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भारत सरकार उ र क्षेतर्ीय िव ुत सिमित

18-ए, श.जीत िसह मागर्, कटवािरया सराय, नई िदल्ली- 110016

Government of India Northern Regional Power Committee

18-A, S. Jeet Singh Marg, Katwaria Sarai, New Delhi-110016

No. उ. े. िव. स./ चालन/106/01/2017/ िदनांक: 09.05.2017 सेवा म : चालन सम य उपसिमित के सद । To: Members of OCC िवषय: पर्चालन समन्वय उपसिमित की 134 व बैठक का कायर्वतृ । Subject: Minutes of 134th OCC meeting. पर्चालन समन्वय उप-सिमित की 134 व बैठक 12.04.2017 & 24.04.2017 को आयोिजत की गयी थी। उक्त बैठक का कायर्वृ उ र के्षतर्ीय िव ुत सिमित की वेब साइट http://www.nrpc.gov.in पर उपलब्ध ह ै।

134th meeting of the Operation Co-ordination sub-committee was held on 12.04.2017 & 24.04.2017. The Minutes of this meeting have been up-loaded on the NRPC web-site http://www.nrpc.gov.in.

हस्ताक्षिरत/

अधीक्षण अिभयतंा (पर्चालन)

फोन: 011- 26868681 फैक्स: 011- 26865206 ई मेल: seo-nrpc@nic.in वेबसाईट: www.nrpc.gov.in 

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Minutes for the 134thMeeting of the Operation Coordination Sub-Committee (OCC) of NRPC

134nd meeting of the Operation Coordination Sub Committee (OCC) of NRPC was held on12.4.2017 & 24.4. 2017at New Delhi.

1. Confirmation of Minutes: The Minutes of the 133rd meeting of the OCC held 15th Marchat New Delhi,& 17th March, 2017 at Lucknow were issued vide letter dated 05.04.2017. Comment from BBMB was received on agenda item No. 21. Accordingly, following sentences will be added after the last paragraph of minutes at item 21:

“  BBMB  representative  informed  that  in  line  with  approval  of  Standing 

Committee on  power  system planning,  augmentation  of  Transformer  capacity was 

done  at  Dehar  PH,  BBMB  by  commissioning  315  MVA  ICT  and  2X63  MVAR  Bus 

Reactors, by POWERGRID, under ISTS scheme for system strengthening, as approved 

in  the  30th  Standing  Committee  Meeting  on  Power  System  Planning  of  Northern 

Region held on 19th December 2011 at NRPC New Delhi. He further stated that as the 

power elements were  replaced  for system strengthening under  ISTS  scheme at 400 

KV Sub‐station BBMB Dehar, the ownership of 315 MVA ICT & 2X63 MVAR  Reactors 

shall remain with BBMB .”      

With the above amendment, OCC confirmed the minutes.

2.1 Maintenance programme for Generating Units.

The maintenance programme for Generating Units for the month of May, 2017 was discussed on 12.4.2017. The details of approved/deferred outages of generating units as per deliberations in OCC were issued vide letter no.4481-4521dated 19.4.2017.

OCC advised all the generating utilities, to timely complete all the maintenance related activities, keeping in view ensuing summer peak demand and high hydro season.

2.2 Outage programme for Transmission Elements.

The Outage programme of transmission assets for the month of May, 2017 was discussed on 12.4.2017. The details of approved/deferred outages of transmission assets as per deliberations in OCC were issued vide letter no.4481- 4521dated 19.4.2017.

OCC advised to timely complete all the transmission system maintenance related activities, keeping in view ensuing summer months, when, it would be difficult to allow shutdown.

In the OCC meeting, Power Grid brought up the issue of the requirement of additional outage in the second-third week of May, 2017, of three days, for 400kV Jhatikala- Mundka Ckt.- I and outage of one day for both the circuits of this line. They explained that the outage was required for the power tapping arrangement for Telecom.

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It was agreed to approve the outage subject to consent of DTL.

Concern was also expressed by the OCC regarding the non – restoration of 400 kV Jhatikala-Bamnauli Ckt –I, which is out since last one year. DTL informed that the ckt. would be restored by 15th May,2017.

(Action: DTL)

3. Planning of Grid Operation for April, 2017:

3.1 Anticipated Power Supply Position in Northern Region during May, 2017(As per

LGBR 2017-18) is as under:

Anticipated Power Supply Position in Northern Region during May, 2017 (As per LGBR) was discussed in the meeting. Representative of Delhi informed that for the month of May, 2017, anticipated energy requirement & availability would be 115 MU/day & 148 MU/day respectively. It was noted that most of the States would be comfortable in power supply position.

3.2 Anticipated vis-à-vis Actual Power Supply Position (Provisional) for March 2017.

SE, NRPC stated that there were much variations (i.e. > 5.0%) in the anticipated vis-à-vis actual Power Supply Position (Provisional) for the month of March, 2017 in the terms of Energy requirement for Haryana, HP, Punjab & Rajasthan and in terms of Peak demand for Delhi, Punjab, Rajasthan &UP.

The variation in anticipated (provisional) and actual energy requirement and peak demand (provisional) was discussed .

Representative of Himachal Pradesh stated that there was less demand as compared to anticipated due to unexpected weather conditions. Representative of Punjab stated that variation was due to early summer load (domestic) on account of rise in temperature. Representative of Rajasthan stated that variation was due to load reduction program implemented by their DISCOMs and reduction in agricultural load. It was noted that UP demand during the end of March was more than 16000 MW. Representative of UP stated that they were supplying more power to the rural area even during peak hours which was be the reason for such high demand.

SE, NRPC emphasized the need to improve the demand estimation taking into account weather conditions/ monsoon records for previous years and IMD forecast.

3.3 Power Supply Position:

The provisional Power Supply Position and Notified Power Cuts for the month of March, 2017 are available on CEA website.

All SLDCs were requested to furnish the provisional and final power supply position in prescribed formats by 2nd and 15th day of the month, respectively.

(Action: All SLDCs)

4. Power Supply Position for NCR:

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NCR Planning Board (NCRPB) is closely monitoring the power supply position of National Capital Region. Monthly power supply position for NCR till the month of March, 2017 is placed on NRPC website.

Members were requested to furnish the data on regular and time bound manner. (Action: All SLDCs)

5. Monitoring of schemes funded from PSDF (Agenda by NPC)

Representative of NPC detailed in the OCC that in the 6th meeting of NPC held on 19th December 2016, it was decided that all the RPCs in the monthly OCC meetings may follow up with entities to expedite completion of the scheme by giving due priority. The implementation of most of these schemes is based on the recommendation of the Enquiry Committee on Grid Disturbance of July 2012 headed by Chairperson, CEA. Therefore, timely implementation of these schemes would enhance the grid security and reliability. The updated status as brought forth by the members in the meeting is placed at Annex-II.

The concerned utilities were requested to submit the progress, physical and financial both, of implementation of these schemes on monthly basis.

(Action: All the concerned utilities; Time Line: 10th Day of every month)

6. Information about variable charges of all the generating units in the Region.

As per decision taken in 103rd OCC meeting, all generating entities are required to furnish the variable charges of their generating units on monthly basis to NRPC secretariat. It was also decided that SLDCs would submit the variable charges of the generating units located in their control area. The details of variable charges submitted by utilities from April 2016 to March, 2017are available on NRPC website.

Members were requested to submit the updated information regularly

7. Sub-stations likely to be commissioned in next 6 months.

As decided in the 108th OCC meeting, utilities were requested to submit details of substations at 220 KV and above level, likely to be commissioned within next 6 months in the prescribed format.

The latest available status of the sub-stations to be commissioned by POWERGRID NR 1&3 has been uploaded on the NRPC website.

In the meeting POWERGRID NR-2 were requested to update the status. They were requested to update the information so that the downstream network in the states could be monitored.

UPPTCL was requested to submit the status of the downstream network from the POWERGRID sub-stations including Orai & Aligarh.

RVPN updated the status regarding down-stream network from the POWERGRID sub-station in their state which is available on NRPC website however they were requested to update the commissioning dates of these substations.

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HVPNL & UPPTCL updated the status of the 220KV sub-stations to be commissioned in the next six months.

OCC advised all the members to expedite the down-stream network to ensure optimal utilisation of transmission assets and to obviate system constraints.

All utilities were requested to submit details of substations at 220 KV and above level, likely to be commissioned within next 6 months in the prescribed format in the OCC meeting

(Action: All transmission utilities; Time line: 15.05.2017)

8. Cleaning and Replacement of porcelain insulators:

The updated status as submitted by utilities regarding cleaning of insulators/replacement of porcelain insulators as available with the NRPC Sectt. has been uploaded on the NRPC website.

All the utilities were again requested to submit the detailed status of Replacement of Porcelain Insulators in respect of outages taken for the insulator replacement work during recent months.

(Action: All concerned utilities; Time line: 15.5.2017)

9. Recommendation of Enquiry committee for grid disturbances on 30th July, 2012 & 31st July, 2012:

Recommendations pertaining to operational aspects made by the Enquiry committee for grid disturbances on 30th July, 2012 & 31st July, 2012 are as under:

9.1 Healthiness of defense mechanism: Self- certification

i. It was decided in the 27th meeting of NRPC held on 30th November, 2012 that all STUs would ensure load relief as per target and settings of UFR and df/dt relays. Mock exercise for healthiness of UFRs was to be carried out by utilities themselves on quarterly basis and report was to be submitted to NRPC Secretariat and NRLDC. Further, it was decided in the 31st meeting of NRPC held on 24.7.2014 that the quarterly test report of UFR and df/dt would be uploaded on the website of respective SLDC.

All utilities were requested to maintain the healthiness of the UFR Relays in view of the upcoming summer months. Report of the UFR Testing ending March 2017 have been received from UPPTCL, PSTCL, DTL ,Himachal ,BBMB& RVPN. PTCUL was advised to submit the report.

(Action: PTCUL; Time line: 15.5.2017)

All utilities were advised to certify specifically, in the report, that all the UFRs are checked and found functional. Any discrepancy should be

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detailed upon and the timeline for rectification of the same, should also be intimated.

(Action: All STUs; Time line: At the time of submission of the self certification report)

(ii) In earlier meetings, BBMB had informed that replacement of static relays into numerical relays at 7 sub-stations (2 sub-stations in Punjab at Jamalpur &Sangrur and 5 stations in Haryana at Panipat, Dhulkot, Kurukshetra, Jagadhari & Hissar) by PSTCL and HVPNL was pending.The issue has been discussed in several OCC meetings.

