude to Shri Jaidev Nanda,

Chief Operating Officer (COO), APL, Shri C P Sahoo, Station Head, APML Tiroda,

and all Chief Engineers of SLDCs, Shri P.B.Behere GM NTPC for making themselves

available for meeting.

Shri S D Taksande, Member Secretary, WRPC thanked the whole group of Adani

Power Limited, particularly Shri Ajit Barodia, AVP & Shri Akshay Mathur, GM Adani

Power Limited for arranging every aspect of the meeting metaculously.

He highlighted the need of industrialization for the development of the economy. On

the other hand he also emphasized on awareness about environmental issues

occurring due to industrialization. He told that, for a developing country like India,

environmental issues must not be neglected in the wake of rapid industrialization. He

firmly told all the participants of 476th OCCM that Organization like Adani Power

Limited has shown that both the things i.e. industrialization and environmental

protection can go hand in hand. He also praised the management of Adani Power

Limited for a beautiful and clean Township and Office complex.

Shri S D Taksande, Member Secretary, WRPC highlighted the following events which

took place since last OCC meeting:

1. He informed that due to Synchronization of 765 kV Sholapur-Aurangabad D/C

lines, power flow pattern has changed in Maharashtra system and it has also

got consequences on ATC/TTC in WR/SR. WRLDC gave presentation

explaining the dramatic change in flow pattern occurring from the

synchronization of this line and necessity of modifying the SPS. He further

added that NLDC and WRLDC will modify SPS scheme and it will be discussed

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in WRPC Protection meeting.

2. He further informed that power flow scenario between WR-SR may be changed

after synchronization of 765 kV Narendra Nagar(Karnataka)-

Kolhapur(Maharashtra) which is to take place in next couple of month.

3. He told that MSETCL will file a petition on behalf of other beneficiaries to

counter the issues and difficulties faced in DSM Methodology by the end of this

month.

4. He informed that 30th WRPC meeting will be held on 23rd & 24th November,

2015 at Bhubneshwar. A meeting on SCADA/URTDSM was held on

09.10.2015 at WRLDC.

5. A Workshop on detailed Procedure For Ancillary Services Operations & its

implementation will be conducted on 16.10.2015 at NLDC. WR constituents will

attend the same through VC.

6. He informed that WR crossed the demand of 48000 MW which is highest

forever.

7. He informed that 765 kV Jabalpur – Dharamjaigarh has been synchronized

during last month which may further helpful in evacuation of power from W-3

area to NR.

Thereafter he requested SE (OPN), WRPC to take up regular agenda items in seriatim

for discussion.

ITEM No. 1: CONFIRMATION OF THE MINUTES

SE(O), WRPC stated that minutes of 475th meeting of Operation & Coordination Sub-

Committee of WRPC held on 10th September 2015 at Mumbai were forwarded vide letter

No. WRPC/OPN/OCC-Minutes/2015-16/7955 dated 22.09.2015.

No comments have been received. Therefore minutes were confirmed as it is. The Sub-Committee noted as above. ITEM NO.2: REVIEW OF SYSTEM OPERATION DURING THE MONTH OF

SEPTEMBER 2015. SE(OPN),WRPC requested WRLDC to brief the Committee on Grid Operation

experiences during September 2015.

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CM, WRLDC in the presentation (copy attached at Annexure – 2 in soft copy)

concentrated broadly on the performance of the grid for month of September 2015 as

below:

2.1 Frequency Particulars The average frequency during the month of September, 2015 was 49.95 Hz. The

maximum instantaneous frequency was 50.33 Hz at 16:06 hrs on 20th September-15

while minimum instantaneous frequency was 49.52 Hz at 19:13 hrs on 03 September -

15. The frequency profile during September, 2015 was as under:

01st September 2015 to 30th September 2015 % time

IEGC band (49.9 < f < 50.05 Hz) 59.83

< 49.9 Hz 29.39

> 50.05 Hz 10.78

The Sub-Committee noted.

2.2 Inter-regional Exchanges There was a net inter-regional export of 5504.00 MUs by WR against net export

schedule of 5165.00 MUs.

The Sub-Committee noted. 2.3 Voltage Profile

Voltage profile at some of 765/400 kV sub-stations during the month of September

2015 furnished by WRLDC is enclosed at Annex-2.3.

The Sub-Committee noted as above. 2.4 U/F Relay Operations

As per WRLDC records during September 2015 the system frequency didn’t touch 49.2

Hz and no UFR operation has been reported by WRLDC.

The UFR operation status reported by constituents is enclosed at Annexure-2.4.

The Sub-Committee noted as above. 2.5 Power Cuts / Load Restrictions

Details of Power Cuts and Regulatory measures during September 2015 as furnished by

the state utilities are given in Annex. 2.5.

The Sub-Committee noted as above.

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2.6 Details of Generating Units under Forced outages

Details of generating units under forced outages during September 2015 are given in Annex-2.6.


2.7 Details of Generating Units under Planned outages

The details of generating units under Planned Outages during September 2015 are given in Annex-2.7


ITEM NO.3: OPERATIONAL PLANNING 3.1 Proposed Planned maintenance programme of generating units.

The maintenance programme of generating units for October 2015 & November

2015 was discussed.

The finalized outage schedule of generating units for the above period and the modified

outages plan is placed at Annexure-3.1.

The Sub-Committee agreed as above. 3.2 OUTAGE PROGRAMME OF TRANSMISSION LINES/ELEMENTS

Maintenance programme for transmission lines during the months for October 2015 &

November 2015 were discussed.

The outages planned agreed during the meeting is given in Annex 3.2.

The Sub-Committee agreed/noted for the same. 3.3 ANTICIPATED POWER SUPPLY POSITION FOR THE MONTHS – OCTOBER 2015 &

NOVEMBER - 2015

Details of anticipated restricted & un-restricted demands for the months of October 2015

& November 2015 are given in Annex 3.3.

The Sub-Committee noted the same. ITEM NO. 4: OPERATIONAL STATISTICS FOR THE MONTH OF SEPTEMBER 2015 The details of actual generation, demand, drawl of power from grid; exchanges etc. are given in the following Annexure:

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Annex 4.1 - Actual Generation and Requirement for September 2015 Annex 4.2 - Peak Demand: Schedule Vs Actual for September 2015 Annex 4.3 - Integrated Operation of the System and Operation of Inter State Tie lines

for September 2015. Annex 4.5- Details of Declared Capacity, Schedules and Injections from Central sector stations, Drawl Schedules and Entitlements of constituents during September 2015 Annex 4.6 - Inter System Exchanges for September 2015. Annex 4.7 – Details of level of Major Reservoirs in Western Region for Month of September 2015.


ITEM NO. 5: SYSTEM DISTURBANCES IN WESTERN REGION There was no major grid disturbance in the Western Region during the month of

September 2015. However the details of minor incidences during the month received

from WRLDC are enclosed at Annexure-5. The Sub-Committee noted as above. ITEM NO. 6: Healthiness status of SERs/DRs of equipment in the system. Constituents have furnished the status of healthiness of SER/DRs in their systems on the dates below:

Sl No. Name of constituents

Date of Receipt

1 PGCIL,WRTS-I 04.10.2015 2 PGCIL,WRTS-II 06.10.2015 3 MPPTCL 14.10.2015 4 NTPC 03.10.2015 5 CSPTCL 03.10.2015 6 GETCO 06.10.2015 7 MSETCL 10.10.2015

Constituents of WR were requested to ensure healthiness and sent information to this

office regularly as per the recommendation of enquiry committee of Grid disturbances on

25.02.2007 and 28.02.2007.


ITEM NO. 7: STATUS OF COMPLETION OF ONGOING SCHEMES FOR COMMISSIONING OF REACTORS, TRANSMISSION LINES AND GENERATING UNITS IN WR.

7.1 Status of completion of ongoing Schemes for Commissioning of reactors. The present status regarding schedule and commissioning of reactors is as below:

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S. No.

400 kV Sub/stn.

Size (MVAR)

Implementing agency

Expected commissioning date

1 Nanded 125 MVAR MSETCL June – 2016

2 Sholapur 125 MVAR MSETCL June – 2016

3 Kolhapur 125 MVAR MSETCL June – 2016

4 Akola 125 MVAR MSETCL June – 2016

*5 Nagda 125 MVAR MPPTCL December – 2015

6 Bhopal 80 MVAR MPPTCL Commissioned on 27th August 2015

7 ISP 125 MVAR NHDC December 2015

8 Line reactor at Nagda-ISP line at Nagda end

50MVAR MPPTCL March 2016

11 Satpura 50 MVAR MPPGCL April-2016

12 Sasan Bus reactor

240 MVAR RELIANCE Commissioned on 23rd May-2015

*50 MVAR existing bus reactor to be shifted to Nagda-ISP line as line reactor after commissioning of 125 MVAr reactor at Nagda. Utilities are requested to ensure that reactors are installed and commissioned according to the schedule agreed as above. Sub-Committee noted as above.

7.2 Status of completion of 765/400 kV and above ongoing Transmission Schemes being executed/implemented by Transmission Agencies.

