भ त क Government of India ववद य त म त र लय Ministry of Power उत त क ष त र य ववद य त वमवत Northern Regional Power Committee. -sd-

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1 भ त क Government of India ववद य त म त र लय Ministry of Power उत त क ष त र य ववद य त वमवत Northern Regional Power Committee.-उक ष वव /प रच लन/106/01/2017/ ददन क: ववषय: प रच लन मन वय उप वमवत क 142 व ब ठक क क यग च Subject: Agenda of 142 nd OCC meeting. प रच लन मन वय उप- वमवत क 142व ब ठक क 10:30 बज उ.क ष.वव.. वचव लय, नई ददल ल म आय वजत क ज एर उक त ब ठक क क यग च उत त क ष त र य ववद य त वमवत क व ब इट प उपलब ध ह 142 nd meeting of the Operation Co-ordination sub-committee will be held on , 10:30am at NRPC Secretariat, New Delhi. The agenda of this meeting has been up-loaded on the NRPC s web-site It is requested that the updated status of various points under follow up issues from previous OCC M may please be furnished. -sd- (उप न द र क म र) अध क षण अभ य त ( प रच लन) व म : प रच लन मन वय उप वमवत क दस य To: As per list 18-ए, शह द ज त स ह म र ग, कटव र य य, नई ददल ल फ न: फ क : ई-म ल: seo-nrpc@nic.in व ब ईट: 18-A, Shaheed Jeet Singh Marg, Katwaria Sarai, New Delhi Phone: Fax: e- mail: seo-nrpc@nic.in Website:

2 Agenda for the 142 nd Meeting of the Operation Coordination Sub-Committee (OCC) of NRPC Date & time: at hrs. Venue: NRPC Secretariat, New Delhi 1. Confirmation of Minutes: The minutes of the 141st OCC meeting held on and at New Delhi were issued vide letter of even number dated The sub-committee may discuss and confirm the Minutes. 2. Review of Grid operations of last month (November 2017): 2.1 Anticipated vis-à-vis Actual Power Supply Position (Provisional) for November, Anticipated (LGBR) Power Supply Position v/s Actual (Provisional) Power Supply Position of Northern Region during the month of November, 2017 is as given below: State Delhi Haryana H.P. Punjab Rajasthan U.P. Uttarakha nd Anticipated Actual %age Anticipated Actual %age Req/ (LGBR) (Provisional) Variat (LGBR) (Provisional) Variat Avl (MU/day) ion (MW) ion Req Avl Req Avl Req Avl Req Avl Req Avl Req Avl Req Avl As per above, it has been observed that there are much variations (i.e. > 5.0%) in the Anticipated vis-àvis Actual Power Supply Position (Provisional) for the month of November, 2017 in terms of Energy requirement for Haryana, HP & Uttarakhand and in terms of Peak demand for Delhi, Haryana, Rajasthan & UP. These states are requested to submit reasons for such variations in writing so that the same can be deliberated in the meeting. All SLDCs are requested to furnish the provisional and final power supply position in prescribed formats by 2 nd and 15 th day of the month respectively in compliance to the provision 5.3 of IEGC. 2.2 Power Supply Position for NCR: 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, 2017 is placed on NRPC website. ( 2

3 Concerned utilities are requested to furnish the data on regular and time bound manner The NRLDC to make a detailed presentation on grid operation of last month. 3 Maintenance Programme of Generating Units and Transmission Lines: 3.1. Maintenance Programme for Generating Units. The proposed maintenance programme for Generating Units for the month of 1/2018 will be discussed on 14.12,2017 at NRPC office, New Delhi Outage Programme for Transmission Elements. The proposed Outage programme of NLDC & NRLDC oversight transmission elements for the month of 1/2018 will be discussed on at NRPC office, New Delhi. 4 Planning of Grid Operation: 4.1 Anticipated Power Supply Position in Northern Region during January, 2018 (As per 14 th LGBR Sub-committee meeting) is as under: State Anticipate d Peak Demand Expected Peak Availabil ity Surplus (+)/ Deficit (-) Anticipated Energy Requiremen t Expected Energy Availabilit y Surplus (+)/ Deficit (-) (MW) (MW) (MW) % (MU/day) (MU/day) (MU/day ) % Chandigarh Delhi 4250* Haryana H.P J&K Punjab Rajasthan U.P Uttarakhand Region * As per LGBR=4400 MW SLDCs are requested to inform their updated estimate of power supply position for January, 2018 and measures proposed to be taken to bridge the gap in availability as well to dispose of the surplus, if any, in the prescribed format. 5 Information about variable charges of all the generating units in the Region. The variable charges for different generating units are available on the Merit Order Portal. All utilities are requested to intimate if the process of Scheduling is being done as per Merit Order Despatch and in case of variations the reasons may be highlighted. 6. Study by POWERGRID for reactive compensation at 220 kv level: POWERGRID, in September, 2016 had submitted its report on Reactive compensation in Northern Region. Based on the reservations of Delhi and Rajasthan to the recommendations made by POWERGRID in the report, NRPC in its 39 th meeting had advised for referring the 3

4 report by POWERGRID and study by Rajasthan to standing committee on Power System Planning of NR. In the 39 th Meeting of SCPSPNR held on 29 th &30 th May 2017 following was agreed: a) TCR of capacity 500 MVAr at Kurukshetra 400 kv bus. b) Bus Reactors at 30 no. 220 kv sub-stations and 18 no 400 kv level sub-stations subject to the availability of space. It was also agreed that these reactors shall be provided by the owner of the substations. Reactors approved in the 39 th Standing Committee held on 29 th & 30 th May 2017 Sl.No. Bus Name State Reactors Proposed(MVAr) 220kV 1 Jind(PG) Haryana 25 2 Fatehabad(PG) Haryana 25 3 Kishenpur(PG) J&K 25 4 Jalandhar(PG) Punjab 2X25 5 Nakodar Punjab 25 6 Amritsar(PG) Punjab 25 7 Dhuri Punjab 25 8 Akal Rajasthan 25 9 Suratgarh Rajasthan 2X25 10 Bikaner Rajasthan 2X25 11 Barmer Rajasthan Narela Delhi R.K.Puram-I Delhi Patparganj 2 Delhi 2X25 15 Maharanibagh(PG) Delhi 2X25 16 Bamnoli Delhi SabjiMandi Delhi 2X25 18 Gopalpur Delhi 2X25 19 Indraprastha Delhi 2X25 20 Geeta Colony Delhi 2X25 21 Harsh Vihar Delhi 2X25 22 Wazirabad Delhi 2X25 23 Electric Lane Delhi 2X25 24 Mandola Delhi AIIMS Delhi 2X25 26 SaritaVihar Delhi Bawana Delhi PreetVihar Delhi Mundka Delhi Masjid Moth Delhi kV 1 Maharanibagh(PG) Delhi Mundka Delhi Mandola(PG) Delhi Hissar(PG) Haryana Kala Amb(TBCB) Himanchal Chamera Pooling Stn.(PG) Himanchal 125 4

5 7 Kishenpur(PG) J&K Nakodar Punjab Jullandhar(PG) Punjab Moga(PG) Punjab Dhuri Punjab Patiala(PG) Punjab Jodhpur Rajasthan Sikar(PG) Rajasthan Allahabad(PG) U.P Meerut(PG) U.P Kashipur Uttarakhand Srinagar Uttarakhand 80 The discussions held in the last two OCC meetings are as under: 140 th OCC meeting: The representative of RVPNL informed that as intimated in the 139th OCC meeting, the scheme would not be split into two (of static and dynamic reactors) and reply would be sent to PSDF approval committee clarifying their reservations. 37 th TCC/40 th NRPC meeting:- POWERGRID was requested to commission TCR of capacity 500 MVAr at Kurukshetra 400 kv bus at the earliest citing the stabilization of Champa- Kurukshetra HVDC link. 141 st OCC meeting:-powergrid informed that the reactor would be commissioned within 30 months. 40 th NRPC had also advised all the utilities to commission the reactors at the earliest and to submit the detailed action plan with the timeline. NRPC had further pointed that these reactors are essential for maintaining the voltage level of the grid and needs to be commissioned within 26 months. Concerned utilities are requested to furnish the action plan with timeline and the status of action taken for the installation of reactors. 7. System Study for Capacitor Requirement in NR for the year & In the 37 th NRPC meeting the proposal for entrusting the work of System Studies for the year and to CPRI was approved and accordingly a Letter of Award (LoA) was issued to CPRI for carrying out the studies with consultancy charges of Rs. 20 Lakh plus Service tax after the approval of Chairperson, NRPC. Due to delay in data submission by the utilities for the period of FY it was decided to conduct the studies for and CPRI has submitted the report for capacitor requirement for and according to the outcomes of the study conducted by CPRI 39th NRPC approved the proposal of installation of capacitor by Haryana, Punjab and Uttar Pradesh as proposed by the respective States for funding through PSDF. NRPC also approved that installation of capacitor in J&K limited to 1102 MVAR (as per study of CPRI). 5

6 139 th OCC meeting: Representative of UP had some reservations regarding the quantum of capacitor bank under operation and that being reflected in the report submitted by CPRI. It was informed that, the figure mentioned in the report was MVAR, however, it was somewhere in the range of 5000 MVAR operational in their system. Representative of CPRI in the meeting assured rechecking the data incorporated in their study. He further informed that, during the study, help of power maps available on UPSLDC s website was also taken as it was not possible to trace the details of upstream substation for the capacitor submitted at 11kV and 33 kv level. In the meeting the issue of identifying the 11kV and 33kV feeders corresponding to the recommendation of CPRI for capacitor installation (recommendation made at 220kV and 132kV substation by lumping the downstream network) was also discussed. It was opined that, for a radial system the requirement as recommended can be more or less equally distributed among the downstream feeders. However, for a connected system it would not be possible. For the study of capacitor requirement for , it was proposed to conduct the study at 11kV/33kV level in order to obtain more feasible and practical requirement of capacitors in case the system at 220/132/66kV was not radial. However, if the system is radial, then the requirement of capacitors assessed by the CPRI may be proportionately translated upto 11kV level. States informed that most of the system is radial. Therefore capacitors study could be done as per original proposal of CPRI for also. 140th OCC meeting: In the meeting representative of UP (SLDC) again raised the issue of the quantum of capacitor banks incorporated in the study by CPRI. EE (O), NRPC intimated that the comments of UP has already been sent to CPRI and further suggested that the utilities could also take up the issue directly with the concerned personnel in CPRI (Dr. Manohar Singh, Mob No , E- mail:manoharsingh@cpri.in ). Regarding the study of capacitor requirement for , they plan to conduct their own study for assessing the capacitor requirement considers actual data of power factor and MVAR injection of load at the 33 kv level and other factors such as generator directly connected at 33 kv voltage level etc. In addition to above mentioned installed capacitor banks MVAR (81Nos. X 5.43MVAR) more Capacitor banks are already under installation. All the Utilities are requested to submit the action plan for the installation of the capacitor banks as per the outcome of the study conducted by CPRI for th TCC/40 th NRPC meeting: The issue of study for was discussed in the 37 th TCC/40 th NRPC meeting. In the meeting it was proposed to conduct the study in two stages: i. One at 220/132 kv level ii. Subsequently down to 66/33/11 kv level As it would involve a huge task of collection of data it was also agreed to conduct the study of capacitor requirement for in place of