HVPNL, in this meeting, intimated that the LOA for procurement of 22 UFR relays has been placed. HVPNL was advised to expedite the supplies and complete the replacement of Relays at BBMB substations.PSTCL informed that the needful action will be done positively by 30.4.2017

(Action: PSTCL; Time line: 30.04.2017 Action: HVPNL; Time line:31.07.2017)

(iii) On scrutiny of the UFR report ending June 2016, it was noted that the static type UFRs were still installed on Transformers/feeders emanating from 132KV Majra and Jwalapur Substations and 220KV Ramnagar, Roorkee and Rishikesh Substations. The matter is under discussions since many OCC meetings.

In this meeting, it was again deliberated and decided that PTCUL should expedite the work and submit the updated status and the target date for completing the work.

(Action: PTCUL; Time line: 10.05.2017)

9.2 Strengthening of Intra-State transmission system

Recommendation of the Enquiry Committee: “Intra-State transmission system needs to be planned and strengthened in a better way to avoid problems of frequent congestion.”

In the NRPC meeting held on 30th November, 2012, it was decided that SLDCs should give half yearly feedback to STU regarding bottlenecks, constraints and overloading in the State transmission network for proper transmission planning.. All SLDCs were requested to submit advice regarding constraints to their STUs, regularly at half yearly intervals i.e. on 1st January and 1st July of every year

In the 132nd OCC meeting, it was noted that all utilities had submitted the report ending December 2016. All the members were requested to submit the information regarding the action taken/action plan of the STU on the feedback given by respective SLDCs. It was also deliberated that CEA may be apprised of the SLDCs’ feedback for optimal planning of the network in the respective States.

In this meeting, it was noted that HPSEB, PSTCL had submitted the information.

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OCC advised all the SLDCs to submit the next half yearly feedback with more details in line with the feedback by NRLDC.

DTL,PTCUL& HVPNL were requested to submit the action taken/ planned by the STUs on the recommendations given by the SLDC.

(Action: DTL, HVPNL; Time Line: 10.05.2017)

9.3 Installation of adequate static and dynamic reactive power compensators.

9.3.1 Based on the studies carried out by POWERGRID for identifying compensation required in intra-State network at 220 kV level, discussions in the 29th Meeting of NRPC and subsequent discussion, reactors were to be installed at 9 locations, out of which 6 have been installed. The updated status of remaining 3 reactors are as under:

S.No.

SUBSTATION MVAR Implementation by

Updated Status in 134th OCC

1 HINDAUN 125 RVPNL Expected by 31.05.2017.

2 MANESAR 125 POWERGRID Expected by 31.08.2017

3 MERTA 125 RVPNL Expected by 30.06.2017

(Action: POWERGRID and RVPNL)

9.3.2 Study by POWERGRID for reactive compensation at 220 kV level:

The proposal for installation of bus reactors at 12 nos. 400 kV and 17 nos. 220 kV sub-stations was discussed in the 29th meeting of NRPC held on 13thSeptember 2013. After deliberations, NRPC had approved installation of reactors at 400 kV sub-stations of POWERGRID and RVPNL. As regards 220kV bus reactors, POWERGRID had stated that the requirement would be firmed up in consultation with the States. Subsequently, POWERGRID, vide email dated 30.09.2016 had submitted report of the study. In this report, reactors at 13 locations at 220 kV levels and at 24 locations at 400 kV level had been proposed. The report was discussed in 34th TCC/38th NRPC meeting held on 24th /25th October, 2016 wherein Delhi had requested to review the system study for its system. POWERGRID agreed for the same. Subject to review of requirement for Delhi, NRPC approved the report.

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In 134th OCC meeting, representative of Delhi informed that the report would be finalized within a week. Representative of Rajasthan intimated that the requirement of reactors as per the study carried out by RRVPNL and that of POWERGIRD did not match and there is a need of reconciliation. Further Rajasthan requested to recommend 13 Nos. of reactor for Western Rajasthan Region. In view of the difference in the reactor requirement coming out of the system study by States and POWERGRID, it was decided that POWERGRID and Rajasthan would refer the issue to Standing Committee on Power System Planning for NR.

(Action: POWERGRID, RRVPNL)

10. System Protection Schemes (SPSs) in Northern Region:

10.1SPS for Interruption of import by NR at 765 kV Agra (from WR).

Review of SPS for 765 kV Agra-Gwalior line

The revised SPS for contingency of 765 kV Agra-Gwalior was approved in 32nd TCC/36th NRPC meeting held on 23rd /24th December, 2015. It was also agreed in the 36th NRPC meeting that POWERGIRD would implement the revised scheme within 06 months after the receipt of the feeder details from the states.

In the 129th OCC POWERGRID stated that the scheme would be commissioned by 31.05.2017.

In the 132nd OCC meeting representative of POWERGID proposed that provision of AMC of the scheme for 05 years could also be included in the scope of the work for implementation of the revised scheme. Members agreed to the proposal of POWERGIRD.

The representative of POWERGRID further stated that the cost of implementation of revised SPS for 765KV Agra-Gwalior lines could be booked in any ongoing project/ work of Northern Region. SE (O), NRPC stated that the same had already been recommended by OCC in its 129th OCC meeting. POWERGRID representative informed that they were waiting for NRPC approval in this regard. After detailed deliberation it was decided that keeping in view urgency of the work, POWERGRID should carry out tendering activities for timely implementation of the revised scheme. The recommendation of the OCC would be put up for concurrence of NRPC in next meeting.

Representative of POWERGRID stated that it may not be possible to adhere to the commissioning schedule agreed in 129th OCC meeting. Members were of the opinion that in view of the criticality of the scheme POWERGRID should strive to complete the commissioning of the scheme.

In 133rd OCC meeting, POWERGRID representative stated that tendering activities were in process. The POWERGRID representative submitted that as the tendering process takes time, the implementation would be done till

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August/September 2017. NRLDC representative stated that all out efforts should be made to complete the work before Paddy season, as per earlier schedule of implementation.

In 134th OCC meeting, representative of POWERGRID informed that NIT would be issued on 01.05.2017 and the scheme would be completed by October,17

(Action: POWERGRID)

In the 133rdOCC meeting, it was noted that there was no progress regarding mapping of feeders, identified for the SPS load relief, in SCADA.

OCC advised all concerned utilities to take action in this regard at the earliest and inform the action taken/Action Plan. However none of the concerned STUs have submitted the action plan in this regard. STUs were requested to submit the action taken/action plan at he earliest.

(Action: UPPTCL, DTL, HVPNL, PSTCL, RRVPNL)

UP representative raised issue of DTPC defect at Muzaffarnagar. POWERGRID representative stated that the issue would be looked into and would be resolved shortly.

POWERGRID representative informed that the issue will be resolved by 15.05.2017.

(Action: POWERGRID)

10.2 SPS for ICTs at 765 kV Unnao sub-station:

A discussion was held on 06.05.2015 in NRPC secretariat with the officers from UPRVUNL in the presence of officers from NRLDC, POWERGRID and NRPC sect. UPRVUNL was briefed about the basic philosophy along with the hardware requirement of the System Protection Scheme (SPS) for evacuation of Anpara-D generation. It was agreed that UPRVUNL along with UP SLDC would prepare the SPS for safe power evacuation of Anpara-D. Further the scheme would be submitted to the OCC for approval. Thereafter, the matter was under discussion in various OCC meetings without much progress.

As decided in the 121st OCC meeting, the scheme was to be implemented by UPPTCL.

In 34th TCC/38th NRPC meeting held on 24th /25th October, 2016 UPPTCL informed that LOA would be placed on 25.10.2016 and scheme would be implemented in 03 months thereafter.

In the 133rd OCC meeting, representative of UPPTCL informed that the scheme will be implemented by 15.04.2017.

In 134th OCC meeting, it was informed by the representative of UPPTCL that the implementation of the scheme will be done by 31.05.2017.

(Action: UPPTCL)

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10.3 SPS for Kawai-Kalisindh-Chhabra generation complex:

SPS for Kawai-Kalisindh-Chhabra generation complex recommended in 122nd OCC meeting held on 22nd April, 2016. RVPNL, vide email dated 26.07.2016 has confirmed that the SPS for Kawai-Kalisindh-Chhabra generation complex has been put into operation. However, it is understood that the automatic load shedding recommended in part (c) of the scheme has not been implemented by RRVPNL. The scheme was discussed in 34th TCC/38th NRPC meeting held on 24th/25th October, 2016 wherein RRVPNL stated that feeders have been identified and the scheme would be completed by March 2017.

In the 129th OCC representative of Rajasthan intimated that, the part of the scheme related to load shedding would be completed by March, 2017.

In 131st OCC, representative of RVPNL intimated that load shedding part of the scheme has been installed on trial basis for 100MW load. Mock testing of the SPS would be done for the shortlisted load and if successful the scheme would be extended for complete 700 MW load.

OCC had advised RVPNL to implement the SPS scheme for the identified load at the earliest and submit the report to NRLDC and NRPC Secretariat.

In 133rd OCC meeting, representative of RVPNL submitted that the administrative approval for implementation of the Automatic Load shedding for identified feeders have been obtained and the NIT for the work would be floated soon.

Also regarding revision in SPS scheme after commissioning of Chhabra stage - II (Unit 5), RVPNL representative stated that the same is under consideration and information in this regard would be submitted shortly.

In 134th meeting representative of RRVPNL intimated that the scheme has been revised due to the commissioning of Chhabra stage – II. On the query regarding quantum of backing down of generation with N-1 contingency of 400 kV Kwai-Anta ckt.- 1 & 2 and 765 kV Anta-Phagi ckt.- 1 & 2, representative of RRVPNL intimated that generation will be reduced to 65 % of the installed capacity.

OCC suggested RRVPNL that the reduction in generation up to 60 % of the installed capacity in the above mentioned contingency may be considered. RRVPNL agreed to review the scheme.

(Action :RRVPNL; Time line: 15.05.2017)

11. System Study for Capacitor Requirement in Northern Region for the year 2016-17 and 2017-18.

The matter was discussed in 34th TCC and 38th RPC meetings, held on 24th & 25th Oct, 2016. It was decided that LOA should not be cancelled and the study should be carried out for the year 2017-18 and 2018-19 through CPRI. It was also decided that all the states would submit the data by 31.10.2016 for carrying out

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study for the period 2017-18. Subsequently, the data would be submitted for carrying out study for 2018-19.

In 133rd OCC meeting it was apprised that data for 2017-18 had been received from all the utilities and the same was already sent to CPRI. It was also informed that CPRI had sought some clarification regarding UPPTCL data, due to which CPRI could not carry out study. UPPTCL did not submit the clarifications on time. Considering inordinate delay in submission of the data,CPRI was asked to carry out the study, based on available information.

CPRI has submitted the report for 2017-18 and same is available on nrpc website (www.nrpc.gov.in).

OCC recommended the proposal of Haryana, Punjab and U.P. (MVVNL) for PSDF funding as the proposed Capacitor for PSDF funding is less than the recommendation of capacitor in CPRI report. For J&K, the capacitors proposed (2470 MVAR) for PSDF funding is higher than that assessed based on the CPRI study (1102 MVAR). OCC recommended the proposal of J&K limited to the capacitor requirement based on CPRI study i.e. 1102 MVAR.