The updated status on various ongoing transmission schemes for the current year as

per the current information available is as follows: -

S. No.

Name of the Line Target Completion Date

Remarks

POWERGRID 1 400 kV Navsari – Kudus D/C Line Nov -15 ROW/Forest problem 2 765 kV Gwalior - Jaipur line -I Commissioned on 13.08.15

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765 kV Gwalior - Jaipur line -I I Commissioned on 11.08.153 765 kV Dharamjaygarh - Jabalpur

Pooling Station D/C line Oct -15

4 765 kV Wardha –Nizamabad-Hyderabad D/C

March-16

5 765 kV Narendra-Kolhapur D/C Oct-15 6 400 kV Aurangabad - Boisar line D/C

line Dec -2015

7 765 kV Aurangabad (PG) - Padghe (PG) D/C

Dec -2015

8 800kV Champa – Kurukshetra Bipole Dec- 2015 9 765 kV Aurangabad- Solapur D/C

line Oct- 2015 Charged on 30.09.2015

10 LILO of both circuits of Aurangabad – Pune 400 kV D/c line at Pune 765/400 kV GIS

Oct -15

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400 kV Parli-Pune(Sikarapur) LILO at Sikarapur

Commissioned on 24.02.2015

12 765 kV Raipur – Champa 765 kV Raigarh - Champa

Commissioned on 28.05.2015 Commissioned on 29.05.2015

13 765 kV Indore-Vadodara Commissioned on 05.06.2015 14 400 kV Vadodara-Asoj Commissioned on 27.06.2015 15 400 kV Vadodara-Pirana Commissioned on 27.06.2015 16 765kV Dharmjaigad-Rachi-II Dec-2015 17 400 KV Solapur(NTPC)-Solapur(PG)

ckt-I Commissioned on 10.07.2015

18 765 kV Aurangabad-Solapur D/C Commissioned on 30.09.2015 CHHATTISHGARH 1 400 kV Korba west- Marwa

400 kV Marwa- Khedamara Commissioned on

13.06.2015 2 400 kV DCDS Raipur(Raita)-

Jagdalpur(DCDS) Mar- 2016

3 220 kV DCDS lines Chhuri to Mopka (Bilaspur), (DCDS)

Nov – 2015

4 LILO of 220 kV Raigarh-Budipadar at 400 kV PGCIL S/s Raigarh

Dec-15 Under discussion with Orissa and ERLDC

5 LILO of 220 Korba (E)- Bishrampur line at 220 kV Churri S/s

Commissioned on 01/05/2015.

GUJARAT 1 400 kV D/C Mundra-Zerda line No. 1 Dec -2015 2 400 kV D/C Mundra-Zerda line No. 2 Dec -2015 3 400 kV D/C Vadinar-Amreli line Dec -2015 4 400kV APL-Hadala LILO to Halvad Dec -2015 5 400 kV D/C Amreli-Kasor line(Part-1) Dec -2015 6 400 kV Charanka- Veloda Dec -2015

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MADHYA PRADESH 1 Satpura TPH-Ashta 400KV DCDS

Line 1st ckt commissioned on

30th March 2015. 2nd ckt – expected by Nov 2015.

MAHARASHTRA(STU) 1 400KV D/C line from Koradi-(II) to

Wardha S/S(PG) D/C Dec – 2015 7.5 km stringing is balance

2 LILO of 400 kV Chandrapur-Parli at Nanded Dec-15

3 2x1500 MVA 765/400 kV, ICTs at Ektuni Dec -15

4 400 kV Bableshwar-Kudus D/C (Quad) August -16

5 765 kV Akola(II)-Ektuni -2 (charge at 400kV at Tapthithanda)

Charge at 400kV at Tapthithanda on 20.05.2015

6 400kV IEPL-Warora Dec- 2015 Line completed, legal issues being resolved GUJARAT (IPTC route) by WR Transmission (Guj) Pvt. Ltd

1 400 kV Rajgarh(PG)-Karamsad (GETCO) D/C Dec- 2015

Letter written to concerned agency

STERLITE (JTCL) 1

765 kV Dhramjaygarh - Jabalpur (JTCL) D/C line ckt 3 & 4.

Oct -2015 Ckt-I Commissioned on 12.09.15 Ckt-II Commissioned on 13.09.15

2 765 kV Jabalpur - Bina (JTCL) S/c Charged on 30th June

2015. 3 400 kV Sujalpur-Kota(IR by RTCL) Dec – 2015 STERLITE (BDTCL) 1 765 kV Vadodara - Dhule (BDTCL) S/C Charged on 12

th June 2015.

2 765 kV Bhopal- Jabalpur Charged on 8th June 2015. 3 765kV Bhopal - Jabalpur Charged on 8th June 2015. 4 400 KV Dhule (BD)-Dhule (MS) Dec – 2015 Bay completed. SCADA Erection in progress

The Sub-Committee noted as above. 7.3 Commissioning of new Generating units in Western Region and the

capacity expected to be commissioned during the current year 2015-16. The status regarding Generating units, commissioned /expected to be commissioned during the current year 2015-16 according the available information is as below:

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Name of the Power Projects Unit No. Capacity (MW)

Date of Commissioning /Schedule Date

GUJARAT SIKKA TPS EXT 3 250 COD-17.09.2015

SIKKA TPS EXT 4 250 Dec-15, First time Synch done

CHHATTISGARH Marwa 1 500 Dec 2015 2 500 Dec 2015 MAHARASHTRA CHANDRAPUR 8 500 Oct-15 CHANDRAPUR 9 500 Feb- 2016 KORADI 8 660 Oct-15 COD Expected KORADI 9 660 Jan- 2016 KORADI 10 660 March -2016

PARLI 8 250 Jan - 2016 (Subject to availability of Water)

MADHYA PRADESH M/s Jhabua Power, Seoni 1 600 December – 2015 Moser Bear (Hindustan power) 2 600 December 2015 Essar Power MP Ltd(Mahan) 2 600 December 2015 CENTRAL SECTOR/IPP VINDYACHAL 13 500 OCT -2015 KSK 3 600 March – 2016 KSK 4 600 June – 2016 SASAN 6 600 COD on 27.03.2015

ACBIL(Maruti) 1 300 Commissioned on 17.04.2015

RKM 1 360 Oct -2015 RKM 2 360 Dec 2015 RKM 3 360 Dec 2015

RKM 4 360 MARCH 2016 BALCO 1 300 COD on 11.07.2015

Sub-committee noted as above.

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ITEM NO. 8: MISCELLANEOUS OPERATIONAL ITEMS ITEM NO. 8.1: QUARTERLY REVIEW OF CRISIS MANAGEMENT PLAN

SE(O), WRPC requested all the constituents to submit the CMP report for the

second quarter (July 2015 to September 2015) for the year 2015-16.

The Sub-Committee noted as above and agreed to furnish the same. ITEM NO. 8.2: STATUS OF PHYSICAL & CYBER SECURITY IN POWER SECTOR SE(O), WRPC requested all the constituents to submit the status of physical & cyber

security in Power Sector for the second quarter (July 2015 to September 2015) for the

year 2015-16.

The Sub-Committee noted as above and agreed to furnish the same. ITEM NO. 8.3: READINESS OF SLDC AT GOA, OTHER SLDCs AND WRLDC FOR UPGRADATION OF EXISTING SCADA/EMS SYSTEM

During 29th WRPC meeting it was decided that the status of progress of SLDCs &

Back-up SLDCs of WR constituents/WRLDC would be regularly monitored in monthly

OCC meeting. The present status of progress of SLDC’s & Back-up SLDC’s of WR

constituents /WRLDC attached at Annexure – 8.3. The Sub-Committee noted as above. ITEM NO. 8.4 GENERATION TARGET/LGBR PREPARATION FOR THE YEAR 2016-17 IN WESTERN REGION.

A. Electricity Generation Target for the year 2016-17: Chief Engineer(OPM), CEA, New Delhi intimated vide letter dated 29.09.2015(copy

enclosed at annexure-8.4A) that generation target for the year 2016-17 to be fixed up by

MoP in consultation with CEA. The exercise is already stated by CEA. Therefore all the

utilities are requested to send the necessary information/data in attached format latest

by 31st October 2015 via mail: [email protected], [email protected] & also

send the copy of the same to WRPC(email : [email protected] ).

The sub-committee discussed the matter & utilities requested for tentative outages program from central sector generators & UMPPs. Accordingly WRPC

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wrote a letter to NTPC, NPCIL & UMPPs for submission of tentative unit outage plan for the year 2016-17. Members from generating companies expressed that annexure in which data to be submitted were very exhaustive and officers of operation division should be available for clarification and finalization of data. MS,WRPC informed that he would take on with Chief Engineer OPM,CEA to depute Engineer for two days at WRPC and generating companies can finalise data with them.

B. LGBR PREPARATION FOR THE YEAR 2016-17 IN WESTERN REGION:

As per the Regulation 5.7.4 of Central Electricity Regulatory Commission (Indian Electricity Grid Code)(First Amendment) Regulations, 2011(reproduced below for reference) Quote “(c) RPCs Secretariat shall compile load Generation Balance Report for peak as well as off peak scenario and also prepare annual outage plan for transmission elements and major generating stations in the region. RPCs Secretariats shall then come out with the draft outage programme for the next financial year by 30th November of each year for regional grid taking in to account the available resources in the optimum manner and to maintain security standards. This will be done after carrying out necessary system studies and, if necessary, the outage programmes shall be rescheduled. Adequate balance between generation and load requirement shall be ensured while finalizing outage programme. The same shall be uploaded by the RPCs on their website.” Unquote Accordingly WRPC shall prepare Load Generation Balance Report for the year 2016-

17 in respect of Western Region. A meeting is proposed to be held on during last

week of November-15 at WRPC wherein constituents are requested to attend the

same with following data:

1. Generating Units proposed annual Maintenance programme in respect of your

system(also under your control area) for the year April 2016- March 2017.

2. Annual Maintenance programme in respect of transmission elements in your

system for the year April 2016- March 2017.

3. Monthwise restricted and unrestricted requirement of power (MW) and energy

(GWH) for the year April 2016- March 2017.

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4. Monthwise minimum requirement of power (MW) for the year April 2016-

March 2017.

5. Projected monthwise, unitwise generation of power (MW) corresponding energy

(GWH) as furnished in Generation Target for the above period.

6. Commissioning dates of new generating units during the year April 2015-

March 2015.

7. Expected dates of commissioning of new generating units likely to be

commissioned during the year April 2016- March 2017.

8. Month wise detail of proposed / tied-up bilateral agreements / Short term open

access sought for availing assistance from other agencies during the above

period.

9. Expected RES energy(MUs) & corresponding demand(MW) for the year April

2016- March 2017.

Member Secretary, WRPC suggested that utilities should be very careful in submitting

data, any major deviation from last year or drastic changes should be explained to

satisfy the querries raised by GM division, CEA at later stage.

The Sub-Committee noted as above. ITEM NO. 8.5 LILO OF 220 KV RAIGARH-BUDIPADAR LINE AT LOCATION NO. 9 TO 400/220 KV PGCIL SUBSTATION:- CE, SLDC Chhattisgarh informed that as per the Study Committee of WR,s

recommendation, the LILO of 220 KV Raigarh-Budhipadar line at 400/220 KV PGCIL

Substation Raigarh has been completed two months back and to save theft incidence

the LILO portion from PGCIL s/s to point of LILO has been idle charged from

11.08.2015. Vide letter no.951 dated 24.08.2015 GM (WRLDC) has requested to take

up this matter with ERLDC and Orissa State. The letter of DGM, Raigarh PGCIL

regarding their readiness for charging the LILO section from Raigarh PGCIL to 220 KV

Budhipadar has also been received, which is enclosed as annexure-8.5. Since the

matter of charging of above line is pending since 2 months it is requested by WRLDC

to obtain the readiness of ERLDC & Orissa state so that the arrangement for final

charging may be done.