7 NRPC approved the proposal for conducting the study of capacitor requirement for at 11kV/33kV/66kV level and also for the additional charges which may be levied by CPRI for conducting the study to be paid from NRPC fund. 141st OCC meeting: Members were briefed about the decision of NRPC for conducting the study for at 11/33/66 kv level. All the utilities were requested to timely submit the data for their network for successfully conducting the study. NRPC Secretariat is in the process of getting the proposal from CPRI for the additional scope of work as approved by the 40 th NRPC. 8. Phase nomenclature mismatch issue with BBMB and interconnected stations During the discussions held in 34 th PSC meeting, it was reported that phase sequence of BBMB at the interconnection with other utilities, do not match. It was observed that it leads to confusing situation while charging of interconnected lines and also in other coordination problem while reporting an issue. While deliberating it was observed that, the main issue was primarily of the nomenclature of phases at BBMB end. In view of the above, BBMB was asked to rectify the nomenclature phase sequence at their end to avoid any kind of system operation problem arising due to the same. 140 th OCC meeting: The representative of BBMB informed that a committee has been constituted by TS organization of BBMB. BBMB submitted the report (Annexure-agenda 8) of the committee providing the details of the prevailing conditions at respective ends of BBMB and other utilities connected to them. The present situation as stated in the report is as given below: Phase of the grid R Phase Y Phase B Phase Corresponding nomenclature of the phase at BBMB end B Phase R Phase Y Phase However, the report of the committee does not mention the action taken or proposed to be taken by BBMB in order to rectify the issue of phase nomenclature mismatch. BBMB may update. 9. Operation of hydro power projects in peaking mode POSOCO has carried out operational analysis of various hydro stations in the country and observed that despite 40.6 GW of peaking hydro capacity, only about 33 GW peak generations is carried out on all India basis. According to POSOCO, this is on account of a number of hydro stations, particularly in state sector, which are not being operated in peaking mode. In order to examine the above observation, a sub-committee has been constituted by the MoP under Chairperson, CEA with heads of POSOCO, NHPC, SJVN & THDC as member and Director (H), 7

8 MoP as the member convener. The sub-committee has held three meetings with the concerned hydro generating stations and concluded that there is scope for about 2000 MW additional power generation from hydro stations during peak hours. Based on the deliberations at the meetings of the Committee, Chairperson, CEA has advised to discuss the above operational analysis & the matter of utilization of hydro stations in peaking mode be discussed at the monthly OCC meetings while discussing operational planning for the month ahead and analyzing the operation in the previous month. In the meeting all members were advised to go through the report on the and then submit the comments on the issue in the next OCC meeting. None of the utilities have submitted comments so for. All Utilities are again requested to expedite the same. 10. Targets fixed for Load Relief from operation of df/dt & UFR relays in Haryana-review thereof (Agenda by Haryana) Haryana has different loading pattern for different crop harvesting systems. Target load relief for the state of Haryana has been fixed as 2843MW (UFR: 1243MW,df/dt: 900MW,SPS: 700MW) at NRPC level. This target had been fixed by considering the maximum demand of 6725MW in However, the maximum load of state comes out during summer season and the target as stipulated above could only be achieved during peak summer season. During off peak season, the target load relief could not be provided as the average off peak load of Haryana state remain between MW and minimum load of state was even recoded as low as 1600 MW during the last winter season which was approximately half of the targets fixed. In case of Haryana, target load relief of 2843MW has been fixed under different defense mechanism by considering peak load demand of 6725 MW of and making it applicable throughout the year. However, the same quantum was taken even for the off-peak Period when the state experiences average load of MW for 6-months (i.e Jan-April & Nov-Dec) & min. load of around MW. Clause 5.4.2(e) of IEGC mandates the arrangement of Interruptible load in 4 groups (excluding Un-interruptible load) in the following way: 1) Interruptible Load:- (i) For Scheduled power cuts (ii) For un-scheduled cuts (iii) Essential load of Hospitals, Airport, Railways etc. is additional. 2) Uninterruptible Load:- (i) Sanctioned Load of continuous process industries. (ii) Essential load of Hospitals, Airport, Railways etc. is additional. It also mandates that there should be on overlapping between different groups of load. 8

9 Accordingly, by excluding un-interruptible load(average running load of Continuous process Industrial load & substantial amount of airports, Railways & Hospitals load), targeted load relief of 2843MW cannot be achieved during off-peak period of 6 months (i.e Jan-April & Nov- Dec ) in Haryana Control Area even by putting all the balance state under defense mechanism. It is therefore requested to review the target fixed for UFR & df/dt for Haryana State keeping in view the off peak load of the State during winter season. 141 st OCC meeting: It was intimated that the data required for reviewing the target load relief had been received from all utilities except PTCUL. PTCUL representative stated that the requisite data would be submitted at the earliest. SE (O), NRPC stated that the review of the load relief for all the states was very essential keeping in view the request of HVPNL& PSTCL. PTCUL may submit the data in order to allow reviewing the target load relief for the states. 11. Follow up of issues from previous OCC Ms Status update At Annexure 11 is enclosed the details of the Agenda points on which status update is required, the same may be submitted. 12. RIHAND STAGE III ISSUES (AGENDA BY NTPC) Rihand stage-iii (2x500MW) units have now been switched over to western region by connecting them at Vindhyachal Pooling Station on 28th Nov' After disconnection of Rihand Stage-III from northern grid, guidance on following points is needed: 1. In case of western grid failure, what will be the start up procedure for Stage-III Units? 2. In case of northern grid failure, can start up power be taken from Stage-III after closing Bus Coupler 3 & 4 (Connecting Stage-II to Stage-III)? 3. When one line to Pooling Station is under Shut down, what should be the status of auto recloser of other line? OCC Members may discuss. AGENDA BY NRLDC 13. High voltages in the Grid: High voltages is continuously prevailing throughout the Northern grid for major part of day and it further escalates during night hours due to light load condition making the Grid operation in alert situation daily. High voltages during the winter are known phenomenon and various plan & actions have already been deliberated in regular OCC/TCC and winter preparedness meetings to regulate such high voltage. Despite all the continuous efforts, still very high voltages are being experienced during day/night hours. Regular monitoring and feedback of action plan is necessary to further tune the offline preparation for combating the high voltages during winter. 9

10 Monitoring / progress of action plans already discussed and approved in OCC are as: a. Reactor utilization: Static voltage regulation i. Updated list of Bus reactor, its availability and data at control centers. ii. Update List of lines whose line reactor can be switched as bus reactor on opening of such lines. A list of lines wherein there is a provision of such switching though confirmation from the respective utility is pending is attached at Annexure-I(a). Respective constituents are requested to confirm the same as soon as possible to utilize it for voltage regulation. Further as discussed in 141 st OCC meeting, Constituents may impress upon taking in service Line reactors which can be used as bus reactor during outage of line as per Voltage conditions. Monitoring of data of one or two night shift indicates that lines where LR can be used as Bus reactor on opening of that line are not actually being taken LR as BR into service. Graphs of such lines for that date is enclosed in Annex-I (b) Actions: Progress of control switching logic change/confirmation from respective utility wherever required or provisions to use line reactor as Bus reactor on opening of lines so that such reactor can be used for voltage regulation as per grid conditions. Directive to each site personnel to use LR as BR when line is out of service as per voltage conditions. b. Absorption of MVAr by Generator: Dynamic voltage regulation i. MVAr absorption by generator has been suggested and the SCADA graph of MVAr vs. Voltage is being monitored and shown in OCC to track the actual response contribute by the Generator in the need of hours. It has been observed that for some of the generators, either the absorption of MVAr was not adequate as per the capability curve or the telemetry of MVAr data was not accurate. Response of some of the thermal/gas machine for the month of Nov 17/Dec 17 is enclosed in Annexure-II. It is pertinent to mention here that SCADA data measure from HV side of GT thus, actual MVAr absorption by the generator would be lesser than as observed from the plots. Plots provided by NTPC and Punjab are also attached in Annexure-II. Generating station Rihand Singrauli Dadri-Th Jhajjar Faridabad Gas Unchahar Reactive absorption Absorbing upto 600 MVAr (Data need check) Absorbing upto max 200 MVAr, Margin available Generating and absorbing in range of 300 to -200 MVAr (Data not reliable), plots provided by NTPC also attached Absorbing -50 to 400 MVAr Absorbing 50 to 200 MVAr (data needs to be check) Absorbing and generating -100 to 100 MVAr 10

11 Anta Absorbing 100 MVAr (Data does not seem reliable) Auraiya 500 to 600 MVAr absorption, Data not reliable Dadri gas Absorption upto 100 MVAr Anpara-C Generating & absorbing MVAr (from -50 to 150 MVAr) Bara TPS Absorbing 50 to 150 MVAr (Data need check) Lalitpur TPS Generating MVAr most of the time Rajpura TPS Absorbing 200 to 450 MVAr Talwandi Saboo -100 to 100 MVAr, as per data lot of margin is available, although data needs to be checked, Capability curve plots also shown CLP Jhajjar Absorbing 50 to 250 MVAr Kawai TPs Generating & absorbing MVAR (from -150 to 100 MVAr) NTPC and Punjab have started to plot generator MVAr v/s voltage plots using their SCADA data and share the same. Other generation utilities are also requested to plot & share their MVAr v/s voltage plots for generators to check the actual absorption and validation of SCADA data also. ii. Synchronous condenser operation: Synchronous condenser operation of hydro units has been discussed in previous OCC meetings and following are the machines that has been trial tested and can operate in synchronous condenser mode: a. Tehri Unit#1 &2: Trial testing of unit#2 was carried out in last year and this year also, unit#1 & 2 has been trial tested for synchronous condenser operation on As per discussion with THDC, only one unit can run in synchronous condenser mode at a time. It has been informed that two hour limitation would not be there this time but another limitation i.e. of closing the synchronous condenser at least two hour before station is to be brought in generation mode. b. Chamera-2: Last year, Chamera-2 unit has been trial tested and confirmed the synchronous condenser mode of operation. This year NHPC is yet to confirm the same c. Larji (HP): HP has also confirmed the testing of Larji unit for synchronous condenser mode last year. However, that time trial testing showed only MVAr generation in synchronous mode. HP may share the latest progress regarding the synchronous condenser mode ability of Larji machines. d. Pong (BBMB): Pong units have also been used for synchronous condenser mode of operation for dynamic voltage regulation. Pong graph of last 20days (Nov/Dec 17) is enclosed in Annex-II (a). e. RSD (Punjab): Punjab is yet to confirm the testing of RSD unit in synchronous mode of operation f. Confirmation from Uttarakhand regarding capability of new gas station is still awaited. Actions: All are requested to kindly update the present ability/status of operation of these machines in synchronous condenser mode. c. Reactive Power injection at ISTS nodes: i. As per NRPC REA account, following are the nodes that are injecting MVAr into the Grid and need quick attention to check all the possible desired actions. 11

12 State As per NRPC Reactive energy account ( To : Injection of MVAr at ISTS during High voltage Punjab Barnala, Ganguwal, Gobindgarh, Jamsher, Mahilpur, Mohali, Moga (PG), Patiala Haryana Bahadurgarh, Deepalpur, Fatehabad, Gurgaon, Hisar Rajasthan Hisar, Khetri, Bhinmal, Heerapura, Jaipur South, Kankroli, Kota, Sikar Uttar Anpara, Cbganj, Chinhat, Kanpur, Mainpuri, Pradesh Moradabad, Panki, Rosa, Simbholi Delhi Narela, Bamnoli, Bawana, MaharaniBagh, Mundka ii. MW and MVAr of 400/220kV ICT nodes where MVAr is being injected from 220kV to 400kV system are as: State 400/220kV nodes where 220kV nodes is injecting MVAr to 400kV nodes Punjab Dhuri, Nakodar, Moga, Patiala, Ludhiana, Jallandhar Haryana Dhanoda, Bahadurgarh, Fatehabad, Hisar Rajasthan Bhinmal, Kankroli, Kota, Suratgarh, Heerapura, Sikar, Jaipur South, Jodhpur Uttar Auraiya, Kanpur Pradesh Delhi Bamnoli, Bawana, Mundka Plots showing MVAr flow from 220kV side to 400kV side for above nodes are attached as Annexure III. d. Tap optimization At 400kV & above, tap optimization based on simulation studies, Scatter plots of SCADA data of HV/LV nodes has been suggested and incorporated on regular basis by RLDC/NLDC. The suggested list for tap changing for this winter has been shared in 140 th /141 st OCC meeting. It was suggested that SLDC should also optimize their tap at 220kV and below based on scatter plots and off-line studies. States are requested to please share their studies in this regard & update progress of above. Actions: SLDCs may present their studies in respect to tap optimizations in their control area e. Opening of lines: Opening of EHV lines is taken as last resort to regulate the high voltage especially during night hours. Factors based on which such lines can be listed or sorted out considering the reliability as major criteria are as follows: i. Long parallel lines whose Line Reactor can be switched as BR ii. Line that give High MVAr/Voltage relief iii. Parallels line emanating from Hydro station (Hydro station usually closed during night hours) 12