Representative of RRVPNL, UPPTCL stated that the study needs to be reviewed. SE, NRPC stated that members may submit their comment on the study of capacitor requirement so that same could be discussed with CPRI.

(Action: All utilities; Time line 10.05.2017)

The data for the capacitor Study for 2018-19 has been submitted by all the states and same has been sent to CPRI.

12. Status of data trough Automatic Meter Reading (AMR)

In the 13th NRPC meeting held on 27th June 2009, scheme of Automatic Meter Reading from Interface Meters in Northern Region was approved. He added that in last OCC meeting, it was decided that NRLDC and POWERGRID would submit the joint status report of AMR at the end of every month.

In the 34th TCC meeting, held on 24th Oct, 2016, NRLDC stated that out of 1235 interface meters, data from 973 meters was being received. Further, Site Acceptance Test (SAT) was completed and data through AMR was being regularly used by NRLDC for 764 interface meters. POWERGRID informed that the data from all the meters will be available by January 2017. TCC and NRPC expressed concern over tardy progress of the implementation of AMR.

The issue is being discussed regularly in OCC meetings.

In the 134th OCC meeting, representative of POWERGRID raised their concern over lack of support from site in matters regarding AMR implementation. He informed that site personnel are downloading SEM data manually by removing wiring and in many case not plugging it in, despite of provision for downloading the data manually even when meter is plugged in. The issue has also been communicated to the site, but still not resolved.

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POWERGRID was requested to send a procedure for the same to all concerned utilities to avoid such incidences.

( Action: POWERGRID; Time line: 10.05.2017) All utilities were requested to keep the meters in required working condition for AMR.

( Action: All transmission and generation Utilities; Time line: Immediate)

13. Planning, procurement and deployment of Emergency Restoration System.

The issue was discussed in the 33rd meeting of NRPC held on 11.11.2014 and it was suggested that CEA should evolve guidelines regarding ERS. Later, Secretary (Power), GoI vide letter dated 05.12.2014 addressed to Chief Secretaries of all the states had requested to issue directions to transmission utilities / transmission licensees to procure adequate number of Emergency Restoration Systems. The guidelines formulated by CEA for planning, procurement and deployment of Emergency Restoration System were also enclosed with that letter. Copy of the aforesaid letter was enclosed as Annexure-VIII to the agenda notes of 30th TCC & 34th NRPC meetings held on 19th & 20th March, 2015.

The matter was discussed in 34th TCC and 38th RPC meetings, held on 24th & 25th Oct, 2016.

The latest status as updated by the members in 134th meeting is as under:

DTL:-Order had been placed for 02 nos. of ERS. Supply expected by 15th June, 2017.

PSTCL: -Order has been placed. Supply expected by October, 2017.

UPPTCL:-Order for 02 nos. of ERS has been placed.1 No. has been received.

RRVPNL:-Proposal pending with management.

HVPNL:-In place of ERS, spare towers would be procured. PO issued inthis regard.

PTCUL-NIT placed. Will be received by 31.10.2017. Supply expected in 3 month.

HPSEBL – No progress.

BBMB:-Partner states have agreed to provide the ERS as and when required by BBMB.

14. Targets fixed for Load Relief from operation of df/dt& UFR relays in Punjab – Review thereof

This agenda item was brought in the 127th OCC meeting by PSTCL. In short, PSTCL had contended that variation in their load from summer to winter was such that they

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were not in a position to meet targets of automatic load shedding under UFR, df/dt and SPS.

In the 127th OCC meeting, it was informed that the issue was deliberated in 5th NPC meeting held on 05.04.2016 wherein it was decided that it would suffice if NR as a whole is able to meet the desired load relief. It was decided that to work out the same, a format would be circulated to submit the load data of the feeders where UFR based load shedding scheme have been installed. For submission of data two typical scenarios of July and January were to be taken. Accordingly, the format was finalized and SLDCs were requested to furnish the information regarding automatic load shedding under UFR scheme in the prescribed. The format was enclosed at Annex – XII of the minutes of 127th OCCmeeting

The matter was under discussion in OCC meetings. It was noted that PSTCL has submitted the data whereas other utilities were asked to submit the requisite data.

In this meeting, it was again noted that Punjab, Haryana, Rajasthan and Himachal had submitted the information. The remaining utilities were requested to expedite the submission of the data positively by 10.5.2017 as the matter is already over delayed.

(Action: DTL, UPPTCL, PTCUL; Time line:10.5.2017)

15. Transmission System Outage planning Software up- gradation In the 130th OCC meeting, SE, NRPC stated that NRPC Secretariat was in the process of upgrading the Transmission System Outage Planning (TSOP) Software. The existing data was uploaded on the websitehtpp://www.nrpc.gov.in/meetings/OCC/Transmission lines.pdf. All utilities were requested to review the data and inform the NRPC Secretariat regarding any discrepancy or any addition in the data. It was also informed that the list of substations in NR System as received from NRLDC had been uploaded on the NRPC website at htpp://www.nrpc.gov.in/meetings/OCC/List of substations NR.pdf. All the utilities concerned were requested that the details of the elements e.g. ICT, Bus and Reactors in these substations may be provided to this office so that these elements can be included in the TSOP software. All utilities were requested to ensure that the updated data is submitted in all respects if already not immediately. It was also deliberated that if data is not provided by the utility, then OCC would not discuss the outage.

(Action: All Transmission Utilities; Time line: Immediate)

16. Certification of Non-ISTS line for inclusion in PoC Charges

SE, NRPC stated that as per the Central Electricity Regulatory Commission (Sharing of Inter State Transmission Charges and Losses) (Third Amendment) Regulations, 2015 RPC Secretariat, in consultation with RLDC, using WebNet Software would examine the proposal for Certification of non-ISTS lines carrying inter-State power.

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Accordingly, it was decided in 31st TCC/35th NRPC meeting held on 08th /09th July, 2015 to constitute a group to recommend a methodology for the study to be conducted by NRPC Secretariat, in consultation with RLDC. Based on the methodology suggested by the group, the study is to be carried out every year for certification. The study for certification of the non-ISTS lines for 2017-18 was carried out for UP, Haryana and Rajasthan, based on the information submitted by the respective utilities. OCC had recommended following transmission lines, for certification as ISTS for the current Financial Year 2017-18 :

S. No.

Name of Transmission Line Owner STU

1. 220KV PGCIL Panchgaon-Mau D/C line HVPNL 2. 400KV NTPC Jharli-Daultabad D/C line HVPNL 3. 400KV Sec-72 PGCIL-Daultabad D/C line HVPNL 4. 400KV CLP(Jhajjar)-Dhanonda D/C line HVPNL 5. 400kV S/C Jodhpur-Merta Line-I RVPN 6. 400kV S/C Jodhpur-Merta Line-II RVPN 7. 400kV S/C Merta - Ratangarh Line RVPN 8. 400kV S/C Merta - Heerapura Line RVPN 9. 220kV D/C Aau – Baithwasia Line RVPN 10. 220kV D/C Baithwasia – Bhawad Line RVPN 11. 220kV D/C Badisid- Aau Line RVPN 12. 220kV S/C Bhadla- Bap Line RVPN

The complete list of transmission lines submitted by STU can be sub-divided in following categories: (i) Transmission lines, which fulfill the criteria recommended by the Group

and hence are recommended to be certified as ISTS. (ii) Transmission lines, which do not fulfill the criteria recommended by the

Group and hence may not be certified as ISTS. (iii) The lines, which were claimed to be used for inter-state transmission by

STUs but were not modeled in the PoC transmission charge calculation and hence exercise to see whether or not these lines carry inter-state power could not be carried out. It may be mentioned that the responsibility to submit the requisite details for modelling the lines in PoC transmission charge study rests with STU concerned.

(iv) The transmission lines which are natural inter-state lines and hence need not be certified as ISTS.

(v) Transmission line under construction and hence considered for studies. (vi) Transmission lines which need not be certified as ISTS by NRPC. The complete category wise list of transmission lines submitted by STUs is enclosed at Annex-III

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Representative of HPPC stated that they want to withdraw the line at Sr. No 2, 3 and 4 in the above table from being included in PoC Charges. MS, NRPC stated that as per regulation the list of lines for inclusion were submitted by STUs and same can be withdrawn only on the request of HVPNL. HPPC was advised to raise the issue with HVPNL.

17. Review of Grid Operations for last month (March, 2017):NRLDC may make presentation.

Representative of NRLDC made a presentation on grid operation during March, 2017 and highlighted the following:-

o Frequency remained within the normal band 73.55% of the time during March, 2017 which is better than last year during same month (March, 2016) when frequency (within normal band) remained 70.09 % of the time. Utilities were requested to take necessary action to further improve the frequency regime viz. staggering of load at hourly boundaries, primary response from the generators etc.

o Peak demand met, average demand met and minimum demand met for the region during March, 2017 was 45913MW, 35601 MW and 23615 MW respectively. The maximum and minimum frequencies were 50.27 Hz and 49.70 Hz respectively.

o Maximum deviation was observed in Himachal Pradesh, UP, Rajasthan, Punjab followed by Haryana during March, 2017.

o Average consumption of the Region for March, 2017 increased by 8.69%(68.6 MU/day) of corresponding month in previous year.

o Average Thermal generation in March, 2017 decreased by 5.33% (26.5MU/Day) of corresponding month in previous year.

o Average Hydro generation in March, 2017 increased by 5.75%(7MU/Day) of corresponding month in previous year.

o Average nuclear generation in March, 2017increased by 2.37 MU/day as compared to corresponding month in previous year.

o Net Average Inter-Regional import increased by 17.22 MU/day during March, 2017 as compared to corresponding month in previous year.

o Net Average Import from WR decreased by 16.05 MU/dayduringMarch, 2017 as compared to corresponding month in previous year.

o Net Average Import from ER increased by 40.92 MU/day during March, 2017 as compared to corresponding month in previous year.

o Net Average Export to NER was 07.00 MU/day during March, 2017. o Total availability during March, 2017 increased by 59.91 MU/day as

compared to corresponding month in previous year. o Total outages during March, 2017 were 672 including Planned

Shutdown (389) and Forced outage (Trippings-163+Emergency Shutdown-120 = 283).

o Different 765/400 kV Transmission lines (Total 144 feeders) were manually opened/ tripped (888 times) on high voltage conditions during March, 2017.

o The difference between data, received from SCADA and SEM in terms of %age was shown as Punjab (4.27), Rajasthan (2.05), Delhi (0.79), Uttrakhand (1.29), UP (0.15) & UT Chandigarh (1.81).

