Baart sarkar Government of India kond`Iya ivaVut p`aiQakrNa Central Electricity Authority piScama xao~Iya ivaVut saimait Western Regional Power Committee ef …

Baart sarkarGovernment of India kond`Iya ivaVut p`aiQakrNa

Central Electricity Authority piScama xao~Iya ivaVut saimait

Western Regional Power Committee ef -3, emaAayaDIsaI xao~, AMQaorI (pUva-), mauMba[- - 400 093

F-3, MIDC Area, Andheri (East), Mumbai - 400 093

Aa[- esa Aao : 9001-2008

ISO: 9001-2008

dUrBaaYa Phone: 022- 28221681; 28200194; 28200195;28200196 fO@sa Fax : 022 – 28370193 Website: www.wrpc.nic.in E-mail : [email protected]

saM: Paxaoivasa/p`caa. / Pa`sasa-kaya-vaR%t /2013-14/ 11806 idnaaMk 28.11.2013 saovaa maoM, ivaYaya:- p.xao.iva.saimait, mauMba[- kI Pa`caalana evaM samanvaya saimait kI 453 vaIM baOzk ka

kaya-vaR%t.

mahaodya,

piMScama xao~Iya ivaVut saimait, mauMba[- kI Pa`caalana evaM samanvaya saimait kI idnaaMk 15.11.2013 kao WRLDC, MUMBAI maoMoM Aayaaoijat 453 vaIM baOzk ka kaya-vaR%t AapkI saUcanaaqa- saMlagna hO .

Qanyavaad.

BavadIya,

saMlagna : ]Parao@tanausaar ( laxmaI kant isaMh razaoor)

kRto AQaIxaNa AiBayaMta (p`caalana)

MINUTES OF 453RD MEETING OF OPERATION & COORDINATION SUB-COMMITTEE OF WRPC HELD ON 15th NOVEMBER 2013

AT WRLDC, MUMBAI

The 453rd meeting of Operation & Co-ordination Sub-Committee of WRPC was held on 15th November 2013 at WRLDC, Mumbai. The list of participants is enclosed at Annex-I.

Shri S D Taksande, Member Secretary, WRPC extended warm welcome to the members and participants of the 453rd OCCM.

He informed that

1. 400kV Parli-Pune Ckt -1 & Ckt-2 charged on 08.11.2013 and 10.11.2013

respectively.

2. Synchronization of SR- NEW grid will be done by December 2013 end provided

all prerequisites are completed.

3. CGPL Mundra all units got desynchronized on 14th November 2013 as

incoming coal conveyor belt got a major fire. The recovery procedure is in full

swing & it is expected all units will be synchronized by 25th November, 2013.

4. 1800 MW generating capacity has been added during last month which include

Korba West(IPP) Unit -1 of 600 MW, D B Power unit No-1 of 600 MW and JPL

Ext Unit-2 of 600 MW.

5. Black Start Mock Drill at Kawas Gas Power Station(NTPC) has successfully

performed on 15.10.2013.

6. Protection Audit at TAPS 1&2, 3&4 carried out on 13.11.2013 by the group

nominated by WRPC

7. SPS at APL, Tiroda and CGPL commissioned and operational with inputs from

Wardha PGCILS/S, however, SPS at Tiroda needs change due to

commissioning of 400 kV Wardha – Chandrapur Ckt.

8. Meeting on Reserve shutdown of NTPC coal units and issues of declaration of

separate DCs on domestic and imported coal by NTPC is scheduled on

27.11.2013 and decision of running of coal fired NTPC units will be reviewed

accordingly.

9. ESIL has been granted transmission licensee in ISTS transmission line

availability certification will be issued by WRPC on monthly basis.

Minutes of 453rd OCC meeting held on 15th November 2013

He informed that Western Regional Grid registered maximum demand of 39233 MW

during October 2013, which was about 4.05 % less than the registered demand of

40890 MW met during the same month last year. (In September 2013, it was 38807

MW). The unrestricted demand was 39272 MW as compared to 41479 MW during the

last year. The decrease in unrestricted demand is of the order of 5 %. (In September

2013, it was 39562 MW). He further informed that frequencies remain between 49.7 to

50.2 Hz for 89.19 % of the time during October 2013 & remain below 49.7 Hz for 1.01

%. Above 50.2 Hz for 9.80%. Frequency didn’t touched 48.8 Hz during the month.

He stated that important issues would be taken up for discussion before resorting to

regular agenda items. Thereafter following important issues were taken up for

discussion.

Member Secretary then requested to SE(Operation), WRPC to take up the regular

agenda items.

ITEM No. 1: CONFIRMATION OF THE MINUTES

Superintending Engineer(Opn), WRPC stated that the minutes of 452nd meeting of

Operation & Coordination Sub-Committee of WRPC held on 17th October 2013 at Navi

Mumbai were forwarded vide letter No. WRPC/OPN/OCC-Minutes/2013-14/10713 dated

24.10.2013.

CE, SLDC, MPPTCL, Jabalpur vide letter dated 08.11.203 commented on following

items:

C - TECHNICAL MINIMUM REQUISITION FOR COAL FIRED CENTRAL SECTOR GENERATING STATIONS:

SLDC MP representative informed that sub-committee that the requisition to ensure

technical minimum schedule of NTPC coal based units by MP is not possible as they

have to follow the merit order principle. He further informed that SLDC has to submit

the report of merit order dispatch followed by MP to MPERC & Govt. of MP as and

when required by them. He further infirmed that due to heavy rains, the demand of MP

could not pick up and running of Hydel Stations including Indira Sagar was also

restricted even in the period of spill over from reservoir. He stated that in view of the

above, MP shall continue to give their requisition as per their demand and merit order


dispatch principle and WRLDC may enhance the schedule to the technical minimum

levels in case of requisition from beneficiaries being lower than the technical minimum

as mentioned in para 1 above. SLDC MP representative requested Member Secretary

to record the comments of MP in the minutes of 452nd OCC meeting but the same is

not included in the above minutes. It is therefore requested to include the comments of

MP in the minutes of 452nd OCC meeting. It is also to mention that SLDC’s view on

scheduling of technical minimum in case consolidated requisition by all beneficiaries is

less than technical minimum of stations was also narrated by SLDC representative in

the OCC meeting.

Member secretary, WRPC informed that the decision taken in 24th WRPC meeting in the matter of RSD of NTPC station was intimated to OCC members and as WRPC is apex forum of WRPC its decision cannot be overridden by OCC sub-Committee. Also, there were concern constraint expressed by beneficiaries in WRPC meeting and after due deliberation WRPC took above decision till any firm decision. Therefore decision of WRPC is binding till further directives are received from WRPC forum.

This item was confirmed without any modification.

9.15 FREQUENT TRIPPING OF 220 kV AURAIYA MALANPUR AND AURAIYA MEHGAON:

SLDC MPPTCL requested to included following:

“SE (Opn.) requested MP to submit updated status of frequent tripping of 220 kV

Auraiya –Malanpur and Auraiya-Mehgaon Circuits on Single phase to earth fault.

SLDC MP representative informed that the Shutdown was taken on Malanpur-Auraiya

Line on 08,09 and 10.10.2013 for patrolling work and replacement of flash over disc.

He further informed that after availing shut down there is no tripping occurred on the

Malanpur – Auraiya line. He informed in the meeting that the shut down on Mehgaon –

Auraiya line has been planned on 18.10.2013 and 19.10.2013 for patrolling work and

replacement of flash over disc.”

OCC agreed to included above in the minutes of 452nd OCC meeting.

Minutes of 452nd OCCM were confirmed with above modifications.


ITEM No.2: REVIEW OF SYSTEM OPERATION DURING THE MONTH OF

OCTOBER 2013

SE(Operation), WRPC requested WRLDC to brief the Committee on Grid Operation

experiences during October 2013.

Chief Manager, WRLDC in the presentation ( copy attached at Annexure – 2 in soft copy) concentrated broadly on the performance of the grid for month of October 2013 as below:

Frequency Particulars WRLDC presented the following highlights of grid operation during the month of

October 2013.

During October 2013 the system frequency was below 49.7 Hz for 1.01 % of time

against 1.51 % of time during September 2013. The system frequency was within the

IEGC range of 49.7 Hz -50.2 Hz for 89.19 % of the time against 89.24 % of time during

September 2013. The average monthly frequency was 50.03 Hz during October 2013,

whereas it was 50.02 Hz in the month of September 2013. Regarding operation in high

frequency range, frequency during the month of October 2013 was above 50.20 Hz for

9.80 % of time against 9.25 % of time during September 2013.

The detailed frequency particulars are enclosed at Annex- 2.1.

The Sub-Committee noted. Inter-regional exchanges status:

There was a net inter-regional export of 2223.27 MUs by WR against net export

schedule of 2366.73 MUs.

The Sub-Committee noted as above. 2.3 Voltage Profile

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

2013 furnished by WRLDC is enclosed at Annex-2.3.

During the month, the deviations of voltages from the accepted limit on either

side were recorded at the following locations in WR grid: -


S.No. 765/400kV Sub-

station Max. Voltage

observed (kV)

Date of incidence Min. voltage

observed (kV)*

Date of incidence

1 Indore 425 10.10.13 - -

2 Itarsi 426 11.10.13 - -

3 Karad 440 03.10.13 - -

4 Dhule 437 17.10.13 - -

5 Asoj 420 04.10.13 - -

6 Kasor 424 14.10.13 - -

7 Bhilai 430 07.10.13 - -

8 Jetpur 421 25.10.13 - -

9 Bina 424 10.10.13 - -

10 Gwalior 417 29.10.13 - -

11 Nagda 427 30.10.13 - -

12 Khandwa 433 31.10.13 - -

13 Seoni 802 03.10.13

14 765kV Bina 807 26.10.13 - -

15 765 kV Gwalior 803 20.10.13 - -

• Minimum voltages beyond IEGC range were not observed at above substations.

