MOM of 3rd OCC meeting (2019-20) held on 27.06.2019 DELHI TRANSCO LIMITED (A Govt. of NCT of Delhi Undertaking) An ISO 9001:2015 certified company Office of Mgr. (T) OS-II IInd Floor, ERP centre, SLDC Minto Road, -110002 Website:-www.dtl.gov.in No. F.DTL/2019-20/DGM(OS)/F-4/36 Date:-04.07.2019

To, All Members of Operation Co-ordination committee

DTL General Manager (O&M)-I, Chairman OCC General Manager (O&M)-II General Manager (P&M, DM&S) General Manager (Planning) DGM (O&M) - North, East, West, South DGM (M/P) DGM (Plg.) SLDC ED (SLDC) DGM (SO) TPDDL HOD (PSC &AM) Sr. Manager (PSC) BRPL AVP (SO) BYPL AVP (SO) NDMC Superintending Engineer IPGCL AGM (T) Opr. GTPS PPCL AGM (T) Opr. PPS-I AGM (T) Opr. PPS-III MES AEE/M.SLDC Officer BBMB Sr. Executive Engineer, O&M DMRC Addl. GM (Elect.) GMR(DIAL) GM(DIAL) Special Invitee N. Railways Sr. DEE (TRD) Special Invitee

Sub: MOM of 3rd Delhi OCC Meeting (2019-20), held on 27.06.2019 (Thursday) at DTL, 220kV Park Street Building.

Dear sir/madam, Enclosed please find herewith the minutes of meeting of 3rd Delhi OCC meeting (2019-20), held on 27.06.2019 in the office of GM(O&M)-II, Delhi Transco Ltd., 220kV Sub-Stn Park Street, Opp. Talkatora Stadium, Near R.M.L. Hospital, New Delhi-110001. The same is also available on DTL website, www.dtl.gov.in under the tab “News and Information”-OCC Meeting Thanking You.

Yours Sincerely, sd/- (Hitesh Kumar) DGM(OS) Copy for favour of kind information to: (i)Secretary, DERC, Viniyamak Bhawan, C-Block, Shivalik, New Delhi-17 (ii)CMD, DTL (iii)Director (Operations), DTL

DGM(OS)

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MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019 DELHI TRANSCO LIMITED (Regd. Office: Shakti Sadan, Kotla Road, New Delhi-110002)

MOM OF 3rd DELHI OCC MEETING (2019-20), HELD ON 27.06.2019

Chairman, OCC welcomed all members and representatives present in the meeting. List of officers attended the meeting is enclosed as annexure.

The point-wise deliberations made in the meeting are as under:

1. Confirmation of minutes of 2nd Delhi OCC meeting (2019-20), held on dated 29.05.2019.

The 2nd Delhi OCC meeting (2019-20) was held on 29.05.2019 in accordance with the agenda circulated vide letter dt: 24.05.2019. Minutes of the aforesaid OCC meeting were issued vide letter dt.04.06.2019.The same was also uploaded on DTL website.

During deliberation, PPCL raised its concern regarding Agenda point 5.1 of OCC meeting held on 29.05.2019. After detailed discussion this agenda was referred to protection Sub-committee for further tripping/ fault analysis. However this agenda was not resolved till date. As updated by members, this agenda has not been discussed yet as the Protection Sub- committee meeting is due in first week of upcoming month & this agenda will be discussed further during the meeting.

2. DTL AGENDA:

2.1 Power evacuation plan for newly commissioned/to be commissioned DTL sub- stations and overloading of Transmission elements during the upcoming summer season.