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18. Outlook on summer scenario: Plan and actions ( Agenda by NRLDC): Representative of NRLDC inform that Northern Region load has started following increasing trend with the rise in temperatures in northern part of country. Demand of northern region would further grow in coming days as temperature increases further and therefore it is necessary to take care of the important issues e.g. Load forecast along with weather monitoring, load generation balancing planning by state control areas, voltage & frequency within the band, preventive actions in case of thunder storm/sudden rainfall/load crash etc., maintenance of reserve in case generation outage / hydro outage on silt etc.to maintain the grid discipline during high demand period. He further inform that these issues have been discussed in detail during 131st, 132nd, 133rd OCC meetings with OCC agreeing for requisite plan and actions based on past observations. Monitoring of planning, respective action taken and feedback is important and all entities shall present their preparedness and OCC may like to discuss/give suggestions accordingly for further improvement in the preparations. Following could be the template for presenting the preparation:

S.No. Summer Preparedness

Plan Actions

1 Load generation balance

Forecasted load and Generation availability

Share the planning for the likely portfolio management/arrangement (STOA/PX/others). Till now average energy requirements for month are being monitored but planning for maximum energy consumption on a day is also important.

2 Load forecast on daily/weekly basis

Weather monitoring (IMD website dedicated to Northern region)/ Software for load forecast/Data correlation with weather, events etc.

Share the load forecasting status and plan for the preventive action in case of any weather alert/events

3 Thunder storm Monitoring of weather and plan to sensitize the affected station/nodes Plan load generation accordingly List of 11kV feeder that can remain connected on such eventualities

Plan for: Load generation balancing

management Avoiding manual opening of feeder. As per CEA/MoP guideline,

maintaining at least 2 no’s of ERS by each state control area

4 Sudden generation outage

Plan for big generating units outage/Hydro outage on silt

Maintenance of reserves in line with CERC orders as well as for likely scenario.

5 Outage of hydro generation

Tools for silt forecasting Staggering unit stoppage (as per protocol in case of tandem units) as well as low ramp reduction of generation.

6 Reliability Study state control area import capability as per the summer

States shall present their import capability with observed constraints.

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scenario load generation balance and existing network. NRLDC has shared the TTC/ATC of all the state control area of NR enclosed in Annex-I.

Share the action plans to mitigate those constraints. Share the action plans in respect of any network arrangements for load management.

7 Reactive power management

Update all the information regarding capacitor/reactor (Bus/Line/switchable), Simulation studies for tap optimization, past trend of reactive absorption/Injection based on RPC REA

Switching on capacitor as per requirements, Tap optimization based on 220kV or below ICTs HV/LV scatter plots, monitoring of generator response in absorbing/injection of reactive power, synchronous condenser operation readiness as per system requirements.

Members were advised to make the presentation in line with the above template in the next OCC meeting.

19. Feeders for physical regulation: In line with IEGC and as per direction in Hon’ble CERC order in petition no. 125/MP/2012, the list of radial feeders which can be opened based on the direction of NRLDC(in addition to action by SLDC) to regulate demand has been provided by respective utilities and is part of “Operating Procedure of Northern Region‟. In view of continuous network change and high demand period during summer, it is desirable to have updated list of feeders.Follwing are the attributes for such feeders:

Feeders should be radial in nature Feeders should usually have substantial load flow so that effective

change can be experienced on opening of such lines.

The list of such feeders was presented in the meeting. Few constituents also expressed the changes in the list of feeders. SLDCs were requested to review and update such list of feeders in respect of their control area and provide the updated list by 15th May 2017.

20. Under-drawal by Uttar Pradesh state control area It has been observed that on 9th/10th April 2017, Uttar Pradesh has been under drawing in range of ~ 2 GW for longer period of time from the Grid. The plot is shown below.

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The under-drawal continued for extended period of time despite repeated requests from NRLDC. The internal generation within UP was also significantly high in comparison to its load (which was in the range of 6000 MW only). The weather as per IMD forecast was also normal and such heavy under-drawal was not attributable to any significant event.

Representative of SLDC, Uttar Pradesh stated that due to thunderstorm on 10th April 2017, load reduction occurred in the state. Representative of NRLDC advised SLDC-UP to take measures to manage such inclement weather conditions by improving on aspects like forecasting, demand management, manual opening of feeders.

( Action : UP, SLDC; Time line: Immediate)

21. HVDC Kurukshetra-Champa: filter bank switching logic on Transient over voltage (ToV) ±500kV HVDC Kurukshetra-Champa Pole-I (1500 MW) has been commissioned in Mar’2017. Associated transmission line in NR i.e. 400kV Kurukshetra-Malerkotla D/C, 400kV Kurukshetra-Abdullapur D/C, 400kV Kurukshetra-Sonepat D/C, 400kV Kurukshetra-Jallandhar S/C, 400kV Amritsar-Malerkotla D/C & 400kV Kurukshetra-Nakodar S/C has also been synchronized.

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During trial operation of HVDC, many tripping at high voltage were observed due to filter bank switching operations. It has been discussed during past OCC meetings also. Recently on 5th April 2017, 0747 hrs, one filter bank switched out at Kurukshetra on ToV which caused power order to reduced from 600 MW to 330 MW. At 0757 hrs, one more filter bank switched out which further reduces power order to 240 MW. Further at 0855 hrs, one filter bank switched in and leads to increase the power order to 330 MW.

Representative of POWERGRID informed that, seeing the HVAC side bus voltage, TOV stage -1 protection operates based on the following settings:

TOV Operation Stages (1 pu=400kV) set time in seco/v stage 1 1.085 (434 kV) 3 o/v stage 2 1.18 2.5 o/v stage 3 1.32 0.2 o/v stage 4 1.51 0.05

TOV operation results in switching out of a filter and corresponding reduction in Power Order. The switched out filter will remain out for 5 minutes unless there is a manual intervention i.e. it will again come into service after 5 minutes unless it is switched to manual mode with corresponding increase in power order.

In manual mode, filter is put out of auto mode so that it will not come into service again and then power order is freezed/fixed at that level.

As a precautionary measure, a Dead Bank has been fixed between 429 to 432kV in which no filter switching will take place. The OEM, has been asked to develop the scheme so as to fix automatically the power order when any filter is switched out due to operation of ToV. Filter will be put into manual mode and after monitoring the voltage and grid conditions new power order and filter switching will be done as per the instruction of RLDC.

Concerns were raised over such automatic switching of filter and corresponding change in power order. In case of high voltage, if HVDC filter goes out and automatic reduction in power order takes place. If in this condition, after 5 minutes, filter would automatically switch in, it may result in further increase in voltage which would be undesirable.

POWERGRID was advised for setting ToV so as to take care of the above concerns.

( Action: POWERGRID; Time line : 10.05.2017)

22. Submission of Dynamic data of generators for System Studies:

Representative of NRLDC stated that importance of dynamic data for simulation studies of generator/angle separation/oscillation/stability study

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etc. has been discussed in numbers of previous OCC/TCC meetings. During the workshop organized by NRPC on PSS tuning, all the entities agreed to submit the dynamic data. The dynamic data of generating units constitute mainly model and their data for generator, Exciter, Governor, and Stabilizer. The formats, model of these data were presented in the OCC and are also available on NRPC website. It is also to note that PSS/e software uses standard IEEE models and therefore it is entities shall also mention the model name of generating units/governor/exciter/stabilizer. In case, the matching standard model is unavailable, utilities shall provide the user defined model along with all the requisite data. Status of dynamic data available at NRLDC was provided and attached with the Agenda point. Constituents were asked to provide all the remaining dynamic data at the earliest so as to formulate and validated the PSS/e base case.

23. Updating documents in line with Indian Electricity Grid Code (IEGC):

In line with IEGC, NRLDC is updating the document, “Important grid element of Northern region”, “Operating procedure of Northern region” and “Power Maps of Northern region and related information”. Important Grid element and operating procedures are available at NRLDC website. For quick reference, some of information required for both the documents is as:

I. Important Grid element of Northern region: Transmission Element added from April’16 to 15th April 2017 as per format

a. Line, ICTs, Bus reactor, line reactor at 400kV and above b. ISTS and tie line at 220kV and below c. FSC, TCSC, SVC details d. Generating units > 100 MW

II. Operating procedure

a. Feedback or modification required as per the updated CERC/CEA/other provisions.

III. Power Map of Northern Region and related information

a. Updated Maps of States. b. Information in the formats attached at Annexure of Agenda. The

respective information may also be sent to nrldcso2@posoco.in/ nrldcso2@gmail.com.

Constituents were advised to provide the above details by 15th May 2017.

24. Multiple element tripping events in Northern region in the month of March-2017:

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NRLDC representative informed that a total of 17 grid events occurred since last OCC meeting. Out of these, 6 no. of events were of GD-1 category. The preliminary report of all the events have been issued from NRLDC. A list of all these events along with the status of details received was attached at Annexure-A of the Agenda.

OCC discussed and requested concerned utilities that they should take expeditious actions to avoid such tripping in future. Further, all the concerned utilities were requested to provide the DR/EL & Detailed Report of the events in line with the IEGC grid code and CEA Grid Standards.

(Action: UPPTCL, DTL, HVPNL, APCPL, POWERGRID, SJVNL, JSW (Karcham), PTCUL, BBMB, NTPC, RVPNL; Time frame: Immediate)

25. Details of tripping of Inter-Regional lines from Northern Region for March’17:

NRLDC representative informed that a total of nine inter-regional lines tripping occurred in the month Mar’17. The list was attached at Annexure-B of Agenda. He added that as per regulations, all the utilities should furnish the DR/EL, flag details & preliminary report to RLDC/RPC within 24hrs of the event. They should also furnish the detailed investigation report within 7 days of the event, if fault clearance time is higher than mandated by CEA (Grid Standard) Regulations. It was noted that all information regarding the tripping was not received from the utilities. Further, as per the PMU data and the details provided by Rajasthan, it was observed that the Auto-reclosing of 220kV Badod-Sakatpura didn’t operate. OCC requested all the concerned utilities for taking corrective action to avoidsuch tripping as well as timely submission of the information. Rajasthan was requested to look into the non auto-reclosing of 220kV Badod-Sakatpura line and inform the remedial actions taken.

(Action: RRVPNL, POWERGRID, APL; Time frame: Immediate)

26. Frequency response characteristic:

NRLDC representative informed that three FRC based events havebeen occurred since last OCC meeting. The FRC has been computed by NRLDC as well as request was sent to state control areas along with other regional entities to compute the same at their end. Description of the events is as given below:

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S. No. 

Event Date 

Time (in hrs) 

Event Description Starting 

Frequency  (in Hz) 

End Frequenc

y  (in Hz) 

Δf 

1  03‐Apr‐17  13:18 Yermarus Thermal Power Station(YTPS) Unit‐II generating 800MW infirm power Tripped 

49.99  49.92  ‐0.07 

2  09‐Apr‐17  18:49 All  400/220  kV  ICTs  tripped  at Biharshariff  resulting  load  loss  in downstream network. 