WRLDC intimated that since about 30th October it is observed that voltages at Indore,

Nagda, Bina and Gwalior had been reducing gradually to about 395kV between

08:00hrs-11:00hrs. On 30.10.2013 the voltage at Indore reduced to 385kV at

08:38hrs. The typical voltage profile at Indore is shown below (plotted from SCADA,

the spikes are due to change of data from non-current state to current state):


The maximum and minimum voltages at the above stations (as per SCADA) on

30.10.2013 are mentioned below:

400 kV Station Maximum (kV) Minimum (kV)

Indore 420 385

Itarsi 420 386

Nagda 427 387

Bina 419 391

Gwalior 411 387

The following measures are to be implemented:

a. Bus reactors at Indore(PG), Nagda, Itarsi, Bina(MP), Bina (PG) and

Gwalior are to be switched off at 08:00hrs and to be switched on at

about 09:45hrs.

b. VAR generation at Satpura, JaypeeBina to be ensured during the above

period.

c. The hydel generation at Indira Sagar and Omkareshwar can be

maximized between the above period.

d. The lines opened to control O/V voltage during night hours are to be

taken into service by 07:30hrs when the M.P. demand starts increasing.

Similarly the voltages at 400 kV Parli and 400 kV Sholapur are about 390kV in the

afternoon hours when the demand in Maharashtra is high. Necessary measures of


taking all opened lines into service and switching of bus reactors to be ensured by

MSETCL and WRTS-I.

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

As per WRLDC records during October 2013 the system frequency didn’t touch 48.8

Hz. The details of UFR operation received from constituents for the month of October

2013 is enclosed at Annexure 2.4.

GETCO has reported, AUFLS on five occasions in October 2013. GETCO had also

informed UFR operation in the month of September when frequency did not touch 49.2

Hz. Matter was discussed in 452ndOCC and Gujarat was advised to check the relay

setting. GETCO representative was requested to review the relay setting to avoid

unintentional operation of UFR.

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

The committee noted the details of Power Cuts and Regulatory Measures during

October 2013 as furnished by the state utilities as per the enclosed Annexure-2.5.

The Sub-Committee noted the above. 2.6 Details of Generating Units under Forced outages

Details of generating units under forced outages during October 2013 were discussed. The modified details of force outages programme of Generating units are given in Annexure-2.6.

The Sub-Committee noted the above. 2.7 Details of Generating Units under Planned outages The status of planned outage is modified as per intimation by concern members. The modified details of generating units under Planned Outages during October 2013 are given in Annexure-2.7.

The Sub-Committee discussed and finalized the planned outages.


ITEM No.3: OPERATIONAL PLANNING 3.1 Proposed outage programme of generating units

The maintenance programme of generating units for November 2013 & December 2013 was discussed. The Sub-Committee finalized the outage schedule of generating units for the above period and the modified outages plan is placed at Annexure-3.1.

3.2 A. Outage Programme of Transmission Lines/elements

SE(Opn), WRPC informed that for the 454th OCC transmission elements outages planning data, must be submitted on or before 03.12.2013. Inter-regional outages proposal must be submitted on 01.12.2013 so that it can be take up with the counterpart of other region as well as NLDC. The Committee discussed the maintenance Programme for transmission lines/elements for the months of November & December 2013.

The Sub-Committee discussed and finalized the planned outages(enclosed at Annexure-3.2 A & Annexure-3.2 B).

B. Line outages planned vs. implemented:

In 453rd OCC it was decided that the status of lines planned vs. lines availed and any

deviation from planning or emergency outages for the concerned month shall be

submitted by WRLDC for discussion in respective OCC. Accordingly in the next OCC,

WRLDC would furnish the status of complete list of line outages during the month of

November 2013 planned vis-à-vis implemented.

WRLDC submitted the status of planned transmission element outages vs.

actual availed or emergency outages during the October 2013(Attached at Annexure-

3.2-C2).

The statistics for planned vs availed outage during October 2013 is summarized below:

S No. Particulars of OCC approved Outage Number

1 Number of transmission element outage approved in 451st OCC meeting

226

2 Number of transmission elements for which reliability consent was available

218


3 Number of outage availed 90

4 Availed Outage as a % of Approved Outage 41.3%

Utility-wise statistics of availed outage as a % of approved outage is displayed below:

50%

87%

38% 30% 28% 36%

100%

58%40%

100%

0%20%40%60%80%100%120%

0102030405060

OCC Approved Outage Statistics for Oct 2013

Approved Availed % age

As agreed during the 452ND OCC meeting the respective utilities were requested to

apprise the sub-committee regarding reason for failing to avail approved outages.

SE(Operation), WRPC pointed out that out of approved transmission outages bulk

quantum of outages are not availed by constituents even when there is no real time

condition problem. He further stated that after approving outages for particular date

for particular line, outage on parallel line or for the line in the same corridor is very

difficult owing to consideration of the fact that the approved outage would be availed

by that constituent. But non-availing of such outage by any constituent deprives other

constituent requiring important outage. Also, sometimes the outages for two agencies

are clubbed together with change in dates suitable to one agency. In case such

outage is not availed by the agency for whom the dates are suitable, other agency

unnecessarily have to shuffle their plan/manpower which cause trouble to them.

He requested constituents to restrict the proposal on outages to really required. The Sub-Committee noted as above.


3.3 ANTICIPATED POWER SUPPLY POSITION FOR THE MONTHS – NOVEMBER 2013 & DECEMBER- 2013

Anticipated Power Supply Position for the months of November 2013 & December 2013

were discussed. The details of anticipated regional deficit are given below:

(All figures in MW) State/ Region

November 2013 December 2013 Anticipated Availability

Anticipated Peak Demand

Shortage AnticipatedAvailability

Anticipated Peak Demand

Shortage

GETCO 11381 11640 259 11115 11340 225

MPPTCL 10220 10220 0 11446 11446 0

CSEB 2972 3003 31 2894 2915 21

MSETCL 17250 18300 1050 17200 18200 1000

GOA 425 430 5 409 425 16

DD 355 355 0 345 350 5

DNH 645 645 0 645 650 5

WR 41422 43066 1644 41836 43583 1747

Details of anticipated restricted & un-restricted demands for the months of November 2013 & December 2013 are given in Annex 3.3 (A). The Sub-Committee noted as above. ITEM No. 4: OPERATIONAL STATISTICS FOR THE MONTH OF OCTOBER 2013 The details of schedule Vs actual generation, demand, drawl of power from

grid; exchanges etc. are given in the following Annexure:

Annex 4.1 - Schedule Vs Actual Generation and Requirement for October 2013

Annex 4.2 - Peak Demand: Schedule Vs Actual for October 2013

Annex 4.3 - Integrated Operation of the System & Operation of Inter State Tie lines for

October 2013

Annex 4.5- Details of Declared Capacity, Schedules and Injections from Central sector

stations, Drawl Schedules and Entitlements of constituents during October 2013

Annex 4.6 - Inter System Exchanges for October 2013

Annex 4.7- Details of level of Major Reservoirs in Western Region for October 2013

The sub-Committee noted as above.


ITEM No. 5: SYSTEM DISTURBANCE IN WESTERN REGION

There was no major grid disturbance in the Western Region during the month.

The consolidated list of other grid disturbances as furnished by WRLDC is attached at Annexure- 5.

The tripping details and Voltage profiles have to be furnished by WRLDC to WRPC on

first working day of the month. The same has to be reported to MOP via GM division

of CEA. Accordingly, WRLDC were requested to furnish the tripping details to WRPC

along with details immediately in the event of tripping.

The Sub-Committee noted as above.

ITEM No. 6. Confirmation of Healthiness status of SERs/DRs 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 08.11.2013 2 PGCIL,WRTS-II 06.11.2013 3 MPPTCL 15.11.2013 4 NTPC 06.11.2013 5 CSPTCL 04.11.2013 6 GETCO 07.11.2013 7 MSETCL 15.11.2013

Constituents of WR were requested to continue sending the information as per the

recommendation of enquiry committee of Grid disturbances on 25.02.2007 and

28.02.2007.

The Sub-Committee noted as above. 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.

As discussed in 453rd OCCM and as per the present status available on the work for

providing additional reactors at the various locations in WR.


Accordingly the information regarding the commissioning schedule is as below:

S. No.

400 kV Sub/stn.

Size (MVAR)

Implementing agency

Expected commissioning date

1 Ranchodpura 125 MVAR GETCO Commd. On 8th July 2013 2 Varsana 125 MVAR GETCO Commd. On 25th July 2013 3 Rajkot 125 MVAR GETCO Commd. On 5th August 2013 4 Amreli 125 MVAR GETCO Commd. On 12.07.2013 5 Jetpur 63 MVAR GETCO Commd. on 11.07.2013 6 Zerda 125 MVAR GETCO Commd. in July 2013 7 Limbdi

(Chornia) 125 MVAR GETCO 25th July 2013

8 Jabalpur 125 MVAR PGCIL June 2014 9 Khandwa 125 MVAR PGCIL June 2014 10 Shujalpur 125 MVAR PGCIL June 2014 11 Bhatapara 125 MVAR PGCIL June 2014 12 Raigarh 125 MVAR PGCIL June 2014 13 Aurangabad 125 MVAR PGCIL June 2014 14 Nanded 125 MVAR MSETCL 2014 15 Sholapur 125 MVAR MSETCL 2014 16 Kolhapur 125 MVAR MSETCL 2014 17 Akola 125 MVAR MSETCL 2014 18 Nagda 125 MVAR MPPTCL September 2014 19 Bhopal 80 MVAR MPPTCL March 2014 20 Damoh 125 MVAR PGCIL August 2014 21 Bachau 125 MVAR PGCIL August 2014 22 Pirana 125 MVAR PGCIL August 2014 23 Itarsi 2X125

MVAR PGCIL August 2014

24 Seoni 125 MVAR PGCIL August 2014 25 Parli 125 MVAR PGCIL August 2014 26 Raipur 125 MVAR PGCIL August 2014 27 Gwalior 125 MVAR PGCIL August 2014 28 Nagda 50 MVAR MPPTCL 2014 29 ISP 125 MVAR MPPTCL 2014 30 Satpura 50 MVAR MPPTCL 2014

1) During the discussion on the status of the reactors, MSETCL clarified that

implementation of Fixed reactors(instead of revival of existing CSRs) at Dhule

would now be in December 2013 instead of Oct.2013.

