No. उ. क ष. व. स./प रच लन/106/01/2017/ द न क: स व म : प रच लन समन वय उपसममत क सदस य To: Members of OCC

Transcription

1 फ न: , फ क स: ई ल: बस ईट: भ रत सरक र उत तर क ष त र य व द य त सव वत 18-ए, श.ज त ससह र ग, कट ररय सर य, नई द ल ल Government of India Northern Regional Power Committee 18-A, S. Jeet Singh Marg, Katwaria Sarai, New Delhi No. उ. क ष. व. स./प रच लन/106/01/2017/ द न क: स व म : प रच लन समन वय उपसममत क सदस य To: Members of OCC व षय: प रच लन स न य उपसव वत क 133 ब ठक क क यग त Subject: Minutes of 133 rd OCC meeting. प रच लन स न य उप-सव वत क 133 ब ठक & क, क र श नई द ल ल ए लखनऊ, आय वजत क र य थ उक त ब ठक क क यग त त उत तर क ष त र य व द य त सव वत क ब स इट पर उपलब ध ह 133 rd meeting of the Operation Co-ordination sub-committee was held on & at New Delhi and Lucknow, respectively. The Minutes of this meeting have been up-loaded on the NRPC web-site हस त क षररत / (ह त क र प ड य) अध क षण अवभय त (प रच लन) 1

2 Minutes of 133 rd OCC meeting, held on 15 th at New Delhi & 17 th March 2017 at Lucknow 133 nd meeting of the Operation Coordination Sub Committee (OCC) of NRPC was held on 15 th March at New Delhi. & 17 th March, 2017 at Lucknow. List of participants is enclosed at Annexure-I. 1. Confirmation of Minutes: The Minutes of the 132 nd meeting of the OCC held on 16 h and 17 th Febuarary, 2017, at New Delhi issued vide letter dated were confirmed by the Sub- Committee. 2. Maintenance Programme of Generating Units and Transmission Lines: 2.1 Maintenance programme for Generating Units. The maintenance programme for Generating Units for the month of April, 2017 was discussed on The details of approved/deferred outages of generating units as per deliberations in OCC has been issued vide letter no dated OCC advised all the generating utilities specially, hydro, to complete all the maintenance related activities by April end, keeping in view ensuing peak demand and high hydro season. (Action : All generating utilities ; Timeline: by April,2017 end) 2.2 Outage programme for Transmission Elements. The Outage programme of NLDC & NRLDC oversight transmission assets for the month of March, 2017 was discussed on The details of approved/deferred outages of transmission assets as per deliberations in OCC has been issued vide letter no dated OCC advised to complete all the transmission system maintenance related activities by April end, keeping in view ensuing summer months, when it would be difficult to allow shutdown. (Action: All transmission utilities; Timeline: by April, 2017 end) NLDC and NRLDC representative stated that on several occasions RVPNL had got the shutdown approved in OCC but neither shutdown was availed nor was information in advance given to NLDC /NRLDC for deferment of shutdown, due to which outage request of other utilities affected. OCC advised RVPNL to apply shutdown with proper planning, after consultation with other concerned utilities, so that approved shutdowns are availed. (Action: RVPNL) 2

3 3. Planning of Grid Operation for April 2017: 3.1 Anticipated vis-à-vis Actual Power Supply Position (Provisional) for January, 2017: SE (Operation), NRPC stated that there are much variations (i.e. > 5.0%) in the Anticipated vis-à-vis Actual Power Supply Position (Provisional) for the month of February 2017 in the terms of Energy requirement for Delhi, Haryana & Rajasthan and in the terms of Peak demand for Haryana, HP, Uttrakhand & Rajasthan and in terms of Peak Demand for Punjab & Rajasthan. The variation in anticipated and actual energy requirement and peak demand was discussed and the reason, as explained by Haryana, HP, Uttrakhand, Punjab & Rajasthan was due to unexpected weather condition (i.e. high temperature/ low cold/ heavy rain/fog) and less demand by Agricultural consumers in Uttarakhand during the month of February, OCC expressed concern regarding sub-optimal demand estimates, as most of the reasons mentioned by the constituents for variation were normally anticipated during these months. Members were advised to analyze and specify the reasons in detail, in case the variation in demand or availability as compared to anticipated figures was more than 5%, and submit the same along with the provisional/revised Power Supply Position Data (preferably along with form 29, provisional PSP data, by 2 nd day of the next month for the subject month) as well as in the OCC meeting, regularly Power Supply Position: (Action: All SLDCs; Time line: by 2 nd / 15 th day of every month) SE, NRPC stated that the provisional Power Supply Position and Notified Power Cuts for the month of are available on CEA website. All SLDCs were once again requested to furnish the provisional and final power supply position in prescribed formats positively by 2 nd and 15 th day of the month, respectively so that the same can be forwarded to CEA in time. OCC advised all the members that the reasons regarding, demand not met/energy not supplied, if any, must be specified in the report being submitted. It was also advised that the reason for any substantial variation (more than 5%) in demand/availability as compared to last month/year must be given along with the PSP data. 4. Power Supply Position for NCR: (Action: All SLDCs; Time line: by 2 nd / 15 th day of every month) SE, NRPC stated that 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 November, 2016 is placed on NRPC website. 3

4 Members were requested to submit the updated information on regular basis. (Action: SLDCs of UP, Haryana, Delhi and Rajasthan; Time line: 15 th day of every month) 5. Monitoring of schemes funded from PSDF(Agenda by NPC) Representative of NPC stated that in the 6 th meeting of NPC held on 19 th 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. Utilities were again requested in the meeting to submit the status of implementation of the above schemes (physical as well as financial progress) on monthly basis, in the prescribed format. The details as available with NRPC Sectt. are enclosed Annexure- II. The concerned utilities may submit the progress, physical and financial both, of implementation of these schemes on monthly basis. (Action: UPPTCL, PSTCL, HPSEBL, DTL, DHBVN/HVPNL, RVPNL; Time Line: 10 th Day of every month) 6. Information about variable charges of all the generating units in the Region. As per decision taken in 103 rd OCC meeting, all generating entities were 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 as submitted by utilities from April to February 2017 are available on NRPC website. All SLDCs and generating entities were requested to furnish the variable charges on regular basis. (Action: All SLDCs and Generating Entities; Timeline: by 8 th day of every month) 7. Sub-stations likely to be commissioned in next 6 months. As decided in the 108 th 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 available status of the sub-stations to be commissioned by POWERGRID in the states of NR and the status of down-stream assets of the concerned STU has been uploaded on the NRPC website. 4

5 In the meeting POWERGRID NR-1&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. POWERGRID NR-3 had submitted the details of the Transmission Elements expected to be commissioned in the next six months. The same is uploaded on NRPC website. UPPTCL was requested to submit the status of the downstream network from the POWERGRID sub-stations including Orai & Aligarh. RVPN was also requested to submit the status of the downstream network from the POWERGRID sub-stations including Ajmer & Chittorgarh situated in their state. PTCUL updated the status regarding down-stream network from the POWERGRID sub-station in their state which is available on NRPC website. OCC advised all the members to expedite the down-stream network to ensure optimal utilisation of transmission assets and to obviate system constraints. (Action: POWERGRID NR-1&2, all transmission utilities; Time line: ) 8. Cleaning and Replacement of porcelain insulators: The updated status as submitted by utilities regarding the cleaning of insulators/replacement of porcelain insulators has been uploaded on the NRPC website. All the members were requested to submit the progress of the work of cleaning of insulators/ replacement of porcelain insulators in the previous month. All the utilities including POWERGRID were again requested to specifically submit the detailed status of Replacement of Porcelain Insulators as outages for a number of lines had been taken for the insulator replacement work during recent months. (Action: All transmission utilities; Time line: ) 9. Recommendation of Enquiry committee for grid disturbances on 30 th July, 2012 & 31 st July, 2012: Discussions on implementation of recommendations: Recommendations pertaining to operational aspects made by the Enquiry committee for grid disturbances on 30 th July, 2012 & 31 st July, 2012 are as under: 9.1 Healthiness of defense mechanism: Self- certification (i) It was decided in the 27 th meeting of NRPC held on 30 th 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 31 st meeting of NRPC held on 5