Discoms were requested to submit the schedule for evacuation plan for upcoming summer season for newly commissioned/to be commissioned grids, i.e. R.K. Puram, Tughlakabad, Pappankalan-III and for load optimization on DTL network. The following was updated by respective DISCOM representatives: - (a) BRPL informed that the works related 66 kV Tuglakabad- phase-I & 66 kV Tuglakabad-Mohan co-operative Industrial Area Ckts. are completed & the feeders are expected to be energized at 220kV RK Puram sub-station by 30.06.2019. Above feeders will provide load relief to Okhla and Substations particularly in view of outage of one 220/66KV 100MVA Trf. at Okhla. (b) BRPL informed that the 66 kV R K Puram- B-Block ckt is energized on 26.06.2019 at 220kV RK Puram. (c) BRPL informed that the work of laying 66 kV PPK-III - G-2 ckt is about to complete & is expected to be operational by 07th July 2019. DTL pointed out that 220 kV PPK-III Substation was energized in Dec 2017. However, the energization of the above feeder got delayed which might have given load relief to PPK-I/II substations. (d) BYPL informed that 02 no. 33 kV Preet Vihar-Dwarkapuri Ckts. will be operational by Dec-2019.

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MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019 OCC requested all DISCOMs to expedite for early completion of all pending projects to provide load relief at over loaded substation such as 220kV Okhla, Mehrauli, PPK-I, , Kanjhawala, Rohini-I, Shalimarbagh, & Park Street etc. OCC advised Planning deptt. DTL to take up the matter with Discoms in steering committee meeting to optimize the load at subjected under-loaded sub-stations in line with above. Discoms to put all out efforts for optimum loading at new substations against their capacity in order to provide load relief to the over loaded Transformers &old substations. OCC also informed that the issue for load relief to 220 kV overloaded substations & Transformers has been discussed several times in previous OCC meetings. DISCOMs were requested to complete their pending projects well in time before summer season in order to avoid load shedding. (Action by DISCOMs)

2.2 Proposed planned shutdowns of O&M, DTL for the month of July 2019.

DTL O&M deptt. has proposed the planned shutdowns for the month of July-2019. The proposed shutdowns were deliberated. Discoms raised the concern that since the Delhi peak load is expected to reach new high in the upcoming month, as such only emergency shutdowns be availed that too in early morning hours. Therefore, only emergency shutdowns were approved by the OCC during morning hours subject to real time conditions. 3. SLDC Agenda

3.1 Correction in Nomenclature of 33/66kV Feeders from 220kV DTL Sub Stations.

The matter was deliberated in the previous OCC meeting that request for any change in the nomenclature of DISCOMs 66 kV/33 kV/11 kV O/G feeders have to submitted by the concerned DISCOM in the office of GM(Planning)DTL, Jhandewalan in the desired format with all necessary supporting documents as agreed in the 3rd steering committee meeting (2018-19) held in the office of GM(Planning), DTL, Jhandewalan on dt. 06.12.2018. The updation in nomenclature will be communicated to the concerned DISCOM by GM(Planning) office. As per data available at SLDC, following are the feeders of BRPL which require name change:- S.No. DTL GRID NAME OF FEEDER 1. 220kV Mathura Road Ckt.01 and Ckt. 02 2. 220kV Lodhi Road Ckt.02 3. 220kV Lodhi Road 01 and 02 4. 220kV IP Defence Colony (Bay 24) 5. 220kV Mehrauli Ckt.01 and Ckt.02 6. 220kV Okhla Malviya Nagar Ckt.03 7. 220kV Masjid Moth Court Complex 01 and 02 8. 220kV Vasant Kunj Rigid Valley Ckt.01 and Ckt.02

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MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019 In 2nd Delhi OCC meeting (2019-20) , BRPL was advised to submit the request for change in nomenclature to DTL Planning deptt. at the earliest.

In this regard, BRPL informed that all the requisite details will be provided to DTL planning deptt. by 29.06.2019 to change the nomenclature of above feeders.