The respective utilities were requested to ensure that reactors are installed and commissioned according to the schedule agreed as above.


7.2 Status of completion of ongoing Transmission Schemes being executed/implemented by POWERGRID/ Other 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 Vapi(PG)-Navsari Commissioned on

16.03.2013 2 400 kV Navsari - Navi Mumbai D/C

Line Dec- 2013 ROW problem

3 765kV S/C Satna-Gwalior line (Ckt.-I) November - 2013

4 765kV S/C Satna-Gwalior line (359Km + 60Km D/C Portion) Ckt.-II

Dec.- 2013

5 765 kV Sasan-Satna-II Commissioned on 01.06.13

GUJARAT 1 400 kV D/C Kosamba-Chorania line

(Package I)(From Chorania S/S to AP-54)

December -2013

2 400 kV D/C Kosamba-Chorania line (Package II)(From Kosamba S/S to AP-54)

December -2013

3 400 kV D/C Mundra-Zerda line No. 1 December -2013

4 400 kV D/C Mundra-Zerda line No. 2 December -2013

5 400 kV D/C Vadinar-Amreli line December -2013

6 400kV Mundra-Hadala LILO to Halvad

December -2013

7 400 kV D/C Amreli-Kasor line(Part-1) December -2013

MADHYA PRADESH 1 Malwa-TPH-Pithampur 400KV

DCDS Line 23,24.10.2013

2 Malwa TPH-Chhegaon 400 KV DCDS Line

Ckt –I on 22.03.2013 Ckt-II on 11.07.2013

3 Chhegaon-Julwania 400 KV DCDS Line

March - 2014

4 Pithampur- Indore 400KV DCDS Line March- 2014

5 Satpura TPH-Ashta 400KV DCDS Line

December – 2014


CSPTCL 1 400 kV Korba (W)-Khedamara

DCDS Ckt II LILOed at Marwa August 2013 Test charged on

20.08.2013

2 400 kV Khedamara- Raita DCDS January -2014

3 400kV DCDS Marwa-Raipur(Raita) January -2014

Test charge from Raipur end in August 2013

4 LILOof 400kV K(W)-Khedamara line at Marwa (one ckt.)

January -2014

MAHARASHTRA(STU)

1 400KV Chandrapur- II- Warora D/C November -2013 end.

2 400KV D/C line from Koradi-II to Wardha S/S(PG) D/C

December-2013

MAHARASHTRA (IPTC route) by WR Transmission (Mah) Pvt. Ltd

1 400 kV Parli(PG)-Pune D/C Commissioned Ckt - 1 on 08.11.2013 Commissioned Ckt - 2 on 10.11.2013

2 400 kV Pune (PG)-Aurangabad (MSETCL) D/C

November-13 To be commissioned on 30.11.2013

3 LILO Lonikhand –Kalwa at Pune(PG) Lonikhand-Pune charged on 21:30 on 09.07.2013 and Kalwa –Pune at 21:45 on 09.07.2013.

GUJARAT (IPTC route) by WR Transmission (Guj) Pvt. Ltd

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

February -2014

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 year 2013-14 The status regarding Generating units, commissioned /expected to be commissioned during the current year 2013-14 according the available information is as below:


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

Date of Commissioning /Schedule Date

GUJARAT Ukai 6 500 COD on 08.06.2013

Pipavav CCPP- GPCL & GSPC joint venture Block-1 350 December 2013 Bhavnagar Lignite TPP-JV I 250 DEC 2013 II 250 DEC 2013 UNO SUGEN 1 382.5 COD on 04.04.2013 CHHATTISGARH Marwa TPS I 500 December 2013 Korba (w) Ext-5 500 COD on 05.09.2013 KSK Mahanadi 3 600 COD on 14.08.2013

VEDANTA VIDYUT 1 135 Synchronized on 11.08.2013

MAHARASHTRA INDIABULLS (Amaravati) 1 270 Synchronized on 03.06.2013

INDIABULLS (Amaravati) 2 270 January-2014

INDIABULLS (Sinnar) 1 270 March-2014

VIPL(Butibori) 1 300 COD on 05.04.2013

VIPL (Butibori) 2 300 December-13

GMR EMCO 2 300 COD on 27.08.2013

Dhariwal 1 300 Synd. On 2.9.13

MADHYA PRADESH

SINGAJI TPP 1 600

Synchronized on 31.08.2013

Coal fired on 30.09.2013

2 600 June-2014 M/s Jhabua Power, Seoni

1 300 JANUARY – 2014 MB Power, Anuppur

1 300 JANUARY – 2014 Satpura

11 250 Synchronized on 02.10.2013 SATPURA

10 250 COD on 18.08.2013

CENTRAL SECTOR Vindhyachal TPP IV 12 500 JAN-14

MAUDA 2 500 JAN-14


The Sub-Committee noted as above. ITEM NO. 8: MISCELLANEOUS OPERATIONAL ITEMS

(A) FOLLOW-UP

8.1 QUARTERLY REVIEW OF CRISIS MANAGEMENT PLAN

All the constituents are requested to submit the CMP report for the Second

quarter (July 2013 to September 2013) for the year 2013-14.


8.2 STATUS OF PHYSICAL & CYBER SECURITY IN POWER SECTOR REGARDING

Status of physical & cyber security in Power Sector for the Second quarter (July

2013 to September 2013) have not been received from some of the constituents.

Constituents were requested to furnish the latest status.


8.3 IEEE SMART GRID RESEARCH AND ROADMAP:

IEEE is unveiling a host of resources designed to foster continued innovation and advancement of the global Smart Grid. IEEE Smart Grid Research represents a concerted effort to build one of the industry’s most comprehensive portfolios of smart grid-related intelligence, including materials such as vision documents and research papers that address problems and challenges in both the long- and short-term. It leverages potential use cases, application scenarios and enabling technologies to deliver the most complete picture possible of the next generation of technology in each respective smart grid space. IEEE Smart Grid Research will have a long-term vision document, reference model, and roadmap for each of the five technology sectors, as well as shorter-term research available for addressing more immediate concerns.

IEEE Smart Grid Research fellow would made a presentation which covers projections of where the smart grid will evolve to, technology challenges and opportunities, and areas where additional research is needed.

Representative from IEEE gave a nice presentation(enclosed at annexure-8.3) on smart grid operation.



8.4 ELECTRICITY GENERATION PERFORMANCE REVIEW DURING THE PERIOD APRIL-SEPTEMBER 2013(1ST & 2ND Qtrs.):

Director(OPM), CEA, vide letter dated 24.10.2013 intimated that CEA has been

monitoring the performance of all generating stations in the country with a view to

improve availability of power in the country. During the Periodic review undertaking in

CEA, it has been observed that the following thermal generating stations have not

performed as per the programme/ targets fixed for the period April- September, 2013.

Sr

No. • Stations/U

nits

Capacity • Agency to furnish the

reason

1 SURAT LIG 500 SLPP SURAT

2 GANDHINAGAR TPS 870 GSECL

3 UKAI TPS 1350 GSECL

4 WANAKBORI TPS 1470 GSECL

5 BHUSAWAL TPS 1470 MSETCL

6 CHANDRAPUR 2340 MSETCL

7 PARLI 1170 MSETCL

8 MIHAN TPS 246 ABHIJIT MIHAN POWER PLANT

NAGPUR

9 GEPL TPP-I 120 GUPTA ENERGY PVT LTD.

NAGPUR

10 DSPM 500 CSPGCL

11 KORBA-II(E) 200 CSPGCL

12 PATHADI TPP 600 LANCO

13 TRAMBAY 1400 NPCIL


14 MAUDA 1000 NTPC

15 SIPAT 2980 NTPC

16 SANJAY GANDHI TPS 1340 MPPGCL

17 SATPURA TPS 1330 MPPGCL

18 BHILAI TPS 500 NSPCL

19 BINA TPS 500 J P BINA

Subsequently a letter from WRPC(Copy attached at Annexure-8.4-A) has issued to the

concern generating agency to furnish specific reasons which resulted in shortfall in

generation and proposed plan made if any so that the loss of generation suffered during

period April- September, 2013 could be made up during the remaining period of the year

2013-2014.

In response of the above NTPC HQ-II, Raipur furnished the reason(copy enclosed at

Annexure 8.4-B) and other respective generating stations/agencies are requested to

furnish the reasons.

The concern utilities are agreed to furnish the reasons at the earliest.


ITEM NO. 8.5 KORBA UNIT-6 R& M WORKS DURING 2014-15

A meeting of Annual Generating Unit outage planning was held on 18.10.2013 at

Mumbai, wherein the Korba unit # 6 outage planning for the year 2014-15, was

discussed and beneficiary members are not agreed as proposed by NTPC.

Beneficiary constituents are requested NTPC to preponed the outages in lean season.

AGM(OS), WR-II, NTPC, Raipur vide letter dated 28.10.2013(Copy attached at

Annexure-8.5), requested to allow to take the Korba Unit-6 outages from 21.11.2014

to 19.01.2015.

Member Secretary, WRPC stated that almost all the 500 MW unit of NTPC stations

are proposed in lean period(i.e. June-July 2014) except Korba unit No.-6. He further

informed that NTPC had tied maintenance program with M/s BHEL full year and


therefore requested the constituents to agree for the same as changing of any one

unit schedule would disrupt whole program.

Beneficiaries/utilities agreed on the same.


8.6 ANNUAL MAINTENANCE PROGRAMME OF GENERATING UNITS IN WR

DURING 2014-15.

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 come out with the draft outage programme for the Year

2014-15 by 30th November 2013 for Western Grid. Subsequently a meeting was held

on 18.10.2013 at WRLDC Mumbai, wherein Annual Maintenance programme of generating units in WR was discussed and finalized and abstract is attached at

Annexure 8.6. Annual Maintenance programme for the Korba unit-6 is agreed by

constituents as suggested by NTPC. Annual maintenance program from some the

generating agencies are still awaited and requested to furnished the maintenance

programme on or before 20th November, 2013, otherwise it will considered as no

outages during the year 2014-15 and report would submitted to CEA on 28th

November,2013.