13 iv. Long parallel lines whose loading is under 20-25%during night hours 14. Over-voltage nodes Voltage duration curve of Sep-Nov 17 is enclosed in Annex-IV, some of the nodes which are experiencing persistent high voltages in Nov 17 even after utilizing all the available resources to curb high voltages are listed below. S.No State Nodes (50 % of time above 420kV) in Nov Punjab Amritsar, Jallandhar, Dhuri (70%),Rajpura (80%),Makhu (70%), Talwandi Saboo (80%),Nakodar 2 Haryana Bhiwani, Nuhiyawali, Dehar, Kabulpur, Abdullapur, Mahindergarh (60%), Panchkula 3 Rajasthan Bhiwadi, Suratgarh (60%),Jodhpur 4 Delhi Harsh Vihar, Mandola, MaharaniBagh 5 Uttar Pradesh Agra (90%),Fatehpur (70%), Mainpuri, Paricha (60%), Muzaffarnagar, Lucknow(UP) 6 Himachal Nallagarh Pradesh 7 Hydro/Ther mal (ISGS) Banala, Karcham Wangtoo, Jhakri, Rampur Delhi SLDC reported various 220kV lines tripping due to high voltage and over fluxing in their control area dated 26 th Nov As reported following element tripped: 220kV HarshVihar-PreetVihar#1, 220kV PreetVihar-Patparganj#1, 220KV Patparganj-Gazipur, 220KV MaharaniBagh-Sarita Vihar, 220KV Pragati-Park Street#2 Pragati Generation (~ 275MW) tripped on overvoltage. Various 220KV Transformers at 220KV Gazipur, Sarita Vihar, Parkstreet tripped on over flux. It is understand that overvoltage setting generally at 220kV level is not being used. Delhi SLDC may share the detail report on tripping comprising the practices used for overvoltage /Overflux protection settings at these nodes or in Delhi control area. Based on above tripping due to high voltage, Delhi SLDC requested to change the tap position at Harsh vihar to reduce the voltage at 220kV Harsh Vihar on 26 th Nov As per observation and study carried out by NRLDC, Voltage at both side i.e. 400kV and 220kV is on higher side. As there is no control provision at 220kV Harsh Vihar, Delhi SLDC was permitted to change the tap from 9 to 7 on 5 th Dec However, NRLDC suggested that voltage regulation for such nodes should be plan for long term i.e. installation of Bus reactor or other dynamic voltage support. On changing the tap, 400 kv voltages at Harsh Vihar further increased and 220kV voltage marginally decreased as expected. 13

14 It is also necessary to share that 220kV Harsh Vihar was injecting the MVAr at 400kV and tap changing further increases the reactive power injection at 400kV on HV causing Delhi control area more payable for reactive charges. High MVAr injection kV and above transmission lines without polymer insulator and its cleaning progress: EHV lines tripping in winter during fog has been experienced since many years and it has been suggested to regularly clean lines before winter and to replace the porcelain insulator to polymer insulators. Progress on remaining lines whose insulators are yet to be cleaned/changed may please be shared by transmission licenses/stus. For monitoring of polymer insulator repalcement and cleaning of conventional insulator one meeting has been held on 14 th Nov Status of polymer insulator replacement discussed during the meeting and asked for submission of the details. After the meeting, details were received from POWERGRID and Adani. List of the transmission line without polymer insulator is attached as Annexure-V. CTU awarded the contract of Pollution Mapping for NR to CPRI. CPRI identified the pollution stretch in its report and report was submitted and discussed in NRPC meeting. It was also decided that new lines coming in pollution stretch and in fog prone areas shall be designed with polymer insulators. Among the lines attached in Annexure-5, some of the lines are very critical for reliability point of view and may be discussed for insulator repalcement. OCC may discuss and decide 14

15 the Polymer Insulator replacement on these lines. List of the lines are tabulated below for discussion: S. No. Name of Line 1. HVDC lines A. Adani Power Ltd (Adani Transmission India Ltd.) Adani Mundra - Mahendergarh 1 Pole-I Adani Mundra - Mahendergarh 2 Circuit ID O&M by Replaced with Polymer Insulator (As a % of Total Line Length) 1 ATIL Partial (7%) 2 ATIL Partial (7%) Pole-II kV Transmission Line A. POWERGRID 1 Phagi-Bhiwani(PG) 1 POWERGRID Partial (18%) 2 Phagi-Bhiwani(PG) 2 POWERGRID Partial (16%) B. UPPTCL 1 AnparaC-Unnao 1 UPPTCL Conventional 2 AnparaC-AnparaD 1 UPPTCL Not available 3 Agra(Fatehbad)-Lalitpur 1 UPPTCL Not available 4 Agra(Fatehbad)-Lalitpur 2 UPPTCL Not available 5 Bara-Mainpuri 1 UPPTCL Not available C. RRVPNL 1 Anta-Phagi 1 RRVPNL Not available 2 Anta-Phagi 2 RRVPNL Not available kV HVAC Transmission Line A. POWERGRID 1 Amritsar-Malerkotla 1 POWERGRID Not available 2 Amritsar-Malerkotla 2 POWERGRID Not available 3 Kanpur-Agra 1 POWERGRID Conventional 4 Kanpur-Auraiya 1 POWERGRID Conventional 5 Kanpur-Auraiya 2 POWERGRID Conventional 6 Kurukshetra-Malerkotla 1 POWERGRID Not available 7 Kurukshetra-Malerkotla 2 POWERGRID Not available 8 Roorkee-Dehradun 1 POWERGRID Partial (50%) 9 Sarnath-Varanasi 1 POWERGRID Partial (52%) 10 Sarnath-Varanasi 2 POWERGRID Partial (52%) B. Adani Power Ltd (Adani Transmission India Ltd.) 1 Mahendergarh (APL)-Bhiwani PG 1 APL/ATIL Conventional 2 Mahendergarh (APL)-Bhiwani PG 2 APL/ATIL Conventional 3 MahendergarhHVDC-Dhanoda 1 APL/ATIL Conventional 4 MahendergarhHVDC-Dhanoda 2 APL/ATIL Conventional C. APCPL (Aravali Power Corporation Pvt Ltd.) 1 Jhajjar (IGSTPS)-Mundka 1 APCPL Conventional 2 Jhajjar (IGSTPS)-Mundka 2 APCPL Conventional D. BBMB 1 Panchkula-Panipat 1 BBMB Antifog Remarks 15

16 E. HVPNL 1 CLP Jhajjar -Dhanonda 1 KT Jhajjar Conventional 2 CLP Jhajjar -Dhanonda 2 KT Jhajjar Conventional 3 CLP Jhajjar- Kabulpur 1 KT Jhajjar Conventional 4 CLP Jhajjar- Kabulpur 2 KT Jhajjar Conventional 5 Dhanonda-Daultabad 1 HVPNL Conventional 6 Dhanonda-Daultabad 2 HVPNL Conventional 7 Gurgaon-Daultabad 1 HVPNL Conventional 8 Gurgaon-Daultabad 2 HVPNL Conventional 9 Jhajjar-Daulatabad 1 HVPNL Conventional 10 Jhajjar-Daulatabad 2 HVPNL Conventional 11 Khedar-Fathehabad 1 HVPNL Conventional 12 Khedar-Kirori 1 HVPNL Conventional 13 Khedar-Kirori 2 HVPNL Conventional 14 Nuhiawali-Fathehabad 1 HVPNL Antifog F. PSTCL 1 Makhu-Amritsar 1 PSTCL Partial (10%) 2 Makhu-Amritsar 2 PSTCL Partial (10%) 3 Muktsar-Makhu 1 PSTCL Conventional 4 Muktsar-Makhu 2 PSTCL Conventional 5 Nakodar-Makhu 1 PSTCL Conventional 6 Nakodar-Makhu 2 PSTCL Conventional 7 Nakodar-Moga 1 PSTCL Not Available 8 Rajpura-Dhuri 1 PSTCL Conventional 9 Rajpura TPS- Rajpura 1 PSTCL Conventional 10 Rajpura-Dhuri 2 PSTCL Conventional 11 Rajpura TPS- Rajpura 2 PSTCL Not Available 12 Rajpura TPS-Nakodar 1 PSTCL Conventional 13 Rajpura TPS-Nakodar 2 PSTCL Conventional 14 Talwandi Saboo- Dhuri 1 PSTCL Partial (22%) 15 Talwandi Saboo- Dhuri 2 PSTCL Partial (22%) 16 Talwandi Saboo- Moga 1 PSTCL Not Available 17 Talwandi Saboo- Nakodar 1 PSTCL Conventional 18 Talwandi Saboo- Muktsar 1 PSTCL Conventional 19 Talwandi Saboo- Muktsar 2 PSTCL Conventional G. RRVPNL 1 Anta-Kalisindh 1 RRVPNL Not Available 2 Anta-Kalisindh 2 RRVPNL Not Available 3 Anta-Kawai 1 RRVPNL Not Available 4 Anta-Kawai 2 RRVPNL Not Available 5 Bhilwara-Chhabra 1 RRVPNL Conventional 6 Hindaun-Chhabra 1 RRVPNL Conventional H. UPPTCL 1 Agra (UP)-Agra(Fatehabad) 1 UPPTCL Not Available 2 Agra(Fatehbad)-Mathura 1 UPPTCL Not Available 3 Agra UP-Unnao 1 UPPTCL Partial (25%) 4 AnparaB-AnparaC 1 UPPTCL Conventional 5 AnparaB-AnparaC 2 UPPTCL Conventional 6 AnparaB-AnparaD 1 UPPTCL Not Available 7 AnparaB-AnparaD 2 UPPTCL Not Available 8 AnparaB-Mau 1 UPPTCL Partial (13%) 9 AnparaB-Obra 1 UPPTCL Partial 16

17 10 AnparaB-Sarnath 1 UPPTCL Partial 11 AnparaB-Sarnath 2 UPPTCL Conventional 12 Azamgarh-Mau 1 UPPTCL Partial (79%) 13 Bareilly UP-Unnao 1 UPPTCL Partial (15%) 14 Bareilly UP-Unnao 2 UPPTCL Partial (15%) 15 Gorakhpur UP-Azamgarh 1 UPPTCL Partial (76%) 16 Gr.Noida-Sikandrabad 1 UPPTCL Not Available 17 Gr.Noida-Sikandrabad 2 UPPTCL Not Available 18 Obra-Sultanpur 1 UPPTCL Conventional 19 Panki-Aligarh 1 UPPTCL Partial (24%) 20 Aligarh-Muradnagar 1 UPPTCL Not Available 21 Aligarh-Mainpuri 1 UPPTCL Not Available 22 Aligarh-Sikandrabad 1 UPPTCL Not Available 23 Aligarh-Sikandrabad 2 UPPTCL Not Available 24 Banda-Rewa road 1 UPPTCL Not Available 25 Obra-Rewa road 1 UPPTCL Not Available 26 Bara-Rewa road 1 UPPTCL Not Available 27 Bara-Rewa road 2 UPPTCL Not Available 28 Rewa road -Panki 1 UPPTCL Not Available 29 Orai-Mainpuri 1 UPPTCL Not Available 30 Orai-Paricha 1 UPPTCL Not Available 31 Paricha-Mainpuri 1 UPPTCL Conventional 32 Sarnath-Azamgarh 1 UPPTCL Conventional 33 Sultanpur-Lucknow PG 1 UPPTCL Conventional 34 Unnao-Lucknow UP 1 UPPTCL Partial (13%) 35 Unnao-Panki 1 UPPTCL Partial (41%) All the utilities may kindly share the status of insulator cleaning on the the aforesaid lines and kindly do the cleaning on priority basis. Members may like to discuss. 16. Upcoming status of reactors in coming month As per last data available, following reactors were expected to be commissioned in present/upcoming months. Status of 125 MVAR B/R at Dadri NCR As Approved in 15th NRPC meeting on 24th December, 2009, status of Bus reactor at following o Nathpa-Jhakri (1x80 MVAr) expected by 31 st Dec 2017 o Chamera-I (1x125 MVAr)expected by April 17 17