GM, WRLDC explained that the LILO of 220 kV Budhipadar-Raigarh(CSPTCL) line

has now been done at 400/220 kV Raigarh_PG. Charging of this 220 kV Budhipadar-

Raigarh_PG would be a third inter-regional link between Budhipadar to Korba (E).

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CE, SLDC Chhattishgarh informed that the matter was taken up by GM, WRLDC with

GM, ERLDC and ERPC, but the matter has been still unresolved. He requested OCC

to write letter from Member Secretary, WRPC to Member Secretary, ERPC for

expedite the charging.

AGM, PGCIL requested for Installation of PLCC at both ends. He further informed that

metering arrangements are already commissioned.

Member Secretary, WRPC stated that the he would take up with ERPC to expedite the

energization of the above link after getting the complete technical details & supporting

documents/formalities from CSPTCL & PGCIL, which are needed for charging of

above line.

The Sub-Committee noted as above. ITEM NO. 8.6 SUPPLY OF COMMUNICATION EQUIPMENTS FOR BACK UP SLDC AT KHEDAMARA, BHILAI:- CE, SLDC Chhattisgarh informed that in the 16th PRM of EMS/SCADA on 06.07.2015

at WRLDC, the issue of supply of communication equipment and DCPS for Back up

SLDC at Bhilai was discussed. The representative of PGCIL has promised to explore

the possibility of diverting the equipments from any other project but till date SLDC,

Raipur has not received any suitable reply from M/s PGCIL authorities despite many

telephonic persuasions. The work in the scope of CSPTCL is likely to be completed

by the end of October 2015 but due to non-availability of communication equipments

and DCPS the commissioning of Back up SLDC at Bhilai will be delayed. PGCIL is

requested to look into the matter and arrange to provide the equipments on top most

priority so that the commissioning of Back up SLDC at BHILAI is not delayed.

Representative from PGCIL Nagpur informed that PGCIL is considering diverting

communication equipments from Padghe, Maharashtra to back up SLDC Bhilai.

The Sub-Committee noted as above. ITEM NO. 8.7: SWITCHING OPERATION PERFORMED AT 765 KV VADODARA (PG) SUBSTATION WITHOUT INTIMATION TO SLDC GUJARAT CE, SLDC Gujarat, informed that recently on 29.09.15 Hrs, 765 KV bus - 1 and 765

KV S/C Vadodara (PG) - Dhule line tripped. Subsequently, 765 KV Bus - 1 outage was

availed; but, WRLDC did not convey the information regarding event and concurrence

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of emergency outage to SLDC-Gujarat. Similarly, an emergency outage of 765 KV S/C

Vadodara (PG) – Dhule line has been facilitated on 03/10/2015 for whole day without

informing SLDC-Gujarat.

It is utmost necessary that the information of such important outage should be

communicated to respective SLDCs prior to permitting the code for switching

operation for secure and reliable grid operation. Also, outage availing entity shall give

information of such outage to respective State SLDC and also arrange to convey the

operation code (issued by WRLDC) through/to respective SLDCs.

GM, WRLDC ensured that any important element outages/charging will be informed to

the respective SLDCs before issuing outage code.

Member Secretary, WRPC suggested that any important elements outages code in

respective state issued by WRLDC shall also informed to the respective SLDCs.

The Sub-Committee noted as above. ITEM NO. 9: WRLDC ITEMS 1. N-1 ADEQUACY OF 765/400 KV ICT AT 765 KV AKOLA (2) AND 765 KV

TIRODA

WRLDC informed that as per CEA Manual on Transmission Planning criteria and

IEGC 3.5 (a) ISTS shall be capable of withstanding and be secured against outage of

single interconnecting transformer. Currently there is only one 1500 MVA, 765/400 kV

ICT at 765 kV Akola2 and 765 kV Tiroda substations in Maharashtra system. Thus

the system is N-1 non-compliant at 765 kV Tiroda and 765 kV Akola2.

SLDC Kalwa / MSETCL may oversee and expedite commissioning of additional ICTs

at Tiroda and Akola2 to ensure N-1 compliance.

It was decided that APTL and MEGPTCL would install one more 1500 MVA, 765/400

kV ICTs at Tiroda and Akola(2) respectively in line with CEA transmission planning

criteria.

CE SLDC informed STU regarding n-1 non compliance of the system at these two

substations. He requested MEGPTCL to take immediate needful action to provide

second ICT at 765/400KV Akola2 and 765KV Tiroda substation along with necessary

amendments in transmission licensee vide letter MSETCL/CO/STU/302B/GC

/201/4030 dt. 24.03.2015. Further he requested MEGPTCL, to take immediate

needful action to provide second ICT at 765/400KV Akola2 and 765KV Tiroda

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substation and the current progress on second ICT at 765KV Akola2 and 765KV

Tiroda substation vide letter CELDK/SO/TECH/1006 DT. 02.06.2015

Representative MEGPTCL informed CE STU vide letter MEGPTCL/MSETCL

/01072015/112 dt 01.07.2015, Installation of ICT along with associated bays is

feasible at both substation, and the process of amendments in MEGPTCL

transmission license for inclusion of ICTs at Tiroda and Akola 2 substation will be take up.

MEGPTCL filed the petition with MERC for amendment in transmission license. After

approval of such amendment from MERC, the process of installation of ICTs will be

initiated by MEGPTCL.

Member Secretary, WRPC suggested that approval of SCM of WR may not be

required and thus MEGPTCL and APTL may please expedite modification in

transmission license and act accordingly.

The Sub-Committee noted as above. 2. ADEQUACY OF SHUNT CAPACITIVE COMPENSATION AT INDORE/UJJAIN

AREA

WRLDC informed that in 465th OCCM held in Nov 2014, SLDC Madhya Pradesh

reported that low voltages in the range of 395 kV are observed at Indore (MP)

substation in morning hours (5:00-10:00 Hrs) due to agricultural loads. Accordingly

measures were initiated by WRLDC to switch off bus reactors at 765/400 kV Indore

(PG) and 400 kV Itarsi substations during morning hours.

The load in Madhya Pradesh is anticipated to be at its peak during the Rabi season.

Hence in order to maintain good voltage profile at Indore and nearby areas, SLDC

Madhya Pradesh may ensure adequacy and healthiness of capacitor banks nearby

Indore area. As per the WRLDC records capacitor banks nearby Indore area is as

follows:-

Substation (Having Capacitors) MVAR Capacity

132 kV Indore South Zone 1x10

132 kV Nagda 1x10

132 kV Shujalpur 1x50

132 kV Indore STG2 1x10

220 kV Indore 2x25

Total 130

17

476th OCC MINUTES

Representative from WRLDC stated that Indore area is vulnerable to dip in voltage

during morning peak hours during Rabi season inspite of switching of bus reactors at

Indore and Itarsi substations.

MPPTCL was requested to ensure healthiness of capacitor banks around Indore area

for improving voltage profile. MPPTCL was also requested to expedite restoration of

400/220 kV ICT-1 at Indore as well as ICT-3 and ICT-1 at Bina_MPPTCL for

improving reliability of power supply to Madhya Pradesh during Rabi season as well

as during the Simhast Kumbh scheduled in Ujjain April 2016.

SLDC MP informed the status of Shunt Capacitors as under: Capacitor Size MVAr 1 220 kV South Zone

Indore 33 kV 3x12+1x10.5 46.5

132 kV 2x33 66 2 220 kV Sujalpur 33 kV 1x24 24 132 kV 2x33 66 3 132 kV Sujalpur 33 kV 1x24+1x5 29 4 132 kV Jaitpura (Indore) 33 kV 1x12 12 132 kV 2x25 50 5 220 kV Indore East

100 MVA 220/33 kV Xmer33 kV 1x24 24

6 220 kV Nagda 33 kV 2x5+2x12 34 132 kV 2x33 66 7 132 kV Ratidiya 36 kV 2x12 24 8 132 kV Ujjain 36 kV 2x12 24 33 kV 2x5 10 9 132 kV Bherugarh 36 kV 1x12

The Sub-Committee noted as above. 3. UNDER VOLTAGE LOAD SHEDDING SCHEME (UVLS) IN WESTERN REGION

WRLDC informed that the need for UVLS for system security was recognized and

discussed during last several OCC meetings. In the 475th OCC meeting WRLDC had

suggested that as per the CEA Planning Criteria the emergency rating for minimum

voltage is 119 kV for 132 kV system; 194 kV for 220 kV system and 372 kV for 400 kV

system. SLDC Maharashtra stated that in Maharashtra the under voltage relay was

being set at 365 kV with 5 sec delay for 400 kV S/S. Similarly Gujarat SLDC stated

18

476th OCC MINUTES

that in Gujarat the under voltage relay was being set at 185 kV with 5 sec delay for

220kV S/s.

Representative from WRLDC explained that the UVLS scheme is different from the

routine voltage control measures through reactive power management. The UVLS

should act only to protect the system from voltage collapse in case of major

contingencies such as one that occurred in Bableshwar.

CE, SLDC Maharastra has selected five low voltage pockets for the implementation of

UVLS Scheme ,i.e. Aurangabad, Solapur(Lamboti), Lonikand, Bableshwar and

Padgha. Now Due to commissioning of 765KV Aurangabd (PG)- Solapur(PG) ckt I

and II,on dt 30.09.15 , the voltage profile at Aurangabad and Solapur region is

improved. Now It is decided to implement the UVLS scheme at 3 low voltage pockets

i.e Lonikand , Bableshwar and Padgha region only.

The matter was discussed in Standing protection committee meeting of MSETCL and

principally agreed to implement the scheme. the preliminary requirement of relays etc

was chalked out procurement of which may take appx. two months time. The details

settings and other matter will be discussed in Standing protection committee meeting

which is scheduled on 27.10.15.the scheme is likely to be completed within 2-3

months period.