The Sub-Committee noted as above and agreed to furnish the same.


ITEM NO. 8.7 CERTIFICATION OF AVAILABILITY WITH RESPECT TO ESSAR POWER TRANSMISSION COMPANY LIMITED

EPTCL vide letter dated 19th October, 2013 (copy enclosed at Annexure-8.7A)

intimated that M/S EPTCL has been declared as ISTS transmission licensee vide

Hon’ble CERC order dated 12.09.2013(copy enclosed at Annexure 8.7B).

Accordingly M/s EPTCL had requested for availability certification of following

transmission elements as per the existing CERC Regulations:

Sr No Name of transmission elements Ckt Km Effective COD

1 LILO of 400 kV S/c Vindhyachal-Korba

line at Essar Mahan

20 01.04.2013

2 400 kV twin Moose Gandhar-Hazira

line

97 01.04.2013

3 400/220 kV substation at Hazira with 2

Nos 500 MVA ICTs

- 01.04.2013

Member Secretary, WRPC informed that the data certification for EPTCL lines shall be

done on monthly basis. EPTCL shall submit the same to Member Secretary WRPC and

another to GM, WRLDC for verification of the data as per records maintained by

WRLDC and WRLDC shall forward the same with their comments to Member Secretary,

WRPC for further necessary action by WRPC.


ITEMS FROM WRLDC:

9.1 COMMISSIONING OF 2ND ICT ALONG WITH LINE AND BUS REACTORS AT 765 KV SASAN

In the 451st meeting of OCC held on 12th September 2013 representative from Sasan had informed that the tentative plan for commissioning of elements at 765 kV Sasan is as under:

• 765 kV Sasan-Satna line-1 reactor: By September 2013


• 765 kV Sasan-Satna line-2 reactor: By December 2013 • 765/400 kV ICT-2: December 2013 • 765 kV Bus-1 Reactor: January 2014 • 765 kV Bus-2 Reactor: January 2014

The 765/400 kV ICT at Sasan is loaded critically (850 – 900 MW)particularly when the Sasan unit # 3 is not available and the generation at Vindhyachal STPS is full.

Following details were requested from Reliance Sasan :

• Overload setting adopted in 1000 MVA, 765/400 kV ICT in operation • Progress of commissioning of the 2nd ICT. • Progress of commissioning of Line reactor of 765 kV Sasan-Satna lines

at Sasan end • Progress of commissioning of Bus reactors at 765 kV

Reliance Sasan have submitted the following status through e-mail:

1. ICT-2 : Ready for charging.

2. Sasan-Satna Line-1 Reactor: Work in progress, awaiting some shortfall materials from OEM - China. Expected completion by End December'13.

3. Sasan-Satna Line -2 Reactor : Cyclone damage materials during transit in Sea to be received from OEM China. Expected Work completion by Feb'14.

4. Bus Reactor: Cyclone damage materials during transit in Sea to be received from OEM China. Expected Work completion by Mar'14.


9.2 AVAILING WRLDC CONCURRENCE FOR SWITCHING OF ANY OF THE

IMPORTANT TRANSMISSION ELEMENTS IN WESTERN REGION

WRLDC informed that as per the regulation 5.2 (c) of the IEGC “No important element of the National/Regional grid shall be opened or removed from service at any time, except when specifically instructed by RLDC or with specific and prior clearance of RLDC. The list of such important grid elements on which the above stipulations apply shall be prepared by the RLDC in consultation with the concerned Users, CTU and STUs, and be available at the website of NLDC/RLDC/SLDCs...”


In line with the above provision a list of important element list was compiled in May 2013 and is available on WRLDC website at the following URL.

http://wrldc.com/docs/LIST%20OF%20IMPORTANT%20GRID%20ELEMENT

S%20in%20WR_May_2013.pdf

With the growing complexity in the grid and its associated impacts it is now desirable that concurrence of WRLDC is taken in the form of an operation code prior to switching of any of the transmission element included in the important elements of the Western Region.

Constituents noted the above and agreed to comply.

9.3 UPDATION OF THE RESTORATION PROCEDURE FOR WESTERN REGION The recovery procedure for Western Region was compiled in November 2012 in consultation with all the stakeholders. Since then significant changes have taken place in the transmission network and generation capacity in Western Regional Grid. All stakeholders are requested to forward their inputs and suggestions by 30th November 2013 to WRLDC. The draft procedure would be put up for discussion and finalization in the next OCC meeting.


9.4 ENSURING INJECTION FROM (MOUDA + IEPL + TIRODA) WITHIN 1750 MW

WRLDC informed that a meeting was convened by WRPC on 26th June 2013 for discussing the SPS for Wardha flow gate. It was decided in the meeting that the total injection by NTPC Mouda, APL Tiroda and IEPL would be limited within 1750 MW. It is being observed that the schedule issued by SLDC Maharashtra to Tiroda alone is around 1850 MW. Consequently the loading on 400 kV Warora-Chadrapur is 900-950 MW; loading on 400 kV Chandrapur-Chandrapur is 550-600 MW, loading on 400 kV Wardha-Akola D/C is 600-650 MW and loading on 400 kV Parli-Lonikhand is 500-550 MW each. The system is N-1-1 insecure and following actions are desirable from SLDC Maharashtra:

• Ensure that despatch schedule given to Tiroda as well as its injection in real-time is in line with the WRPC MoM ref. WRPC/Protection/SPS/2013-14/949 dated 27/06/2013.

• Ensure that the SPS of Tiroda is in operation • Coordinate to increase generation at South Western Maharashtra

(Koyna/Jaigad/RGPPL) to control the power flow on EHV lines in Maharashtra. MSETCL agreed to the above actions suggested by WRLDC.


9.5 SPS IMPLEMENTATION STATUS:

9.5.1 SPS for 765 kV Gwalior-Agra D/C (Generation Run back Scheme in WR)

An SPS was envisaged for ensuring backing down WR generation by 500 MW ( VSTPS - 200 MW, KSTPS - 120 MW, CGPL - 180 MW) in case of sudden reduction of NR import from WR on Bina-Gwalior-Agra link by 1500 MW. The matter was already discussed in 449th, 450th and 451st OCC and 22nd WRPC meeting. During the 451st OCC NTPC intimated that they have got the approval from their corporate centre and it was decided to implement the same within a month. Regarding CGPL Power Grid representatives confirmed that tele-link was being provided at Mundra by them. 9.5.2 SPS at APL Tiroda

WRLDC intimated that further subsequent to the synchronization of 400 kV Warora-Chandrapur-stg-II line -1, it is proposed that the logic at SPS needs to be revised as under:

In addition to above action curtailment of drawal by Maharashtra would also be required either by increasing generation on South-west Maharashtra or distress load shedding in South Maharashtra.

Contingency Desired automatic action through SPS

1 Tripping of 400 kV Warora-Chandrapur-stg-2 when the total powerflow on Wardhaflowgate plus 400 kV Warora-Chandrapur-stg-2 is more than the limit set for Wardhaflowgate.

Trip one unit of APL Tiroda

2 Tripping of either 400 kV Wardha-Parli D/C Trip one unit of APL Tiroda

3 Tripping of one ckt of 400 kV Wardha-ParliD/C and one ckt of 400 kV Wardha-Akola D/C

Trip one unit of APL Tiroda

4 Tripping of 400 kV Wardha-Akola D/C Immediate Generation backing by 260 MW on running units at Tiroda


Member Secretary, WRPC stated that a separate meeting is to be called on 18.11.2013 to resolve the above issue. Subsequently a meeting was scheduled and held on 18.11.2013 at WRLDC (minutes are enclosed at Annexure-9.4) wherein following two cases were discussed and concluded as follows:

A) 400kV Chandrapur-Warora ckt in service :

1) SLDC Maharashtra may take appropriate manual actions (such as generation pickup at Koyna, RGPPL and Parli and control generation in Wardha pocket) to relive the congestion of the corridor and load shedding in Western Maharashtra as a last resort.

2) The short term schedules shall be curtailed in the event of crossing of the margins as per the regulatory frame work.

3) Since the sensitivity of APL Tiroda generation to the Wardha flow gate is significantly low in case of Warora Chandrapur ckt in service, therefore WRLDC would suggest the factor by which the generation of APL Tiroda is required to be backed down (if it is found that the effect of backing down of generation at APL Tiroda under such condition is effective in controlling the flow through Wardha flow gate) to control incremental flow on Wardha flow gate this additional set of logic will be incorporated.

B) 400kV Chandrapur-Warora ckt out of service : 1) The SPS suggested in the 26.06.2013 meeting shall be in operation such that

in the event of tripping of Warora Chandrapur line backing down of 600MW at APL Tiroda shall be wired up. All other settings/conditions decided in the 26.06.2013 meeting shall be same.

2) In the event of tripping of Warora Chandrapur line, POWERGRID shall automatically bypass FSC on one circuit of Raipur-Wardha line.

3) This arrangement shall be implemented till the 2nd ckt of Warora Chandrapur and LILO of 2nd ckt of Chandrapur-Parli at Chandrapur-II is commissioned.

Member Secretary, WRPC further intimated that the above suggestions/modifications in the SPS of Wardha flow gate will be reviewed after synchronization of the 400kV Warora-Chandrapur ckt 2 and LILO of 2nd ckt of Chandrapur-Parli at Chandrapur-II.

Sub-Committee noted as above.


9.5.3 SPS at 4x300 MW Balco IPP The SPS at Blaco was scheduled for commissioning by Nov 2013 after commissioning of first unit of 4x300 MW Balco IPP. It was also reported that as a consequence of disconnection from Chattisgarh, a revised islanding scheme would be in place at Balco. Further as per MOM of 17th meeting of WR regarding connectivity/OA applications held on 03.01.13, Balco was asked to implement SPS to trip selected units from 4x135MW in case of load throw off of Aluminium refinery load. Balco representative intimated that SPS at Balco will be implemented at the end of November 2013.