6 that the quarterly test report of UFR and df/dt would be uploaded on the website of respective SLDC. All utilities were stressed to maintain the healthiness of the UFR Relays in view of the upcoming summer months. Also all utilities were asked to ensure that the Report of testing ending March 2017 is submitted in the next OCC Meeting. (Action: All transmission utilities; Time line: ) (ii) In earlier meetings, BBMB had informed that conversion 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 procurement of new relays was in final stage and the order will be placed by first week of April PSTCL informed that the relay had been repaired and the same will be installed positively in the next one week. (Action: HVPNL, PSTCL; Time line: ) (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 decided that PTCUL should expedite the work and submit the updated status and the target date for completing the work. (Action: PTCUL; Time line: ) 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 30 th 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. This exercise was to be completed by and thereafter repeated regularly at half yearly intervals i.e. on 1 st January and 1 st July of every year. All SLDCs were requested to submit copy of SLDC s advice to their STUs, even if no constraints were observed. In the 132 nd OCC meeting, it was noted that all utilities had submitted the report ending December All the members were requested to submit the 6

7 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 UPPTCL, RVPNL and PSTCL had submitted the information. OCC was apprised that feedbacks of some SLDCs were sent to CEA for considering in transmission planning. It was also deliberated that SLDCs should give more details in feedbacks in line with the operational feedback being submitted by NRLDC to planners. OCC advised all the SLDCs to submit the next half yearly feedback with more details in line with the feedback by NRLDC. (Action: DTL, PTCUL, HPSEBL, HVPNL; Time Line: ) 9.3 Installation of adequate static and dynamic reactive power compensators Based on the studies carried out by POWERGRID for identifying compensation required in intra-state network at 220 kv level, discussions in the 29 th 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 1 HINDAUN 125 RVPNL Updated Status in 133 rd OCC Expected MANESAR 125 POWERGRID Expected by MERTA 125 RVPNL Expected by by 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 29 th meeting of NRPC held on 13 th September 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 dated 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. 7

8 The report was discussed in 34 th TCC/38 th NRPC meeting held on 24 th /25 th 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. In this meeting, Delhi representative informed that the review would be completed by On the query raised by some utilities regarding quantum of reactive compensation required, keeping in view recent installation of reactors, it was clarified that the data for study by POWERGRID was taken from respective utilities. Thus, utilities should be aware that, which reactor has been taken into account in the study. It was also emphasized that the report had already been approved by TCC and NRPC in October,2016. There should not be any doubt regarding the reactors proposed in the study report by POWERGRID. It was suggested that in case of any query regarding the report, the concerned utility should directly take up with POWERGRID. OCC advised all the members to submit action plan for installation of reactors, as approved by NRPC, at the earliest. (Action: POWERGRID, UPPTCL,DTL,PSTCL, RVPNL,PTCUL; 10. System Protection Schemes (SPSs) in Northern Region: 10.1 SPS for Interruption of import by NR at 765 kv Agra (from WR). Review of SPS for 765 kv Agra-Gwalior line Time Line: ) The revised SPS for contingency of 765 kv Agra-Gwalior was approved in 32nd TCC/36th NRPC meeting held on 23rd /24th December, 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 129 th OCC POWERGRID stated that the scheme would be commissioned by In the 132 nd 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 129 th 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 8

9 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 129 th 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 this 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 August/September NRLDC representative stated that all out efforts should be made to complete the work before Paddy season, as per earlier schedule of implementation. ( Action: POWERGRID; Time line: May,2017) In the 132 nd OCC meeting, it was informed that during the mock testing of this SPS, at Jamsher the signal was received but the counter did not increase. In this meeting, POWERGRID representative submitted that the needful action has been taken at Jamsher. Regarding mapping of feeders identified for the SPS load relief, in SCADA, it was noted that there was no progress. OCC advised all concerned utilities to take action in this regard at the earliest and inform the action taken/action Plan. (Action: All STUs; Time line : ) UP representative raised issue of DTPC defect at Muzaffarnagar. POWERGRID representative stated that the issue would be looked into and would be resolved shortly. (Action: POWERGRID; Time line : ) 10.2 SPS for ICTs at 765 kv Unnao sub-station: A discussion was held on 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 34 th TCC/38 th NRPC meeting held on 24 th /25 th October, 2016 UPPTCL informed that LOA would be placed on and scheme would be implemented in 03 months thereafter. 9

10 Representative of UPPTCL intimated in this meeting that the scheme will be implemented by SPS for Kawai-Kalisindh-Chhabra generation complex: (Action: UPPTCL; Time line: ) SPS for Kawai-Kalisindh-Chhabra generation complex recommended in 122 nd OCC meeting held on 22 nd April, RVPNL, vide dated 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 34 th TCC/38 th NRPC meeting held on 24 th /25 th October, 2016 wherein RRVPNL stated that feeders have been identified and the scheme would be completed by March In the 129 th OCC representative of Rajasthan intimated that, the part of the scheme related to load shedding would be completed by March, In 131 st 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 this 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. As regard 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. 10 (Action: RVPNL; Time Line: ) 11. System Study for Capacitor Requirement in Northern Region for the year and The matter was discussed in 34th TCC and 38th RPC meetings, held on 24th & 25th Oct, It was decided that LOA should not be cancelled and the study should be carried out for the year and through CPRI. It was also decided that all the states would submit the data by for carrying out study for the period Subsequently, the data would be submitted for carrying out study for OCC was again apprised that data for had been received from all the utilities and the same was already sent to CPRI. It was also informed that CPRI

11 had sought some clarification regarding UPPTCL data, due to which CPRI could not carry out study. Matter was taken up by NRPC Sectt. with the concerned UPPTCL officials, but the information was pending. In the meeting, UPPTCL representative assured that the requisite information would be sent to CPRI on the same day. 11 (Action: UPPTCL; Timeline: Immediate) With regard to data for capacitor Study for , it was noted that the same had been received from Haryana, Rajasthan, Punjab and Himachal Pradesh. OCC directed PTCUL, UPPTCL & DTL to submit the information for the year , at the earliest, so that study would be carried out by CPRI. ( Action: PTCUL, UPPTCL & DTL; Timeline: Immediate) 12. Status of data trough Automatic Meter Reading (AMR) In the 13 th NRPC meeting held on 27 th 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 34 th TCC meeting, held on 24 th 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 TCC and NRPC expressed concern over tardy progress of the implementation of AMR. The issue is being discussed regularly in OCC meetings. In the 132 nd OCC meeting, POWERGRID informed that the work would be completed by March POWERGRID updated that the work is targeted to be completed by April (Action: POWERGRID; Time line: ) 13. Planning, procurement and deployment of Emergency Restoration System. The issue was discussed in the 33 rd meeting of NRPC held on and it was suggested that CEA should evolve guidelines regarding ERS. Later, Secretary (Power), GoI vide letter dated 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 30 th TCC & 34 th NRPC meetings held on 19 th & 20 th March, The matter was discussed in 34th TCC and 38th RPC meetings, held on 24th & 25th Oct, The latest status as updated by the members in this meeting is as under:

12 DTL:-Order had been placed for 02 nos. of ERS. Supply expected by May, PSTCL:- The tendering under process. UPPTCL:-Order for 02 nos. of ERS has been placed. Supply is expected by RRVPNL:-Proposal pending with management. HVPNL:-In place of ERS, spare towers worth Rs. 2 Crore would be procured. PO issued in this regard. PTCUL-Tender is under process. HPSEBL For exploring potential use of ERS in hilly state like H.P., vendors were invited but there was no response BBMB:-Partner states have agreed to provide the ERS as and when required by BBMB. OCC noted the information. 14. Targets fixed for Load Relief from operation of df/dt & UFR relays in Punjab Review thereof This agenda item was brought in the 127 th OCC meeting by PSTCL. In short, PSTCL had contended that variation in their load from summer to winter was such that they were not in a position to meet targets of automatic load shedding under UFR, df/dt and SPS. In the 127 th OCC meeting, it was informed that the issue was deliberated in 5 th NPC meeting held on 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 127 th OCC meeting 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 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 (Action: DTL, UPPTCL,PTCUL; Time line: ) 12