Representative from Gujarat SLDC has stated that Under Voltage load shedding

scheme is being implemented.

Member Secretary, WRPC suggested that the emergency voltage levels mentioned in

the CEA Planning Criteria could be considered for setting the UVLS relays.


4. CONSTRAINTS IN GRID OPERATION DUE TO NON-AVAILABILITY OF TELEMETRY FROM MSETCL / MAHAGENCO STATIONS

WRLDC informed that non-availability of telemetry from large number of EHV stations

of MSETCL and Mahagenco has been flagged by WRLDC and is being deliberated in

the OCC forum since December 2013 (22 Months). In last OCC meeting MSETCL

informed that data from six substations (two 400 kV and four 220 kV substations) are

expected to be integrated by 30th Sept 2015. However the present status of telemetry

in Maharashtra is tabulated below:

19

476th OCC MINUTES

Number of stations whose

telemetry should be

available at WRLDC


telemetry is not

integrated in WR-SCADA


telemetry is intermittent / unreliable

% observability of stations

under jurisdiction of Maharashtra STU/SLDC at WRLDC

A B C (A – (B+ C)/A Generating Stations 32 0 4 87.5% 765/400 kV Transmission Substations

17 4 4 52.94%

220 kV Transmission substations

178 19 49 61.7%

Total 227 23 57 64.75% It may be seen that there are 23 stations like 400 kV Warora, Chandrapur2, Lonikhand

and Taptithanda where the integration of database is pending, even several months

after commissioning of the substations and there are nearly 57 stations where

database integration is completed but telemetry from these station is highly

intermittent due to continuous failure of communication link. The telemetry status is

also being submitted to CERC and uploaded on our website as per the directions of

the Hon’ble CERC in the petition number 194/MP/2011 & IA 44/2012. In the absence

of telemetry from these stations, severe constraints are being experienced by WRLDC

control room personnel in real-time supervision and operation of the grid.

Representative from WRLDC explained the constraints faced in grid operation due to

poor telemetry from MSETCL/MahaGenco stations.

CE, SLDC, Maharashtra informed that the Telemetry link for 107 nos of major

substations and generating stations is already established. The Telemetry link for 400KV Koradi II and 400 KV Deepnagar S/st is recently

established MSETCL have already placed an order for installation of VSAT links at following locations:-

1. 400 KV Warora 2. 400 KV Taptitanda 3. 220 KV Ghatghar 4. 220 KV Paras 5. 220 KV Parli Old 6. 220 KV Parli New.

20

476th OCC MINUTES

The Chief Engineer Trans( O & M) informed vide letter MSETCL/CO/Trans/O&M/SE-

Tel/13108 dt 12.10.15 that the installation of VSAT at six locations was delayed as the

equipment could not be delivered due to transportation union strike. The equipments

have now been delivered at the sites. The installation work is completed and

commissioning work is in progress. and will completed by nov 2015.

The Sub-Committee noted as above. 5. MOCK BLACK START EXERCISE IN WESTERN REGION

WRLDC informed that as mandated by IEGC, the Black start capable units need to

conduct mock black start exercises once in every 6 months. Western Region has 29 generating stations with black start capability. As per the information available with

WRLDC only 5 Black Start stations have completed the Mock exercise in the year 2015.

Sl.No Generating station

Date of mock drill exercise completed in 1st six months

Date of mock drill exercise completed

in 2nd six months

1 Kadana, Gujarat 19th Feb 2015 -

2 CLPIPL, Gujarat 6th March 2015 -

3 Hasdeo Bango, Chhatisgarh

17th May 2015 -

4 Khopoli Hydro, Maharashtra

23rd August 2015

NCA and SLDC Gujarat had intimated that the mockdrill of RBPH units was being planned in October. A meeting of all stakeholders was scheduled on 30th September 2015 to finalize the procedure. As per last OCC minutes the schedule for mock drill in Madhya Pradesh stations is as follows.

PROPOSED DATE FOR BLACK START MOCK DRILL OF HYDEL POWER STATIONS OF MADHYAPRADESH

Sl. No. Name of Power Station Date of Mock Drill 1 Birsingpur Governor Problem 2 Indira Sagar Project 17th Nov 2015 3 Bargi 12th Oct 2015

21

476th OCC MINUTES

4 Pench 6th Nov 2015 5 Tons 6th Oct 2015 6 Rajghat Governor Problem 7 Madhikheda Governor Problem 8 Gandhi Sagar 27th Nov 2015

Representative from WRLDC informed that only 6 black start stations out of 29

stations, have completed their mock exercise in this calendar year. Concern utilities

were requested to complete mock exercise at the earliest.

EE, SLDC MPPTCL informed that mock exercise of Tons and Bergi hydro plant were

successfully completed on 8-Oct-15 and 12-Oct-15 respectively. Other three MP hydro

plant mock exercise would be completed as per the schedule.

Member Secretary, WRPC asked M.P. to forward the report of mock exercise to

WRPC and WRLDC.

CE, SLDC Gujarat stated that the mock exercise of SSP along with auxiliary load of

WTPS has been planned and would be completed by Nov 2015.

SE(O) MSETCL

intimated the Tentative

Schedule for the mock drill

in Maharashtra

stations is as follows:-

The Sub-Committee noted as above. 6. LOAD FORECASTING IN WESTERN REGION

During the 475th OCC meeting it was decided that all the SLDCs would forward the day ahead load forecast to WRLDC along with the day-ahead requisition sheet submitted at 1500 hrs everyday. Load forecasts are being received at WRLDC from SLDC Gujarat, Maharashtra and Madhya Pradesh. SLDC Chhattisgarh, Goa, DD, DNH and ESIL shall coordinate to submit the day-ahead load forecasts to WRLDC on daily basis. Representative from WRLDC showed the typical demand forecast submitted by SLDC Madhya Pradesh, Chhattisgarh, Maharashtra and Gujarat.

Sr .NO. Name of Power Station Date of Mock Drill

1 GTPS Uran 3 Nov. 2015

2 Ghatghar Hydro Station 6 Nov.2015

3 Koyna Hydro Station 23 Nov.2015

22

476th OCC MINUTES

ESIL, GOA, DD and DNH were advised to submit the day ahead load forecast to WRLDC at 1500 hrs on daily basis for computation of load forecast for Western Region. The Sub-Committee noted as above. SUPPLEMENTARY AGENDA : SA-1- INSTALLATION OF SPS IN 400/220KV, 315 MVA ICT 1&2 AT 765/400KV SATNA SS: DGM, PGCIL informed that at Satna, two nos. 400/220kV 315 MVA ICTs are in

service. The loading on these ICTs has found more than 250 MW on each ICT in

most of the time and some time it was noticed touching to 325 MW on each ICT. It

was observed that in event of tripping of any one ICT, the loading on second ICT

crosses 450-500 MW resulting tripping of second ICT also.

EE, SLDC, MP Jabalpur has intimated that SPS has already been in service in 220/132kV ICTs at 220kV Satna SS (MP) to control the overloading of 220/132kV

ICTs by tripping 132kV lines. He further intimated that one circuit of 220kV Satna

(PG)-Katni (MP) line is being made LILO at 220kV Satna (MP) SS shortly which will

help in reducing the loading on ICTs at Satna, Powergrid.

Member Secretary, WRPC requested SLDC, MP shall furnish the details of SPS

installed with its settings to WRPC, WRLDC & POWERGRID for review.


SA-2- REQUIREMENT OF SPS FOR 220KV VAPI –KARADPADA D/C LINES:

DGM, PGCIL informed that this is issues has been discussed during last OCC

meetings but till date the SPS has not been installed. The loading on 220kV Vapi-

Karadpada D/C lines is around 150-200 MW in each circuit. It is observed that in

event of tripping of any one circuit of these, the loading on remaining circuit crosses

250 MW resulting in melting of jumpers, clamps/connectors etc., Hence, SPS for load

shedding is required in the event of tripping of any one circuit of 220kV Vapi –

Karapdada D/C lines.

23

476th OCC MINUTES

Member Secretary, WRPC advised to POWERGRID and GETCO arrange a meeting

with Electricity Dept. DNH, at Silvassa to expedite commissioning of SPS and to

identify the feeders for load shedding etc.


SA-3- 765KV GIS RELATED ISSUES:

DGM, WRLDC informed that 765kV GIS is new technology in India as well as world

and needs stabilization period of about six month to address the problems among in

the GIS system. 765kV Vadodara GIS has been commissioned in WRTS-II in June

2015. Serious problems occurred in Sept 2015 on 765kV side of GIS. As the

technology is new and understanding the problems is taking time, it is proposed that

Stability period of GIS station may be considered for six months from the date of

DOCO so that any defects seen may be rectified and system is put into stable and

reliable operation.

Member Secretary, WRPC stated that PGCIL shall submit the complete details of

outages of GIS S/S. After detailed study the outages period for availability would be

considered as a special case on case to case basis.


ANY OTHER ITEMS

SA-4 REDUCTION IN GAS PRICE FOR NTPC STATIONS:

GM(OS & Commercial) NTPC, informed that as per circular issued by GOI vide :

PPAC/Gas Pricing/Oct 15-March 16, dt 30-09-15, the price of Domestic Gas from 1st’

Oct 2015 to 31st’ Mar 2016 is $ 3.82 per MMBTU on GCV basis. With this gas price,

Tentative Variable cost of Kawas & Jhanor from 01.10.15 would be as under.

Kawas : 2.66(APM) / 2.93(NAPM) Rs/Kwh

Jhanor : 2.54(APM) / 2.84(NAPM) rs/Kwh

He also thanked representative of Gujarat, Maharashtra and MP for Scheduling the

power from Jhanor. He further requested representatives of all the beneficiaries to

continue giving requisition for scheduling from Jhanor to avoid Take or Pay clause by

GAIL for GGF Gas.


24

476th OCC MINUTES

ITEM NO. 10: DATE AND VENUE OF NEXT OCC MEETING 476th OCC reviewed the meeting roaster and finalized sheet is enclosed at Annexure-

10. As per roster 477th OCC meeting will be hosted by NTPC, Sipat on 09.11.2015 at

Sipat in the month of November 2015. Further 478th OCC meeting would be hosted by

TAPS 3 & 4 in the month of December 2015.