9.5.4 Defense mechanism for high frequency The status of implementation automatic tripping of generation at KSTPS (unit-7:500 MW), VSTPS (unit-7: 500 MW), CGPL (unit-10: 830 MW), was discussed in the meeting. CGPL representative intimated that they have already implemented the tripping at CGPL unit at high frequency. NTPC representative intimated that Vindhyachal and Korba proposal sent to their corporate office for engineering approval. 9.5.5 SPS at Sipat: As discussed in 449th OCC and subsequently in the special meeting of WRPC on 3-Sep-13 at TAPS 3&4 regarding review and formulation of SPS and islanding schemes in WR grid, NTPC Sipat, ACBIL, PGCIL were requested to submit the status of implementation of the proposed SPS for reliable operation of Sipat units.

NTPC representative intimated proposal sent to their corporate office for engineering approval.


9.6 SHIFTING OF 125 MVAR SPARE REACTOR AT 400 KV ITARSI TO 400 KV

DAMOH S/S. It was decided in the 23rd WRPC meeting that the spare 125 MVAR reactor at 400/220

kV Itarsi would be shifted to 400/220 kV Damoh S/S. PGCIL, WRTS-II intimated that

the reactor had already been shifted to Damoh.



9.7 EXTENSION OF START-UP POWER FOR JP-BINA TPS In the 451stOCC, a proposal for extension of startup supply for JP Bina TPS with from

Rajghat / Medikheda HPS was discussed. SLDC-MP had stated that they would

examine the proposal and give their feedback.

Member Secretary, WRPC stated that SLDC-MP, JP Bina & WRLDC device a

appropriate scheme for start-up power at JP Bina so that the scheme be discussed in

next OCC.


9.8 APPROVED SHUTDOWN OF HVDC TALCHER-KOLAR BIPOLE FROM 10TH TO 13TH JANUARY 2014

Shut down of HVDC Talcher-Kolar Bipole has been approved in the 23rd SRPC

meeting as under:

Day HVDC Pole-1 HVDC Pole-2

10.01.2014 In Metal return Mode Under Shut down

11.01.2014 Under shut down (from 0600

hrs.)

Under shut down (continued from

previous day)

12.01.2014 Under shutdown (continued

from previous day)

Under shutdown till 1800 hrs

13.01.2014 Under shut down till 18:00 hrs In Metal return mode

SRTS-1 is mobilizing manpower of 1600-2000 people for carrying out the

maintenance of the Talcher-Kolar D/C lines and crossing of new lines over the D/C

lines. The outage of the above HVDC link would reduce the transfer capability

between the NEW grid and Southern Grid. Proposal for planned outage of other

transmission elements which would affect the transfer capability in that corridor shall

be avoided on those days. This is for kind information of all Users/Utilities in Western

Region.



ITEM NO.9.9.1 SYNCHRONIZATION OF SR- NEW GRID WRLDC intimated that as per the latest information received by them, synchronization of SR with NEW grid is to be conducted between December 22 to 27, 2013. Following points were discussed towards preparedness for smooth synchronization of SR – NEW grid .

• Testing of Frequency Response of HVDC Controllers of Chandrapur HVDC Back to back. Power Grid WRTS 1 to intimate the entire Scheme and a suitable date for conducting the same.

• The status of 765 KV S/c Raichur – Solapur transmission system and transmission elements like Line Reactor, Bus reactors required during time of synchronization.

• Readiness of 2nd circuit of 765 KV S/c Raichur – Solapur line. As per information available this line is being constructed by M/S RSTCL

• Status of installation PMUs at Sholapur required for observation of any oscillation during synchronization to be discussed .As per information available, PMU has been already installed however its communication link up to WRLDC is yet to be established. Power Grid WRTS1 to indicate the present status.

• Implementation of both instantaneous as well as time-delay SPS. The present status of installation of this SPS.

• Implementation of UF Load shedding Relay Settings from 49.2 Hz to 48.6 in 4 stages by WR Constituents as per National Power Committee.

• Shut downs of Lines and ICTs during the period 22nd to 27th of December 2013 to be avoided for smooth synchronization.

AGM, WRLDC intimated that first ckt of 765 kV Raichur-Solapur would be synchronized by December 2013 end and power transfer flow would be limited to 400MW initially whereas Second ckt of 765 kV Raichur-Solapur shall be expected to synchronized in the month of April 2014 and power would be increased gradually taking grid security in to account.

Member Secretary, WRPC intimated that Member GO&D had submitted action plan

to MOP regarding the synchronization of SR with NEW grid. Following salient

aspects are covered in action plan.

1. Implementation of recommendation of protection audit of under frequency

load shedding relays settings as per National Power Committee.

2. Installation of Special Energy Meters and PMUs at Solapur and Raichur ends


3. Design and implementation of SPS for Solapur‐Raichur 765 kV lines

4. Review of SPS for Talcher‐Kolar HVDC bipole.

5. Testing of frequency controller response of HVDC controllers of the

Chandrapur btb, Gazuwaka btb and Talchar‐Kolar HVDC bipole links.

6. PGCIL shall submit the complete action plan.

He opined that local generation should be identified for tripping of units under SPS, i.e.

for Talcher – Kolar HVDC, the generations in ER should be identified.

WRLDC proposed that the KSK & JPL generation back down shall be chosen for SPS

at Solapur‐Raichur 765 kV lines as their station have PPA’s with SR constituents.

Member Secretary, WRPC stated that KSK and JPL representatives are not present,

therefore SPS for Solapur‐Raichur 765 kV lines would be designed after consent

received from KSK and JPL. Also testing of frequency controller on Chandrapur-

Ramagundam HVDC needed to be carried out urgently and needed to be coordinated

with frequency controller of Talcher-Kolar and Jaypore-Gazuwaka HVDC lines.

He stated that synchronization of SR with NEW affects the flow gate like Wardha &

Bhilai considerably and flows on various lines of MSETCL would alter and therefore

need detailed preparation. He stated that synchronization with single 765 kV raichur-

Solapur does not comply to N-1 contingencies and it would be difficult to control flow

by three HVDC link. Tripping of any single/double pole& mis operation of SPS would

lead to wide spread disturbance. Constituents also expressed concern over single line

synchronization attempt. Member Secretary stated that concern would be

communicate to Member GO&D, CEA and NLDC.

Sub Committee noted as above. ITEM NO.9.9.2 SHUTDOWN REQUEST FOR HVDC B2B VINDHYACHAL SUBSTATION

AGM(GM), WRLDC vide letter dated 11.11.2013 intimated that they received proposal for shutdown of HVDC B2B Vindhyachal substation for overhauling of isolators for rectification of hot spot problem to avoid any contingency during upcoming winter season on 18.11.2013 to 22.11.2013. During this time HVDC Block1 will be under shutdown.

OCC Sub-Committee agreed for outage.


ITEM NO 9.10 NOT INFORMING TO SLDC KALWA REGARDING MAJOR SYSTEM OPERATION INSTRUCTIONS ISSUED BY WRLDC TO PGCIL S/S IN MAHARASHTRA.

CE, SLDC Kalwa, Maharashtra intimated vide letter dated 11.11.2013 that WRLDC

control room had instructions to PGCIL S/s in Maharashtra directly without giving any

information to SLDC Kalwa. Following two such instances which had major impact of

power flow in Maharashtra network are mentioned below :

1. On dated 10th Nov. 2013, 400 KV Parli(PG)-Pune(PG) II was taken in service at

2018 Hrs and 400 KV Parli(PG)-Pune(PG) – I was taken in service at 2151 Hrs.

Effect : Power flow on 400 KV Chakan-Lonikand and Pune(PG) – Kalwa

reversed, load on Parli-Lonikand reduced. Load on 220 KV Talegaon(PG)-

Talegaon(MS) S/C increased to 280 MW.

2. On dated 11th Nov. 2013 at about 1040 Hrs. FSC on 400 KV Raipur-Wardha

taken in sevice.

Effect : Flow on 400 KV Chandrapur-Warora ( S/C quad line ) increased from

850 MW to 1128 MW, flow on Chandrapur-II – Chandrapur-I ( S/C twin moose

line ) increased from 360 MW to 685 MW. Flow on 400 KV Raipur-Wardha D/C

increased from 950 MW to 1450 MW. APML generation reduced from 1950

MW to 1650 MW. Maharashtra over drawl increased by 300 MW.

Any switching operation in CTU network connected to Maharashtra system has major

impact on power flow and many times loading on lines become critical. Only after

enquiry with WRLDC control room by SLDC Kalwa switching events are informed. It is

informed that FSC was taken in service to improve voltages in South Maharashtra,

please note that 400 KV Solapur-Kolhapur-I, Kolhapur-Mhapusa-II, RGPPL-

Nagothane-I & RGPPL-Newkoyna-II lines were out of service in south Maharashtra.

Voltage profile could have been improved by taking these lines in service.

In integrated system any switching event in CTU network has impact on entire state

network and required to be carried out in coordination with state SLDC.

Member Secretary, WRPC stated that Item no. 9.2 & 9.10 are related to communication gap between SLDC, MSETCL & WRLDC with other. He requested WRLDC & SLDC Maharashtra to harmonize data/information


exchange and suggested to intimate each other in case of switching of elements in the State as well as ISTS grid. WRLDC and SLDC Maharashtra agreed to the above suggestion of Member Secretary.


OTHER ITEMS FROM POWER GRID

SA-1 MOU for Tapping of Auxiliary Power supply from tertiary of 400/220/33 kV Transformer in POWERGRID sub-station.

The ICTs in various POWERGRID substations having 33 kV Bushings which are

connected to AC Distribution Board through 33 kV/440 V Transformers. The Power

supply through this Transformer is tapped whenever the requirement arises.

Generally, the back up supply in event of the Auxiliary supply is provided through

DG Set. In case of failure of DG Set, power is taken from 33 kv of ICT.

In this context, it is to intimate that the 765 kV Station at Solapur is under construction

and likely to be commissioned by December end. The station will have the line

coming from Raichur in Southern Region. This will connect POWERGRID

SOUTHERN REGION and WESTERN REGION directly and the entire power system

of India will have one frequency.