(Action by BRPL )

3.2 Survival of Local Island at GTPS/Pragati.

During 20th GCC meeting as per MoM at S.No. 2.4 (9.12) following was discussed:- “BYPL representative raised the issue of survival and subsequent synchronizing of local islanding at GT/ Pragati. GCC advised DTL to carry out a joint visit with Discoms and IPGCL/ PPCL to analyse the requirements for sustaining local island at GT station”. The matter was deliberated in the 12th (2018-19) Delhi OCC meeting held on 28.03.2019 and a committee comprising of following members was constituted for carrying out the above desired work at Pragati:- (i) Sh. Satyendra Prakash, AGM(Elect./C&I), PPS-I, PPCL (ii) Sh. Hitesh Kumar, DGM(OS), DTL (iii) Sh. B.L. Gujar, DGM(Prot.), DTL (iv) Sh. Deepak Kumar, AM(T)-Pragati, DTL OCC once again requested the committee members to visit the site & give their inputs for successful survival of local island at GTPS /Pragati. The tentative date of visit is scheduled on 05.07.2019.

(Action by committee)

3.3 Implementation of Automatic Demand Management Scheme by Discoms.

Refer S.No. 2.2 of 20th GCC MoM wherein NDMC had informed that their software for ADMS has been upgraded and under testing and work is linked with the IPDS project, for which efforts shall be made to complete at the earliest. In previous OCC meetings, NDMC reconfirmed that the work is expected to be completed by Sep-19. NDMC may update the progress if any.

None of official member from NDMC attended this meeting. Chairman, OCC shown his displeasure over absence of crucial member of Delhi-OCC committee. OCC members feel that NDMC official usually keep themselves away from this meeting which creates difficulties for the SLDC to plan load management in NDMC/ Central Delhi area.

(Action by NDMC )

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MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019 3.4 Breakdown of 220kV Maharanibagh- Masjidmoth ckts and 220kV Mahranibagh- Trauma centre ckts.

On 19.06.19, a fire incident reported in scrap under Barapullah flyover near sarai kale khan drain. The fire was in the vicinity of 220kV Cables which cause the damaged to the 220kV 220kV Maharanibagh- Masjidmoth ckts and 220kV Mahranibagh-Trauma centre ckts.

The preliminary report of SLDC for the aforesaid incident is enclosed as Annexure-I.

The damage of these four ckts leads to complete blackout of 220kV Masjid Moth substation whereas 220kV Trauma centre Station was feeded through 220kV Naraina –Ridge valley- Trauma Centre link with restriction of load.

The load of 220kV Masjidmoth was shifted by BRPL and the situation will be grim as the demand shall rise in coming days.

SLDC along with BRPL has looked in all the possibilities to shift the entire load and chalked out some feasible arrangements. The plans were discussed in DGM(SO),SLDC office on 20.06.19 and the MOM of the meeting is enclosed as Annexure-II.

The early revival of 220kV Maharanibagh- Masjid Moth ckts and 220kV Maharani Bagh- Trauma centre ckts is the need of the hour. The load management will be infeasible during high demand of Delhi.

It is also observed that NDMC officials have not adhered to the instructions issued by SLDC. This response from NDMC is creating difficulties for SLDC to shift the load from certain sub stations for appropriate load management and to relieve the constraints in certain pockets of Delhi.

As informed by O&M, DTL the management of load in above South–Delhi section is under top priority. The repairing works of above damaged U/G XLPE cables is under progress. The 220kV M.Bagh-Masjid Moth Ckt-II is expected to be energized by 30.06.2019. The remaining 03 Ckts are expected to come one by one in interval of 05-06 days. During this period, to manage the load in this section OCC requested to Discoms to shift the load from certain sub-stations.

(Action by DTL, BRPL & NDMC)

3.5 Information required by FOLD: a) Delhi has total generating capacity of 2024 MW in which 1972 MW is Gas Based Plants and 52MW is waste to Energy Plants. However data pertaining to solar/rooftop generation is not available to SLDC Delhi which may help in more informed forecasting and planning. So all Discoms are requested to provide relevant data w.r.t. solar/rooftop generation if any within their respective area. TPDDL submitted the desired data & BYPL informed that they would provide the data within a week. BRPL, NDMC & MES are requested to provide the data. (Action by Discoms) b) In recent 29th FOLD Meeting held on 14.05.2019; it was suggested that all SLDC should have data regarding type of load and its characteristics. It was also advised to all SLDC’s to segregate its load i.e. residential, commercial and industrial as it may help in forecasting demand. All Discoms were requested to give segregated data of load and its characteristics in their operational areas to SLDC Delhi. (Action by Discoms) Page 5 of 8

MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019

4. DMSWL Agenda

4.1 Tripping of Generator & Turbine at 01:32PM on 14.06.2019.

At the time of 1:32 PM on 14.06.2019, we have observed that the generator breaker has opened due to Over fluxing (V/Hz) . Following are the observations. 1. 66 KV line voltages has gradually reduced from 66kV to 21.3KV in the span of 100 milli seconds, and current in same time span was 200 A to 1700 A. 2. 11 KV line voltage of generator was reduced from 11 kv to 3.6 kv and current increases 1.5 KA to 10.5 kA (Case study)

 In this connection The clear event data for reason of tripping  At time 1.32.06.116 TIE CB tripped on 81 R df/dt  At time 1.32.06.197 SF6 CB tripped on U/V  At time 1.32.07.019 GEN CB tripped on over fluxing.(After 903 mill sec)

As per above data and reading on 14-06-2019, There was a grid disturbance in 400 KV line as informed by DSIIDC Bawana station. But the main concerned is that our generator tripped on V/Hz (Over flux protection ) and our generator made as a source to your grid feeder and feed to current 10.5 KA which should not happed to TG set . In this concerned if any fault occurs in grid we don’t know the exact reason from the station.

OCC discussed this agenda in detail with members & it was advised that DMSWL should take corrective action on their end to avoid the tripping of generator on feeder fault. In this regard OCC further advised DMSWL to go for protection audit of generator station to assess the actual reason of tripping of this generator. ,

(Action by DMSWL)

5. Long/Recent Outage/Breakdown of Elements in Delhi power system.

Members may update the latest status of following Long/Recent Outage/Breakdowns of elements in Delhi Power system as under:

Discom/ Date and S.N Element’s Name DTL Time of Status of outage as on 27.06.2019 outage 1. 33kV BUS COUPLER AT SARAI LIMB BLAST (BREAKER FAULTY). BRPL 02.01.2019 JULIENA Energized on 20.06.2019.

2. 33kV RIDGE VALLEY - 'Y' PH. SINGLE CABLE FAULTY. BRPL 31.05.2019 KHEBAR LANE CKT.-I Expected by 25.07.2019.

3. 66kV PARK STREET - RIDGE 'Y' PH. CABLE FAULTY. Expected by BRPL 01.06.2019 VALLEY CKT.-I 08.07.2019.

4. 33kV RIDGE VALLEY - SECOND CABLE FAULTY. Energized on BRPL 01.06.2019 KHEBAR LANE CKT.-I 30.06.2019. 5. 33kV BAY-7 (IP - EXHIBITION PLANNED SHUT-DOWN. Energized on BRPL 12.06.2019 GROUND-I) 24.06.2019. 6. 33kV OKHLA - ALAKHNANDA 'R', PH. SINGLE CABLE FAULTY. BRPL 10.06.2019 CKT.-II Energized on 19.06.2019.

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MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019 BOTH CABLE OF T-OFF PORTION 7. 33kV JNU-AMBIENCE MALL (T- BRPL 19.06.2019 FROM AMBIENCE MALL TO JNU OFF R.K. PURAM) CKT. FAULTY. Energized on 21.06.2019. 8. 33KV MASJID MOTH - PLANNED SHUT-DOWN. Energized on BRPL 19.06.2019 ALAKNANDA CKT 24.06.2019.

9. 66kV PALAM - 33kV PALAM 'Y & B' PH. CABLE FAULTY. Energized on BRPL 17.06.2019 CKT. 22.06.2019.

10. 33KV JNU - AMBIENCE MALL SINGLE CABLE FAULTY. Energized on BRPL 19.06.2019 CKT. 19.06.2019.