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

Sr. No. Name of the Official Designation Organisation Mobile No. Email

1 Shri.S D Taksande, Member Secretary WRPC 9820878384 [email protected]

2 Sh P. Mukhopadhyay GM WRLDC 9869438073 [email protected]

3 Sh V. K. Gupta SE, WRPC WRPC 9960792316 [email protected]

4 Sh L.K.S.Rathore Dy Director - Operations WRPC 9833371844 [email protected]

5 Sh R. K. Yadav Asst Director - Operations WRPC 8903929150

6 Sh Vivek Pandey CM WRLDC

7 Sh Abhishek Gupta MANAGER WRLDC 9869404650

8 Dr. Sanjay Kulkarni CE SLDC, Maharashtra 9819363329 [email protected]

9 Sh D. K. Rokade SE SLDC, Maharashtra 9167831551 [email protected]

10 Sh Kale SE ALDC, Ambazhari

11 Sh B. B. Mehta CE SLDC, Gujarat 9879200736 [email protected]

12 Sh G. J. Mistry DE SLDC, Gujarat 9925213180 [email protected]

13 Sh W, R. Wankhede CE SLDC, Chattisgarh 9425562412 [email protected]

14 Sh Y. Krishna Rao EE SLDC, Chattisgarh 9826518820 [email protected]

15 Sh P. B. Behere GM (OS & Commercial) NTPC 9004497088 [email protected]

16 Sh P.P. Chatterjee Manager (OS) NTPC [email protected]

17 Sh M. L. Patra AGM, EEMG NTPC, Sipat 9425281282 [email protected]

18 Sh Kuleshwar Sahu AGM PGCIL 9425294214 [email protected]

19 Sh D. Bruhananda Chief Manager Powergrid-WRTS-2 9428504279 [email protected]

20 Sh P. R. Gadave Head - Grid Operations Tata Power 9223553341 [email protected]

21 Sh Binod Sahoo GM - Electrical Jindal Power Ltd, Tamnar 7898902620 [email protected]

22 Sh Abhinava Yadava Asst Mgr - Elect Athena Chattisgarh Power Ltd 7566370850 [email protected]

23 Sh K Satish Kumar Sr Engineer Athena Chattisgarh Power Ltd 8358085129 [email protected]

ATTENDANCE SHEET ANNEXURE‐

PAGE NO.: 1

Sr. No. Name of the Official Designation Organisation Mobile No. Email

ATTENDANCE SHEET ANNEXURE‐

24 Sh Sanjay Mehta EE MPPTCL, Jabalpur 9425805017 [email protected]

25 Sh Sanjeev Gadre Operation Suptd Tarapur Power Atomic Station 9423982777 / 08007982777 [email protected],[email protected]

26 Sh K G Patel GSECL, Baroda 9925210977 [email protected],

27 Sh Mukti Nath Singh GM /Head Operation- O&M MB Power (MP) Limited 7773011748 [email protected]

28 Sh A.A. Shevale EE Mahagenco 9167493956 [email protected]

29 Sh Jaysinh Jadeja GM - Operation Sasan Power Limited 9827856545 [email protected]

30 Sh Ferryl C Fernandes Manager Torrent Power Limited 9558832169 / 7096042710 [email protected]

31 Sh Ramakant Upadhyay DM KSK Mahanadi Power Company Limited 7869916080 [email protected]

32 Sh Umesh Likhite Group Head - Operations Coastal Gujarat Power Ltd. 9227295452 [email protected]

33 Anil Darode Mgr (AM) Powergrid - WRTS - 1 9422307805 [email protected]

34 Nilesh Goudiya JE Powergrid - WRTS - 1 9890702982 [email protected]

35 Sh T. Rajeshkumar Manager RKM Power gen Pvt Ltd 8435000779 / 7598030173 [email protected]

36 Sh Khirod Kumar Barik AGM Balco 9893566551 [email protected]

37 Sh Atul Darhe SE(G) Kakrapar Atomic Power Station 9428821921 [email protected]

38 Sh Rajasekhar Chilukuri Manager(Electrical) Sterlite Technologies Limited 8308842488 [email protected]

39 Sh Sanjay Kumar Shrivastava AGM (OS) NTPC 9425178069 [email protected]

40 Sh O.J. Saxena Sr. Manager Essar Steel India Limited 9879101268 [email protected]

41 Satish Dukare General Manager (Coordination) Dhariwal Infrastructure Ltd. 9561112003 [email protected]

42 Biplab Kar Dhariwal Infrastructure Ltd. 9561112003 [email protected]

43 SHRI JAIDEV NANDA COO ADANI POWER

44 C P SHAHOO PLANT HEAD TIRODA APML ADANI TIRODA

45 Akshya Mathur G M ADANI POWER [email protected] Shri Manoj Taunk AGM ADANI POWER [email protected]

PAGE NO.: 2

14-Oct-15

1

Power System Operation Corporation Ltd.(A wholly owned subsidiary of Power Grid Corporation of India Ltd.)

WRLDC POSOCO

at Tiroda

14th October, 2015

Grid Operation Highlights

476th OCC Meeting

Maximum: 1033 MU on 9th Sept 2015.

Minimum: 822 MU on 20th Sept 2015 (Sunday

and Heavy rain)

WRLDC -POSOCO

Energy

Consumption

MU/Day

Sep-15 Aug-15 Sep-14% Change w.r.t last

month

% Change w.r.t last

Year

Average 965 908 863 6.36 12 %Max 1033 995 1028 3.81 0.5 %

Date 9-Sep-15 27-Aug-15 29-Sep-14 ~ ~

Highest till date –

1077 MU on 10th Oct 20150.5% increase as compared to

last year

14-Oct-15

2

� Max: 45447 MW on 29th Sept’15 at 15:00 hrs.

0.81% increment compared to last year.

� Min: 31485 MW(21st Sept’15, 03:00 hrs)

� 12 % increase in Average(hourly) Demand compared

to last year.

WRLDC -POSOCO

47071 MWHighest ever on 10th Oct at

16:00 hrs (so far highest)

Demand Met Sep-15 Aug-15 Sep-14% Change w.r.t

last month

% Change

w.r.t last Year

Average 40226 37819 35947 6.36 11.90

Max 45447 43754 45081 3.87 0.81

Date when Max. 29-Sep-15 27-Aug-15 29-Sep-14 ~ ~

Max

Above

46 GW

Min

Above

40 MW

14-Oct-15

3

WRLDC -POSOCO

Highest ever

WRLDC -POSOCO

14-Oct-15

4

WRLDC -POSOCO

Max 50.33 Hz(on 20th Sept at 16:06 hrs )

Min 49.52 Hz (on 3rd Sept at 19:13 hrs) –OD by Gujarat, Maharashtra

Uttar Pradesh, Tamil Nadu, Karnataka, Andhra Pradesh, West

Bengal

Months 50.05 FVI

April'15 14.93 60.20 24.86 0.08

May'15 15.82 64.74 19.44 0.08

June'15 9.29 65.01 25.70 0.07

July'15 10.64 70.29 19.07 0.06

Aug'15 15.03 70.00 14.97 0.06

Sept'15 29.4 59.8 10.8 0.11Average 49.95 Hz

Demand rise triggered by Dry Spell

WRLDC -POSOCO

Excursions

Below

49.7 Hz

14-Oct-15

5

WRLDC -POSOCO

• Frequency was less than 49.9Hz for more than 40% of time in the first

fortnight of the month due to dry spell and rise in all India demand.

Date 50.051-Sep 50.45 47.29 2.26

2-Sep 41.96 52.93 5.11

3-Sep 55.07 43.47 1.46

4-Sep 61.67 35.23 3.10

5-Sep 45.84 51.61 2.55

6-Sep 24.77 67.13 8.10

7-Sep 47.42 50.19 2.39

8-Sep 45.14 50.22 4.64

9-Sep 43.51 50.59 5.90

10-Sep 26.77 65.24 7.99

11-Sep 22.67 68.83 8.50

12-Sep 40.63 55.83 3.54

13-Sep 14.29 73.51 12.20

14-Sep 41.39 54.11 4.50

15-Sep 27.50 66.60 5.90

16-Sep 32.25 62.66 5.09

17-Sep 5.13 57.64 37.23

18-Sep 14.73 71.68 13.59

19-Sep 25.38 63.37 11.25

20-Sep 2.14 60.30 37.56

21-Sep 7.42 67.16 25.42

22-Sep 6.97 68.19 24.84

23-Sep 10.10 66.56 23.34

24-Sep 16.25 66.44 17.31

25-Sep 28.04 61.90 10.06

26-Sep 38.89 55.51 5.60

27-Sep 10.75 72.35 16.90

28-Sep 22.29 71.53 6.18

29-Sep 39.03 56.50 4.47

30-Sep 33.19 60.28 6.53

Max 61.67 73.51 37.56

Average 29.39 59.83 10.78

Wind Generation

ConstituentInstalled Capacity

(MW) Max Gen(MW) Date/ Time of Max Gen

Energy

Generation(MU) CUF(%)

Gujarat 3581 1491 30th Sept 2015 at 08:00 330 12.80

Maharashtra 4369 1926 19th Sept 2015 at 03:00 363 11.53

Madhya

Pradesh901 432 18th Sept 2015 at 08:00 93 14.40

WR 8851 3190 19th Sept 2015 at 03:00 786 12.34

Solar Generation

ConstituentInstalled Capacity

(MW) Max Gen(MW) Date/ Time of Max Gen

Energy

Generation(MU) CUF(%)

Gujarat 974 737 28th Sept 2015 at 13:00 129 18.46

Maharashtra 341 206 27th Sept 2015 at 12:00 31 12.75

Madhya

Pradesh572 558 7th Sept 2015 at 12:00 94 22.77

WR 1887 1392 27th Sept 2015 at 13:00 255 18.74

Generation from RES in WR during Sept-15

14-Oct-15

6

Average

8.48

MU/day

Regional Solar generation 27th Sep 2015

Addition of New Elements Addition of New Elements Addition of New Elements Addition of New Elements –––– Sept’15Sept’15Sept’15Sept’15

Total Capacity added in 2015-16 (upto Sept’15) – 1400 MWGENERATING UNITS: NIL in September