Further, the Solapur sub-station would be the most important station and the failure of

AC power supply to the sub-station will affect the reliability of the station.

The MOU for tapping of power through 33 kV side of the Transformer needs to be

addressed by local MSETCL and MSDCL offices.

SLDC, MSETCL assured to look in to the matter & advised the PGCIL to consult with local Discom to short out the issue.

SA-2 Dismantling of Shunt Reactor at Aurangabad sub-station.

The clearances for shifting of Shunt Reactor from MSETCL Aurangabad sub-station to

POWERGRID, Aurangabad sub-station was approved in earlier OCCM and

accordingly the Committee has agreed to dismantle the Reactor in Akola-Aurangabad

line I which is in operation without Reactor from last two months.


PGCIL, WRTS-I representative intimated that after repeated requests MSETCL

Aurangabad is not allowing the dismantling of Reactor.

SLDC, MSETCL assured that the matter to take up with Aurangabad MSETCL S/S to resolve above issue on urgent basis.

SA-3 TESTING OF FREQUENCY CONTROLLER IN HVDC BACK TO BACK STATION AT BHADRAWATI.

WRTS-I, PGCIL intimated that as per the guidelines circulated by CEA on 30.09.2013,

the Frequency Controller in all the HVDC stations including Back to Back are to be

tested to facilitate the smooth synchronization of 765 kV Raichur-Solapur line. The

preparation for charging of Raichur –Solapur line is in full swing and the line is likely to

be commissioned by December, 2013 end.

PGCIL further intimated that as per the procedure received from the CEA, the power flow through HVDC Bhadrawati needs to be controlled between 500 to 600 MW and the frequency range shall be 49.5 HZ to 50.5 Hz.The testing is to be carried out at the earliest so that the necessary feed back is to be given to CEA well before the charging of 765 kV Raichur-Solapur line.

Member Secretary, WRPC stated that a separate meeting would be held on 19.11.2013, wherein the detailed procedure of frequency controller testing will be discussed thoroughly and testing will be carried out by involving SRPC & SRLDC on suitable date.

Subsequently a meeting was held on 19.11.2013 at WRLDC, Mumbai wherein procedure for the testing of frequency controller at HVDC BTB at Bhadravati was agreed upon The detailed procedure for the testing of frequency controller at HVDC BTB at Bhadravati on 22.11.2013 is enclosed at Annexure-SA3. WRTS-I PGCIL intimated that the test was successfully conducted on 22.11.2013(report attached at Annexure-SA31).

ITEM NO. 10: DATE AND VENUE OF NEXT OCC MEETING CGPGCL agreed to host 454th OCC meeting at suitable place in Chhattisgarh

preferably on 10th & 11th of December 2013. The exact venue date would be

communicated separately.

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

Sl.No. Organisation, Name & Designation E-mail Mobile No.

I WRPC

1 Shri S.D. Taksande, M.S. [email protected] 9820878384

2 Shri M.M. Dhakate, S.E. [email protected] 8108787778

3 Shri L.K.S. Rathore, DD [email protected] 9833371844

II MSETCL / MSEDCL/MahaGenco

4 Shri D.K. Rokade, S.E. [email protected] 9167831551

5 Shri V.D. Pande, E.E. [email protected]

6 Shri K.D. Daware, Dy.E.E. [email protected] 9619892035

7 Shri P.K. Khandare, Dy.E.E. [email protected]

III MPPTCL / MPPGCL

8 Shri Mohan Sahu, E.E. [email protected]

IV CSPTCL / CSPGCL

9 Shri R.K. Bhagwat, ACE [email protected] 9407604262

10 Shri H.S. Rajput, S.E. [email protected]

V GETCO / GVCL

11 Shri H.A. Hadwani, E.E. [email protected]

12 Shri K.G. Patel, Dy.E. [email protected]

13 Shri B.M. Shah, Dy. E. [email protected]

VI ELE.DEPT. GAO

14 Shri Babu Mathew, A.E.E. [email protected]

VII WRLDC / POWERGRID

15 Shri P.R. Wankhede, D.G.M. [email protected]

16 Shri K.Y. Deone, C.M. [email protected] 9869450224

17 Shri K. Muralikrishna, C.M. [email protected] 9869450219

18 Smt. Pushpa Seshadri, C.M. [email protected] 9869404482

LIST OF PARTICIPANTS OF 453rd OCC MEETING OF WRPC HELD ON 15.11.2013

19 Smt. Sachala Mishra, C.M. [email protected] 9869450223

20 Shri Vivek Pandey, C.M. [email protected] 9869404673

21 Shri D. Bruhananda, Mgr. [email protected] 9428504279

22 Shri Aditya P. Das, Dy. Mgr. [email protected] 9869404569

23 Shri V.B. Bhandarkar, Dy. Mgr. [email protected]

24 Shri S.W. Kolte, Dy. Mgr. [email protected] 9423072643

VIII NTPC

25 Shri Hari Nath, A.G.M. [email protected]

26 Shri S.K. Shrivastava, A.G.M. [email protected] 9425178069

27 Shri N. Vara Prasad, A.G.M. [email protected]

28 Shri M.K. Jain, D.G.M. [email protected]

29 Ms. Anita Keshkar, Mgr. [email protected] 9004497105

IX TATA Power

30 Shri Ravikant Sankhe, GM-Opn. [email protected]

31 Shri Gadave Prakash R, A.G.M. [email protected] 9223553341

X APL

32 Shri C.S. Bobade, G.M. [email protected] 8980802255

XI RGPPL

33 Shri Dhananjay Shrikhande, A.G.M. [email protected] 7588690265

XII RINFRA

34 Shri S.G. Zirpe, G.M. [email protected]

35 Shri Vijay Chavan, Mgr. [email protected] 9320167746

XIII RAILWAY

36 Shri Milind A. Pakhare, S.E. [email protected]

XIV NPCIL

37 Shri Gaurav Dubey, S.O.D [email protected]

38 Shri S. Maskey, O.S. [email protected] 9423982766

39 Shri A.P. Phadke, S.O.E [email protected] 9423081670

XV Elec.Dept. D.N.H

40 Shri H.C. Surma, Asst. Eng. [email protected]

XVI VEDANTA

41 Shri Khirod Barik, A.G.M. [email protected]

42 Shri Sangeet Sahu, Mgr. [email protected]

XVII ESSAR

43 Shri Sachidanand Bhujade, V.P. [email protected] 9909993545

44 Shri Kamlesh Garg, Jt. G.M. [email protected] 9879102849

45 Shri B.J. Saxena, Sr. Mgr. [email protected] 9879101268

XVIII TORRENT POWER LTD.

46 Shri A. B. Oza, Mgr. [email protected]

Operation

O t bOctober

1/15/2013

Highlights

20132013

453rd OCCM of WRPC, Venue: WRLDC Mumbai.

DAILY ENERGY CONSUMPTION OF WEST(2013‐14 vis‐à‐vis 2012‐13)

Energy Consumption Oct‐13 Sep‐13 Oct‐12

%p

MU/Dayp

Average 796 787 838Max 883 874 884Date 31‐Oct‐13 11‐Sep‐13 23‐Oct‐12

Apr

May Jun

Jul

Aug Sep

Oct

Nov

MONTHS ‐‐‐‐>2012‐13 2013‐14

ate 3 Oct 3 Sep 3 3 Oct

1/15/2013 453rd OCCM of WRPC, V

Max: 883 MU on 31-Oct 2Min: 691 MU on 13-Oct-2

ERN REGION)

• 40‐60 MUs consumptioconsumptioduring first fortnight of13. Due to Phailin effecconsumptioreduced to Mus on 13th

• Consumptioincreased inf i h

% Change w.r.t last month

% Change w.r.t last Year fortnight.

• Average dein Oct’13 decreased b

last month last Year

1.18 ‐5.000.94 ‐0.12~ ~ decreased b

1769 MW compared tyear.

Dec Jan

Feb

Mar

Venue: WRLDC Mumbai.

LOAD DURATION CURVE (OCT-2013)Max.demand met=39233 MW Min.demand = 26319 MW

% 20% 40% 60% 80% 100%% of Time


• Demand met is > 32GW for 60% of the t

• Max demand met =39233 MW at 19:00 31.10.13

• Min demand = 26861 MW at 17:00 hrs o13.10.13

426 MW rise in peak demand in October asdemand in October as compared to September (38807MW)


PEAK DEMAND (this month vmonth)

CATER

STATE OCT’13

GUJARAT 11357

M.P. 7937

MAHARASHTRA 16925

CHATTISGARH 3024

GOA 411

DD 266

DNH 653

321ESIL 321

WR TOTAL 39233

Figures shown are Maximums in the montRegional demand met was 426 MW more tun. restricted demand decreased by 290 M1/15/2013 453rd OCCM of WRPC, V

vis-à-vis last

ED(MW) UNRESTRICTED(MW)( ) ( )

SEPT’13 OCT’13 SEPT’13

12577 11351 12573

7558 7932 7804

16732 17291 17482

3292 3048 3314

419 425 417

262 271 262

640 658 637

340 376 337340 376 337

38807 39273 39563

th.to the month of Sept’13 and

MW.Venue: WRLDC Mumbai.

2.1 Frequency ProfileOCT’13

IEGC Band 89 19 %(49.7- 50.2 Hz) 89.19 %

> 50.2 Hz 9.80%

< 49.7 Hz 1.01%

Average freq. (Hz) 50.03Hz

Maximum inst. Freq. 50.63 (11.10.13/ 08:03:0hrs) HZ

Minimum inst. Freq. 49.28 (14.10.13 /18:11:0hrs) HZ

No. of excursions below 048.8 Hz 0

No. of excursions below 48.6 Hz 01/15/2013 453rd OCCM of WRPC, V

SEPT’13 OCT’12

89 24 % 90 39 %89.24 % 90.39 %

9.25% 6.28 %

1.51% 3.33 %

50.02Hz 49.98 Hz

00 50.62 (21.09.13/ 13:04:00 hrs) HZ

50.61 (02.10.12/06:03:hrs) HZ

00 49.21 (04.09.13 /19:19:00 hrs) HZ

49.37 (17.10.12 /18:10:00 hrs) H

0 00 0

0 0Venue: WRLDC Mumbai.