18 o Parbati-II (1x125 MVAr) and Parbati-III (1x80 MVAr), as per MoM of 34 th TCC meeting, No space at Parbati-III and Reactors at Parbati-II will be commissioned along with the commissioning of the project in Actions: Update on the progress of any upcoming reactors may please be shared. 17. New element in Uttar-Pradesh control area Following are the new element of Uttar Pradesh control area recently commissioned & synchronized with the Grid, its connectivity and downstream network: S. No. New Element synchronized in UP control area 1 400/220 kv Dasna ICT-1&2, 400 kv Dasna-Hapur /220 kv Ataur ICT-1&2, connected to Hapur, Muzaffarnagar, Muradnagar, Indirapuram 3 400/220 kv Aligarh ICT-1&2, connected to Panki, Muradnagar, Mainpuri & Sikandrabad 4 400/220 kv Sikandrabad ICT-1&2, connected to Greater Noida & Aligarh 5 400/220 kv Indirapuram ICT-1&2, & 400kV Indirapuram- Ataur 6 400/220 kv Mathura ICT-1&2, Mathura- Muradnagar & Mathura- Agra Fatehabad 7 400/220 kv Banda, ICT- 1&2,400kV Banda- Rewa Road 8 400/220 kv Gonda ICT-1&2 charged 9 765/400 kv Mainpuri ICT-1, 765 kv Mainpuri-Bara-1, 765 Mainpuri-Greater Noida /400/220 kv Hapur, ICT-1&2, 765 kv Hapur-Greater Noida, 400/220 kv ICT-1& /400/220 kv Greater Noida S/S, 765/400 kv ICT-1, 400/220 kv Other Planned Connectivity to be commissioned 400 kv Dasna- Hapur kv Ataur- Moradabad, 400 kv Ataur-Muradnagar 400 kv Aligarh- Shamli, LILO of Aligarh-Sikandrabad at Harduaganj LILO of 400 kv Aligarh-Sikandrabad at Harduaganj 400 kv Mathura- Jawaharpuram 400 kv Banda-Orai D/C 400 kv Gonda substation, 400 kv Gonda- Shahjahanpur (PG), 400kV Tanda-Gonda 765/400 kv ICT-2, 765 kv Mainpuri- Unnao, 765 kv Mainpuri-Hapur, 765 kv Mainpuri Bara-2, LILO of Mainpuri-Greater Noida at Khurja 765 kv Mainpuri- Hapur LILO of 765 kv Mainpuri-Greater 18 Downstream Network status No underlying connectivity No underlying connectivity 220 kv Aligarh-Atrauli D/C are yet to be commissioned 220 kv Side is connected to 220 kv Sikandrabad S/S only. No underlying connectivity 220 kv side is connected to Chhata only 220 kv Banda- Chitrakoot D/C is pending 220 kv side is connected to 220 kv Gonda and Bahraich 220 kv side is connected to 220 kv Hapur S/S only No downstream network is present at

19 ICT-1, connected to Agra, Meerut, Hapur and Mainpuri 12 LILO of Paricha-Mainpuri at Orai, LILO of Mainpuri-Orai at 765/400kV Mainpuri & LILO of Paricha-Mainpuri at 765/400kV Mainpuri, 400/220kV Orai ICT-1 & 2 Noida at Khurja, 765/400 kv ICT kv level 400/220kV Orai is connected to 220kV Orai & Kanpur only Commissioning of underlying network at these nodes would be helpful in relieving constraints in UP control area & would help in meeting high demand in summer/monsoon months later. UP SLDC may please appraise about remaining upcoming connectivity of above network and associated 220kV or underlying network along with time line. 18. Shifting of Rihand-III to Western region as per Planned connectivity It is for information to the members that Rihand-III (Unit#5 & 6) has been shifted from NR to western region on 28 th Nov 2017 in line CEA/CTU/NRPC/WRPC decision to shift after commissioning of HVDC Champa-Kurukshetra bipole along with the transmission planning approved in 29th Standing committee meeting of WR. Evacuation of Rihand Stage-III & VSTPS Stage-IV as per approved plan (In 29th Standing Committee of WR)- a. 765kV Rihand(III)-Vindhyachal PS-2 X S/c lines (Initially charged at 400kV) b. 400kV VSTPS Stage-IV-Vindhyachal PS-D/c c. 765/400kV Vindhyachal PS Substation along with 2x 1500MVA ICT s d. 765kV Vindhyachal PS-Satna 2 X S/c e. 765kV Sasan-Vindhyachal PS-S/c f. 400kV Sasan-Vindhyachal PS-D/c g. 765kV Satna-Gwalior 2 X S/c h. 765kV Gwalior-Jaipur 2 X S/c lines. As HVDC Champa-Kurukshetra Bipole has been synchronized & operational and all transmission network associated to generation plant had been commissioned, shift over of Rihand Stage-III (2X500 MW units) from NR to WR was planned on 24 th Nov 2017 as per Guidelines circulated by NLDC for this purpose enclosed as Annex-V. Due to some technical issues in synchronization trolley at Rihand end, the shifting of Rihand-III finally took place on 28th Nov Simulation studies were carried out to assess the impact of synchronization. Based on the studies it was decided that the synchronization shall be done when the angular separation between Rihand and Vindhyachal Pooling is within 3 degrees, with Rihand bus leading. In order compute the angular separation the following PMUs were used- I. PMU on 400kV Vindhyachal-Sasan Ckt-1 at Vindhyachal PS II. PMU on 400kV Rihand-Rihand HVDC Ckt-I at Rihand. A display for real-time monitoring was also created. 19

20 It shall be noted that scheduling of Rihand-III would continue to be done by NRLDC itself. NTPC has reported regarding problem of excessive vibrations in GTs of Rihand stage 3 when Rihand Dadri one pole was in ground return mode. NTPC may share its observations and report on above. 19. Monitoring of Fog Using satellite Picture NRLDC -IMD has developed WEB-Portal for Power Sector. In the Web Portal FOG forecast is available in Regional Summary and fog forecast issued by IGI Airport. The real time development of fog can be monitored using Colour composite images available from Satellite at the Portal. NRLDC shall give presentation on the above subject. 20. Load forecast: Load forecast on daily basis has already been mandate by CERC and same has been discussed in numbers of previous OCC/TCC meeting. In line with CERC compliance and decision taken in OCC/TCC, each state control area has started sharing its forecast on daily basis to NRLDC. The comparison between forecasted & real time data is made available at NRLDC Control Room for use of System operator. However, it has been found that, the load forecast data shared by states is not regularly updated, especially on Saturday & Sunday. Same is required to be updated on regular basis. States may please like to provide reasons for not updating the forecast data regularly and actions being taken to avoid this in future. 21. Deviation Violation Deviation from schedule of all NR states for last 30 days is attached as Annexure-VI: It is observed that most of the states are deviating from their schedule. All constituents are requested to provide reasons for such large and almost continued deviation from the schedule & remedial measures taken to arrest such deviations in future. It is further to be noted that Rajasthan is reducing its load abruptly by ~500MW at 04:00hrs mark and increasing load by ~1000MW at 06:00hrs. which leads to excursions in grid frequency as well. It has been communicated on no. of occasions & is also well known that all states shall try to increase/decrease load gradually especially at hourly boundary marks so as to avoid frequency excursions in the grid. 20

21 21

22 22

23 Further plots above show that some of the states such as Rajasthan, Haryana, UP and Uttarakhand were overdrawing from the grid when frequency remained below the band especially from 06:00hrs to 18:00hrs. These states are requested to give proper explanation for the same & actions taken to avoid such instances in future. 22. Reliability Issues: Rajasthan: N-1 non-compliance at 400/220kV Jodhpur, Sikar and Merta S/s needs to be monitored especially in upcoming winter season when high demand is observed in Rajasthan control area. Simulation studies may be carried out to identify alternate paths for supplying power at underlying n/w of Jodhpur & Merta to make ICT loading N-1 compliant before high demand in winter is experienced. Uttar Pradesh: ATC of UP control area has increased to 8300MW from 15th October onwards. N-1 non-compliance has been observed at 400/220kV ICTs of Azamgarh, Moradabad, etc. Evacuation issue of Lalitpur/Parichha & Bara TPS under N-1-1 contingencies is still present. Evacuation issues of Anpara-D/Anpara-C under N-1 contingency of 765kV AnparaC-Unnao. Jammu & Kashmir: 400/220 kv Wagoora (main supply point) where 4x315 MVA ICTs remain fully loaded during winter months and therefore N-1 criteria gets violated. High MVAr drawl is reported at Wagoora S/s which results in low voltages. 220 kv lines from Wagoora (220 kv Wagoora-Ziankote D/C and 220 kv Wagoora-Pampore D/C) remain loaded upto MW and therefore N-1 criteria gets violated. Low voltages are experienced due to high loading of intrastate network of valley power system. Tripping of connecting 400 and 220kV lines during inclement weather of high snowfall/storm and thus valley islanding and collapsing is observed. 23. Frequent forced outages of transmission elements The following transmission elements were under frequent forced outages during the month of Nov 17: S. NO. Element Name No. of forced outages Utility 1 400kV Aligarh(UP)-Sikandrabad(UP) ckt-2 6 Uttar Pradesh 2 HVDC Champa(WR) - Kurukshetra(NR) line-1 6 POWERGRID 3 HVDC Champa(WR) - Kurukshetra(NR) line-2 6 POWERGRID 4 400kV Dhuri(PSTCL)-Talwandi Sabo(PSTCL) ckt-2 6 Punjab 5 400kV Dhuri(PSTCL)-Talwandi Sabo(PSTCL) ckt-1 5 Punjab 6 400kV Nakodar (PSTCL)-Talwandi Sabo 5 Punjab 7 400kV Mukatsar (PSTCL)-Talwandi Sabo ckt-2 4 Punjab 8 400kV Moga(PG)-Talwandi Sabo 4 Punjab 9 400kV Bikaner(RVPNL)-Deedwana (RRVPNL) 4 Rajasthan kV Aligarh(UP)-Sikandrabad (UP) ckt-1 4 Rajasthan kV Agra(PG)-Jaipur South (PG) ckt-2 4 Rajasthan 23

24 The complete details are attached at Annexure-VII. It could be seen that issues like no auto-reclosing, mal-operations, HVDC protection operation, delayed clearance of fault are observed in most of the cases. The frequent outages of such elements affect the reliability and security of the grid. Hence, Utilities are requested to look into such frequent outages and share the remedial measures taken/being taken in this respect. Members may discuss. 24. Multiple element tripping at 400kV Panki(UP) station during relay testing work: At 16:42hrs of 16 th Nov 2017, during relay replacement work at 400kV Panki end of 400kV Panki-Aligarh ckt, bus bar protection operated at 400kV Panki (UP) substation. It resulted into tripping of all elements connected at 400kV voltage except 400kV Panki-Kanpur ckt-1. The following PMU plot of Kanpur voltage is showing no fault in the system. During this event, 400kV Panki-Unnao ckt, 400kV Kanpur-Panki ckt- 2, 400kV Panki-Aligarh, 400kV Panki-Rewa Road and 400/220kV 240MVA ICT-1 & 2 at Panki (UP) tripped. 400kV Panki (UP) substation has DMT bus scheme in which the tripping of both the buses is doubtful. Preliminary report has been received from UPPTCL but detailed report along with DR/EL is still awaited. Extract of the report: 24

25 Following are the points of concern: Operation of both bus bar protections during relay operation for 400kV Panki-Aligarh ckt at Panki end. Non-tripping of 400kV Kanpur-Panki ckt-1 from Panki end during bus bar protection operation. Earlier during the incident of 2 nd Nov 2017, similar situation arose whereas 400kV Kanpur-Panki ckt-1 was not tripped during bus fault. Is procedure for relay replacement followed during relay replacement work at 400kV Panki (UP). Remedial measure to reduce mal-operation during testing and commissioning. Frequent tripping observed at 400/220kV Panki (UP) station. Tripping details is tabulated below: 25