13 15. Transmission System Outage planning up gradation: In the 130 th 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 website htpp:// 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:// 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 by , positively. It was also deliberated that if data is not provided by the utility, then OCC would not discuss the outage. 16. High Transmission Losses in Northern Region: (Action: All Transmission Utilities; Time line: ) In the 131 st OCC meeting NRLDC informed that weekly average transmission losses of Northern Region were increased substantially, as compared to normal range of 3 to 4%. The probable reasons for such high transmission losses could be due to various reasons including incorrect CT/PT ratios of the meters and/or non-incorporation of some drawl points in the metering / SCADA system of NRLDC. The state-wise list of meters at drawl points along with their C.T./ P.T. ratio were enclosed as Annex-AA of 131 st OCC additional agenda. All utilities States were requested to examine their transmission losses, CT/PT ratio and drawl points within their jurisdiction and submit a report to NRLDC and NRPC secretariat by PSTCL submitted the report. OCC requested that all other utilities should submit report even if everything is found to be in order, within 15 days positively. 17. Certification of Non-ISTS line for inclusion in PoC Charges Central Electricity Regulatory Commission (Sharing of Inter State Transmission Charges and Losses) (Third Amendment) Regulations, 2015 provides as under: Certification of non-ists lines carrying inter-state power, which were not approved by the RPCs on the date of notification of the Central Electricity Regulatory Commission (Sharing of Transmission Charges and Losses) Regulations, 2009, shall be done on the basis of load flow studies. For this 13

14 purpose, STU shall put up proposal to the respective RPC Secretariat for approval. RPC Secretariat, in consultation with RLDC, using WebNet Software would examine the proposal. The results of the load flow studies and participation factor indicating flow of Inter State power on these lines shall be used to compute the percentage of usage of these lines as inter State transmission. The software in the considered scenario will give percentage of usage of these lines by home State and other than home State. For testing the usage, tariff of similar ISTS line may be used. The tariff of the line will also be allocated by software to the home State and other than home State. Based on percentage usage of ISTS in base case, RPC will approve whether the particular State line is being used as ISTS or not. Concerned STU will submit asset-wise tariff. If asset wise tariff is not available, STU will file petition before the Commission for approval of tariff of such lines. The tariff in respect of these lines shall be computed based on Approved ARR and it shall be allocated to lines of different voltage levels and configurations on the basis of methodology which is being done for ISTS lines. 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 was carried out for UP, Haryana and Rajasthan. The transmission lines, which fulfill the criteria recommended by the group and are to be recommended for certification as ISTS for the current Financial Year by NRPC Secretariat are listed below: S. No Name of Transmission Line 220KV PGCIL Panchgaon-Mau D/C line 400KV NTPC Jharli-Daultabad D/C line 400KV Sec-72 PGCIL-Daultabad D/C line 400KV CLP(Jhajjar)-Dhanonda D/C line 400kV S/C Jodhpur-Merta Line-I 400kV S/C Jodhpur-Merta Line-II 400kV S/C Merta - Ratangarh Line 400kV S/C Merta - Heerapura Line 220kV D/C Aau Baithwasia Line 220kV D/C Baithwasia Bhawad Line 220kV D/C Badisid- Aau Line 14 Owner STU HVPNL HVPNL HVPNL HVPNL RVPN RVPN RVPN RVPN RVPN RVPN RVPN

15 kV S/C Bhadla- Bap Line RVPN The complete list of transmission lines submitted by STU can be sub-divided in following categories: (i) (ii) (iii) (iv) Transmission lines, which fulfill the criteria recommended by the Group and hence are recommended to be certified as ISTS. Transmission lines, which do not fulfill the criteria recommended by the Group and hence may not be certified as ISTS. 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 modeling the lines in PoC transmission charge study rests with STU concerned. The transmission lines which are natural inter-state lines and hence need not to be certified as ISTS by RPC. The complete category wise list of transmission lines submitted by STUs was enclosed at Annex- I of the Agenda of this meeting. UP representative raised the issue of non-certification of 400 kv Sultanpur-PGCIL (Kursi Road) line for which the average utilization by the States other than UP was 49.9%. It was clarified that as per the agreed methodology, for qualification as ISTS, average utilization by other states should be more than 50%. Thus, this line did not meet the criterion. Up representative had also raised the issue of certification of STU lines being used to deliver share of other states from ISGS embedded in UP. He cited following provision in Central Electricity Regulatory Commission (Sharing of Inter State Transmission Charges and Losses) (Third Amendment) Regulations, 2015: "(vii) In case an ISGS is connected only to STU network and the shares of the beneficiaries of the said station are being delivered through the STU network, such a line of the STU network shall be considered as an ISTS for the purpose of these regulations. After detailed deliberations, OCC decided that since, as per CERC Regulations, such lines are to be considered as ISTS, these lines do not come under the purview of RPC for certification as ISTS lines. Rajasthan representative had raised that some of the lines, which were proposed for certification by them, were not included in the list given in the Agenda. On a query, he assured that details would be provided to NRPC Sectt. 15

16 OCC after detailed deliberation recommended for approval of NRPC the non- ISTS lines mentioned in the table given above, for certification as ISTS lines for the year Review of Grid Operations for last month (Feb2017) Representative of NRLDC made a presentation on grid operation during Feb, 2017 and highlighted the following:- Frequency of the grid remained within the normal band 73.98% of the time during February, 2017 which is better than last year during same month (February, 2016) when frequency (within normal band) remained % of the time. It was emphasized that since almost a year now (except for few days), % of time operation of grid in normal band is remaining only about 70% of time,therefore NRLDC again requested all utilities to take concerted efforts to further improve the frequency regime through various measures viz. staggering of load connection/disconnection, better scheduling, keeping reserves and effective primary response by the generators etc. Maximum load met & minimum load met for the region during February, 2017 was MW and MW respectively. The maximum and minimum frequencies were Hz and Hz., respectively. Average consumption of the Region for February, 2017 increased just by 3.84% of corresponding month in previous year. Average Thermal generation in February, 2017 was decreased 3.89% (21 MU/Day) of corresponding month in previous year. Average Hydro generation in February, 2017 increased by 13.93% (15MU\day) of corresponding month in previous year Average nuclear generation in February, 2017 increased by 4.08 MU/day as compared to corresponding month in previous year. Average renewable generation in February, 2017 increased by 3.42 MU/day as compared to corresponding month in previous year. Net Average Inter-Regional import was increased by MU/day during February, 2017 as compared to corresponding month in previous year. Net Average Import from remained same in February, 2017 as compared to corresponding month in previous year. Net Average Import from ER increased by approx MU/day during February, 2017 as compared to corresponding month in previous year. Net Average Export to NER was 10 MU/day during February, Total availability during February 2017 was MU/day. Total outages during Feb, 2017 were 491 including Planned S/downs (280) and Forced Shut /downs (Trippings-145+Emergency S/Ds-66). Different 765/400 kv Transmission lines were manually opened/ tripped (971times) on high voltage conditions during February, The difference between data, received from SCADA and SEM in terms of %age was shown as Haryana (0.33) Punjab (1.72), Rajasthan (4.25), Delhi (5.9), Uttrakhand (1.05), UP (1.41) & UT Chandigarh (2.46). Rajasthan was advised to look into the matter. 16

17 Maximum deviation was observed in HP followed by Uttrakhand, UP and Haryana during February, 2017.These utilities were requested to review their load and accordingly minimize their deviation. The load pattern of the states in which elections held, were discussed. It was noted that in some states there was substantial load reduction on the day of election. It was suggested that States may analyse such events and use the results in fine tuning the load forecast during such special days, which would help states in managing the load-generation balance. Transmission losses since week no. 35 were quite high. All utilities were requested to review their transmission losses, drawl point and CT/PT ratio. All utilities were again advised to look into the matter and report so that the reasons can be analyzed. Number of transmission element trippings, for POWERGRID followed by UP, and Rajasthan, were high. The OCC advised the representative of these transmission utilities to look into these and take necessary action to reduce such tripping. The details of the Generating Stations and Transmission Elements that are in Long Outage were also discussed (ANNEXURE-B). All the concerned utilities were requested to update the target date by which these generating units /transmission elements would be operational.occ advised concerned utilities to bring back these elements at the earliest. Some constituents were uploading data for estimated demand, regularly, on FTP server of NRLDC, while some constituents were not uploading data regularly or sending in different formats. All SLDCs were requested to upload the data regularly on the server. As discussed during 130 th OCC meeting, the usage of space technology could be very helpful for power sector and all constituents should make use of it. Ministry of Power (MoP) is also putting lot of emphasis on the utilization of space technology data. Some of these decisions at MoP level are as follows: All Power Sector Organizations were directed to prepare specific target oriented projects along with timelines and expected outcomes. Directive is for all Ongoing projects as well as new emerging areas POWERGRID is nodal agency for compilation of Road Maps and onward Submission to MOP. MOP to monitor the progress of achievement. Silt Level forecast in Hydro Power Plants. Disaster support services to Ministry of Power Contact Person in NRSC, ISRO Hyderabad: Dr. C. S. Jha OCC again advised all utilities to take advantage of above and take help in inflow, silt forecasting for hydro stations as well as load forecasting based on weather conditions. The list of elements charged in the month of February 2017 is placed at ANNEXURE-C. 17