50.20.9 94 5.10.3 81.1 18.60.1 83.2 16.71 6 79 3 19 1

100

F

1.6 79.3 19.11.2 91.8 70.1 76.9 232.6 88.8 8.60.9 94.7 4.40 8 89 9 9 3

80

90

0.8 89.9 9.3t 0.8 92.9 6.3t 0.1 62.1 37.8t 0 84.7 15.3t 0.3 64.3 35.4

0 8 11 9 50

60

70

%t 0.7 87.4 11.9t 2.8 94.4 2.8t 0.3 93.8 5.9t 1.2 80.8 18t 0.31 95.48 4.21 30

40

50

Time in %

t 0.8 95.1 4.1t 0.2 97.1 2.7t 1.5 93.4 5.1t 0.1 88.4 11.5t 2.8 96.9 0.3

10

20

t 3.1 94.2 2.7t 0.7 93.9 5.4t 1.9 95 3.1t 0 92.2 7.8t 0.5 93 6.5

0

1-O

ct2-

Oct

3-O

ct4-

Oct

5-O

ct6-

Oct

7-O

ct8

Ot

89.19% in IEGC t 0.8 95.4 3.8t 2.8 96.3 0.9t 1.2 98.4 0.4

1.01 89.19 9.803.1 98.4 37.8

9.80 % > 50.2 H1.01 %

SCH Vs Actual DRAWAL vis-a-vis FrequencyChattisgarh 11.10.13

5)

ency > 50.2 for 37.2 % of time on 11.10.13

500

700

900

1100

1300

1500

MW

4

5555

5

FR

EQ

UE

NC

Y (H

z)

-500

-300

-100

100

300

500

44

4444

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

23:4

1

TIMEFREQ CSEB SCH CSEB DRWL

SCH Vs Actual DRAWAL vis-a-vis FrequencyMP 11 10 13

2500

3000M

WMP 11.10.13

5

5

5

FR

EQ

UE

NC

Y (H

z)

1500

2000

4

4

4

1000

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

23:4

1

TIMEFREQ MPSEB SCH MPSEB DRWL

4


51 2

SCH Vs Actual DRAWAL vis-a-vis FrequencyGujarat 11.10.13

49 850

50.250.450.650.8

5151.2

48.648.8

4949.249.449.649.8

0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1

0:00

0:49

1:38

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

23:4

1

TIMEFREQ GEB SCH GEB DRWL

SCH Vs Actual DRAWAL vis-a-vis FrequencyMAHARASHTRA 11 10 13

50.1

50.6

51.1

MAHARASHTRA 11.10.13

48 6

49.1

49.6

48.6

0:00

0:49

1:38

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

23:4

1

TIMEFREQ MSEB SCH MSEB DRWLVenue: WRLDC Mumbai.

SCH Vs Actual DRAWAL vis-a-vis Frequency

ency > 50.2 for 35.4 % of time on 13.10.13

700900110013001500

MW

SCH Vs Actual DRAWAL vis-a-vis FrequencyChattisgarh 13.10.13

-500-300-100100300500

7 6 5 4 0 7 6 5 4 0 9 8 7 6 5 4

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:1 0

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

23:4

1

TIMEFREQ CSEB SCH CSEB DRWL

SCH Vs Actual DRAWAL vis-a-vis FrequencyGujarat 13 10 13

3000

3500

4000

4500

5000M

W

Gujarat 13.10.13

500

1000

1500

2000

2500

0

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

23:4

1

TIMEFREQ GEB SCH GEB DRWL1/15/2013 453rd OCCM of WRPC, V

SCH Vs Actual DRAWAL vis a vis Frequency

50.250.450.650.8

5151.2

RE

QU

EN

CY

(Hz)

SCH Vs Actual DRAWAL vis-a-vis FrequencyMP 13.10.13

48.648.8

4949.249.449.649.8

50FR

0:00

0:49

1:38

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

322

:52

TIMFREQ MPSEB SCH MPSEB DRWL

SCH Vs Actual DRAWAL vis a vis Frequency

50.6

51.1

RE

QU

EN

CY

(Hz)

SCH Vs Actual DRAWAL vis-a-vis FrequencyMAHARASHTRA 13.10.13

49.1

49.6

50.1FR

48.6

0:00

0:49

1:38

2:27

3:16

4:05

4:54

5:43

6:32

7:21

8:10

8:59

9:48

10:3

711

:26

12:1

513

:04

13:5

314

:42

15:3

116

:20

17:0

917

:58

18:4

719

:36

20:2

521

:14

22:0

3

TIFREQ MSEB SCH MSEB DRWLVenue: WRLDC Mumbai.

WR Frequ

Time: 19:17 Date: 4.9.13 26 MW load shedding reported by M10

/01/2013

…14:55

5:50

20:45

11:40

2:35

17:30

8:25

23:20

14:15

5:10

20:05

11:00

1:55

16:50

7:45

22:40

13:35

4:30

19:25

10:20

1:15

16:10

7:05

g p y


ency Oct'13

Stage‐I

Stage‐II

Stage‐III

Stage‐IStage‐IIStage‐III

Stage‐IV

Stage IIIStage‐IV

MSETCL

7:05

22:00

12:55

3:50

18:45

9:40

0:35

15:30

6:25

21:20

12:15

3:10

18:05

9:00

23:55

14:50

5:45

20:40

11:35

2:30

17:25

8:20

23:15

14:10


1 3 5 7 9 11 13 15

2.2 WR NET INTER REGIONAL EXCHANGES FO

‐20

0

20

‐60

‐40

‐120

‐100

‐80

Link Sch Actual U

WR ERWR‐ER 58.27 320.99

WR‐NR -1718.20 -1837.52

WR‐SR -706 80 -706 74WR SR -706.80 -706.74

NET -2366.73 -2223.271/15/2013 453rd OCCM of WRPC, V

5 17 19 21 23 25 27 29 31SCH DRAWL

OR OCT'13

UI• Sept 2013

-124.88

171.06

-3 26

p• Schudule: ‐2417 Mus• Actual: ‐2047 Mus• UI: 370 Mus

-3.26

42.92Venue: WRLDC Mumbai.

1/15/2013 453rd OCCM of WRPC, VVenue: WRLDC Mumbai.

2.4 UFR (Stage-I) OUnder Frequency Operation for t

Occasion DateOccasion DateO

1 4/10/20131 7/10/201321 14/10/2013

F 49 28 h 14th O t 13 GETCO

1 23/10/2013

n Frequency was 49.28 hz on 14th Oct 13 . GETCO may

cted relief from WR = 2060 MW at UFR stage‐I


Operation in Oct 2013the Month October 2013. ‐ Gujarat

Time of Load ReliefTime of Load Relief(MW)Operation

9.15 15.5019.05 9.5019.10 3.0018.10 2.90

l i th ti f UFR t I

7.42 39.00

explain the operation of UFR stage‐I.


Desired UFR Operatioeme

The desired UF load sheddingThe desired UF load shedding states

) hHz) WR Gujarat MP Mah.

2 2060 580 460 805

0 2070 580 460 8100 0 0 580 60 8 0

8 2080 580 460 815

6 2100 580 465 820

espective constituents may update the pro1/15/2013 453rd OCCM of WRPC, V

on as per new

in MW for WR and individualin MW for WR and individual s/UTs

CG Goa DD DNH

150 25 10 30

150 25 15 3050 5 5 30

155 25 15 35

155 25 15 35

ogress of installation.Venue: WRLDC Mumbai.

Particulars of OCC approved outagesNumber Ca

B Outage Coordination for Oct 2013

Particulars of OCC approved outagesOutages for Oct 2013 approved during 451st OCCM

226

Reliability Consent was available for 218Outages Availed 90

Em

Op

Outages Availed 90Availed outages as % of approved 41.3% To

OCC Approved Outage Statistics for Oct 2013

87%

100%100%

50%

38% 36%

58%

40%38%30% 28%

36%

L GETCO MSETCL MPPTCL WRTS‐II WRTS‐I NSPCL NTPC SASAN TORRE

Approved Availed % age


ategory Of Outage Number Reasons

mergency Outage 42 Hot Spot, Oil leakage etc.

pportunity Outage 7 Maintenance, Insulator Replac

etc.etc.

otal 49

42 Number of Emergency Outages (Availed durin2013)120%

10

12

2013)

80%

100%

6

8

40%

60%

2

4

0%

20%

0ACBIL APL CSPTCL DB

PowerGETCO JPL MPPTCLMSETCL

ENT


s of incident Date & Time Generation/ Load Loss

/220 kV Deepnagar S/s 01‐01‐2013 03:52 Gen loss : 458 MW Bus fault on Main Bus 1 due to CT

During changeover of from Dpole ‐I & pole –II tripped pectively.

01‐10‐2013 16:28 Load Loss : 978 MWAuxiliary supply was observedpumps of pole‐1 & 2. Because ofCircuit Full Flow –Very Low” Alarm

ments of 220 KV Malanpur bstation.

01‐10‐2013 16:30 ‐220 kV Auraiya ‐malanpur ckt earoperated resulting in feeding of ttripping of other feeder from rempp g

t 220 kV Badod S/s 10‐10‐2013 20:04 ‐ Failure of220 kV Main Bus R Phas

dhipadar‐Raigarh on B‐phase pping of Budhipadar‐Korba II verload respectively.

12‐10‐2013 17:29 & 17:35

‐220 kV Korba(E)‐Raigarh tripped ooverloading of 220 kV Korba(E) ‐ Bovercurrent protection.

ents at 220 kV Amarkantakion. Unit 3 & Unit 5 of ATPS tripped.

16‐10‐2013 11:07 Gen loss : 270 MW

Earth Ground Wire of 220 KV Railon ground, which created Earth FATPS end . Hence fault was fed byelements from remote end.