11. 66kV MUNDKA - NANGLOI 'Y' PH. CABLE FAULTY. Energized on BRPL 03.02.2019 CKT. 13.03.2019.

12. 66kV NANGLOI WATER 'R' & Ý'PH. CABLE FAULTY. Expected by BRPL 17.05.2019 WORKS-NANGLOI U/G CKT. 25.08.2019.

13. 66kV G-15 DWARKA - G-6 PPK 'Y' & B'PH. CABLE FAULTY. Expected by BRPL 31.05.2019 CKT.-I 05.07.2019. 14. UNDER BREAK DOWN. Energized on 66kV HASTAL - GGSH CKT.-I BRPL 31.05.2019 22.06.2019. 15. 33KV PEERA GARHI - 'R' & Ý'PH. CABLE FAULTY. Energized on BRPL 19.06.2019 PASCHIM PURI CKT-I 23.06.2019. 16. 33KV PEERA GARHI - 'B' PHASE SINGLE CABLE FAULTY. BRPL 20.06.2019 MADIPUR CKT. Expected by 15.07.2019.

17. 33kV DMS - TPDDL 24.05.2019 CABLE FAULTY. Energized on 26.06.2019. CKT. 18. 33kV BAY-42 (IP - NDMC 19.06.2019 CABLE FAULTY. Not energized yet. CONNAUGHT PLACE)

19. 220/66kV 160MVA PR.TR.-III AT TRANSFORMER BURNT DUE TO FIRE. DTL 26.04.2018 220kV VASANT KUNJ TO BE REPLACED. Expected by July-2019. 20. 33kV BUS COUPLER AT TRIPPING COIL PROBLEM. Expected by DTL KASHMERE GATE Dec-2019. TRIPPED ON BUCHOLZ AND 21. 220/33kV 100MVA PR. TR.-I AT DTL 03.09.2018 DIFFERENTIAL RELAY. PR. TR FAILED. 220kV RPH STN. Expected by Aug-2019. 22. 220/66kV 100MVA PR. TR.-I AT 'Y' PH. WINDING DAMAGED. PR. TR DTL 27.09.2018 220kV OKHLA STN. FAILED. Expected by July-2019. 23. - 220/33kV TR. DAMAGED. TO BE REPLACED. DTL 10.01.2019 100MVA PR.TR.-I Expected by Aug-2019. TRANSFORMER DISMANTLED AND 24. GAZIPUR:- 220/66/33kV DTL 22.03.2019 SHIFTED TO RPH FOR TR.-II. Expected by 100MVA PR.TR.-I Oct-2019. CKT. CHARGED ON ERS ON TOWER NO. 174 ON 16.04.2019 AT 19:06HRS. 25. 400kV TUGLAKABAD - DTL 12.10.2018 HOWEVER, TOWER NO. 173 ERECTION BAMNAULI CKT.-I WORK IN PROGRESS. Expected by 10th July-2019. SHUT-DOWN OF 10 DAYS DUE TO 26. GOPALPUR:-220/33kV 100MVA DTL 20.06.2019 HIGH ACETYLENE RESULTS. Energized PR. TR.-I on 28.06.2019. CABLE PORTION DAMAGED DUE TO 27. 220KV MAHARANI BAGH - FIRE INCIDENT NEAR BARAPULLA DTL 19.06.2019 MASJID MOTH CKT-I & II FLYOVER. Ckt-01 expected by 30.06.19 & Ckt-02 by 05.07.2019.

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MOM of 3rd Delhi OCC meeting (2019-20) held on 27.06.2019 CABLE PORTION DAMAGED DUE TO 28. 220KV MAHARANI BAGH - DTL 19.06.2019 FIRE INCIDENT NEAR BARAPULLA TRAUMA CENTRE CKT-I & II FLYOVER. Expected by 15.07.2019. SHUT DOWN AVAILED BY UPPCL FOR 29. 220KV NOIDA - GAZIPUR CKT. UPPTCL 12.04.2019 LILO WORK AT NOIDA SEC-20. EXPECTED BY JUNE 2019.

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