18 19.Summer Preparedness 2017 In view of coming summer month, which is peak demand period of Northern region, OCC discussed about the load generation balance planning of all the state constituents during upcoming summer month. NRLDC stated that with the temperature rise, load would start picking up and respective line loading, Voltages, frequency, drawl from the grid should be kept within operational limits to maintain the grid security. OCC advised all entities to start summer preparedness and suggested that all the utilities should formulate their action plans for following: Change in load-generation balance Skewed load profile Voltage profile, Inter-regional exchanges Import capability of state control areas, Weather beating load (higher loads) Thunder Storm/dust storm leading to Load crash, tower collapse etc. Managing outage of plants due to Silt conditions The detailed agenda on above points was discussed during 132 nd OCC meeting wherein all the entities were requested to share the action plans, preparations and related information on the above for discussion and adaptation Power Supply Position OCC discussed that as load of Northern region remain highest during summer/monsoon, load generation balance/power supply position planning on monthly basis is very crucial for grid management. OCC directed all the state to forecast the load and availability during the summer month as under: Load forecast (Peak & off peak) Own generation availability Availability from Central sector generating stations, banking & bilateral arrangements Short term arrangements Shortages, if any In the OCC meeting the last year Demand profile vis-à-vis the expected Demand scenario worked out by NRLDC was also discussed. The 18

19 anticipated Power Availability and shortages for different states was also highlighted. It was emphasised that the states of UP, Punjab, J& K and Haryana may experience shortage of power. It was deliberated that advance planning should be done to meet the demand these states. All the states utility of Northern region were advised to anticipate its load for upcoming month, availability of own generation, short term arrangements etc. and share the respective action plan for meeting the projected load. It was deliberated that in view of Power availability and various short term products, load forecasting has become pre-requisite for all states to manage their portfolio. Hence, focus should be on forecasting, network congestions, network adequacies etc. Maximizing the internal generation in view of foreseen congestion of interregional corridor: Import from WR used to be higher and the import capability from WR is limited. In case of summer scenario, as the load of northern region increases, import also increases. Therefore, in order to reduce the congestion on inter-regional corridor, keeping machines on bar within NR and maximizing internal generation as and when required is necessary. Gas diversion to NR is also part of increasing the internal generation within NR. OCC advised all utilities to take necessary steps to ensure maximizing of Internal Generation to reduce the congestion on inter-regional corridor. It was emphasized that maintaining load-generation balance and grid security should be given priority over financial issues Maintenance of reserves: Sudden outage of large hydro on silt, or tripping of large generating station of state control area or tripping of regional entity generator, some sort of reserves should be maintained to balance the load generation of the region. OCC directed all utilities to take necessary steps for following:. Maximizing the internal generation & Maintenance of reserve. Keep the optimum generation on bar.ramp up/down the generation as and when required 19.3 Assessment of respective state control area TTC/ATC: It was deliberated that in line with CERC regulation and procedures on congestion management, state control area should compute its import capability in co-ordination with NRLDC. In view of peak demand scenario of NR and skewed loading, all the states were requested to assess its state control area TTC/ATC for upcoming summer month in advance in following manner: i. Updating of base case 19

20 ii. iii. iv. Projected load generation balance New element that has been commissioned & synchronized Network configuration (line kept opened, Bus split etc.) Assessment of TTC/ATC & RM as per CERC approved methodology Report stating TTC/ATC, Constraints Action plan for the constraints observed NRLDC presented the TTC/ATC of respective state control areas as per the data available at NRLDC. TTC/ATC of the state of NR and the constraints for summer scenario is given below: S.No. State TTC/ATC (MW) Constraints observed 1 Punjab ~6400 N-1 contingency of Amritsar, Ludhiana, Makhu, Dhuri ICTs. 2 Haryana ~6500 N-1 contingency of Kaithal. Gurgaon ICTs, 220kV network around Hisar; Hisar(PG)-Hisar(IA) &220kV Charkhi Dadri-Lula Ahir 3 Rajasthan ~6200 N-1 contingency of Sikar, Jodhpur, Merta ICTs. N-1 contingency of 765/400kV Phagi ICTs, 400kV Bassi- Phagi ckts 4 Delhi ~ N-1 contingency of Mundka, Bamnoli, Harshvihar ICTs and its underlying 220kV network 5 Uttar Pradesh ~7500 N-1 contingency of Agra (UP), Mainpuri (PG), Meerut (PG), Muradnagar(UP), Sultanpur(UP) and 20 underlying network. 400/220 kv Gr. Noida: Underlying 220kV network. Low voltages: 400kV Agra (UP), Muradnagar (UP), Muradnagar New(UP), Sultanpur & several 220kV nodes. 6 Uttarakhand ~1600 N-1 contingency of Kashipur and 220kV lines of Roorkee interconnection, Baikunthpur- Panthnagar etc. 7 Himachal ~1050 N-1 contingency of 220 kv Pradesh Madanpur-Kunihar leads to the overloading of 220 kv Baddi-Kunihar. Loading on 220/132 kv Kunihar, Hamirpur and Jassore ICTs

21 8 Jammu & Kashmir ~1800 N-1 non-compliance of Wagoora ICT, underlying 220kV network of Wagoora, Kishenpur) The TTC/ATC of each state and the constraints in the state network were discussed in detail. OCC advised all members to calculate the TTC/ATC for respective state and share with NRLDC as well as NRPC Sectt. (Action: All STUs/SLDCs; Time line ) It was also advised that action plan must be prepared by all SLDCs to maintain load-generation balance, in consultation with Discoms and STUs, considering the available ATC and the constraints in the State network and submit to NRLDC and NRPC Sectt. (Action: All SLDCs; Time line: ) All the State utilities were advised to limit the drawl from grid within the ATC limits Weather Monitoring & Load forecast NRLDC representative stated that Weather monitoring is an important factor in estimating the load forecast in both short term / long term period. Monitoring of weather information therefore also help in better load portfolio management. OCC advised that apart from IMD website links, temperature and humidity telemetry from various substations should be monitored at SLDCs for better information of local area weather. (ANNEXURE-E). OCC also suggested all the users to explore the available tools e.g. weather monitoring website/link, historical weather information and respective load, SCADA telemetry of temperature and humidity etc. in assessing the load behavior/load pattern of respective state control area. It was highlighted that in the last summer season 4 events of Load crash in NR had occurred. During these events the load crash was to the tune of 8500 MW to MW and EHV lines had tripped. To deal with thunder storms/dust storms, load crash following actions were discussed and agreed upon: 1. Backing down of generation in minimum possible time. 2. Identification of 11kV feeders that can remain connected during thunderstorm/wind storm, in line with decision in the meeting dated 23 rd June 2016, taken by JS,MoP. 3. Avoiding manual tripping of distribution feeder or LV lines. 21