Unit‐2 of Koyna ‐4 which was run

pping at Karad & Dhabolbstation.

22‐10‐2013 03:07 ‐

Unit 2 of Koyna 4 which was runresulting in rise in voltage at KarDabhol‐Newkoyna‐II,Karad‐Sholaon O/V

ts at Korba (E) substation AllOpening of in‐service Isolator res

ts at Korba (E) substation. All ed at Korba(E) substation.

22‐10‐2013 10:03 Gen Loss : 160 MW remote end on DPR protection dutripped which has resulted in com

I of Adani tripped. 25‐10‐2013 12:01 ‐Malfunctioning of Oil temperaturterminal

ts of 400 kV Chandrapur Bus‐6 of Chandrapur tripped.

27‐10‐2013 10:51 Gen loss : 436 MWAll elements connected to 400 kVoperation of GT‐7. Folowing whicParli‐Chandrapur 2 section trippe

I of Adani Tripped. 29‐10‐2013 18:10 ‐

APL, Mundra‐Mohindergarh HVDunbalance 60/61 stage‐3 trip which results t

Brief Reasons GD/GI type DR/EL Is

T burst GD‐1 Received Bus fault dueDeepnagar is fre

G to Auxiliary supply, fluctuations/dip in the 1. Auxiliary Su3‐4 times resulting in tripping of valve coolingthis the pole‐1 & 2 tripped on “Valve cooling Mainm.

GD‐1 Recieved y

2. Fluctuationanalysed

rth wire snapped. The CB at Malanpur end did not he fault to the Malanpur Bus. This resulted in

mote end.GI‐I Not Received Fault clearing t

se PT dedicated for 220 kV Kota feeder GI‐I Received

on B phase to earth fault which resulted in Buddhipadar II and III . These circuits tripped on GI‐I Not received

way Traction Feeder – I from ATPS broke and fell Fault but the breaker of faulty feeder did not trip at y 220 KV Bus – I of ATPS resulting in tripping of all GD‐1 Not Received

1. Relay was n2. Fault clearin

nning in synchronous condenser mode had trippednning in synchronous condenser mode had tripped rad and Dabhol S/S causing tripping of 400 kV apur‐S/C ,Karad‐Jaigad‐I and Nagothane‐Dabhol‐I GI‐II Received

1. Over Volarea

ulting in bus fault. Most of the lines tripped from Not received 1. No Bus b

Korba(E)ue to R phase to earth fault.220/132 kV ICTs also mplete blackout at Korba (East) S/s .

GD‐1 as not available

2. Human Erro3. Fault clearin

re tripping circuit‐1 at Mohindergarh HVDC GI‐II Received

V Bus 1 from Chandrapur due to LBB Relay ch the Chandrapur‐Chandrapur II tripped and the ed on Over voltage.

GD‐1 Received 1. MTR relay n2. Issues with

DC Pole‐2 tripped at 18:20 hrs due to DCF C1

he blocking of pole‐2 GI‐II Not Received

5 GD 1 at Deepnaga5. GD-1 at DeepnagaDetails

• 400 kV Main Bus I at Deepnagar got tripped with operationof Bus bar protection due to bursting of B phase Main Bus 1side connected CT for Station transformer 4B.

• Unit 4 and Unit 5 of Deepnagar also tripped resulting inp g pp ggeneration loss of 458 MW

Issues

• During the previous occurrence on 4th July 2013 atDeepnagar ICT 1 Main CB was kept off and since then itDeepnagar , ICT 1 Main CB was kept off and since then itseems that ICT 1 was connected to Main Bus I only via tie CB.In the two months span the problem was not corrected is ofserious concern. It reduces the advantage provided by theOne and half circuit brekaer scheme for reliability.

• Reson for keeping the Main CB of 400 kV Deepnagar‐bhusawal II need to be explained . This circuit could havebeen saved if the main CB was on.

• This is the third occurrence after the incident of 22nd Mayand 24th May at 400/220 kV Deepnagar S/s During theand 24th May at 400/220 kV Deepnagar S/s. During theprevious occurrence it was observed that severalequipment failed causing loss of generation


ar S/s Date: 01‐10‐13ar S/s Time : 03:45


5 GD 1 at Bhadrawa5. GD-1 at BhadrawaDetails

• During change over from DG‐2 to MIDC Aux. supply, the DG‐2Breaker Q92 tripped and aux. supply feeder breaker Q91closed. But the voltage fluctuations occurred in aux supplythree times in succession between 16:26:16:998hrs to16:26:49:736 hrs16:26:49:736 hrs.

• This resulted in tripping of valve cooling pumps in both pole‐1 & 2 and both poles tripped at 16:26 hrs on “Valve coolingMain Circuit Full Flow –Very Low” alarm

L d l f 978 MW• Load loss of 978 MW

Issues

• The frequent tripping of 33 kV feeders is major reason forPole tripping.

• There is an average of 10 to 12 tripping of aux. supplyfeeders per month.

• From April’13 to September’13 there are 109 trippingassociated with the MIDC and Warora Feeders (MIDC feeder(64 times and Warora feeder 45 times).

• The auxiliary feeders have tripped for 111 numbers of timesout of which HVDC poles have survived during 107 tripping1/15/2013 453rd OCCM of WRPC, V

ati HVDC Date: 01‐10‐13ati HVDC Time : 16:26


5. GD-1 at Bhadrawa5. GD 1 at Bhadrawacontd….

Such frequent Number of trippiSuch frequent Number of trippiconsidering in view the NEW grid and2014.HVDC Bhadrawati will play an importHVDC Bhadrawati will play an importin synchronized grid.The Reliable supply of Auxiliary poweM h h SLDC d MSETCL iMaharashtra SLDC and MSETCL is reand resolve the problem at earliest a33 kV feeders.PGCIL WR I i t d t fi dPGCIL WR‐I is requested to find oauxiliary supply during the changeoduring the earlier tripping. The reasosubmitted for further actionsubmitted for further action


ati HVDCati HVDC

ng of Auxiliary supply is concernng of Auxiliary supply is concernd SR grid synchronization as planned in

tant role in controlling the power flowtant role in controlling the power flow

er to HVDC is must for grid security.d ki dl l k i hquested to kindly look into the matte

ssociated with the frequent tripping o

t th f th fl t ti iout the reason for the fluctuation inover. Similar fluctuation was reportedn for the same should be analyzed and


5 GD 1 at Chandrap5. GD-1 at ChandrapDetailsDetailsNon reset of master tip relay of GT‐and other factor led to operation of LAll the Main Bus 1 equipment connecChandrapur II‐ Parli tripped on Over‐VSPS of Wardha flow gate operated anSPS of Wardha flow gate operated anssuesIssues with the cable from CT to relayIssues with the cable from CT to relayNon‐resetting of Master Trip relay afAlways takey


pur S/s Date: 27‐10‐13pur S/s Time : 10:51

‐7 ( on Main Bus 1) after taking it ouLBB protection relay for the unit.cted tripped due to LBB protection.Voltage protection.nd APML generation reducednd APML generation reduced.

y panel for LBB for GT‐7y panel for LBB for GT 7fter withdrawal of the Unit.


Commissioning of 2h Line and Bus reacannt Expected syn

date asCurrent Status(Y/N)date as

discussed in 451st OCC

Status(Y/N)

Sasan‐ Sep 2013 NSasanine‐1 r

Sep 2013 N

Sasan‐ Dec 2013 Nine‐2 r

00 kV ICT‐ Dec 2013 N

Bus‐1 r

Jan 2014 N

Bus‐2 r

Jan 2014 N


2nd ICT along ctors at 765 kV

The 765/400 kV ICT at Sasan is loaded critically (8900 MW) i l l h h S i # 3 i– 900 MW) particularly when the Sasan unit # 3 i

not available and the generation at VindhyachalSTPS is full.

1. Representative from Sasan may apprise the OCmembers on the following issues:• Overload setting adopted in 1000 MVA, 765/4Overload setting adopted in 1000 MVA, 765/4

kV ICT in operation• Progress of commissioning of the 2nd ICT. • Progress of commissioning of Line reactor of 7g g

kV Sasan‐Satna lines at Sasan end • Progress of commissioning of Bus reactors at

kV


9.2 Switching of Impog pWRLDC codeAs per the regulation 5.2 (c) of the IEGC p g ( )National/Regional grid shall be opened oexcept when specifically instructed by RLof RLDC. The list of such important grid eapply shall be prepared by the RLDC in capply shall be prepared by the RLDC in cCTU and STUs, and be available at the wIn line with the above provision a list of iMay 2013 and is available on WRLDC wehttp://wrldc.com/docs/LIST%20OF%20IM%20WR_May_2013.pdfWith the growing complexity in the grid g g p y gdesirable that concurrence of WRLDC is prior to switching of any of the transmisselements of the Western Region.


ortant Elements with

“No important element of the por removed from service at any time, LDC or with specific and prior clearance elements on which the above stipulationsconsultation with the concerned Users,consultation with the concerned Users, ebsite of NLDC/RLDC/SLDCs...”important element list was compiled in ebsite at the following URL.MPORTANT%20GRID%20ELEMENTS%20in

and its associated impacts it is now ptaken in the form of an operation code sion element included in the important


3 Up-dation of RestoWRr WR

The recovery procedure for WesternThe recovery procedure for WesternNovember 2012 in consultation with

Since then significant changes haveSince then significant changes have network and generation capacity in

All stakeholders are requested to fosuggestions by 30th November 2013

The draft procedure would be put uh OCC ithe next OCC meeting.


oration Procedure

n Region was compiled inn Region was compiled in h all the stakeholders.

taken place in the transmissiontaken place in the transmission Western Regional Grid.

rward their inputs and 3 to WRLDC.

up for discussion and finalization in


nsuring injection from (MMW

meeting was convened by WRPC on 2Wardha flow gate.

was decided in the meeting that the oda and IEPL would be limited within

Documents

Baart sarkar Government of India kond`Iya ivaVut p`aiQakrNa Central Electricity Authority piScama xao~Iya ivaVut saimait Western Regional Power Committee ef …