WRLDC -POSOCO

S No Name of the Generator Agency Capacity

1 Vindhyachal -13 NTPC 500

2 Koradi-U-8 MAHAGENCo 660

3 Chandrapur-8 MAHAGENCo 500

4 GMR Chhattisgarh U-2 GMR Chhattisgarh 685

5 Balco- U-3 BALCO 300

6 TRN U-1 TRN Energy Pvt. Ltd. 300

7 Jhabua-U-1 Jhabua Power Ltd. 600

3545

Expected Generation Addition

14-Oct-15

7

SL.NO. CONSTITUENT STATION NAME KV CAPACITY

(MVAR)DATE

1 Power Grid Vadodara GIS 765 240 29.09.15

BUS REACTORS

LINE REACTORS

WRLDC -POSOCO

SL.NO. CONSTITUENT STATION NAME Line Name KV CAPACITY

(MVAR)DATE

1 JTCL Dharamjaigadh Jabalpur Pooling- Dharamjaigadh - 3 765 330 09.09.15

2 JTCL Dharamjaigadh Jabalpur Pooling- Dharamjaigadh - 4 765 330 09.09.15

Addition of New Elements Addition of New Elements Addition of New Elements Addition of New Elements –––– Sept’15Sept’15Sept’15Sept’15

TRANSMISSION LINES

Total ckt Km added in 2015-16 (Upto Sept’15) – 4100 Ckt Km

WRLDC -POSOCO

SL.NO. CONSTITUENT LINE NAME CKT NO KV DATELine Length (in

Km)

1 JTCL Jabalpur Pooling-Dharamjaigarh III 765 12.09.15 384

2 JTCL Jabalpur Pooling-Dharamjaigarh IV 765 13.09.15 384

3 Powergrid Aurangabad-Solapur I 765 30.09.15 278

3 Powergrid Aurangabad-Solapur II 765 30.09.15 278

Total 1324

ICT addition: Nil

Ranchi/Jharsuguda – Dharamjaygarh-Jabalpur-Bina-Gwalior corridor

Evacuation of Sipat and other W3 generators augmented

Loading of 400 kV Korba-Sipat when Sipat generation is low

14-Oct-15

8

Aurangabad(PG)Aurangabad

(MS)

Pune(PG)

Pune

GIS

131

Sholapur

1054*2

139*2

400kV

765kV Wardha

Raichur

Maharashtra Drawl: 5500MW

HVDC Bhadrawati :1000MW

710*2

500*2

204*2

250*2

792*3

Parli(PG)

Durg

Bhadrawati

Critically Loaded Tr lines

400 kV Parli(PG)-Solapur

400 kV Aurangabad-Waluj

400kV Wardha-Parli

400 kV Aurangabad-Pune

400 kV Bableshwar-Padghe

600*2

Before Synchronization of 765kV Aurangabad-Solapur-D/c

765kV Aurangabad-Solapur

400kV Parli-Solapur-D/c

400kV Wardha-Parli-D/c

300 MW

550 MW

1500 MW

14-Oct-15

9


400kV Aurangabad-

Waluj-D/c

400kV Waluj-Pune-D/c

525 MW

300 MW

1500 MW

Bhadravati-Parli

Bableshwar-Padghe

175 MW

150 MW


1500 MW

14-Oct-15

10

Lines Without A’bad-

Solapur

With A’bad-

Solapur Change

Sensitivity

A B C=B-A D= C / (Aurangabad-Solapur

Flow)

765kV Aurangabd-Solapur 0 1524 1524 + 100%

765kV Wardha-Aurangabad-Q/c 2373 3189 815 + 53%

400kV Parli-Solapur-D/c 1001 455 -546 -36%

400kV Aurangabad-Waluj-D/c 1989 1464 -525 -34%

765kV Pune-Solapur-S/c 131 -324 -455 -30%

400kV Wardha-Parli-D/c 1462 1154 -308 -20%

400kV Waluj-Pune-D/c 1162 870 -292 -19%

400kV Bableswar-Padghe-D/c 1069 895 -175 -11%

400kV Bhadrawati-Parli-D/c 787 633 -154 -10%

765kV Solpaur-Raichur-D/c 495 413 -82 -5%

400kV Parli-Pune-D/c 518 440 -78 -5%

400kV Akola-Tapthitantha-D/c 583 569 -14 -1%

Sensitivity of 765 Aurangabad-Solapur on other lines

� With 765KV Sholapur-Raichur D/C in service (from Sholapur to Raichur)

� Flow crossing 1500 MW and remains above this value for 2.5 sec

Changed to Flow crossing 2500MW and remains above this value for 5 sec

� With 765KV Sholapur- Raichur any one ckt in service (from Sholapur to Raichur )

�When flow on 765kV Sholapur-Raichur S/C line crosses 1000 MW and remains above this value for 2.5 sec.

Changed to

1500 MW and remains above this value for 2.5 seconds.

Interim SPS setting for 765KV Sholapur- Raichur D/C

TTC increased

530 MW

14-Oct-15

11

after 5-OCT-15TTC

ATC

TTC

ATC

2830 MW

2080 MW

2300 MW

1550 MW

1950 MW

2700 MW530 MW

S

NoName of the Applicant

LTA Granted w.e.f

01.08.2014 (MW)

Part LTA already

operationalized

Balance LTA

Operationalized wef

05.10.15

1 BALCO to TNEB 100 56 44

2 Jindal Power Ltd to TNEB 400 224 176

3KSK Mahanadi Power Ltd

to TNEB500 281 219

4DB Power Chattisgarh to

TNEB208 117 91

1208 678 530

LTA Operationalized on WR-SR Link

14-Oct-15

12

Steps to be taken by MSETCL for reliability

• In view of the expected increase in generation at Koradi-II (#8) and Chandrapur power stations following elements to be expedited by MSETCL

• Augmentation in transformation capacity at Bableshwar• Dhule-Dhule bays at MSETCL• 220 kV outlets from 765/400 kV Aurangabad PG• Augmentation of 220 kV outlets from 400/220 kV Pune PG• 125 MVAr Bus Reactor at Kolhapur• 125 MVAr Bus Reactor at Karad• 2x50 MVAr LR at Dhule (Khandwa line and SSP line)

• Following elements to be kept in service for N-1 contingency of Wardha-Aurangabad ckts

• 765 kV (charged at 400 kV) Akola2-Taptithanda D/C• 400 kV Taptithanda-Bableshwar D/C

Shift unloaded

400/220 kV ICT at

Warora to Bableshwar

Connection of

IB Nasik

Units at 220kV + gen

Telemetry of MSETCL

And MahaGenco stations

14-Oct-15

13

�With 765KV Gwalior-Agra D/C in service

� 1400MW to 1800MW each ckt

�With 765KV Gwalior-Agra any one ckt in service

� 1500MW to 2500MW with one ckt in service.

This change in SPS is implemented from 1545 Hrs on 09/09/2015.

Interim SPS setting at 765KV Gwalior-Agra D/C

SPS signal presently from Agra end

Healthiness of Gwalior end SPS equipment to be ensured by POWERGRID

TTC increased from

5600 MW to 7700 MW

Views/ Suggestions Invited

• Draft on Detailed Procedure for Ancillary Services Operations are available in WRLDC website on below Links

http://wrldc.com/docs/POSOCO_Draft_Detailed_Procedure_Ancillary_Services_Operations_29Sep2015_R1.pdf

http://wrldc.in/docs/POSOCO_Draft_Detailed_Procedure_Ancillary_Services_Operations_29Sep2015_R1.pdf

• Draft Procedure for implementation of Inter-State Renewable Energy framework are available in WRLDC website on below links

http://wrldc.com/docs/Comments_invited_on_Draft_Procedure_for_implementation_of_Inter-State_RE_framework.pdf

http://wrldc.in/docs/Comments_invited_on_Draft_Procedure_for_implementation_of_Inter-State_RE_framework.pdf

WESTERN Region system Recovery Procedure………To be updated by 31-Dec-15

WESTERN Region Reactive Resource Document…..…To be updated by 31-Dec-15

14-Oct-15

14

Agenda Points

8.7: Information of Element tripping / Emergency Shutdown

• Element tripping being updated on the web based outage reporting system of WRLDC

• Breakdown maintenance allowed for restoration of the element (29-Sep-15 case)

• Element availability can be monitored over the SCADA system available through shared database to all SLDCs

• Important elements could be monitored through special displays

• In case of emergency outage of important elements within a State concerned utilities to keep the respective SLDCs as well as WRLDC in loop. (3-Oct-15 Case)

• SLDCs also to keep WRLDC informed of the switching operations on important grid elements

14-Oct-15

15

48

MW

9.1: N-1 Adequacy at 765 kV Akola(2) and 765 kV Tiroda

• Presently there is only one 1500 MVA, 765/400 kV ICT at 765 kV Akola(2) and 765 kV Tiroda substations

• System is N-1 non-compliant at 765 kV Tiroda and 765 kV Akola(2).

• Synchronization of ICT at Akola would be a challenge after tripping due to high angular separation

14-Oct-15

16

9.2: Adequacy 9.2: Adequacy 9.2: Adequacy 9.2: Adequacy of shunt capacitive compensation at of shunt capacitive compensation at of shunt capacitive compensation at of shunt capacitive compensation at Indore/Ujjain Indore/Ujjain Indore/Ujjain Indore/Ujjain AreaAreaAreaArea

• In 465th OCCM held in Nov 2014, low voltages was reported around Indore & Ujjain in morning hours (5:00-10:00 Hrs) due to high agricultural loads during Rabi season.

• SLDC Madhya Pradesh may ensure adequacy and healthiness of capacitor banks nearby Indore area

Substation (Having

Capacitors)

MVAR

Capacity

132 kV Indore South Zone 1x10

132 kV Nagda 1x10

132 kV Shujalpur 1x50

132 kV Indore STG2 1x10

220 kV Indore 2x25

Total 130

400/220 kV ICT-2 at Indore to be expedited

9.1: Under Voltage Load Shedding Scheme (UVLS)

• Discussed in 469, 471, 473, 474 and 475 OCCM

• Low Voltage Setting as provided in 475th OCCM

Maharashtra: 365 kV with 5 sec delay for 400 kV S/S

Gujarat : 185 kV with 5 sec delay for 220kV S/s.