22 4. Strengthening of transmission lines towers. 5. Keeping Emergency Restoration System (ERS) ready for any eventuality. OCC expressed concern regarding delay in identification of 11 KV feeders that can remain connected during such eventualities, in spite of repeated requests. OCC advised all the SLDCs to identify such feeders in consultation with respective DISCOMS and submit the details to NRLDC and NRPC Sectt latest by Hydro Generation and Silt monitoring (Action: All SLDCs & DISCOMS; Time line: ). OCC discussed optimal utilization of hydro generation during summer as it is known, that most of the hydro station of NR are snow fed and inject its peak generation during summer/monsoon scenario. In view of above, OCC recommended that any kind of maintenance in Generating station/units/associated transmission line etc. should be completed at the earliest. As already discussed in previous OCC meetings, it was again stressed that following action should be taken by respective agencies: Actions by Generator Better forecasting and silt monitoring Avoid sudden shut down of generation Reduction of Generation/Tripping of Units as per protocol (Staggering of generation outage) Actions by SLDC/Constituents Generation reserve to be maintained Hot Reserves Cold reserves Contracted Generation from Other surplus entities/traders Load management to be planned Silt forecasting with the help of ISRO 19.6 Reactive Power Management NRLDC highlighted that during summer as the load increases, reactive power drawl also increases which causes voltages to drop. To maintain the voltage profile of Grid within IEGC band during summer, following actions that has already been suggested and discussed during previous OCC meetings were reiterated as given below: Switching on Capacitors Switching off Reactors 22

23 Dynamic reactive support from Generator as per its capability curve. Tap Optimization at 400/220kV ICTs by NRLDC and 220/132kV ICTs by respective state control area based on scatter plots of ICTs, offline studies, NRPC RE account etc. Synchronous condenser operation SCADA Displays of capacitors and Reactors for better visualization 19.7 Defense mechanism Existing defense mechanism as recommended by various committees and its importance had been discussed in many previous meetings. These defense mechanisms cover protection from under voltage, under frequency, rate of change of frequency, SPS for line/icts loading/generator complex evacuation etc. OCC has recommended and directed all to implement and keep in healthy condition all these mechanism as per approved settings. NRLDC representative stated that during summer months (high demand period) UVLS plays an important role to prevent cascade tripping on sinking of voltage. During low voltage, UVLS relay disconnects pre-identified feeder to shed the load to control the low voltage. OCC decided that as the system size is increasing, role of UVLS relay is significant in Grid stability during low voltages in the system. Therefore, UVLS data and monitoring of status of UVLS similar to UFR or df/dt is also necessary. NRLDC presented the updated status of UVLS, available with NRLDC: State Uttar Pradesh Punjab Uttarakhand Delhi Rajasthan Nos of locations* Voltage set (kv) Delay in Second Load relief (MW) Status ( ) No 3 (220kV Moga, Malerkotla & Bahadurgarh) 1 (220kV Rishikesh) 1 (400kV Bamnoli) 3 (132kV Mandan, K.G.Bas & 220kV Neemrana Details Received (185MW load relief) No No 90% of Normal voltage 30 15,22 &30 No 23

24 OCC recommended the following based on above deliberation: Instantaneous tripping for UVLS operation needs to be corrected with minimum 5 second time delay. Voltage setting for UVLS needs to be corrected in UP. All the utilities shall submit the UVLS details of their system in the prescribed format OCC also advised all state control area/users to ensure that their protection and defense system are in working conditions and settings are as recommended. In addition, all states/user shall update changes or modification if any carried out in the information submitted earlier. In addition, OCC suggested reviewing the various Islanding Scheme of states (Delhi, Rajasthan, Haryana & Uttar Pradesh) for upcoming summer month as per anticipated load/generation. States/Generators were advised to suggest changes or action plan, if any, for modification in existing islanding schemes to NRPC Telemetry and Visualization OCC discussed and advised all the members for following action: a) Ensure telemetry & wide observability b) SCADA displays updating/ Correctiveness c) Important document updating and availability at control room 19.9 Protection and Transmission System pre-summer maintenance i. Avoiding tripping of transmission elements during higher loading ii. Reviving the elements under outages iii. Expediting new elements to be commissioned iv. Faster clearance of faults OCC discussed on the above issues and directed all concerned utilities to take requisite action. 20. SPS for HVDC Champa- Kurukshetra Line : NRLDC representative informed that +/- 800KV HVDC Bi pole between Champa Pooling Station (Western region,chattisgarh) - Kurukshetra (Northern region, Haryana) line (with provision to upgrade HVDC terminal to 6000MW at later date) was under trial testing since Feb-Mar 17. It is an inter-regional HVDC link between WR (Chattisgarh) and NR (Haryana). Following are the associated transmission network of WR - NR HVDC Interconnector for IPP Projects in Chattisgarh (WR) & Trans. System Strengthening in NR for IPP Projects in Chattisgarh. 24

25 S.No. WR NR 1 HVDC Rectifier Module of HVDC Rectifier Module of 3000MW 3000MW capacity at Champa capacity at Kurukshetra kv Champa pooling station 400/220KV Kurukshetra S/Stn. (GIS) MVA KV D/C Champa Pooling station Raipur Pooling Station line 400KV D/C Kurukshetra - Jallandhar line (Quad) (one ckt vis 400/220KV Nakodar(PSTCL) S/Stn.) KV S/C Champa Pooling station - Dharamjaygarh/ near Korba Switching Station KV S/C Raigarh Pooling Station(Near Kotra)- Champa Pooling station line 400KV D/C Kurukshetra - Jind line (Q) 400 kv D/C Kurukshetra-Malerkotla Line KV D/C Raigarh Pooling 400 kv D/C Malerkotla-Amritsar Line station (Near Kotra) - Raigarh Pooling station (Near Tamnar) 7 LILO of Abdullapur - Sonepat 400KV D/C at Kurukshetra (Triple) At present, HVDC Champa Kurukshetra Bipole is for 3000 MW power transfer from Champa Pooling to Kurukshetra substation (pole-1 is under commissioning at present). Associated transmission network at 765 & 400kV in NR has already been commissioned and synchronized. In view of important HVDC link between WR-NR, N-1 or N-1-1 contingency of this bipole should also be planned. It was also informed that at present, inter connection of WR & NR is as: S.No AC link S.No. HVDC link kV Gwalior-Agra-1 1 HVDC Vindhyachal B-t-B (2 250 MW) 2 765kV Gwalior-Agra-2 2 HVDC Mundra-Mahindergarh Bipole (2 1250MW) 3 765kV Gwalior-Phagi-1 3 Upcoming Champa-Kurukshetra Bipole ( MW) 4 765kV Gwalior-Phagi kV Sujalpur-RAPP-C 6 400kV Zerda-Kankroli 7 400kV Zerda-Bhinmal 8 220kV Morak-Badod 9 220kV Morak-Kota kV Malanpur-Auraiya kV Mehgaon-Auraiya Under N-1 or N-1-1 contingency of this pole, it would result in overloading of already stressed 765kV Gwalior-Agra/Phagi ckts. In order to take automatic 25

26 action for such bulk power carrying HVDC outage, a SPS must be designed with its implementation. NRLDC representative shared the sensitivity of HVDC Champa-Kurukshetra on the inter-regional links of NR based on system studies as given below: - Sensitivity Champa - Kuruksherta - on WR-NR about 60-70% - on ER-NR about 30-40% - Sensitivity of 765 kv Agra-Gwalior among WR-NR is again about 60% Thus tripping of Champa-Kurukshetra pole -1 with 1500 MW loading would result in about 1000 MW increase on WR-NR as well as about 500 MW on ER-NR corridors. This approximates to about MW increase on 765 kv Agra-Gwalior lines. As 765 kv Agra-Gwalior links already have flow based SPS, this SPS would cater to the single pole tripping of Champa- Kurukshetra also. However, with the outage of Champa-Kurukshetra, situation would revert back to present conditions and therefore TTC/ATC of NR import would need to be revised immediately. All the utilities would have to take immediate action to reduce drawal (also by increasing internal generation) under such situation. He added that as commissioning of SPS also takes lot of time, it is better to strengthen SPS for 765 kv Agra-Gwalior lines. After detailed deliberation, it was decided that revised SPS of 765 kv Agra- Gwalior D/C line should be expedited and the work of design and implementation of SPS for 3000 MW Champa Kurukshetra Bipole should be initiated. ( Action: POWERGRID NRLDC; Time line: Immediate) 21. Augmentation of Transformer capacity at Dehar BBMB: NRLDC representative stated that in line with approval of Standing Committee on power system planning, augmentation of Transformer capacity was done at Dehar (BBMB) by replacing old ICT of 250 MVA(ownership with BBMB) with 315 MVA ICT(ownership with POWERGRID) by POWERGRID. Regarding this all pre charging documents were submitted by POWERGRID including SCADA and Protection undertakings as well as consent was conveyed by BBMB in compliance of CERC (IEGC) Regulations, 2010 and CEA (standard of Connectivity to the Grid) Regulations,