26 Element Name Type Voltage Level Owner Outage_date Outage_tRevival_date Revival_ Reason / Remarks Muradnagar-Panki Line 400 kv UPPTCL 13/06/ :44 13/06/ :08 Others Panki-Unnao Line 400 kv UPPTCL 13/06/ :44 13/06/ :19 Transient fault Panki 240 MVA ICT 1 ICT 400/220 kv UPPTCL 28/03/ :11 28/03/ :15 LA of ICT-1 burst at panki. Panki 240 MVA ICT 2 ICT 400/220 kv UPPTCL 28/03/ :11 28/03/ :50 ICT -1 LA burst at panki. Kanpur(PG)-Panki(UP) 1 Line 400 kv PGCIL 30/01/2016 5:53 30/01/2016 7:08 Tripped on High voltage Allahabad Rewa Road(400kV) - Line 400 kv UPPTCL 30/01/2016 5:53 30/01/2016 8:18 Phase to earth fault Kanpur(PG)-Panki(UP) 2 Line 400 kv PGCIL 10/3/ :25 10/3/ :54 Bus Bar-B protection operated at Panki Kanpur(PG)-Panki(UP) 2 Line 400 kv PGCIL 6/4/ :30 6/4/ :13 Bus B dead at Panki end Aligarh - Panki Line 400 kv UPPTCL 6/4/ :30 6/4/ :53 Bus B dead at Panki end Kanpur(PG)-Panki(UP) 2 Line 400 kv PGCIL 27/05/2017 3:12 27/05/2017 5:02 LA and CT blast of ICT -2 at Panki. Allahabad Rewa Road(400kV) - Line 400 kv UPPTCL 27/05/2017 3:12 27/05/2017 5:08 LA and CT blast of ICT -2 at Panki. Kanpur(PG)-Panki(UP) 1 Line 400 kv PGCIL 27/05/2017 3:12 27/05/2017 5:57 LA and CT blast of ICT -2 at Panki. Panki 240 MVA ICT 1 ICT 400/220 kv UPPTCL 27/05/2017 3:13 27/05/2017 6:01 R phase LA and CT blast of ICT-II at Panki R phase LA and CT blast of ICT-II at Panki / charged on Panki 240 MVA ICT 2 ICT 400/220 kv UPPTCL 27/05/2017 3:13 21/07/ :12 no load. Panki 240 MVA ICT 2 ICT 400/220 kv UPPTCL 2/11/2017 7:01 2/11/ :45 Panki 240 MVA ICT 1 ICT 400/220 kv UPPTCL 2/11/2017 7:01 2/11/ :42 Panki 400 kv Bus 1 BUS 400 kv UPPTCL 2/11/2017 7:01 2/11/ :01 Panki 400 kv Bus 2 BUS 400 kv UPPTCL 2/11/2017 7:01 2/11/ :01 As reported there was fault in B ph Unnao line B ph Kanpur(PG)-Panki(UP) 1 Line 400 kv PGCIL 2/11/2017 7:01 2/11/ :29 conductor snapped and fallen down on the bus and Allahabad Rewa Road(400kV) - Line 400 kv UPPTCL 2/11/2017 7:01 2/11/ :52 caused tripping of Bus and all 400 kv lines from Panki Aligarh - Panki Line 400 kv UPPTCL 2/11/2017 7:01 2/11/ :48 Kanpur(PG)-Panki(UP) 2 Line 400 kv PGCIL 2/11/2017 7:01 2/11/ :32 Panki-Unnao Line 400 kv UPPTCL 2/11/2017 7:01 2/11/ :01 UPPTCL may kindly look into the multiple element tripping and share the DR/EL and detailed report along with remedial measures taken and to be taken for this tripping and tripping mentioned in the above table. 25. Multiple element tripping at 765/400kV Unnao substation: At 17:50hrs, there was a fault in 63MVAr 400kV Bus reactor at 400kV Unnao (UP). Reactor CB didn t open within 200ms, it resulted into LBB (Local Breaker Backup) protection operation for 400kV Bus-1 of Unnao station. All the elements connected to 400kV Bus-1 of Unnao (UP) station tripped. At the same time bus bar protection for 400kV Bus-2 also operated due to bus tied operation in 400kV Unnao-Bareilly ckt-1. In PMU plot 2-3kV voltage dip observed in all three phase. The PMU plot is as below: 26

27 Complete station outage was frequently occurred due to bus tied operation in DMT scheme. Following were already discussed and approved in PSC (Protection Sub Committee) meeting: During operation of isolator from one bus to other bus in DMT scheme and bus tied operation on relay panel would be checked physically. Bus Tied operation status shall be visible to all substation operator. Sensitize all operation staff for bus tied operation alarm. Bus Tied alarm to be attended on priority. Fault in 63MVAr bus reactor resulted into tripping of following elements: 400kV Unnao-Lucknow (PG) ckt-1 &2 400kV Unnao-Agra(UP) 400kV Unnao-Panki 400kV Unnao-Bareilly ckt-1 &2 400kV Unnao- Lucknow (UP) 1000MVA, 765/400kV ICT-1, 2, 3 at Unnao (UP) 315MVA, 400/220kV ICT-1 &2 at Unnao (UP) 63MVAr Bus-Reactor at Unnao (UP) Following are the points of concern: Reason of delayed opening of 63MVAR CB (transfer bus coupler) at Unnao (UP). In case of operation of bus bar protection for 63MVAr bus reactor (charged through transfer bus), transfer bus coupler should have tripped instead of 400kV Bus-1 at Unnao (UP). Operation of both bus bar protection. Preventive measures taken by UPPTCL on earlier decision of PSC. UPPTCL may kindly apprise about the event, remedial measures taken and share the detailed report along with all the DR/EL. 27

28 All the NR constituents may kindly submit the action taken report on PSC recommendation on bus tied operation in DMT scheme. 26. Multiple element tripping at 400/220kV Dadri substation: 400 kv bus-2 of Dadri Thermal was under shutdown from 9:00hrs for attending hotspots. At 17:18 hrs, 400 kv bus-2 was charged through Harsh Vihar Circuit 1. Bus-2 was on floating condition and no other lines / units were connected to 400 kv bus 2. All the 400kV elements charged through 400kV Bus-1 at Dadri Thermal. At 17:29hrs, Jack bus jumper of Unit-6, Y-phase snapped and fell on bus-i B-phase resulting in tripping of 400 kv bus-1. All running units (Unit- 3, 4, 5 and 6) of Dadri Thermal tripped. Name of the tripped elements are as below: 400kV Dadri(TH)-Harsh Vihar(DTL) -1&2 400kV Dadri(TH)-Panipat(BBMB) 2 400kV Dadri(TH)-Maharanibagh(PG) 400kV Dadri HVDC 400kV AC BUS A&B Dadri 500 MVA ICT 1, 2, 3, 4 & 5 Dadri Thermal Unit -3, 4, 5 & 6 500kV HVDC Rihand-Dadri The PMU plots are as below: PMU plot of phase voltages of Bawana and Dadri 28

29 PMU plot of frequency and rate of change of frequency of different stations During the incident HVDC Rihand-Dadri bipole carrying power order of 500MW also tripped. It resulted into SPS operation for HVDC Rihand-Dadri and shed load in group C & D. Till now, details received only from Samaypur BBMB and load shedding reported ~86MW on 220kV Samaypur-Palwal D/C. NTPC may kindly apprise about the event, remedial measures taken and share the detailed report along with all the DR/EL. Punjab, Haryana, Rajasthan and UP may kindly submit the report of SPS operation details. Lower load relief is concern needs to be looked into. 27. Multiple element tripping events in Northern region in the month of Nov-2017: A total of 17 grid events occurred in the month of Nov Out of these, 5 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 is attached at Annexure-VIII. Further, despite persistent discussions/follow-up in various OCC/PCC meetings, the compliance of the regulations is still much below to the desired level. Consolidated status plots are as below: 29

30 2, 20% Over Voltage 1, 10% Non operation of Bus Bar Protection 1, 10% Protection Co-ordination 1, 10% Wrong Bus bar protection Wrong Switching operation 1, 10% Fog related earth fault 1, 10% 2, 20% Mal operation of Protection Multiple line trippings on an earth fault 1, 10% 30

31 Members may take expeditious actions to avoid such tripping in future and discuss the same. Moreover, utilities may impress upon all concerned for providing the Preliminary Report, DR/EL & Detailed Report of the events in line with the regulations. Members may like to discuss. 28. Details of tripping of Inter-Regional lines from Northern Region for NOV 17: A total of 19 inter-regional lines tripping within a month occurred in the month of NOV 17. The list is attached at Annexure-IX. The status of receipt of preliminary reports, DR/EL within 24hrs of the event and fault clearing time as per PMU data has also been mentioned in the table. The non-receipt of DR/EL & preliminary report within 24hrs of the event is in violation of various regulations. As per regulations, all the utilities shall furnish the DR/EL, flag details & preliminary report to RLDC/RPC within 24hrs of the event. They shall 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 could be observed from attached table that not all information regarding the tripping is received from the utilities. The summary of the attached table is as below: Preliminary Report or DR/EL received within 24hrs: 6 events DR/EL received after 24hrs: 4 events Line tripping without any fault (based on PMU data): 6 events 31

32 Consolidated details plot is as below: Members may please note and advise the concerned for taking corrective action to avoid such tripping as well as timely submission of the information. 29. Frequency response characteristic: One FRC based event has occurred since last OCC meeting. Description of the events is as given below: Table: S. No. 1 Event Date 12-Nov- 17 Time Starting End Event Description Frequency Frequency Δf (in hrs) (in Hz) (in Hz) All lines from Talwandi Sabo tripped, Due to Loss of 07:13hrs Evacuation path at Talwandi Sabo generation loss of 1100 MW occurred. The Hon ble CERC approved procedure has already been shared with all concerned during previous OCC meetings. FRC observed for each state control area for the events is tabulated below: 32

33 State Name FRC for 12- Nov-17 Talwandi Sabo event Remarks FRC calculation for Apr onwards Average Median PUNJAB 174% Talwandi Sabo SCADA data became suspect 24% 20% HARYANA 92% Decrease in Schedule 19% 14% RAJASTHAN 6% 19% 8% 5% DELHI -232% Increase in Schedule 26% 13% UTTAR PRADESH -13% -31% 29% 15% UTTARAKHAND 16% 7% 14% 16% CHANDIGARH -122% Small Control area 11% 1% HIMACHAL 10% -7% PRADESH 0% 1% JAMMU & 179% 19% KASHMIR 14% 0% NR 36% 11% 14% 14% In the above table, Average and Median value of FRC calculation of total 15 events (FY ) is calculated. FRC calculation of all ISGS station for the events since last OCC meeting along with median and average value of total 15events is tabulated below: State Name FRC for 12-Nov-17 Talwandi Sabo event FRC calculation for Apr-2017 onward Average Median Singrauli 0% -4% 0% Rihand-1 39% 26% 22% Rihand-2-8% 3% 6% Rihand-3 20% -2% -1% Dadri-1 73% 50% 51% Dadri -2 24% 27% 27% Dadri-Gas 0% -7% 0% Unchahar 0% 0% 0% Anta No generation 0% 0% Auraiya No generation 0% 0% NAPS 22% 7% 3% 33

34 RAPS-B 14% 6% 6% RAPS-C 19% 5% 4% Jhajjar 42% 34% 32% Sh. Cement 0% 6% 7% Badarpur No generation 3% 3% Faridabad 0% -7% -3% Khedar No generation -1% 0% Panipat -5% 1% 0% Yamuna Nagar No generation Data Suspect Data Suspect CLP Jhajjar -11% 1% 0% Suratgarh 5% 5% 5% Chabra No generation Data Suspect Data Suspect KTPS -1% -5% -1% Rajwest 0% 0% 0% Anpara 1% 0% 2% Anpara C 0% 7% 0% ROSA 20% 9% 10% Tanda -6% 2% 1% Paricha 0% -1% 0% Obra 8% 4% 8% Ropar 0% 26% 19% State Name FRC for 12-Nov-17 Talwandi Sabo event FRC calculation for Apr-2017 onwards Average Median Chamera-1-20% 22% 11% Chamera-2 0% 0% 0% Chamera-3 1% 16% 12% Bairasiul No generation 3% 2% Salal 14% 2% 2% Tanakpur -16% 3% 0% Uri-1 SCADA data suspect 1% 1% 34