50.02  50.12  0.10 

3  13‐Apr‐17  09:36 Due  to  tripping  of  Karad&  Kolhapur ICT's,  the  Load  loss  of  1840 MW  took place. 

50.01  50.2  0.19 

Information was received from NHPC and Uttar Pradesh only. Keeping in mind the continuous poor frequency response observed, a more focused one-on-one iteration on FRC related issues through Video Conferencing between constituents and NRLDC was proposed. The schedule for the above interaction through VC is as below:

S. No.  SLDC  Participating Generators  (in addition to other State control area 

generators and SLDC) 

Date 

1  Punjab  Rajpura, Talwandi Sabo, GVK‐Goindwal Sahib, Dehar, Pong, Bhakra, Kotla, Ganguwal 

02.05.2017

2  Haryana  APCPL‐Jhajjar, Faridabad Gas 09.05.2017

3  Delhi  Dadri stage‐1&2, Dadri Gas, Bawana CCGT, Badarpur 

16.05.2017

4  Uttar Pradesh  Singrauli, Rihand Stage‐1,2&3, Unchahar stage‐1,2&3, Tanda, Auraiya Gas, Vishnuprayag, Alaknanda, Anpara‐C, Anpara‐D, Roza, Lalitpur, Bara 

23.05.2017

5  Rajasthan  Kawai, Sh. Cement, Rajwest, VSLPP, Barsinghsar  30.05.2017

6  Uttarakhand  Dhauliganga, Tehri, Koteshwar, Gamma Infra  06.06.2017

8  Himachal Pradesh  Jhakri, Rampur, Karcham, Chamera‐I, Chamera‐II, Chamera‐III, Sewa‐II, Parbati‐III, Koldam, Baspa, AD Hydro, Malana, Malana‐II, Budhil 

13.06.2017

7  J&K  Uri‐I, Uri‐II, Bairsasuil, Dulhasti  16.06.2017 The present members agreed upon the above schedule.

27. LVRT issues of wind/solar generation

It was deliberated that as per the Technical Standards for Connectivity to the Grid, (Amendment), regulations, 2012, B.2 (3) states the following:

“Wind generating stations connected at voltage level of 66kV and above shall remain connected to the grid when voltage at the interconnection point on any

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or all phases dips up to the levels depicted by the thick lines in the following curve:

Provided that during the voltage dip, the individual wind generating units in the generating station shall generate active power in proportion to the retained voltage;

Provided further that during the voltage dip, the generating station shall maximize supply of reactive current till the time voltage starts recovering or for 300ms, which ever time is lower.”

Further as per the regulation, the station connected to the grid 06 months after publication of these regulation (i.e.15.04.2014) shall have the LVRT capability.

Regarding wind turbines commissioned before 15.042014, CERC in order dated 05.01.2016 in Petition No. 420/MP/2014 LVRT had directed that LVRT should be implemented for all wind turbines (except Stall Types) commissioned before 15.04.2014 having installed capacity equal to or more than 500 KW.

In the 36th NRPC meeting, the LVRT issue of wind/solar generation was raised wherein representative of RVPNL stated that LVRT is being enforced for wind stations. He agreed to submit the status of LVRT for wind stations

In 133rd OCC meeting, members expressed concern over long pending issue. RVPNL representative intimated that the issue has been taken up with the RE generators. OCC advised that the information should be submitted at the earliest.

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RVPNL submitted the status of LVRT.As per information received from RVPNL, it was noted that LVRT was not installed in many wind generating stations in Rajasthan.

OCC advised Rajasthan to take up the issue with wind generators for ensuring compliance of CEA Regulations and CERC orders in this regard.

( Action: RRVPNL; Time line: Immediate)

28. Half year analysis and feedback of Reserve Regulation Ancillary Services (RRAS)

RRAS was implemented from 12th April 2016 in accordance with the CERC (Ancillary Services Operations) Regulations, 2015. In this regard, POSOCO has submitted a detailed half year analysis (April’16 to September’16) and feedback on RRAS to CERC. This feedback is based on the experience gained on RRAS for the period of April 2016 to September 2016. The feedback is available on POSOCO’s website which can be seen at https://posoco.in/reports/half-yearfeedback-to-cerc/.

Members may discuss their experience on RRAS and give comment/suggestions, if any, for the same.

Additional Agenda for 134th OCC meeting

AA.1 Real Time data of Renewable

Clauses 6(3) and 6(4)(b) of General Connectivity Conditions of Central Electricity Authority (Technical Standards for Connectivity to Grid) Regulations 2007 stipulates the voice and data communication requirements for all the generating projects including the renewable, which are getting connected to the grid at voltage level of 33 kV and above. The relevant clauses are as under:

“ 6(3) – The requester and user shall provide necessary facilities for voice and data communication and transfer of on-line operational data, such as voltage, frequency, line flows, and status of breaker and isolator position and other parameters as prescribed by the Appropriate Load Despatch Centre.

6(4) – The requester and user shall cooperate with the Regional Power

Committee, and Appropriate Load DespatchCentres in respect of the matters listed below, but not limited to : -

(b) agree to maintain meters and communication system in its jurisdiction in good condition; “

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Similarly, Clause 4(4) of General Connectivity Conditions of Central Electricity Authority (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations, 2013 stipulates to provide communication facilities by generating stations feeding electricity into the system at voltage level of below 33 kV. The relevant clause is as under:

“4(4) – The applicant and the user shall provide necessary facilities in the

distributed generation resource for communication and storage of data and other parameters as may be stipulated by the appropriate licensee in a non-discriminatory manner.”

In view of the relevant Clauses of the CEA Regulations cited above, it is obligatory for all the grid connected renewable generators to provide necessary facilities for data-communication and data-storage and other parameters as may be stipulated. CEA had requested SLDCs to take up the matter with all the renewable generators to ensure transfer of data to the appropriate Load Despatch Centre, so that the real time generation data is available with them for centralized monitoring. The present status in this regard and the action plan with definite time frame to ensure real time data telemetry from all the grid connected Renewable Generators/Plants to the SLDCs is to be submitted to CEA and NRPC Sectt.. SE(O), NRPC stated that renewable generation is to be telemetered and telemetry data should be integrated at SLDC. All SLDCs were requested to take necessary action in this regard.

( Action: All SLDCs; Time line : 15.05.2017)

AA.2: Availability of station event logger at sub-station: 

As per clause 43.4.D of CEA Technical Standard for Construction of Electrical Plants and Electric Lines “Each 765kV, 400kV and 220kV Line shall be provided with facility for disturbance recording, distance to fault locator and time synchronization equipment (TSE). Event logger either stand alone or as a part of sub-station or switchyard automation system shall be provided for each 220 kV and higher voltage class sub-station or Switchyard. TSE complete with antenna, all cables, processing equipment’s etc., shall be provided to receive synchronizing pulse through global positioning system (GPS) compatible for synchronizing of event logger, disturbance recorder and SCADA/Automation system of the sub- station or Switchyard.”

A GPS time stamped station event logger becomes very useful in case of analysis of multiple element tripping and finalization of time stamped sequence of tripping. The issue of such station event logger availability at substation has been raised in various Protection sub-committee meetings also.

A format for compilation of information of Event logger at a substation was attached at Annexure-1 of Additional Agenda-II. The format is as shown below:

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Constituents were advised to submit the status of station event logger or SAS based event logger in the attached format for the 220kV and above substations by 31st May, 2017.

AA.3:Telemetry issues 

 

The current status of telemetry as furnished by respective SCADA dept. of the Constituents was presented. NRLDC informed that it was observed that the station at 220 kV level and below are getting charged without any telemetry and intimation to NRLDC leading to system monitoring issues. Moreover, these stations are not reflected properly in the furnished status of telemetry. Few examples being Sayla, Vatika stations.

OCC requested all concerned utilities to take necessary actions for better data availability and grid visibility.

Members agreed for the same and informed that they were taking necessary actions for data availability and informed that they would also review the telemetry status.

Non-availability of Reactors data in RRVPNL Domain data. NRLDC informed that the following reactors were not modeled in RRVPNL Domain data base.

 

S. no.  Station  Nominal Q (MVAr) Modelling 

1  HEERAPURA  50 Not present in domain DB 

2  CHABBRA  50 Associated bay missing, directly connected to bus

3  BIKANER  50 Not present in domain DB 

4  BARMER  50 Not present in domain DB 

  

S. No. Name of the stationVoltage Level 

(in kV)

Availability of 

station event 

logger

Healthiness of 

Event Logger

Is event logger time 

synchronised with 

GPS (Yes/No)

Date of commissioining 

of station event logger 

(in case of non‐

availability)

Remarks

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S. no.  Line  End 1 (MVAr) &End 2 (MVAr) 

Modelling

1  JODHPUR‐AKAL  50 & 50 Not present in domain DB 

2  CHABBRA‐BHILWARA 50 & 50 Not present in domain DB 

3  CHABBRA‐HINDAUN 50 & 50 Not present in domain DB 

4  HEERAPURA‐HINDAUN 50 & 50 Not present in domain DB 

5  RAJWEST‐JODHPUR 1 50 & 50 Not present in domain DB 

6  RAJWEST‐JODHPUR 2 50 & 50 Not present in domain DB 

 

OCC requested RRVPNL to model Domain data at their end. Representative from RRVPNL informed that they would model all such elements within a month.

Non-Availability of Telemetry while first time charging. NRLDC informed that RRVPNL has raised request for first time charging of many sub-stations/lines without data availability. List of stations which were asked for charging without telemetry is given below:

o 220 KV Amberi (LILO of Kankroli – Debari Line) o 220 Bhiwadi-Bhiwari Line o Surathgarh Critical Thermal Power Station o 220 KV Vatika Substation (Substation already charged)

OCC requested RRVPNL to model Domain data at their end. Representative from RRVPNL informed that they would model all such elements within a month.

( Action : RRVPNL; Time line: 31.05.2017)

Non Availability of Real-Time data from PTCUL NRLDC informed that data from critical inter-state stations is not available at NRLDC. The list of stations is given below: 1. 400 KV Sringar 2. 132 KV Bhagwanpur 3. 132 KV Mahua-Kheraganj 4. 132 KV Laxmi Sugar Mill 5. 132 KV Kotdwar 6. 132 KV Kalagarh It was requested to arrange for the real time data availability of aforementioned critical sub- stations for better visibility and smooth operation of grid. OCC requested PTCUL for data availability at the earliest.