27 He added that after the completion of trial run of new ICT, NRLDC did not receive Disturbance Recorder and Event recorder data. POWERGRID had conveyed that as per old existing system there is no SCADA and event recorder. Non-availability of Event Logger and Disturbance Recorder is a violation of CERC (Indian Electricity Grid Code) Regulations, 2010 and CEA (Standards of Connectivity to the Grid) Regulation, The relevant provisions of IEGC and CEA are quoted below: IEGC Grid code clause 4.6.3: Recording instruments such as Data Acquisition System/Disturbance Recorder/Event Logging Facilities/Fault Locator (including time synchronization equipment) shall be provided and shall always be kept in working condition in the ISTS for recording of dynamic performance of the system. All Users, STUs and CTU shall provide all the requisite recording instruments and shall always keep them in working condition. As per Standards of Connectivity to the grid: Part 1 General Clause (7) Disturbance Recording and Event logging facilities: Every generating station and sub-station connected to grid at 220kV or above shall be provided with Disturbance Recording and Event logging facilities. All such equipment shall be provided with time synchronization facilities for global common time reference. BBMB informed that DR was already there. He assured EL would be installed within 3 months. BBMB detailed upon that it is in the process of integrating compliant Numerical Relays with the Siemens RTUs for recording the event in SCADA. (Action: BBMB; Timeline 15 th June,2017) 22. Multiple element tripping events in Northern region since last OCC meeting: NRLDC representative informed that a total of 15 grid events occurred since last OCC meeting. Out of these 15 events, 7 no. of events were of GD-1 category. The preliminary report of all the events had been issued from NRLDC. A list of all these events along with the status of details received was attached at Annexure-II of the agenda of this meeting. 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 regulations. 27

28 (Action: BBMB, POWERGRID, NHPC, PSTCL, RVPNL, UPPTCL, NTPC, HVPNL, APCPL, JSW (Karcham); Time line: Immediate) 23. Details of tripping of Inter-Regional lines from Northern Region for February 17: NRLDC representative informed that two inter-regional lines tripping occurred in the month February 17. The details were attached at Annexure-III of the Agenda of this meeting. 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 the not all information regarding the tripping was received from the utilities. OCC requested all the concerned utilities for taking corrective action to avoid such tripping as well as timely submission of the information. (Action: RVPNL, POWERGRID Time line: Immediate) 24. Frequency response characteristic: NRLDC representative informed that four FRC based event had occurred since last OCC meeting. The FRC had 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. Descriptions of the events are as given below: S.No. Event Date Time (in hrs) Event Description 1 21-Feb-17 15:59 Due to tripping of Kalisindh Unit-I & II the generation loss of 830 MW took place Feb-17 16:15 Kudankulam Unit-II generating 1000 MW went under house load Mar-17 01:57 Krishnapatnam Unit - 1 & 2 tripped Mar-17 15:14 Load rejection Test of unit II(1000 MW) Kudankulam Starting Frequency (in Hz) End Frequen cy (in Hz) Δf

29 NRLDC representative further mentioned that the Hon ble CERC approved procedure had already been shared with all concerned during previous OCC meetings. FRC observed for each state control area for the events is tabulated below: For past 27 FRC FRC events State Name Average Median 21-Feb- 23-Feb- 02-Mar- 05-Mar- FRC FRC PUNJAB 16% 8% 23% 0% 5% 36% HARYANA 29% 19% 5% 0% 23% 20% RAJASTAN 18% 9% 50% 6% 0% 44% DELHI 27% 19% * 33% 19% 31% UTTAR PRADESH 21% 10% * * 4% 37% UTTARAKHAND 18% 22% * * 23% 0% CHANDIGARH 33% 24% 37% 45% * * HIMACHAL PRADESH 18% 10% * 100% * 10% JAMMU & KASHMIR 8% 5% 33% 34% * * NR 19% 16% 29% 8% 3% 19% Major Thermal Generation in 8% 15% 27% 18% 8% 16% NR Major Hydro Generation in NR 5% 4% 2% 23% 1% 17% * Unreliable FRC due to SCADA data error or schedule change He informed that the Average FRC in line with the decisions taken during various OCC meetings, the time and date of the FRC events were ed to respective utilities. Concerned utilities were requested to submit the FRC of their control areas. OCC expressed concern over such continuous poor frequency response and stressed upon all utilities to take corrective measures. 24. Tripping of all line at Kurukshetra HVDC substation on high voltage protection: NRLDC representative informed that as reported, at 15:19hrs on , seven number of Filter banks inadvertently got connected due to mal-operation of control system (presently testing phase) leading to sudden injection of

30 MVAR.Voltage shot up to above 440kV resulting in tripping of all 400 kv lines at Kurukshetra on over voltage protection. He added that the over voltage settings for Stage-1 is having a time delay of 4 sec, while, the usual practice is to keep the grading in parallel or same station lines in the range of 5-6 sec and % of rated voltage. He suggested that logic should be revised so that at least 4-5 lines, preferably of lesser length, should remain connected. POWERGRID representative informed that the problem occurred due to some logic issue, which would be resolved before commissioning. He informed that Grading for some of the lines had also been done. He assured that action would be taken to avoid recurrence of the such events. (Action: POWERGRID; Timeline: ) 25. Unavailability of PLCC at GSS Sakatpura for 220Kv RAPP B-Kota Circuit In the 132 nd OCC meeting, NPCIL representative informed that RAPP B-Kota (circuit- II) PLCC was not available since last two years. End zone faults occurring in line were getting cleared in zone-2 time delay, instead of carrier aided trip. This also results in simultaneous tripping of RAPP B-C tie line at RAPP-C end on backup earth fault protection, in addition to RAPP B-Kota circuit-ii tripping in zone-2 time of 350msec. With outage of two evacuation lines with both generators in service, remaining three lines RAPP B-Chittor-I, RAPP B-Chittor-II & RAPP B-Debari becomes loaded. There is risk of cascade tripping of these lines and risk of both units outage due to offsite power failure. He added that RRVPNL informed that PLCC cards were faulty and needs repair / replacement and emphasized that PLCC issue should be resolved on highest priority to make PLCC available at GSS Sakatpura for 220kv RAPP-B-Kota ckt. In 132 nd OCC meeting, the matter was discussed in detail. The issue of ownership came up during the deliberations. RRVPNL was advised to submit information within 15 days. In this meeting, RVPNL representative intimated that the communication wing will restore the PLCC at the earliest. (Action: RVPNL Time line: ) 30

31 26. 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 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 ) shall have the LVRT capability. Regarding wind turbines commissioned before , CERC in order dated in Petition No. 420/MP/2014 LVRT had directed that LVRT should be implemented for all wind turbines (except Stall Types) commissioned before having installed capacity equal to or more than 500 KW. 31

32 In the 36 th 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 OCC 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. Additional Agenda ( Action: RVPNL, Time line ) AA1. Change in terminology used in power supply position reports. SE, NRPC informed about communication received from CEA, wherein was mentioned stated that Grid Management Division, CEA publishes the monthly Power Supply Position reports based on data submitted by state utilities through RPCs. These reports show state-wise details of demand of demand, supply and shortage of electricity in terms of energy and peak MW. Keeping in view ample un-utilized generation capacity in the country, demand-supply gap of electricity in various states cannot be attributed to non-availability of power in the present scenario. Accordingly, it is not considered appropriate to term the demand-supply gap and energy/peak shortage but energy not supplied/demand not met. Thus, the terms peak deficit and energy deficit appearing in various reports including power supply position reports are not reflective of the actual situation in the country today. CEA had conveyed decision to change the terminology used in Power Supply Position report w.e.f. January,2017(Revised) as under:- Energy Power Supply Position Report Energy Requirement (MU) Energy Supplied (MU) Energy not supplied (MU) (%) Peak Power Supply Position Report Peak Demand (MW) Peak Met (MW) Demand not met (MW) (%) OCC advised all members to take note of the decision and incorporate the changes in all the communications regarding power supply position including the monthly power supply position data in format 28 and 29 being furnished by SLDCs to NRPC Secretariat. ( Action: All SLDCs; Time line: Immediate) 32