35 Uri-2 SCADA data suspect 15% 0% Dhauliganga 12% 46% 25% Dulhasti -28% 11% 3% Sewa-II No generation 11% 0% Parbati-3* 0% 6% 5% Jhakri SCADA data suspect 20% 17% Rampur 0% 11% 0% Tehri SCADA data suspect 17% 0% Koteswar 29% 4% 0% Bhakra 0% 1% 0% Dehar 5% -4% 1% Pong -5% -3% -3% Karcham Wangtoo* SCADA data suspect 62% 40% Malana-2* No generation Data Suspect Data Suspect Budhil* SCADA data suspect 14% 0% VishnuPrayag* SCADA data suspect 1% 0% Koldam 9% 11% 9% AD Hydro 0% 0% 0% Sainj 7% 3% 3% In line with the decisions taken during various OCC meetings, the time and date of the FRC events were ed to respective utilities. The details have been received from UP, NHPC only. Utilities may kindly submit the FRC of their control areas and reason of poor response. ISGS generators may kindly also submit the FRC response details along with reason of poor response. 30. Revision of document for Reactive Power Management for Northern Region: Reactive Power Management document for Northern region is due for revision. The last updated document link is as below: Document is password protected and password was already informed to all the NR constituents through letter dated 30 th Dec For revision in the document, following information needs to be updated in desired format: List of 765kV, 400kVand 220kV transmission line List of Line reactors 35

36 List of Bus Reactors List of FSC/TCSC& SVC List of tertiary reactors on 33kV side of 400/ 220/ 33 kv ICT s. List of shunt capacitors OLTC details of ICT s Generator transformer tap details List of Over Voltage setting of 400kV & above transmission line Generator reactive power capability curve for Generating stations Filters details of HVDC Agra-BNC & HVDC Champa-Kurukshetra and different mode of operation. Formats were attached as Annexure-36 of 139th OCC Agenda Despite of continuous effort and follow up in last four OCC meeting details are still awaited from most of the constituents. Status of details received is tabulated below: Reactive Power Document Data Received from Data Not received from Haryana Malana-II HP Rosa-Reliance Adani J&K NHPC UP APCPL NPCIL Delhi JAYPEE POWERGRID NR-1* NTPC POWERLINK POWERGRID NR-3* Punjab PKTCL Rajasthan Railway Shree Cement SJVNL Haryana THDC Uttarakhand BBMB Chandigarh Karcham (JSW) Malana-I Others AD Hydro POWERGRID NR3 Greenko Budhil Constituents may provide the feedback, suggestion and updated information by 20 th December

37 31. Revision of document for System Restoration Procedure (SRP) for Northern Region: System restoration procedure for Northern region is due for revision. The last updated document link has already been shared with the constituents. Despite of continuous effort and follow up in last four OCC meeting details are still awaited from most of the constituents. Status of details received is tabulated below: System Restoration Procedure Data Received from Haryana NHPC Punjab NPCIL Data Not received from Delhi Rajasthan Rosa (Reliance) Greenko Budhil NTPC POWERGRID Railway UP Uttarakhand BBMB Chandigarh APCPL Adani SJVN HP J&K Malana-I JAYPEE POWERLINK PKTCL Shree Cement THDC Karcham (JSW) AD Hydro Malana-II Others Constituents are requested to go through the document and provide any modification/addition in respect of their system. SLDC/Generating utilities are requested to kindly update and share the restoration procedure in respect of their state/generating station. 32. Mock Black start exercises for year : As per Indian Electricity Grid Code (IEGC) clause 5.8(b) Mock trial runs of the procedure for different sub-systems shall be carried out by the Users/ CTU/ STU at least once every six months under intimation to the RLDC. 37

38 The summary/schedule of mock black start exercise of ISGS hydro stations carried/to be carried out is tabulated below: S. No. Proposed Date Revised Date Generating station Remarks 1 24-Oct-17 Koldam Carried out successfully Oct-17 Jan-Feb 18 Nathpa Jhakri & Rampur 3 3-Nov Nov Deferred. Tentatively in Jan- Feb Nov-17; To be revised again Dhauliganga Deferred due to load management. 13-Nov-17; Again to be revised Salal Deferred due to pending consent from SLDC-J&K Nov-17 3-Nov-17 Sewa-2 Carried out successfully Nov-17 To be revised Budhil 7 17-Nov-17 To be revised Malana-2 Deferred by Plant 8 21-Nov-17 Parbati Nov Dec-17 Chamera-3 Carried out successfully Nov-17 Uri-I, II HEP, Lower 06-Dec-17; To Deferred due to pending consent Jhelum HEP, Pampore be revised again from SLDC-J&K. GT s & Upper Sindh 11 5-Dec-17 1-Dec-17 Chamera-2 Carried out successfully. Island 12 8-Dec-17 1-Dec-17 Chamera-1 collapsed during stage Dec-17 Bairasiul 14 4-Jan-18 Koteshwar 15 9-Jan-18 AD Hydro Jan-18 Karcham Wangtoo Jan-18 Tehri In 140 th OCC meeting Rajasthan informed about tentative dates of mock black start exercise for state generating units. SLDC s may also carryout mock black-start of station in their respective control area & inform the tentative dates to the OCC as well as outcome of these exercises. The proposed Hydro Power Stations to undergo the exercise are as follows: S. NO. Utility Hydro Power Station Installed Capacity(MW) 1 Baglihar 3x150 2 Baglihar stage-2 3x150 3 J&K Lower Jhelum 3x35 4 Upper Sindh 2x11+3x35 5 Sainj 2x50 6 Larji 3x42 7 HP Bhabha 3x40

39 8 Malana -I 2x43 9 Baspa 3x Anandpur Sahib 4x33.5 Punjab 11 Ranjit Sagar 4x Rihand 6x50 13 Obra 3x33 UP 14 Vishnuprayag 4x Srinagar (Alaknanda) 4x Gamma Infra 2x76+1x73 17 Shravanti 6x75 18 Ramganga 3x66 19 Chibro 4x60 20 Uttarakhand Khodri 4x30 21 Chilla 4x36 22 ManeriBhali-I&II 3x30+4x76 23 IP Extn GTs 6x30+3x30 24 Pragati GPS 2x x121.2 Delhi 25 Rithala 3x36 26 Haryana Faridabad GPS 2x x During last winter, SLDCs had been requested to carry out mock drills and share their experiences. However, the information is yet to be received. The information may please be shared by SLDCs and program for this year s mock black start exercises shall also be shared. SLDCs shall submit the reports of black start exercise in their respective control area. SLDCs may also identify further generating stations/unit for black start exercise. Members may please discuss. 33. Deviation Violation The deviations from the schedule are to be minimized. Some of the violations brought out by the Regulations are given below: Violation of regulation 7 (1) of CERC (Deviation Settlement and related matters) Regulation 2014: (Limit on volume of deviation) Table-1: Period: to S. No. State 1 Himachal Pradesh 2 Rajasthan 3 Haryana O/D: Violation in Overdrawl U/D: Violation in Underdrawl O/D 28 U/D 3 O/D 25 U/D 6 O/D 24 U/D 6 Average No of Blocks per day 39

40 4 Uttar Pradesh 5 Punjab 6 Uttarakhand 7 Jammu & Kashmir 8 Delhi 9 Chandigarh O/D 14 U/D 38 O/D 13 U/D 16 O/D 7 U/D 27 O/D 5 U/D 5 O/D 2 U/D 3 O/D 1 U/D 1 Remarks: Violation is considered while Deviation from Schedule of a Utility is 150 MW or 12% of Schedule whichever is lower. Violation of regulation 7 (10) of CERC (Deviation Settlement and related matters) Regulation 2014: (Sustained deviation from schedule in one direction). Period: 01-Nov-17 to 26- Nov - 17 CHD HP PDD J&K UK Delhi RJ HY UP PUJ Total No. of Violations Members may like to discuss and take action to avoid such violations. 40

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55 Follow up issues from previous OCC Ms - Status update Annex-11 SNO Description of Agenda point 1 Monitoring of schemes funded from PSDF (Agenda by NPC) 2 Sub-stations likely to be commissioned in next 6 months. 3 Cleaning and Replacement of porcelain insulators 4. Healthiness of defence mechanism: Selfcertification 5. UFR REPLACEMENT 1. BBMB had informed that replacement of static relays by numerical relays at 7 sub-stations (5 stations in Haryana at Panipat, Dhulkot, Kurukshetra, Jagadhari & Hissar) by HVPNL was pending 2. In PTCUL the static type UFRs were still installed on Transformers/feeders emanating from 132KV Majra and Jwalapur Substations and 220KV Ramnagar, Roorkee and Details The latest status of the schemes for which grant has been sanctioned from PSDF for the schemes in Northern Region ANNEXURE-13/1 The details of the substations of Power Grid and their required downstream network as updated in the last OCC/ RPC meeting is enclosed at Annexure-13/2. The Minutes of the Meeting of insulator cleaning held on stands issued vide letter of even no dated Report of Mock exercise for healthiness of UFRs carried out by utilities themselves on quarterly basis is to be submitted to NRPC Secretariat and NRLDC. 1.HVPNL representative assured that the relays already stands handed over to BBMB and the work is targeted to be completed by PTCUL representative intimated that the order for numeric relays procurement has been placed and he assured that efforts would be made to get the relays replaced by Status update required Utilities are requested to expedite implementation of the schemes and submit information of physical as well as financial progress in the prescribed format by first week of every month on regular basis to Member Convener, PSDF Project Monitoring Group (AGM, NLDC and POSOCO) with a copy to NPC Division. All the concerned states are requested to submit the details of the downstream network associated with these POWERGRID substations along WITH THE ACTION PLAN OF THEIR PROPOSED/APPROVED NETWORKS. POWER GRID AND ADANI HAVE SUBMITTED DATA All other utilities are requested to submit the data as required in the minutes issued. All utilities are advised to certify specifically, in the report that All the UFRs are checked and found functional. The reports of quarter ending 12/2017 should be submitted in January by all utilities in one go HVPNL to update status PTCUL to update

56 Rishikesh Substations 6. Strengthening of Intra- State transmission system 7. Installation of adequate static and dynamic reactive power compensators 8 SPS for Interruption of import by NR at 765 kv Agra (from WR). Action Plan of the STUs awaited from HVPNL The 125 MVAR reactor at Hinduan & Merta were expected to be commissioned by & respectively 140 th OCC meeting: POWERGRID informed that the technical bid wass under evaluation and the LOA would be placed by November th TCC/40 th NRPC meeting: POWERGRID informed that the delay in the tendering process was because of the implementation of GST and the Letter of Award (LoA) would now be placed by November 2017 with the completion schedule of February Ist OCC meeting: POWERGRID assured that they plan to adhere to the target date of February 2018 HVPNL to update Also all SLDCs should give half yearly feedback ending 12/2017 in the month of 1/2018 to STU regarding bottlenecks, constraints and overloading in the State transmission network for proper transmission planning. RRVPNL to update the status POWER GRID to update progress 9 Mapping of Feeders in SCADA In the 141 st OCC meeting members were informed about the Compendium of SPS in NR (Annexure-_9 of the MOM_) which was released in the 40 th NRPC meeting. All the utilities were requested to go through the compendium and identify feeders concerning their state and map the same in SCADA. Members to update progress.