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Non-availability of communication between PTCUL and NRLDC. NRLDC informed that ICCP Communication between PTCUL and NRLDC is working on single channel which is a leased line from BSNL till Roorkee where it is merged with POWERGRID network. Communication is highly unreliable and outage leads to continuous outage for days. NRLDC requested PTCUL to arrange for alternate channel. Matter was discussed in 10th TeST Meeting and it was informed that PTCUL was laying FO network where the fibre between Rishikesh and Dehradun Station was available. In case 6 fibre is shared with POWERGRID, then the communication could be made available up to SLDC, Dehradun. POWERGRID also confirmed that the end equipments were already installed at Rishikesh and Dehradun for necessary termination. The above link is necessary as only one ICCP link was configured between PTCUL and NRLDC due to availability of only one channel. The integration of VCS, VOIP, redundant channel for ICCP was still pending due to non-availability of communication channel. Members opined that there is a need of stable and reliable communication and request PTCUL to look into matter.

AA.4 Presentation on weather website for Northern Region

NRLDC-IMD has developed a weather website for Northern Region. The information provided on this website is dedicated to Power System operators. NRLDC made a presentation for the same. Copy of the presentation is enclosed as Annex-IV. The link of the website is:- http://www.amssdelhi.gov.in/NRLDC/main/MAIN.html.

AA.5 Summer Preparedness meeting by MoP: 

A meeting was taken by Secretary (P), Ministry of Power (MoP) on 31stMar 2017regarding preparedness for Power Supply Position during the summer in the country. Minutes of meeting was attached at Annexure of Additional Agenda-III. Major issues that are foreseen during coming summer were discussed in details. To take care of major issues and taking consideration of reliable & safe power supply scenario during upcoming month, certain directions has been issued to the concerned utilities. Constituents were requested to co-operate and coordinate to implement the action plan given in minutes of meeting. Constituents agreed to implement the action plan given in the minutes of meeting.

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AA.6Spare Transformer of 500 MVA for Delhi-NCR (Agenda by DTL)

Representative of DTL stated that at Bamnauli (DTL) substation, 2x315 MVA, 400/220kV ICTs have been upgraded to 2x500 MVA, 400/220kV ICTs in previous years. However, Mandola (PGCIL) and Maharani Bagh (PGCIL) already have 500MVA, 400/220kV ICTs. The nos. of 500MVA, 400/220kV ICTs in Delhi-NCR region have increased .The possibility of forced outages of 500MVA transformers cannot be ruled out during stressed grid conditions. The restoration of ICT may take considerable time. In view of this, there is a need of having spare 500MVA, 400/220kV ICT in Delhi-NCR region. Delhi OCC in its meeting held on 28thFebruary 2017 deliberated the issue and advised DTL to take up in NRPC/OCC meeting to have spare 500MVA, 400/220kV ICT. The issue was discussed in OCC. It was informed by POWERGRID that the spare transformers are maintained by POWERGRID at regional level. SE, NRPC stated that as decided in 13th TCC & 14th NRPC Meetings (18th & 19th September 2009) POWERGRID procured 02 nos. of spare 315 MVA ICTs one for Delhi, UP, Uttarakhand & Rajasthan and other for rest of the States of NR. Representative of POWERGRID intimated that the spare ICTs are for POWERGRID sub-stations in NR.

Annex‐I

Name Designation Organization Fax No. Phone/Mobile e-mail IDKuldeep.S.Manderna Addl.SE/PC BBMB 0172-2653297 9417200352 powerc@bbmb.nic.in

V.K.Srivastava Dir,NPC CEA 9560763305 dhirajcea@gmail.com

S.K.Mishra SM(E) NHPC 9910103478 skm.nhpc@yahoo.com

Vijay Kumar E(E) NHPC 9818696821 vijay.kumar239@gmail.com

R.D.Yadav STE(E&I) NPCIL 9413354527 rdyadav@npcil.co.in

H.S.Jadaun STE(E&I),NAPS NPCIL 9412768009 hsjadaun@npcil.co.in

Kamaldeep Dy.Mgr NRLDC 9971700422 kamal.jss77@gmail.com

D.K.Jain Addl.GM NRLDC 011-26852747 9910344127 dkj2009@yahoo.co.in Rajeev Porwal DGM NRLDC 011-26852747 9871581133 rk.porwal@posoco.in

P.K.Agarwal GM NRLDC 9910064320 pkagarwal@posoco.inDevendra Kumar DGM NRLDC 9910267682 dkumarp@posoco.in

Manoj Kumar Agarwal DGM NRLDC 9873549070 mkagarwal@posoco.in

Ankit Gupta Sr.Mgr. NRLDC 9560270520 ankitinfo6@gmail.com

Mohd.Zia AGM(OS),NRHQ NTPC 9415005883 mohdzia@ntpc.co.in

P.K.Saini Sr.Mgr(OS) NTPC 9650991759 pksaini@ntpc.co.in

D.Chakraborty Addl.GM PGCIL 9873549050 dchakra@powergridindia.com

D.Kushwaha AGM PGCIL 9425409591 dkushwaha72@gmail.com

S.C.Sharma Chief Manager PGCIL 9873918526 cpccnr1@gmail.com

Praveen Kumar DGM PGCIL 9419213490 pkpowergrid@gmail.com

Rajeev Agarwal Manager SJVNL 9418045426 rajeev_sjvnl@rediffmail.com

Vishalakshi Malan Sr.Engineer THDC 8755297715 vishalakshi.malan@gmail.com

Loveleen Singh GM(T),O&M DTL 9999533659 gmom1.dtl@gmail.com

Pradeep Katiyar DGM(T),SLDC DTL 9999533676 pradeepkatiyar03@yahoo.co.in

B.L.Gujar Manager(T)Prot. DTL 9999533985 bl.gujar@dtl.gov.in

Naveen Kumar AM(T),SLDC DTL 9999533883 naveen0634engg@gmail.com

Abhishek Ranjan AVP,SO BRPL 9555290403 ABHISHEK.R.RANJAN@RELIANCEADA.

O.K.Sharma CE/HPPC HVPNL 9316274614 cenppc@gmail.com

U.K.Agarwal SE/HPPC HVPNL 9356615100 cenppc@gmail.com

Er.Deepak Uppal Dy.CE HPPTCL 9418109169 pcshimla2003@gmail.com

Er.Pritam Chauhan Sr.Xen HPPTCL 9816495679 sehpsldc@gmail.com

Saleem Mohammad ASE/SLDC PSTCL 96461-18001 ddpc_pseb@rediffmail.comS.K.Sarwal ASE/SLDC PSTCL 96461-23334 sarwal812@gmail.com

Er.Iqbal Singh ASE/SLDC PSTCL 96461-22263 pcpseb@gmail.com

V.K.Gupta AEN(SOLD) RUVNL 9413383201 se.ldrvpnl@gmail.com

Atul Sharma EE(SOLD) RUVNL 9413382632 sharma.atul1@rvpn.co.in

C.L.Koli SE(PP) RUVNL 9413385340 se‐pp@rrvun.com

M.M.Ranwa CE(RUVNL) RUVNL 9413359050 ceruvn@gmail.com

M.P.Sharma AEN(P&P) RUVNL 9413382617 mahavir.sn@rediffmail.com

Pankaj Saxena EE UPPTCL 9415902780 smart.saxena@gmail.com

A.J.Siddiqui EE UPPTCL 9415609363 ajsiddiqui1962@gmail.com

List of Participants in the 134th OCC meeting held on 24.04.2017 in NRPC Conference Hall,New Delhi

M. Abu Zar EE UPPTCL 9412753081 eeemd1htpc@gmail.com

Kavindra Singh Tech.Advisor UPPTCL 9412749803 skavindra@yahoo.co.in

Anupam Sharma SE,SLDC PTCUL 9927178058 anupam_sharma@ptcul.org

Manoj Taunk GM AD Hydro 9099005517 manoj.taunk@adani.com

P.S.Mhaske MS NRPCHemant Pandey SE(S) NRPCB.S.Meena EE(S) NRPCK.N.Rao Chf.Mgr NRPCSonia Chauhan ASE NRPCAkshay Dubey AEE NRPC

Satyendra Prakash AGM(T)-COS IPGCL-PPCL 9717694813 spmprakash@gmail.com

Annex‐II

Sr. No.

State / UT No. ofSchemes

Scope of Work (Scheme) Approved Cost

Grant Sanctione

d

Date of Sanction

Funds Released

Status

Renovation and Upgradation of protection system in the substations of Jammu.

140.04 140.04 28/10/2015 0.00 0.00 %

Renovation and Upgradation of protection system of substations in Kashmir area.

146.12 146.12 17/03/2016 0.00 0.00 %

Installation of Bus bar protection scheme in the state of Punjab

18.21 16.39 17/03/2016 0.00 0.00 %

Provision of second DC Source at 220 kV & 132 kV Grid Sub Stations of PSTCL

15.30 13.78 01-02-17 0.00 0.00 %

3 Himachal Pradesh

1 Renovation and Upgradation of Protection System of substations of HPSEBL.

55.44 55.44 01-05-16 0.00 0.00 %

4 Uttrakhand 1 Renovation and Upgradation of Protection System of substations in PTCUL.

125.05 125.05 17/03/2016 12.50 10.00 %

5 Haryana 1 Renovation and Modernization of distribution system of DHBVN, Haryana.

364.27 273.2 09-05-16 0.00 0.00 %

Renovation and Upgradation of protection system of 220kV and 400kV substations in the state of Rajasthan in order to rectify Protection related deficiencies

159.53 143.58 31/12/2014 10.79 7.51 %

Installation of 1 no each new 400kV, 125MVAR Bus Type Shunt Reactor at 400kV Hindaun and 400kV GSS Merta City, alongwith shifting of 400kV, 50MVAR Bus Type shunt reactor from 400kV Merta City to 400kV Bhilwara and associated bays at these stations.

23.87 21.48 31/12/2014 6.45 30.03 %

7 Delhi 1 Rectification and Upgradation of protection system and replacement of outlived equipments in DTL substations

125.98 113.38 17/03/2016 11.34 10.00 %

( Amount in Rs. Crores)

2 2Punjab

Rajasthan 26

NORTHERN REGION SCHEMES FUNDED FROM PSDF

% of fund Disbursed

against grant Sanctioned

21 Jammu &Kashmir

8 Northern Regional Power Committee (NRPC)

1 Study program on the integration of renewable energy resources of NRPC

6.45 6.45 28/10/2015 4.49 69.61 % Completed

Installation of Capacitors banks in the state of Uttar Pradesh in order to improve Voltages

39.29 35.36 05-11-15 7.76 21.95 %

Renovation and Upgradation of Protection and control Systems, UFR Mapping and Islanding scheme in the state of Uttar Pradesh to rectify Protection related deficiencies

202.94 182.65 05-11-15 38.03 20.82 %

Reconductoring of 11 Nos of 132kV Lines of the state network of UPPTCL for Relieving Congestion

80.00 60.00 17/03/2016 0.00 0.00 %

14 1502.49 1332.92 91.36 6.85 %TOATALNOTE: One scheme of Uttar Pradesh for relieving congestion (Rs. 60 crores sanctioned grant during 2015-16) is not eligible as the LoA hasalready been placed before the approval of the scheme.