33 T1: Table agenda by NAPS NAPS representative informed that NAPS Generating station combined with Harduaganj TPS is connected to NR Grid through 220 kv transmission lines emanating from NAPS & Harduaganj TPS Switchyards. Some of these lines have been LILOed by UPPTCL for fulfilling their requirements, namely; i) NAPS is connected to Moradabad by NAPS-Moradabad line has been made LILO at Sambhal. ii) NAPS is connected to Meerut by NAPS-Simbholi line. iii) NAPS is connected to Harduaganj TPS by NAPS-Khurja lines (D/C) out of two lines one has been made LILO at Dibai recently and NAPS-Harduaganj line LILOed at Atrauli. iv) Harduaganj TPS is further connected to Mainpuri by Hrduaganj- Maipuri lines (D/C), both lines have been made LILO at Etah and Sikandrarao respectively. He added that the above 220kV transmission lines between these generating stations are repeatedly opened at one or more LILO points simultaneously probably for load control and kept open for longer durations and also not being reported to NAPS authorities. This reduces the system stability especially in case of tripping of any other line connected at NAPS. The details are given below; i) NAPS are connected to Moradabad by NAPS-Moradabad line kept open either at Sambhal or Moradabad. ii) NAPS are connected to Harduaganj by NAPS-Harduaganj line is kept open at Atrauli. iii) NAPS is connected to Harduaganj TPS via Khurja lines(d/c) is also kept open at Dibai. iv) Harduaganj TPS is further connected to Mainpuri by Harduaganj-Maipuri line(via Etah) is kept open at Etah. v) Harduaganj TPS is further connected to Mainpuri by Harduaganj-Maipuri line (via Sikandrarao) is kept open at Sikandrarao. He stated that the practices for opening of interconnecting lines at one or more LILO points simultaneously is a serious issue resulting in weakening connectivity between various parts of grid system and generating station. It had been experienced in past that the opening of interconnecting lines resulted in transient and finally loss of generation at NAPS as well as Harduaganj TPS. UPPTCL representative assured that the issue would be resolved in coordination with NAPS. ( Action: UPPTCL; Time line: ) 33

34 Annexure 1 List of Participants in the 133rd OCC meeting held on Name Designation Organization Fax No. Phone/Mobile ID Kuldeep.S.Manderna Addl.SE/PC BBMB power@bbmb.nic.in/ Pecomml.inNRPC.rediffmail.com S.K.Mishra SM(E) NHPC skm.nhpc@yahoo.com Vijay Kumar E(E) NHPC vijay.kumar239@gmail.com R.D.Yadav STE(E&I) NPCIL rdyadav@npcil.co.in Prabhat Sharma SO/F NPCIL prabhat@npcil.co.in Sameer Rai SO/G-Operation NPCIL sameerrai@npcil.co.in Kamaldeep Dy.Mgr NRLDC kamal.jss77@gmail.com D.K.Jain Addl.GM NRLDC dkj2009@yahoo.co.in Rajeev Porwal DGM NRLDC rk.porwal@posoco.in P.K.Agarwal GM NRLDC pkagarwal@posoco.in V.Jolly Sr.Mgr NTPC vjollys@yahoo.com Rakesh Chopra GM(comml) NTPC rakeshchopra@ntpc.co.in Mohd.Zia AGM(OS),NRHQ NTPC mohdzia@ntpc.co.in P.K.Saini Sr.Mgr(OS) NTPC pksaini@ntpc.co.in D.Chakraborty Addl.GM PGCIL dchakra@powergridindia.com D.Kushwaha AGM PGCIL dkushwaha72@gmail.com Rajiv Mohan GM(AM)NR-III PGCIL rajivmohan@powergridindia.co.in S.C.Sharma Chief Manager PGCIL cpccnr1@gmail.com Praveen Kumar DGM PGCIL pkpowergrid@gmail.com Rajeev Agarwal Manager SJVNL rajeev_sjvnl@rediffmail.com Vishalakshi Malan Sr.Engineer THDC vishalakshi.malan@gmail.com Naveen Kumar AM(T),SLDC DTL naveen0634engg@gmail.com Sunilesh Mohari DGM(p/m) DTL smainforce@gmail.com B.L.Gujar Manager(T)Prot. DTL bl.gujar@dtl.gov.in S.K.Sinha DGM(T),SLDC DTL sinha.surendra@yahoo.com N.K.Makkar EE HVPNL nareshmakkar@gmail.com Er.K.S.Sambyal ASE(PC) HPPTCL pcshimla2003@gmail.com Er.Suresh Sharma AE HPPTCL sutu62@gmail.com Saleem Mohammad ASE/SLDC PSTCL ddpc_pseb@rediffmail.com V.K.Gupta AEN(SOLD) RVPNL se.ldrvpnl@gmail.com Atul Sharma EE(SOLD) RVPNL sharma.atul1@rvpn.co.in C.L.Koli SE(PP) RVPNL se-pp@rrvun.com M.M.Ranwa CE(RUVNL) RVPNL ceruvn@gmail.com Sanjay Kumar EE UPPTCL director)comm@upptcl.org Chaurasiya A.J.Siddiqui EE UPPTCL ajsiddiqui1962@gmail.com Brijesh Singh EE,VVNL UPPTCL brijeshere@gmail.com Kavindra Singh Tech.Advisor UPPTCL skavindra@yahoo.co.in P.N.Upadhyaya CE(SLDC) UPPTCL cesldccomm@upptcl.org B.K.Jha SE(O) UPPTCL director_op@upptcl.org Chnadra Mohan D(O) UPPTCL Dheeraj Jain DGM(comml) APCPL dheerajjain@ntpc.co.in Manoj Taunk GM AD Hydro manoj.taunk@adani.com P.S.Mhaske MS NRPC Hemant Pandey SE(S) NRPC B.S.Meena EE(S) NRPC K.N.Rao Chf.Mgr NRPC Sonia Chauhan ASE NRPC Akshay Dubey AEE NRPC Satyendra Prakash AGM(T)-COS IPGCL-PPCL spmprakash@gmail.com

35 ( Amount in Rs. Crores) As on State / UT No. of Schemes Scope of Work (Scheme) Approved Cost Grant Sanctioned Date of Sanction Funds Released % of fund Disbursed against grant Sanctioned Status Sr. No. State / UT 1 Jammu & Kashmir 3 Himachal Pradesh No. of Schem es 2 2 Punjab 2 Scope of Work (Scheme) Renovation and Upgradation of protection system in the substations of Jammu. Renovation and Upgradation of protection system of substations in Kashmir area. Installation of Bus bar protection scheme in the state of Punjab Provision of second DC Source at 220 kv & 132 kv Grid Sub Stations of PSTCL 1 Renovation and Upgradation of Protection System of substations of HPSEBL. 4 Uttrakhand 1 Renovation and Upgradation of Protection System of substations in PTCUL. 5 Haryana 1 Renovation and Modernization of distribution system of DHBVN, Haryana. Annexure-2 NORTHERN REGION SCHEMES FUNDED FROM PSDF ( Amount in Rs. Crores) As on Approved Cost Grant Date of Sanction Sanctioned Funds Released % of fund Disbursed against grant Sanctioned /10/ % /03/ % /03/ % % % /03/ % % Status/Remark As per information received from PSTCL vide mail dated Progress is NIL 6 Rajasthan 2 Renovation and Upgradation of protection system of 220kV and 400kV substations in the state of Rajasthan in order to rectify Protection related deficiencies /12/ % 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 /12/ % 7 Delhi 1 Rectification and Upgradation of protection system and replacement of outlived equipments in DTL substations 8 Northern Regional Power Committee (NRPC) 9 Uttar Pradesh 1 Study program on the integration of renewable energy resources of NRPC 3 Installation of Capacitors banks in the state of Uttar Pradesh in order to improve Voltages Renovation and Upgradation of Protection and control Systems, UFR Mapping and Islanding scheme in the state of Uttar Pradesh to rectify Protection related deficiencies Reconductoring of 11 Nos of 132kV Lines of the state network of UPPTCL for Relieving Congestion /03/ % /10/ % Completed % % /03/ % Supply completed The details enclosed with TOATAL % NOTE: One scheme of Uttar Pradesh for relieving congestion (Rs. 60 crores sanctioned grant during ) is not eligible as the LoA has already been placed before the approval of the scheme.