MPPTCL, CSPTCL, Goa, DD, DNH : …………

SLDC Maharashtra and Gujarat may inform progress of the UVLS implementation

14-Oct-15

17

9.3 Blindfolded operation for significant part of the Maharashtra/WR grid (deliberated since Dec-13 (22-Months)

WRLDC -POSOCO

• Last OCCM MSETCL stated that data from six substations (two 400 kV and four 220 kV

substations) are expected to be integrated by 30th Sept 2015 are yet to be completed.

Observability only 64.8 %

Nos of Stations Generating

Stations765/400 kV

Substations220 kV

Substations TotalTelemetry required at WRLDC

A 32 17 178 227Telemetry not integrated with

WR-SCADA B 0 4 19 23Telemetry is intermittent

C 4 4 49 57% Observability at WRLDC

(A – (B+

C)/A 87.5% 52.9 % 61.7% 64.8%

9.4: Mock 9.4: Mock 9.4: Mock 9.4: Mock Black Start Exercise in Western Black Start Exercise in Western Black Start Exercise in Western Black Start Exercise in Western RegionRegionRegionRegionGenerating Station Completed Mock exercise in year 2015 ( Only 6 out of 29 Generating Station)

Proposed Date for Mock drill for Hydro Generating Stations

Generating station Date of mock drill exercise

1 Kadana, Gujarat 19th Feb 2015

2 CLPIPL, Gujarat 6th March 2015

3Hasdeo Bango,

Chhattisgarh17th May 2015

4Khopoli Hydro,

Maharashtra23rd August 2015

5 Tons 8th Oct 2015

6 Bargi 12th Oct 2015

Constituents are requested to plan and complete the mock exercise of Black Start

Stations as per the IEGC regulation 5.8(c )

Generating

Station

Proposed Date for

Mock Drill

1 Pench 6th Nov 2015

2 Indira Sagar 17th Nov 2015

3 Gandhi Sagar 27th Nov 2015

4 Rajghat Governor Problem

5 Madhikheda Governor Problem

6 Birsingpur Governor Problem

7 SSP, NCA Indore 29th Nov’15

14-Oct-15

18

9.6: Load 9.6: Load 9.6: Load 9.6: Load Forecasting in Western Forecasting in Western Forecasting in Western Forecasting in Western RegionRegionRegionRegion

• During the 475th OCCM it was agreed that all the SLDCs would submit the day ahead load forecast to WRLDC by 1500 hrs.

• SLDC Gujarat, Maharashtra, Madhya Pradesh and Chattisgarh sending their Load forecasts to WRLDC on daily basis

• SLDC Goa, DD, DNH and ESIL: Requested to send their day ahead load forecasts to WRLDC

SLDC Goa, DD, DNH and ESIL may appraise the status.

14-Oct-15

19

14-Oct-15

20

14-Oct-15

21

All India Grid SPS Modification in All India Grid SPS Modification in All India Grid SPS Modification in All India Grid SPS Modification in view of 765 kV Aurangabadview of 765 kV Aurangabadview of 765 kV Aurangabadview of 765 kV Aurangabad----

Sholapur commissioning Sholapur commissioning Sholapur commissioning Sholapur commissioning

NEWNEWNEWNEW––––SR Grid corridor SR Grid corridor SR Grid corridor SR Grid corridor SPSSPSSPSSPS----RevisionRevisionRevisionRevision

• In view of Commissioning of 765 kV Aurangabad-Sholapur D/C.

• WR-SR transfer capability would be in the 3500-4000 MW and the limiting constraint would vary

depending on Load-generation and network topology

• The flow on 2 X 765kV Raichur-Sholapur S/C would be in the range of 2500 MW to 3000 MW

• The flow on 765 kV Aurangabad-Sholapur D/C would be in the range of 3000 MW to 3500 MW.

14-Oct-15

22

Desired Actions to Improve SPSDesired Actions to Improve SPSDesired Actions to Improve SPSDesired Actions to Improve SPS

Improving reliability of SPS : Redundant Measurements, Logic , Communication path and End terminals

Use of metering core of CTs and PTs : for SPS logic , particularly where the same is based on steady state

flows crossing a particular value.

Need to cover more generators in the NEW grid: Adequate relief to be made available as many

antecedent generation in many of the generators selected is already very low.

Wiring of each SPS operation to the local substation Event Logger.

Triggering of each SPS action and the receipt of signal at each point to be recorded in SLDC/RLDC/NLDC

SCADA

Prompt submission of data to RLDCs regarding SPS action in the prescribed format.

Each instance of inadequate relief through SPS to be thoroughly analysed and remedial actions taken so

as to have increased confidence on the SPS reliability..

SPSSPSSPSSPS----1: Sholapur 1: Sholapur 1: Sholapur 1: Sholapur RaichurRaichurRaichurRaichur FlowFlowFlowFlow

Existing Proposed Actions required

Triggering Criteria

(Both 765 kV Solapur-

Raichur circuits are in

service)

Total flow on 2 X 765 kV

Sholapur-Raichur S/C lines

crossing a pre-set value of

1500 MW in Sholapur to

Raichur direction and

remains above 1500 MW

for 2.5 seconds.

SPS should trigger when


Sholapur-Raichur S/C

lines crosses 3500 MW

and remains above 3500

MW for 5 seconds.

1. SPS Setting to be

changed and to be

tested.

2. SPS signal to be

included in SOE send

to WRLDC

Quantum of generation

Reduction In Western

region

800 MW : JPL-150 MW, JPL

Extn – 150 MW, KSK-100

MW, LANCO -100 MW, DB

Power-100 MW, KWPCL-

100 MW, BALCO-50 MW,

NSPCL-50 MW

Same Wiring of SPS in

generating station to the

units for the devised

Quantum reduction

Load Shedding in

Southern Region

500 MW in SR Different set of Loads to beidentified, 500-1000MW

additional load shedding in

SR

SR Constituents

14-Oct-15

23



Triggering Criteria

(Both 765 kV Solapur-

Raichur circuits are in

service)





Raichur direction sensed

both at Sholapur and

Raichur: Instantaneous

triggering.


the total flow on 2 X 765

kV Sholapur-Raichur S/C

lines crosses 4000 MW


MW for 2.5 seconds in

Sholapur to Raichur

direction sensed both at

Sholapur and Raichur


changed and to be

tested.

2. SPS signal to be


to WRLDC



region






NSPCL-50 MW




Quantum reduction

Load Shedding in

Southern Region

500 MW in SR Different set of Loads to beidentified, 500-1000MW

additional load shedding in SR

SR Constituents



Triggering Criteria

(Only one line of 765

kV Solapur - Raichur

circuits are in service)

Total flow on 765 kV




Raichur and remains

above 1000 MW for 2.5

seconds.


the flow on the 765 kV

Sholapur- Raichur S/C

line crosses 2000 MW


MW for 2.5 seconds.


changed and to be

tested.

2. SPS signal to be


to WRLDC



region






NSPCL-50 MW




Quantum reduction

Load Shedding in

Southern Region

500 MW in SR Different set of Loads to

be identified, 500-

1000MW additional load

shedding in SR

SR Constituents

14-Oct-15

24



Triggering Criteria

(Only one line of 765

kV Solapur - Raichur

circuits are in service)

Total flow on 765 kV




Raichur: Instantaneous

triggering

To be Blocked To be Blocked



region






NSPCL-50 MW

- -

Load Shedding in

Southern Region

500 MW in SR- -

SPSSPSSPSSPS----3: 3: 3: 3: Loss of import of SRLoss of import of SRLoss of import of SRLoss of import of SR


Triggering Criteria Loss of 765 kV Sholapur-

Raichur lines carrying 800

MW towards SR.


loss of import of SR on

765 kV Sholapur-Raichur

section due to tripping of

these lines is more than

1500 MW.


changed and to be

tested.

2. SPS signal to be


to WRLDC



region

No Generation reduction.

- -

Load Shedding in

Southern Region

500 MW in SR Different set of Loads to

be identified, 500-

1000MW additional load

shedding in SR

-

14-Oct-15

25

SPSSPSSPSSPS----4: 4: 4: 4: RaipurRaipurRaipurRaipur----WardhaWardhaWardhaWardha D/CD/CD/CD/C


Triggering Criteria Flow on either circuit of 400 kV

Raipur – Wardha D/C crossing 850

MW and remaining above this

value for 2.5 seconds “Or” Tripping

of any one circuit of 400 kV Raipur

– Wardha D/C carrying 700 MW or

above.

Same as previous 1. SPS Setting to be

changed and to be

tested.

2. SPS signal to be

included in SOE

send to WRLDC

Quantum of Generation


region

800 MW : JPL-150 MW, JPL extn –

150 MW, KSK – 100 MW, LANCO –

100MW, DB Power – 100 MW,

KWPCL – 100 MW, BALCO – 50 MW,

NSPCL – 50 MW

Load Shedding in Western

Maharashtra-

200-300 MW Load to be

identified and Wired in

Western Maharashtra

System

1. 200-300 MW Load in

Western Maharashtra to

be identified and Wired

Load Shedding in Southern

Region

800 MW Load shedding in SR 500 MW Load in SR to

be identified and WiredSR Constituents

SPSSPSSPSSPS----5: 5: 5: 5: WardhaWardhaWardhaWardha----ParliParliParliParli D/C D/C D/C D/C Existing Proposed Actions required

Triggering Criteria Flow on either circuit of 400

kV Wardha - Parli D/C crossing

850 MW and remaining above

this value for 2.5 seconds “Or”

Tripping of any one circuit of

400 kV Wardha - Parli D/C

carrying 750 MW


changed and to be

tested.

2. SPS signal to be

included in SOE

send to WRLDC

Quantum of

Generation Reduction

In Western region

800 MW : APML : 600 MW

Mouda : 200 MW800 MW : JPL-150 MW, JPL extn –



KWPCL – 100 MW, BALCO – 50

MW, NSPCL – 50 MW

Load Shedding in

Western Maharashtra-

200 -300MW Load to be identified

and Wired in Western

Maharashtra System



Western Maharashtra

System

Load Shedding in

Southern Region

800 MW Load shedding in SR 500 MW Load in SR to be

identified and WiredSR Constituents

14-Oct-15

26

SPSSPSSPSSPS----6: 6: 6: 6: ParliParliParliParli----SolapurSolapurSolapurSolapur D/C D/C D/C D/C


Triggering Criteria Flow on either circuit of 400 kV

Parli – Sholapur D/C crossing 800

MW and remaining above this

value for 2.5 seconds “Or” Tripping

of any one circuit of 400 kV Parli –

Sholapur D/C carrying 700 MW or

above


changed and to be

tested.