Uttar Pradesh

39

Annex-III

1. Transmission Lines which are recommended to be certified as ISTS S.No

Name of the Transmission Line

Owner STU

Average % Utilization (of 2nd and 4th Qtr of 2016-17) by states other than the home state of owner STU

1. 220KV PGCIL Panchgaon-Mau D/C line HVPNL 63.8 2. 400KV NTPC Jharli-Daultabad D/C line HVPNL 52.3 3. 400KV Sec-72 PGCIL-Daultabad D/C line HVPNL 65.05 4. 400KV CLP(Jhajjar)-Dhanonda D/C line HVPNL 89.75 5. 400kV S/C Jodhpur-Merta Line-I RVPN 62.25 6. 400kV S/C Jodhpur-Merta Line-II RVPN 62.25 7. 400kV S/C Merta - Ratangarh Line RVPN 63.45 8. 400kV S/C Merta - Heerapura Line RVPN 58.75 9. 220kV D/C Aau – Baithwasia Line RVPN 53.45 10. 220kV D/C Baithwasia – Bhawad Line RVPN 52.6 11. 220kV D/C Badisid- Aau Line RVPN 53.15 12. 220kV S/C Bhadla- Bap Line RVPN 52.35

2. Transmission Lines which do not full fill the criteria (as finalized by the Group) to

be certified as ISTS S.No

Name of the Transmission Line

Owner STU

Average % Utilization (of 2nd and 4th Qtr of 2016-17) by states other than the home state of owner STU

1. 220KV PGCIL Panchgaon-Badshahpur D/C HVPNL 33.2 2. 400 KV MAINPURI PG-PARICHHA-1 UPPTCL 23.5 3. 400 KV MAINPURI PG-PARICHHA-2 UPPTCL 23.5 4. 220 KV PANKI-POWERGRID(KNP)-I UPPTCL 5 5. 220 KV PANKI-POWERGRID(KNP)-II UPPTCL 5 6. 220 KV KANPUR SOUTH-

FATEHPUR(PGCIL) UPPTCL

31.75 7. 220 KV FATEHPUR-FATEHPUR(PG)-II UPPTCL 10.4 8. 220 KV NAUBASTA-FATEHPUR(PGCIL) UPPTCL 26 9. 220 KV FATEHPUR-FATEHPUR(PG)-I UPPTCL 10.4 10. 220 KV NAUBASTA-PGCIL(KNP) UPPTCL 1.35 11. 220 KV MAINPURI-PGCIL(KNP)BHAUTI UPPTCL 24.75 12. 220 KV MANPURI-PGCIL(MNP)BHOGAON-I UPPTCL 4.15

13. 220 KV MANPURI-PGCIL(MNP)BHOGAON-II UPPTCL 4.15 14. 220 KV HDJ-PGCIL(MNP)BHOGAON UPPTCL 21.6 15. 220 KV FIROZABAD-PGCIL(MNP)BHOGAON UPPTCL 32 16. 220 KV ORAI-PGCIL(KNP)BHAUTI UPPTCL 22.3 17. 220 KV BASTI-PGCIL(GKP) UPPTCL 21.05 18. 220 KV GORAKHPUR-PGCIL(GKP) UPPTCL 3.85 19. 400 KV Greater Noida-Dadri UPPTCL 30 20. 220 KV Modipuram-Matore(PG)-I UPPTCL 3.7 21. 220 KV Modipuram-Matore(PG)-II UPPTCL 3.7 22. 220 KV Muzaffarnagar(Nara)-Matore(PG) UPPTCL 20.85 23. 220 KV Simbholi-Matore(PG) UPPTCL 1.25 24. 220 KV Satabdinagar-Matore(PG) UPPTCL 1.35 25. 220 KV Gajraula-Matore(PG) UPPTCL 7.7 26. 220 KV Nahtaur-Matore(PG) UPPTCL 26.3 27. 400 KV SAROJINI NAGAR-PGCIL(KURSI

RD.) UPPTCL

43.3 28. 400 KV SULTANPUR- PGCIL(KURSI RD.) UPPTCL 49.9 29. 220 KV CHINHAT-LUCKNOW PG UPPTCL 11.4 30. 220 KV CHINHAT-RAEBARELI(PG) UPPTCL 6.65 31. 220 KV SAROJINI NAGAR-RAEBARELI(PG) UPPTCL 5.35 32. 765 kV Anpara C-Unnao UPPTCL 40.2 33. 220kV D/C Gajner – Bikaner(400kV GSS)Line RVPN 14.4 34. 400kV D/C Phagi-Heerapura line RVPN 32.95 35. 220kV S/C Bhiwadi(PG)-Bhiwadi(RVPN)Line RVPN 4.2 36. 220kV S/C Bhiwadi(PG)-Khushkhera Line-I RVPN 15.6 37. 220kV S/C Bhiwadi(PG)- Khushkhera Line-II RVPN 15.6 38. 220kV S/C RAPP(A)-Debari Line RVPN 18.4 39. 220kV D/C RAPP(A)-Sakatpura Line RVPN 38.6 40. 220kV S/C Anta GTPS-Dahra Line RVPN 3.6 41. 220kV S/C Bap-Phalodi Line RVPN 30.75 42. 220kV S/C Bap-Barsingsar Line RVPN 31.4 43. 220kV D/C Bhawad-Jodhpur(400kV GSS)Line RVPN 25.9 44. 220kV D/C Bhawad-Bhopalgarh Line RVPN 26.25 45. 220kV S/C Dechu-Tinwari Line RVPN 6 46. 220kV D/C Dechu-Phalodi Line RVPN 26.55 47. 220kV S/C Phalodi-Tinwari Line RVPN 10.9 48. 220kV S/C Tinwari-Jodhpur(400kV GSS)Line

(Circuit-I) RVPN

14.25 49. 220kV S/C Tinwari-Jodhpur(400kV GSS)Line

(Circuit-II) RVPN

14.25 50. 220kV S/C Bhadla-Badisad Line RVPN 7.8 51. 220kV S/C Barsingsar-Bikaner line RVPN 37.2 52. 220kV S/C Barsingsar-Nagaur line RVPN 1.2 53. 220kV S/C Bhopalgarh-Merta line RVPN 19.25 54. 220kV S/C Bhopalgarh-Khinwsar Line RVPN 25.4 55. 220kV S/C Nagaur-Nokha Line RVPN 23.6 56. 220kV S/C Jodhpur(220kV GSS)-Pali line RVPN 4.3 57. 220kV S/C Jodhpur(400kV GSS)-Bilara line RVPN 12.05 58. 220kV D/C Kanasar-Bhadla line RVPN 18.3 59. 220kV D/C Ramgarh-Dechu line RVPN 9.65

60. 132kV S/C Gajner – Pugal Road Line RVPN 8.35 61. 132kV S/C Pugal Road-Bikaner Line RVPN 8.5 62. 132kV S/C Gajner-Bhinasar Line RVPN 9.25 63. 132kV S/C Bhinasar-Bikaner Line RVPN 10.15 64. 132kV S/C Pokran-Dechu(220kV GSS)Line RVPN 10.8 65. 132kV S/C PS(2)-PS(1)Line RVPN 19.65 66. 132kV S/C PS(1)-Bajju Line RVPN 21.1 67. 132kV S/C Bajju- Kolayat Line RVPN 18.95 68. 132kV S/C PS(3)-PS(4)Line RVPN 0.1 69. 132kV S/C PS(4)-PS(5)Line RVPN 12.1 70. 132kV S/C PS(5)-Phalodi Line RVPN 15.9 71. 132kV S/C Sanwreej- Dechu Line RVPN 0.1 72. 132kV S/C Osian- Tinwari Line RVPN 4.1 73. 132kV D/C Osian- Baithwasia Line RVPN 10.6 74. 132kV S/C Khetusar-Bhadla Line RVPN 0 75. 132kV S/C Bap-Phalodi Line RVPN 8.6 76. 132kV S/C Kolayat- Gajner Line RVPN 20.4 77. 132kV S/C Jayal- Nagaur Line RVPN 0.05 78. 132kV S/C Gajner-Gajner(220kV GSS)Line RVPN 3.5 79. 132kV S/C PS(2)- PS(3)Line RVPN 23.9 80. 132kV S/C Pokaran – Chandan Line RVPN 9.6 81. 132kV S/C Dechu(220kV GSS)-Dechu(132kV

GSS Line)(Circuit-I) RVPN

1.7 82. 132kV S/C Dechu(220kV GSS)-Dechu(132kV

GSS LINE))Circuit-II) RVPN

1.7 83. 132kV S/C Dechu(132kV GSS)-Balesar Line RVPN 2.95 84. 132kV S/C Balesar-Tinwari Line RVPN 1.95 85. 132kV S/C Dechu(132kV GSS)-Chamu Line RVPN 2.9 86. 132kV S/C Chamu –Tinwari Line RVPN 1.1 87. 132kV S/C Sheo- Barmer Line RVPN 3.85 88. 132kV S/C Sheo- Jaisalmer Line RVPN 13.4 89. 132kV S/C Sheo- Undoo Line RVPN 0.05 90. 132kV S/C Dechu- Phalodi Line RVPN 14.45 91. 765kV Anta-Phagi 1 & 2 RVPN 20.75

3. Transmission Lines which were not modelled by STU for PoC charge calculation and

hence could not be considered for study

S.No Name of the Transmission Line Owner STU

1. 220 KV BKT-LUCKNOW PG UPPTCL 2. 220kV S/C Bhiwadi(PG)-Neemrana Line RVPN 3. 220kV S/C Bap-Badisid Line RVPN

4. Transmission Lines which are natural interstate lines and hence need not be

certified as ISTS

S.No Name of the Transmission Line Owner STU

1. 220KV Bhiwadi-Mau S/C line HVPN

2. 220 KV Bhiwadi- Rewari S/C line (Earlier 220KV S/C Badshahpur- Rewari line)

HVPN

3. 220 KV Bhiwadi- HSIIDC Bawal S/C line HVPN

5. Following 03 lines submitted by Rajasthan under construction and therefore were not considered in the study:

(i) 400kV D/C Bhadla-Bikaner line(Quad Moose) (ii) 132kV S/C PS(2)-Kanasar Line (iii) 132kV S/C PS(3)-Kanasar Line

6. Transmission Lines need not to be certified as ISTS by RPC

(i) 220kV S/C RAPP(B)-RAPP(A) Line (ii) 220kV S/C RAPP(B)-Sakatpura Line (iii) 220kV S/C Anta-Kota(Sakatpura) Line

09‐May‐17

1

Annex‐IV

New Website : NRLDCNorthern Regional Weather Information (IMD‐POSOCO Website)

IMD‐POSOCO Website(http://amssdelhi.gov.in/NRLDC/main/MAIN.html)

Information available at the Website: 

Regional Weather Summary

State > Station wise Now cast

F Forecast

Warning 

Radar  data updating @ 10 min 

Radar available at Srinagar, Delhi, Jaipur, Patiala & Lucknow

Satellite Images updating @ 30 min

FOG Forecast – Location specific

Meteogram‐ Forecast of cloud cover, rainfall in graphical representation

09‐May‐17

2

Stations Covered Rajasthan : 36

Uttar Pradesh : 35 

J&K:  19 

HP: 18

Punjab: 17

Delhi : 17

Uttarakhand: 15

UT Chandigarh: 3

Stations have been linked to the nearest Weather Station

NOWCAST Nowcasting is a technique to forecast the Weather fora short period ahead

Issued by Metrological department every Three hrs .