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44 LIST OF NEW TRANSMISSION ELEMENTS CHARGED IN THE MONTH OF FEB Transmission Lines(220kV ckt km & 400kV ckt km ) Si. No. Transmission Elements Owner Type Charging Date Charging Time Details of Transmission Elements kv Dehradun- Jhajra-I PTCUL Line : km Twin Zebra kv Dehradun- Jhajra-II PTCUL Line : km Twin Zebra kv Allahabad(PG)- Meja(NTPC)-II PGCIL Line : km ACSR Twin Moose kv Amritsar-Jalandhar-S/C { LILO of 400 kv Amritsar-Hamirpur at Jalandhar} PGCIL Line : km ACSR Twin Moose kv Orai(PG)-400kV Orai(UP){LILO of 220 kv Kanpur(PG)-220kV Orai at 400 kv Orai} UPPTCL Line : km Single Zebra kv Hamirpur-Jalandhar-S/C { LILO of 400 kv Amritsar-Hamirpur at Jalandhar} PGCIL Line : km ACSR Twin Moose 7 8 CB No X14 & 400 kv Interconnector between Unit 5,6 and Unit 7,8 SSCTPP Kanpur(PG)-765kV Orai(UP) {LILO of 220 kv Kanpur(PG)-220kV Orai at 400 kv Orai} RVUNL ICT : km ACSR Quad Moose UPPTCL Line : km Single Zebra

45 LIST OF NEW TRANSMISSION ELEMENTS CHARGED IN THE MONTH OF FEB 2017 ICTs (3045 MVA) / Bus Reactor (365 MVAR) / Line Reactors Si. No. Transmission Elements Owner Type Charging Date Charging Time MVA ICT(PG) at Dehar replacing 250 MVA ICT(Augmentation of capacity) PGCIL ICT :15 (on load) MVAR B/Reactor at RAPP C NPCIL B/Reactor : MVA ICT-II at Anpara(Replacing damage ICT) UPPTCL ICT : CB No 425R of 125 MVAR L/Reactor at Gorakhpur of Barh-Gorakhpur-I CB No 427R of 125 MVAR L/Reactor at Gorakhpur of Barh-Gorakhpur-II PGCIL PGCIL :47 RRVPNL PGCIl : MVA,400/220kV ICT-II at Sohawal PGCIL ICT (on no load) MVA,400/220kV ICT at Orai UPPTCL ICT : x275,400/21 GT at Suratgarh Super Critical Thermal Power Plant RRVPNL GT : MVA,400/220kV ICT-III at G.Noida UPPTCL ICT :10(on load) MVAR B/Reactor at Fatehbad (UP) UPPTCL B/Reactor : MVA ICT-II at Fatehabad (UP) UPPTCL ICT :59 (on load)

46 LIST OF NEW TRANSMISSION ELEMENTS CHARGED IN THE MONTH OF FEB 2017 Other Elements / Lines for antitheft purpose / old line on new bays SI. No. Transmission Elements Owner Type Charging Date Charging Time (Hrs) kv Bay 203, 208 &209 at Sohawal (PG) PGCIL Bays :05,12:27 &13:45 hrs kv Bays at Dehradun of Abdullapur(407,408,409 & 410) PGCIL Bays :02/14:07/13:49/14:50

47 12 Obra TPS UP UPRVUNL Annual maintenance :01 Long Outages Generating Units : Feb Si. No Station Location Owner Unit No Capacity Reason(s) Date Outage Time 1 RAPS-A RAJASTHAN NPC Subject to regulatory clearance :58 2 Dehar HPS HP BBMB Renovation work :00 3 Bhakra-L HPS HP BBMB Annual maintenance :50 4 Badarpur TPS DELHI NTPC Manually closed due to pollution in Delhi NCR area :14 5 Bhakra-R HPS HP BBMB Annual maintenance :00 6 Dehar HPS HP BBMB Penstock repairement :10 7 Dehar HPS HP BBMB Penstock repairement :10 8 Chamera-III HPS HP NHPC 3 77 HRD inspection work :00 9 Chamera-III HPS HP NHPC 2 77 HRD inspection work :00 10 Chamera-III HPS HP NHPC 1 77 HRD inspection work :00 11 Obra TPS UP UPRVUNL R & M work :44

48 Long Outages Generating Units : Feb Si. No Station Location Owner Unit No Capacity Reason(s) Date Outage Time 13 Rajwest (IPP) LTPS RAJASTHAN RRVUNL Bad material leakage :55 14 RGTPP (Khedar) HARYANA HPGCL Annual maintenance :33 15 Bhakra-R HPS HP BBMB Ash handling problem Capital maintenance of pen stock head gate :30 16 Giral (IPP) LTPS RAJASTHAN RRVUNL Bad materials leakage :20 17 Giral (IPP) LTPS RAJASTHAN RRVUNL Boiler tube leakage :27 18 Guru Gobind Singh TPS (Ropar) PUNJAB PSEB Boiler tube leakage :00 19 Panki TPS UP UPRVUNL Boiler tube leakage :50 20 Paricha TPS UP UPRVUNL Boiler tube leakage :37 21 Rajwest (IPP) LTPS RAJASTHAN RRVUNL Boiler tube leakage DUE TO BED MATERIAL LEAKAGE :02

49 Long Outages Transmission Elements : Feb Si. No Element Name Type Voltage Level Owner Outage Date Time Reason / Remarks 1 New Wanpoh 125 MVAR Bus Reactor 1 Bus Reactor 400 kv PGCIL :09 Take out due to low voltage. 2 FSC of Pampore-2 at Kishenpur FSC 220 kv PGCIL :00 3 FSC of Pampore-1 at Kishenpur FSC 220 kv PGCIL :00 4 Bamnauli(DTL)-Jatikala(PG) 1 Line 400 kv DTL :29 Line length has reduced after LILO work completion Line length has reduced after LILO work completion Tower damage (First dead end tower from Bamnauli S/S) / Ckt-II charge through ERS tower 5 Kalisindh 315 MVA ICT ICT 400/220 kv RRVPNL :50 Buchholz relay operated. 6 Bawana 315 MVA ICT 1 ICT 400/220 kv DTL :37 Fire in ICT-1 7 Anpara 100 MVA ICT 2 ICT 400/132 kv UPPTCL :25 DGA test values are poor 8 Sarnath 50 MVAR B/R 9 Wagoora 50 MVAR B/R 10 FSC ( 50% ) of Koteshwar Pool -2 at Meerut (PG) Bus Reactor Bus Reactor 400 kv UPPTCL :14 Failure of Reactor 400 kv PGCIL :56 Take out due to low voltage. FSC 400 kv PGCIL :01 Fire in FSC-2 at Meerut. 11 FACT at BLB in Knp-BLB Line FACTS 400 kv PGCIL :20 Y-Phase current imbalance

50 Long Outages Transmission Elements : Feb Si. No Element Name Type Voltage Level Owner Outage Date Time Reason / Remarks /220 kv,315 MVA ICT- II at Jodhpur ICT 400 kv RRVPNL :11 R-ph Bushing burst. 13 Kishenpur - Meerbazar (JK) Line 220 kv J & K :23 Line tripped on R-Y-N fault. Tower no. 175 collapsed.{11km from Ramban (towards Kishenpur direction) } 14 TCSC1 of Muzaffarpur-1 at Gorakhpur TCSC 400 kv PGCIL :23 Signal problem 15 FSC of 400 kv Aligarh - Muradnagar at Muradnagar end FSC 400 kv UPPTCL :28 LILO of 400 kv Panki Muradnagar at Aligarh. 16 FSC of 400 kv Balia- Sohawal I at Sohawal FSC 400 kv UPPTCL :52 Low current. 17 FSC of 400 kv Fatehpur-Mainpuri I at Mainpuri end ICT 400/220 kv DTL :49 Due to self-triggering of sparkgap 18 FSC of 400 kv Kanpur-Ballabgarh- I FSC 400 kv PGCIL :55 Due to Signal column fail

51 IMD: Press release on 28 th Feb 2017 Weather Monitoring Action: States should assess the load behavior with rise in temperature.