57 10 Mock Testing of SPS for 765 kv Agra-Gwalior line 141 st OCC meeting: Representative of NRLDC informed that the above logic shall be implemented for the time. However, he requested POWERGRID to search for avenues for getting the signal from circuit breaker from both the ends for verifying the status of availability of the lines. He informed that, in the presently implemented scheme a signal is being sent to Gwalior S/S from Agra S/S for providing further signal for backing down generation in WR. He requested POWERGRID to look if some modifications can be made in the communication equipments at Gwalior for getting the status of CB at Agra end. POWERGRID informed that they would look into the matter. POWER GRID to update progress SPS for ICTs at 765 kv Unnao sub-station SPS for Kawai Kalisindh - Chhabra generation complex: SPS for Lalitpur Generating station: Planning, procurement and deployment of Emergency Restoration System 141 st OCC meeting: UPRVUNL representative intimated in the meeting that the work at Unnao end stands completed. Further he intimated that the offer to incorporate the logic of SPS at Anpara D has been received and the order shall be placed by them very shortly. He assured that the work is expected to be completed by He also stated that the cost of the logic of SPS at Anpara D is to be indemnified by UPPTCL. 141 st OCC meeting: The representative of RVPNL informed that the tendering process was in progress and all out efforts are being made to implement the scheme as per target date of st OCC meeting: UPPTCL representative intimated that the scheme has been commissioned at LPGCL end. If any 765 kv Lalitpur-Agra line trips, SPS would operate for their complex. He further stated that the signal at FATEHBAD end has not been received. The issue was being looked into so that work can be completed by The latest status as updated by the members in 141st OCC is as under: DTL :- Order had been placed for 02 nos. of ERS. Delivery has been completed. Training imparted in September PSTCL: - Order has been placed. Supply expected by End November, UPPTCL: - 02 nos. of ERS have been received. Status to be updated Status to be updated Status to be updated Status to be updated

58 RRVPNL: - HVPNL: - PTCUL- HPSEBL BBMB - J&K- Will not be procuring Earlier it was informed that in place of ERS, spare towers would be procured worth Rs Two crore. In 138 th OCC it was informed that the management is reviewing the issue of procurement of ERS.In 141 st OCC meeting, HVPNL representative present intimated that it has been decided by HVPNL to procure I SET of ERS.MS NRPC lauded the decision of HVPNL and it was requested that documents/ details in regard of the procurement of ERS be submitted. NIT placed. Supply expected in 3 month. Representative present intimated that the status has not been updated by STU of PTCUL still. Discussions being held with vendor. Suitability of ERS for critical locations is being explored. Representative present intimated that the updated status from STU will be intimated within a week. Partner states have agreed to provide the ERS as and when required by BBMB. MS, NRPC observed that Rajasthan a partner state of BBMB has not yet reviewed the decision of procuring ERS. The same needs to be taken by BBMB with Rajasthan Order has been placed for 2 nos. ERS. 15 RGMO/FGMO compliance by generators in the region The updated status is enclosed at Annexure 13/3. All concerned utilities may update the information as desired in the last TCC & NRPC meeting. Information to be updated (Agenda based on letter by CERC) Also the work of mapping of RGMO/FGMO status, in SCADA should be expedited so that it would be completed within 3 months as desired in the last TCC & NRPC meeting. 16 LVRT issues of wind/solar generation As per the CERC order dated issued in Petition No. 420/MP/2014 wherein CERC has 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. Further as per the CEA Technical Standard for connectivity to the Grid (Amend.) Reg.2013 (sub clause (3) of Clause B 2 ) of the In the 138 th OCC meeting: RVPNL representative informed as under: The updated status of LVRT for wind generators stands submitted. Further as per directions of NRPC in 134 th OCC meeting regarding installation of LVRT on wind

59 station connected to the grid 06 months after publication of these regulations (i.e ) shall have the LVRT capability as depicted in the sub-clause. As LVRT are not installed on many of the wind turbines in State of Rajasthan, the issue is being regularly raised in the various meetings of NRPC without any result. generators, the SE (REMC) has been requested repeatedly to take up the issue with wind generators for ensuring compliance of CEA Regulations and CERC orders in this regard. As per the advice of the Sub- Committee in 137 th OCC meeting, the case has been forwarded to REMC wing to submit a petition to RERC for non-compliance of regulation. In the 37 th TCC/40 th NRPC meeting representative of RVPNL stated that the proposed petition has been submitted to the management for its consent and it would be submitted to the RERC by next month. RVPNL to update.

60 ANNEXURE Down Stream network by State utilities from ISTS Station: S. Substation No /220kV, 3x315 MVA Samba 2 400/220kV, 2x315 MVA New Wanpoh station 3 400/220kV, 2x315 MVA Parbati Pooling Station 4 400/220kV, 2x500 MVA Kurukshetra (GIS) 5 400/220kV, 2x500 MVA Bagpat GIS 6 400/220 kv, 2x315 MVA Saharanpur Downstream network requirement 2 nos. bays utilized under ISTS. Balance 4 Nos to be utilized 6 Nos. of 220 kv bays to be utilized 2 Nos. of 220 kv bays to be utilized. 8 nos. of 220 kv bays to be utilized 3 nos. of 220 kv downstream lines to Shamli, Muradnagar and Bagpat commissioned. Balance 5 Nos. of 220 kv bays to be utilized 2 nos. 220 kv downstream lines commissioned. (Saharanpur (UP) and Nanauta) Balance 4 Nos. of 220 kv bays to be utilized Schedule Apr. 13 Oct. 13 Planned system and Implementation Status JKPDD to respond JKPDD to respond Ready 220kV Charor- Banala D/c line (18km) was targeted for completion by 31/10/2017 on best effort basis. HPPTCL to confirm. Commissioned i). LILO of one circuit of Kaul- Pehowa 220kV D/c line ii). LILO of one circuit of Kaul- Bastara 220kV D/c line Work awarded with contractual completion date 02/01/2018. HVPNL to confirm. (i) Bagpat- Baraut 220kV S/c Line - Expected by July 2017 (ii) LILO of 220kV Muradnagar II - Commissioned Baghpat (PG) at Baghpat UP - expected by Sep 17 (iii) Bagpat(PG)-Modipuram New 220kV D/c-exp. by Oct.18 Commissioned. UPPTCL to confirm. (i) LILO of 220 kv Khara- Shamli at Saharanpur PG - expected by Sep (ii) Saharanpur(PG) - Sarsawa (new) 220kV D/c - expected by Dec UPPTCL to confirm /220kV, 2x315 MVA Dehradun Out of 6 bays, only two bays used. Balance 4 bays to be utilised. Commissioned. PTCUL to respond /220kV, 2x315 MVA Kotputli 9 400/220kV, 2x500 MVA Jaipur South 02 nos. 220kV downstream lines commissioned on Balance 2 Nos 220 kv bays to be utilized. Partially utilized. Balance 4 Nos 220 kv bays to be utilized. Commissioned Commissioned Kotputli(PG) Kotputli (RVPN) 220kV S/c line (existing) Kotputli(PG) Manoharpur (RVPN) 220kV S/c line (existing) Kotputli(PG) Bansur (RVPN) 220kV D/c line (completed but put on hold due to some telemetry issues) RRVPNL to confirm 220kV S/c line to Chaksu (existing) 220kV S/c line to Duni (existing) 220kV S/c line to Sez (existing) 220kV S/c line to Goner (existing) 220kV D/c line to Vatika (completed but put on hold due to some telemetry issues) RRVPNL confirmed that Line charged on & and telemetry has been done.

61 S. Substation No /220 kv, 2x315 MVA Sohawal 11 Shahjahanpur, 2x315 MVA 400/220 kv 12 Jalandhar, 1x 500 MVA 400/220 kv Downstream network requirement 6 Nos 220 kv bays to be utilized. Partially utilized. Balance 5 Nos. of 220 kv bays to be utilized. Partially utilized. Balance 2 Nos. of 220 kv bays to be utilized. Schedule Commissioned Commissioned Commissioned Planned system and Implementation Status 2 nos of bays utilized for Sohawal 220kV UP. 2 nos for Tanda New 220 kv S/s by June (Tanda New S/s is already connected to Tanda NTPC and Sultanpur) 2 nos for Barabanki 220 kv s/s under construction likely to be commissioned by August 17. UPPTCL to confirm the status UPPTCL to respond. PSTCL to respond nos. bays at Moga Partially utilized. Balance 2 nos. of 220kV bays to be utilized. Commissioned PSTCL informed that Moga Mehalkalan 220kV D/c line is under construction. PSTCL to confirm completion date 14 Hamirpur 400/220 kv 2x 315 MVA Sub-station 04 nos. 220 kv downstream lines commissioned under ISTS. Balance two bays to be utilised by HPSEBL Nov. 17 2x220 kv bays to be utilized for connecting 220/132kV Kangoo substation of HPSEBL by 220 kv Kangoo-Hamirpur D/c line. HPPTCL to confirm. 15 Kaithal 400/220 kv 1x 315 MVA Sub-station July 2017 (Shifting of Transformer from Ballabhgarh). Oct. 17 i). 220kV Kaithal(PG)- Neemwala D/c line - Work awarded on Tentative completion date is ii). 220kV S/s Neemwala-Tenders against opened for NIT dated HVPNL to update 16 Sikar 400/220kV, 1x 315 MVA S/s 2 Nos. of 220 kv bays Commissioned /220kV Kota Sub-station (1 No. of 400 kv Bay) Commissioned for Anta-Kota 400 kv S/c line of RRVPNL RRVPNL updated that Bay at 765kV Anta is not ready, however the work of 400kV S/C Kota (PG)- Anta line is under progress. Members may update and expedite the downstream system.

62 POWER SYSTEM DEVELOPMENT FUND STATUS OF IMPLEMENTATION Sl. No Name of State/Entity Committed (on ) award amount Awarded amount on date Funds disbursment status (Crs) Total Grant Fund Released (in Crs) 1 UPPTCL Installation of Capacitors and FSC. 11-May Mar Dec Uttar Pradesh Name of Entity UPPTCL UPPTCL Name of Scheme Renovation and Upgradation of protection system of substations. Replacement of the existing ACSR Conductor by HTLS Conductor for relieving congestion by UPPTCL Date of Sanction Accepted Cost (Crs) Grant Approved (Crs) Date of release of 1st installment Completion schedule as per DPR (Months) Revised schedule (as committed on ) Award Status (in Crs) 11-May Mar Dec Mar Present Status been sent to NLDC.Entity intimated that on account of location change revision in the scheme Panels delivered & commissioned. Erection of CT, PT is completed. UPPTCL Reconductoring of 11 Nos of 132kV Lines of the state network of UPPTCL for Relieving Congestion 16-May RRVPNL Renovation and Upgradation of protection system of substations 31-Dec Mar Jun Request for next intermediate grant is to be sent to PSDF Rajasthan RRVPNL Installation of Bus Reactors 31-Dec Mar Jun RRVPNL PSTCL 6 Haryana HVPNL 7 PDD-J&K Jammu & Kashmir PDD-J&K 8 Himachal Pradesh HPSEBL Smart Operation Mamgement System (STOMS) Provision of second DC Source at 220KV & 132KV Grid Sub Station Detailed Project Report Smart Grid Project Gurgaon City Fist Phase DLF Sub Station Area Renovation and Upgradation of protection system of substations in Jammu Renovation and Upgradation of protection system of substations in Kashmir Renovation and Upgradation of Protection System 19-May Jan Jan NIT under hold 28-Oct Mar Reactor at Merta is ready for commissioning and at Hindaun it will be commissioned by Dec 17. Further, request for next installment of Rs Cr. has been applied RRVPNL Communication Backbone "Smart Transmission Network & Asset Management System " 22-May Contract agreement has been signed and opening of dedicated bank account for both schemes is under progress by account wing 3 Delhi DTL Renovation and Upgradation of 17-Mar Nov Protection System LoA for Rs.18 Crores issued. 4 Uttrakhand PTCUL Renovation and Upgradation of Rs Crores contract is awarded. Rs Mar Nov Protection System Crores disbursed to Contractor. 5 PSTCL Bus bar protection 17-Mar Technical Bid opened on 25th August Punjab intuts rcvd from entities\j&k\psdf_review meeting_ _annexure-i - srinagar.docx 5-Jan May Jun Rs. 40 Crores contract is awarded. 9 PGCIL BNC-AGRA HVDC 10-Mar CPSU RECTPCL & PGCIL 11kV feeder monitoring 10-Mar PGCIL URTDSM Scheme 31-Dec Oct Jun Under completion DVC 10 NRPC NRPC ANNEX 13(2).xlsx Renovation and Upgradation of the protection and control system of Ramgarh Sub Station. Study Program on the integration of renewable energy resources 2-Jan May May Mar Completed intuts rcvd from entities\dvc\psdf_review meeting_ _annexure-i DVC Ramgarh Ss.docx Schme wise status