FORECAST Weather forecast is provided every day for the current day & next 6 days

Revised Forecast is issued by IMD every day.

Th  f ll i  i f i   i  i  F The following information given in Forecast.

09‐May‐17

3

Meteogram (Type‐I)  The above Meteogram is 3 hourly forecast  for 10 days. Each Meteogram Provides information for 10 kMradius

Available for 23 Locations in Northern Region Available for 100 Locations in the Country Available for 100 Locations in the Country  It shall be increased to 450 locations in the near future. 

It  provides Plots  for 1) Rainfall2) Cloud Cover( low, middle and High)3)  Temperature 4) Humidity5)  Wind speed 

Three Hourly Forecast for 10 Days 

Green Shading indicates relative humidityhumidity

FrezingTemperature32 F or O degree C

Rains

Thunderstorm

Clouds

09‐May‐17

4

Indicator of Thunderstorms Lifted Index:  

Value > Zero: Thunderstorms are unlikely Value between 0 and ‐2 : Thuderstorms are possible with Good 

Trigger Value between ‐3 and ‐5 : Thunderstorms are probable Value more than ‐5 : Strong Probability of Severe Thunderstorm

CAPE (convective available potential energy) : Indicator of atmospheric Instability

The purple bars indicate the CAPE value at the surface in units of J/kg.

CAPE is a measure of the buoyancy of a layer. The larger the CAPE, the greater the potential for severe weather.

Any value greater than 0 J/kg indicates instability and the possibility of thunderstorms.

The base line for the bar graph of CAPE is 0

Meteograms (Type‐II) 

Available for 14 stations in Northern Region

Provides forecast for 3 days ahead 

Provides Plots for  Forecasted Value of 

Temperature

Humidity

Pressure 

Rainfall

Td =Dew Point Temperature: Dew point is the temperature towhich air must be cooled to become saturated with water vapor

Northern Regional Weather Summary 

09‐May‐17

5

UTC Time

The world's weather communities use a twenty four hour clock, similar to "military" time based on the 0° longitude meridian, also known as the Greenwich meridian. 

Prior to 1972, this time was called Greenwich mean time (G ) b i f d di d i l i(GMT) but is now referred to as coordinated universal time or universal time coordinated (UTC). It is also known a "Z time" or "Zulu time".

To obtain your local time( IST) here in the  INDIA, We  need to add 5 hours and 30 minutes  from  Coordinated Universal Time.

RADAR: Radio Detection and Ranging 

Radar Transmitter transmits Electromagnetic Waves through a directionalAntenna in any given direction Part of Energy is absorbed by the Atmosphere

Fraction of it is scattered back by the Targets and is received by the Receiver

Received Power Depends Upon Transmitted Power, Wavelength , Vertical and Horizontal Beam Width ,

Scattering cross section of targets,

I f W h (R i D S H il In case of Weather (Rain Drops,Snow ,Hail etc.

Return Power provides information about weather Intensity andazimuth and Elevation of Antenna gives Location and Height ofCloud, Time taken by electromagnetic waves in to and Fro Journeygives range of the Target

Doppler Weather Radar employ Doppler Principle to provide speed anddirection of the Targets. (When the source for signals and observers are inrelative motion then there is change in Freq observed by the Observer Incase the source and Observer are moving closer ,Frequency increases andVice Versa)

Radar products are updated every 10 Minutes

Various Elevation of Radar Images Presently IMD radar have following elevation for scanning :

0.5 Degree

1.0 Degree

2.0 Degree

3.0 Degree

6.0 Degree

9.0 Degree

12.0 Degree

16.0 Degree &

21.0 Degree

Radar completed the process of scanning with all these elevation &sending the data within 10 Minutes.

09‐May‐17

6

Products from Doppler Weather RadarsPlan Position Indicator

Plan Position Indicator:   A constant elevation surface data is presented as a cloud image around the Radar Station. The data depicted is on the slant range depending on the elevation angle (generally 0.5 degree) 

Reflectivity (dBZ) The colors on the legend are the different echointensities (reflectivity) measured in dBZ.

"Reflectivity" is the amount of transmitted powerreturned to the radar receiverreturned to the radar receiver.

Typically, light rain is occurring when the dBZ valuereaches 20, 35‐40 Moderate , 40‐50 Moderate to Heavy50‐55 Heavy rain

Hail is a good reflector of energy and will return veryhigh dBZ values

Greater than 55

Plan Position Indicator (Mean Velocity m/s) 

09‐May‐17

7

This Product is same as conventional Radars . A Display is generated on the Range on the X‐Axis and  height of the Cloud Surface on Y‐Axis

Range Height Indicator

Surface Rainfall Intensity (mm/H) The SRI generates an image of the Rainfall Intensity in a user selectable surface layer with constant height above ground

Precipitation Accumulation (mm)

The PAC product is a second level product . It takes SRI products and Accumulates the Rainfall at a User definable Time Period(It is 24 hours in our Case)

Volume Velocity Processing 

This displays the Horizotal wind Velocity and Wind Direction in a vertical ColumnAbove the Radar Site

09‐May‐17

8

Volume Velocity Processing 

5 Knots25 Knots(Knot*0.51= m/s)

Wind Direction and Speed of the Wind

10 Knot Barb

N

Indicates Direction

5 Knot Barb

W

S

E

50 knot Symbol

Satellite Meteorology Satellite Meteorology refers to the study of earth’s atmosphere and oceans using data obtained from remote sensing devices flown onboard satellites orbiting the earth  Satellites makes masurementorbiting the earth. Satellites makes masurementindirectly by sensing electromagnetic radiations coming from the surface below

Kalpana‐1 and Insat 3D  are being used to monitor the Weather of Indian Origin.

Images are updated every 30 Minutes

A Typical Satellite Image

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Fog Forecast for Northern Region:(Issued by REMC Delhi in Winters) METAR

METAR is a format for reporting weather information.

A METAR weather report is predominantly used by pilots in fulfillment of a part of a pre‐flight weather briefing  and by meteorologists  who use aggregated briefing, and by meteorologists, who use aggregated METAR information to assist in weather forecasting.

METAR is the scheduled observation taken at the end of each hour..

Information Contained in METAR A typical METAR contains data for the temperature, dew point, wind direction and speed, precipitation, cloud cover and heights, visibility, and barometric pressure.

A METAR may also contain information on precipitation A METAR may also contain information on precipitation amounts, lightning, and other information that would be of interest to pilots or meteorologists

In addition, a short period forecast called a TREND may be added at the end of the METAR covering likely changes in weather conditions in the two hours following the observation.

BRPL –A Case Study  BSES Rajdhani Power Limited (BRPL) has recently started using the products / features available on the website on regular basis.

Weather information for Delhi’s different location  Weather information for Delhi s different location relevant to its license area viz. Mehrauli, Maharani Bagh, Badarpur, Najafgarh etc., Meteogram, Nowcast, Forecast and Warning.

Radar products viz. MAXZ, Surface Rain Indicator, PPI, PPZ etc

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BRPL‐ A Case Study The last week of March 2017 was predicted to be very hot and dry, which prompted units of Dadri TPS to be brought on bar to meet rising demand, in time. 

BRPL sent a note to Delhi SLDC along with the  BRPL sent a note to Delhi SLDC along with the Meteogram predicting severe temperatures during last week of March 2017

Forecast of High Temerature

BRPL‐A Case Study The prediction of rainfall as well as fall in temperatures from ~ 40oC  after 4th Apr 2017 helped  in concluding a fall in demand and therefore defer decision to switch on (bring to bar) another unit of decision to switch on (bring to bar) another unit of Dadri TPS, which, would otherwise, have been brought to bar.

The prediction of rainfall became stronger with each passing day

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Thunder  

Rain Forecast

Fall in Temeprature

storm Forecast

Real Time tracking through radar Images Continuous tracking of rainfall movement on 4th and 5th

April 2017, helped backing down generation in advance tosome extent (about 60 MW),which led to lowering ofUnderdrawl in real time on the evening of 5th April 2017,starting around 18:00 hours. Rainfall accompanied withg f pThunderstorms hit Delhi around 17:00 hours that evening.

Earlier, rainfall / thunderstorms hit Delhi around 23:00 hours on 4th April 2017, for which clear prediction was available much earlier (> 3 hours ahead; As per IEGC, 4 to 6 fifteen minutes timeslots are needed for revision in schedule).

Tracking of Radar image (updated every 10 mins) helped predicting more accurate timing of thunderstorm hitting West and South Delhi on 4th April night and again on 5th April evening

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Tracking of Rainfall Movement on 5th April 2017

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Way Forward for Summer 2017BRPL ‐Perspective The months of April and May (Pre‐monsoon Thundershowers) and 

June, July & August (Monsoon) are crucial for Delhi for daily load management on grid ensuring overdrawl / underdrawl within limits for grid security.

Tracking of real time Thunderstorm / Rainfall movement shall help plan in advance to back down the generation in at least 1.5 hours in plan in advance to back down the generation in at least 1.5 hours in advance, to limit underdrawl. The quantum of generation to be backed down shall be a percentage of the load prevalent prior to thunderstorm. The load fall gradient on the 4th April (which was about fall of 200 MW in one hour) and 5th April (About 150 MW in one hour in the evening), shall guide the percentage backing down scheduling instructions.

The load fall gradients shall be different for different ambient weather conditions in May, June, July and August and thus, the historical load fall due to similar weather conditions as experienced during last summer, shall guide the percentage in coming months.    

Way Ahead : Power Sector Similar sites to be developed for other Regions

Likely  be completed before 30th April 2017.

Continual value addition based on availability of information at IMDend and the requirement for Grid Operation

• Utilisation of Radar Products in Real time Grid Operation

•Probably first of its kind in India

• Availability of meteogram information in tabular format / data format,   to  integrate with demand forecasting/EMS models .

• Use of Mateo gram/Weather data for short Term /Long Term Generation Planning

Solar irradiance forecast & real time data to be made  available to facilitate solar generation forecast. 

Radar Picture of Delhi‐26th January 2017

Rain/HailstormHailstorm

No rainaround LalKila & Rajpath

THANK YOU