2. SPS signal to be

included in SOE

send to WRLDC



region

800 MW : JPL-150 MW, JPL extn –



KWPCL – 100 MW, BALCO – 50 MW,

NSPCL – 50 MW

Load Shedding in Western

Maharashtra-



Western Maharashtra

System



Western Maharashtra

System


Region

800 MW Load shedding in SR 500 MW Load in SR to

be identified and WiredSR Constituents

SPSSPSSPSSPS----7: 7: 7: 7: 765kV 765kV 765kV 765kV RaichurRaichurRaichurRaichur----Sholapur line current exceeding 800 Sholapur line current exceeding 800 Sholapur line current exceeding 800 Sholapur line current exceeding 800 AmpAmpAmpAmp


Triggering Criteria

(Only one line of 765 kV

Solapur - Raichur circuits

are in service)

Total flow on 765 kV Sholapur-

Raichur S/C lines crossing a pre-set

value of 1000 MW (800 Amps) in

Sholapur to Raichur and remains

above 1000MW for 10 seconds ---

Trips the line

Line Tripping to be

blocked

To be Blocked



region - - -


Region- - -

14-Oct-15

27

SPSSPSSPSSPS----8: 8: 8: 8: 765 kV 765 kV 765 kV 765 kV AurangabadAurangabadAurangabadAurangabad----Sholapur D/C flow > 2000 MW Sholapur D/C flow > 2000 MW Sholapur D/C flow > 2000 MW Sholapur D/C flow > 2000 MW

Proposed Actions required

Triggering Criteria

(Both 765 kV Aurangabad -

Solapur circuits are in service)

Tripping of 765kV Aurangabad-

Sholapur D/C carrying a pre-set

value of 2000 MW in Aurangabad

to Sholapur direction

1. SPS Logic to be implemented

and logic to be tested.

2. SPS signal to be included in SOE

send to WRLDC


Reduction In Western regionApproximately 500 - 1000 MW

generation may be backed down

from generators in W3 area.

Identification of generator and

wiring of signals


Region300 MW load Shedding in SR Grid SR Constituents

SPSSPSSPSSPS----8: 8: 8: 8: 765 kV 765 kV 765 kV 765 kV AurangabadAurangabadAurangabadAurangabad----Sholapur D/C flow > Sholapur D/C flow > Sholapur D/C flow > Sholapur D/C flow > 2500 2500 2500 2500 MW MW MW MW


Triggering Criteria



Tripping of 765 kV Aurangabad-







send to WRLDC






wiring of signals



14-Oct-15

28

SPSSPSSPSSPS----8: 8: 8: 8: 765 kV 765 kV 765 kV 765 kV AurangabadAurangabadAurangabadAurangabad----Sholapur D/C flow > Sholapur D/C flow > Sholapur D/C flow > Sholapur D/C flow > 3000 3000 3000 3000 MW MW MW MW


Triggering Criteria










send to WRLDC






wiring of signals



SPSSPSSPSSPS----8: 8: 8: 8: 765kV Aurangabad765kV Aurangabad765kV Aurangabad765kV Aurangabad----Sholapur D/C flow > Sholapur D/C flow > Sholapur D/C flow > Sholapur D/C flow > 3500 3500 3500 3500 MW MW MW MW


Triggering Criteria










send to WRLDC






wiring of signals



14-Oct-15

29

ObservationObservationObservationObservation

Loads identified for SPS-1, 3, 4, 5 & 6 shall be different from Talcher-Kolar HVDC SPS loads and

Kudankulam SPS loads.

Load Shedding of 200 -300MW required in Western Maharashtra System as SPS-5 (Wardha-

Parli) has operated several times in high demand period of Maharashtra.

With the commissioning of 765 kV Aurangabad-Sholapur D/C, 765 kV and 400 kV lines loadings

are likely to increase drastically with operationalization of LTA.

Loads identified for SPS shall be different from the loads identified for UFR.

In the event of tripping of single circuit or both circuits of 765 kV Raichur-Sholapur, a signal

may be sent to Talcher-Kolar HVDC for ramping up the HVDC set-point to 2500MW. This would

reduce the overloading of AC lines in WR-SR corridor.

THANK YOU

Anaulagnak 2.1

maah isatmbar 2015

1. INTEGRATED OVER AN-HOURek GaMTo maoM samaakilat

1.1 MAXIMUM FREQUENCY 50.13 Hz. BETWEEN 1500 Hrs & 1600 Hrs Hrs. ON 20.09.2015AiQaktma AavaRi%t

1.2 MINIMUM FREQUENCY 49.72 Hz. BETWEEN 0000 Hrs & 0100 Hrs Hrs. ON 05.09.2015nyaUnatma AavaRi%t

1.3 AVERAGE FREQUENCY 49.95 Hz.AaOsat AavaRi%t

2. INSTANTANEOUS ta%kailak

2.1 MAXIMUM FREQUENCY 50.33 Hz. AT 16:06:00 Hrs. ON 20.09.2015AiQaktma AavaRi%t

2.2 MINIMUM FREQUENCY 49.52 Hz. AT 19:13:00 hrs Hrs. ON 03.09.2015nyaUnatma AavaRi%t

3. %AGE OF TIME WHEN FREQUENCY WAS SEPTEMBER 2015 AUGUST 2015 JULY 2015

AavaRi%t ka samaya p`itSat maoM

3.1 BELOW 48.5 Hz. 0.00 0.00 0.00 48.5 hT\ja ko naIcao3.2 BETWEEN 48.5 Hz. AND 48.8 Hz. 0.00 0.00 0.00 48.5 hT\ja AaOr 48.8 hT\ja ko baIca3.3 BETWEEN 48.8 Hz. AND 49.2 Hz. 0.00 0.00 0.00 48.8 hT\ja AaOr 49.2 hT\ja ko baIca3.4 BETWEEN 49.2 Hz. AND 49.5 Hz. 0.00 0.00 0.00

49.2 hT\ja AaOr 49.5 hT\ja ko baIca3.5 BETWEEN 49.5 Hz. AND 49.7 Hz. 0.65 0.31 0.21 49.5 hT\ja AaOr 49.7 hT\ja ko baIca3.6 BETWEEN 49.7 Hz. AND 49.9 Hz. 28.74 14.72 10.43 49.7 hT\ja AaOr 50.2 hT\ja ko baIca3.7 BETWEEN 49.9 Hz. AND 50.05 Hz. 59.83 70.00 70.29

49.9 hT\ja AaOr 50.05 hT\ja ko baIca3.8 BETWEEN 50.05 Hz. AND 51.5 Hz. 10.78 14.97 19.07

50.05 hT\ja AaOr 51.5 hT\ja ko baIca3.9 ABOVE 51.5 Hz. 0.00 0.00 0.00

51.5 hT\ja ko }pr

4.1 NO. OF TIMES FREQUENCY 0 0 0 TOUCHED 48.80 Hz. AavaRi%t 48.80 hT\ja kao CUhI



maoM AavaRi%t ko AaMkD,aoM ka ivavarNa

FREQUENCY PARTICULARS DURING SEPTEMBER 2015

(AS PER FREQUENCY REPORT OF WRLDC)

(piScama xao~ Baar p`oYaNa kond` kI AavaRi%t irpaoT- ko AaQaar pr)

Voltage Profile during the month of Sep. 2015Annex-I

Date

Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv

1 414 398 411 398 433 405 431 400 417 402 417 408 420 409 401 3802 413 397 410 397 431 408 431 396 416 397 416 404 418 411 402 3773 410 393 408 394 430 404 427 391 413 397 416 404 416 408 404 3824 414 400 411 399 429 402 427 398 416 403 415 406 414 407 406 3875 413 399 412 397 429 402 432 400 416 403 416 406 415 405 409 3906 416 400 413 398 433 407 429 391 417 405 417 408 418 407 406 3917 413 397 410 396 430 409 429 396 416 402 416 408 414 407 402 3868 417 400 413 401 429 415 429 404 416 403 416 408 417 409 400 3779 414 398 410 396 435 412 428 409 414 400 415 405 415 407 400 383

10 414 401 413 399 434 416 433 404 414 403 416 407 415 408 400 38811 414 401 413 399 434 416 433 404 414 403 416 407 415 408 400 38812 419 404 415 403 434 406 434 407 417 404 416 407 416 409 407 38913 418 406 415 404 436 417 434 403 417 405 421 408 417 409 407 39014 419 402 414 400 436 414 430 400 417 403 418 407 414 407 407 39615 417 400 414 402 437 416 433 403 417 402 417 406 417 410 404 39216 417 403 415 404 436 414 433 409 416 402 417 405 417 411 406 38917 420 410 420 407 438 424 423 423 415 406 412 407 424 416 405 38818 421 411 420 407 440 419 423 418 417 405 417 407 422 413 409 39219 424 409 419 407 438 414 431 411 421 406 419 409 420 412 411 40020 423 411 420 408 438 415 423 418 420 409 418 409 422 414 414 40121 424 404 421 405 437 417 423 423 423 404 419 407 422 412 414 40022 423 400 418 407 439 400 423 400 423 400 419 400 421 400 413 39923 421 404 415 403 434 412 423 423 421 405 417 407 415 407 411 40024 421 404 416 403 430 405 432 407 420 405 416 407 415 404 408 40025 421 404 417 404 431 408 432 404 420 404 417 408 416 408 408 39626 420 400 416 402 431 404 432 402 419 403 416 405 415 405 407 39527 419 407 418 404 434 410 432 403 418 408 417 409 415 407 407 39628 418 402 415 402 430 405 428 400 419 402 417 404 414 406 407 39129 418 402 415 402 430 405 428 400 419 402 417 404 414 406 407 39130 419 399 419 400 431 407 430 395 417 399 417 406 414 405 406 388

424 393 421 394 440 400 434 391 423 397 421 400 424 400 414 377

2015Annex-2.3

इंदौर इटारसी कराड धुले असोज कासोर जेतपुरIndore Itarsi Karad Dhule Asoj Kasor Bhilai Jetpur

Date

Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv Max. Kv Min. Kv

Documents

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