63 Status of RGMO/FGMO S.No. Power Station Unit size No of units Installed Capacity Units required to operate under RGMO/ FGMO as per IEGC Units operating under RGMO Units operating under FGMO with manual control to achieve RGMO Units operating with inoperative governor /locked governor Units exempted from RGMO/ FGMO by CERC Units applied to CERC for exemption/ extension Reason for seeking exemption/ extension Status not available Remarks CENTRAL SECTOR NTPC (Thermal) 1 Badarpur TPS 3x95 + 2x Singrauli STPS 5x x Rihand STPS 2x500+2x500+2x Dadri NCTPS 4x210+2x Unchahar-I TPS 2x Unchahar-II TPS 2x Unchahar-III TPS 1X Unchahar-IV TPS 1X COD to be completed 9 Tanda TPS 4x Anta GPS 3x x Auraiya GPS 4x x Dadri GPS 4x x Applicable from 01/10/ Faridabad GPS 2x x Khep 4x APCPL 15 Indira Gandhi STPS 3x NHPC 16 Bairasiul 3x Pondage of less than 3 hrs. 17 Salal 3x x ROR Scheme 18 Tanakpur HPS 3x ROR Scheme 19 Chamera-I HPS 3x Chamera-II HPS 3x Pondage of less than 3 hrs. 21 Chamera-III HPS 3x Uri I 4x ROR Scheme 23 Dhauliganga 4x Dulhasti 3x Sewa-II 3x Uri II 4 x ROR Scheme 27 Parbati III 4 x NLC 28 Barsingsar(NLC) 2x SJVNL 29 Nathpa Jhakri HPS 6x Rampur HPS 6x THDC Ltd. 31 TehriHPP 4x KoteshwarHPS 4x Mechanical governors NPC 33 RAPS-A 1x100+1x RAPS -B 2x RAPS-C 2x Nuclear units exempted

64 36 NAPS 2x JOINTLY OWNED (BBMB) 1 Bhakra (left + right) (2x108+3x126+5x157) Dehar 6 x Pondage less than 3 hours 3 Pong 6x Delhi 4 Indra Prastha Gas station 6x30+3x Pragati GasTurbines 2x104+1x Bawana 4x216+2x RajghatTPS 2X Rithala GPS 3x HPGCL 9 Panipat TPS 2x210+2x DCRTP(Y'Nagar) 2x RGTPP Hissar 2X Himachal Pradesh 12 GiriBataHEP 2X ROR 13 LarjiHEP 3X ROR 14 Bhabha(Sanjay)HEP 3x ROR 15 Bassi HEP 4x J & K 16 Baglihar (3x150+3x150) LowerJhelum 3x ROR 18 UpperSindh II 3x ROR Punjab 19 Ranjit Sagar HPS 4x AnandpurSahibHPS 4x ROR 21 MukerianHP 6x15+6x ROR 22 Shanan(Jogindernagar) 4x15+1x ROR 23 UBDC 3x15+3x ROR 24 GNDTP Bhatinda (2x110+2x120) GGSSTP Ropar 6x GHTP L' Mohabbat 2x210+2x Goindval (GVK) 2x Rajpura 2x Talwandi Saboo 3x Rajasthan 30 Kota TPS 2x110+3x210+2x Suratgarh 2x250+2x250+2x Chhabra 4x250+1x Jawahar Sagar 3x Rana Partap Sagar 4x Giral TPS 1x125+1x Rajwest 8x Unit 4 presently not in RGMO mode due to problem in EHC (Electro Hydraulic Controller)

65 37 Dhaulpur CCPP 2x110+1x Mahi HEP 2x25+2x Kalisindh TPP 2x Ramgarh TPP 1x x Not installed at DCPP since commisioning. Persuing with OEM after issuance of IEGC 5th amendment. Units age years, both plants are irrigation and canal based respectively. Not installed at RgTPP since commisioning. Persuing with OEM after issuance of IEGC 5th amendment. UP 41 Anpara TPS 3x x Obra TPS 2x50+2x94+5x Paricha 2x110+2x220+2x Harduaganj -D 1x60+1x105+2x Panki thermal 2x KharaHEP 3x MatatilaHEP 3x ObraHEP 3x RihandHEP 6x UJVNL, Dehradun 50 Chibro PS 4x Plant is presently operating manually 51 Khodri 4x controlled to achieve RGMO 52 Chilla 4x ROR plant 53 Tiloth (MB-I) PS 3x Dharasu (MB_II) PS 4x Plant is presently operating manually controlled to achieve RGMO Ram ganga 3x Water from the dam is released as per the requirement of Uttar Pradesh Irrigation department. Whenever the plant runs, there is a fixed discharge released from the Dam 55 as per UPID instructions 56 Dhalipur 3x ROR plant 57 Dhakrani 3x ROR plant 58 Kulhal.3x ROR plant 59 Khatima 3x ROR plant Private 1 MG TPS (CLP), Jhajjar 2 x BaspaHEP(IPP) 3x KarchamWangtoo(IPP) 4x Vishnuprayag(IPP) 4x Run-of-river scheme 5 MalanaHEP(IPP) 2x AllainDuhangan(Pvt) 2x Rosa 4x BarkheraTPS(IPP) 2x KhambarkheraTPS(IPP) 2x KundariTPS(IPP) 2x MaqsoodpurTPS(IPP) 2x UtraulaTPS(IPP) 2x Anpara -C 2x

66 Line Reactor Sl No Lines kV Transmission line A. NR-1 List of Line Reactor can be used as Bus Rector: To be confirmed by Constituents Ckt ID End-1 MVAr Rating at End-1 Switchable (with additional CB) Provision to use as Bus Reactor (position of line isolator) Reactor installed at Confirmation by Utility for usage as Bus reactor End-2 MVAr Rating at End-2 Switchable (with additional CB) Provision to use as Bus Reactor (position of line isolator) 1 Bhiwani-Meerut 1 Bhiwani(PG) 3*80 YES YES --- Meerut Confirmation by Utility for usage as Bus reactor 2 Bhiwani-Phagi 1 Bhiwani(PG) 3* YES Phagi 3*80 YES YES YES 3 Bhiwani-Phagi 2 Bhiwani(PG) 3* YES Phagi 3*80 YES YES YES 4 Merrut-Moga 1 Merrut 3*80 YES YES --- Moga 3*80 YES YES Phagi-Gwalior 1 Phagi 3* YES --- Gwalior 3*80 YES YES Phagi-Gwalior 2 Phagi 3* YES --- Gwalior 3*80 YES YES --- B. NR-2 1 Moga-Bhiwani 1 Moga 3*80 YES YES --- Bhiwani C. NR-3 1 Agra-Fatehpur 1 Agra 3* YES YES Fatehpur 3*110 YES YES Balia-Gaya 1 Balia 3*80 YES YES --- Gaya Balia-Lucknow 1 Balia 3*80 YES YES --- Lucknow 3*80 YES YES YES Remarks NGR bypassing yet to be done & Line yet to be charged Line ownership of POWERGRID Jumper connection at the time of line shutdown Jumper connection at the time of line shutdown Jumper connection at the time of line shutdown Annexure-I 4 Fatehpur-Sasaram 1 Fatehpur 3* YES --- Sasaram Kanpur GIS - Jhatikara 1 Kanpur GIS 3*110 YES YES --- Jhatikara 3* YES Lucknow-Bareilly 1 Lucknow 3*80 YES YES --- Bareilly 3* Varanasi-Balia 1 Varanasi 3* YES --- Balia Varanasi-Gaya 1 Varanasi 3* YES --- Gaya 3* New Line Jumper connection at the time of line shutdown

67 Sl No Lines Ckt ID End-1 MVAr Rating at End-1 Switchable (with additional CB) Provision to use as Bus Reactor (position of line isolator) Reactor installed at Confirmation by Utility for usage as Bus reactor End-2 MVAr Rating at End-2 Switchable (with additional CB) Provision to use as Bus Reactor (position of line isolator) Confirmation by Utility for usage as Bus reactor Remarks Annexure-I 9 Varanasi-Gaya 2 Varanasi 3* YES --- Gaya Varanasi-Kanpur GIS 1 Varanasi 3*80 YES YES --- Kanpur GIS 3* YES Varanasi-Kanpur GIS 2 Varanasi 3*80 YES YES --- Kanpur GIS 3* YES --- D. UPPTCL 1 AnparaC-Unnao 1 Anpara-C 3*110 YES YES --- Unnao 3*110 YES YES Anpara D-Unnao 1 Anpara 3* YES Unnao 3 G.Noida-Mainpuri 1 G. Noida 3* YES --- Mainpuri 765kV Fatehpur-Sasaram- Gaya LILOed at Varanasi and 330MVAR Mid point reactor at Sasaram shifted to Bus Reactor at Varanasi G. Noida end line reactor is being used as bus reactor at G. Noida 4 Fatehabad-Lalitpur 1 Fatehabad 3* YES Lalitpur 3* YES 5 Fatehabad-Lalitpur 2 Fatehabad 3* YES Lalitpur 3* YES Line yet to be charged E. Rajasthan 1 Anta-Phagi 1 Anta 3*80 YES YES --- Phagi 3*80 YES YES Anta-Phagi 2 Anta 3*80 YES YES --- Phagi 3*80 YES YES kV Transmission line charged at 400kV A. NR-2 1 Kishenpur-Moga 1 Kishenpur YES --- Moga YES kV Transmission line A. NR-1 1 Dadri-Kaithal 1 Dadri Kaithal YES

68 Sl No Lines Ckt ID End-1 MVAr Rating at End-1 Switchable (with additional CB) Provision to use as Bus Reactor (position of line isolator) Reactor installed at Confirmation by Utility for usage as Bus reactor End-2 MVAr Rating at End-2 Switchable (with additional CB) Provision to use as Bus Reactor (position of line isolator) Confirmation by Utility for usage as Bus reactor B. NR-2 1 Dadri-Malerkotla 1 Dadri Malerkotla YES Fatehabad-Moga 1 Fatehabad YES --- Moga Hissar-Moga 2 Hissar Moga YES Jalandhar-Chamba (GIS) 1 Jalandhar 50 YES YES --- Chamba GIS Jalandhar-Chamba (GIS) 2 Jalandhar 50 YES YES --- Chamba GIS Nakodar-Kurukshetra 1 Nakodar YES --- Kurukshetra Nathpa Jhakri-Panchkula 1 Nathpa Jhakri Panchkula 50 YES YES New Wanpoh-Wagoora 1 New Wanpoh Wagoora YES New Wanpoh-Wagoora 2 New Wanpoh Wagoora YES --- C. NR-3 1 Varanasi- Biharshariff 1 Varanasi YES --- Biharshariff Varanasi- Biharshariff 2 Varanasi YES --- Biharshariff D. BBMB 1 Panchkula(PG)-Panipat 1 Panchkula(PG) Panipat YES Damaged E. Rajasthan 1 Bikaner-Bhadla 1 Bikaner Bhadla YES 2 Bikaner-Bhadla 2 Bikaner Bhadla YES Remarks NGR bypass isolator supply expected to be completed by Jan'17. NGR bypass isolator supply expected to be completed by Feb'17. Biharshariff end is in Eastern Region Biharshariff end is in Eastern Region Annexure-I

69 Annexure 1(b) Voltage reduced by 5kV LR utilised as BR at Jhatikara Voltage reduced by 13kV LR not utilised as BR at Kanpur LR1 at Fatehpur end not utilised LR2 at Agra end not utilised LR2 at Fatehpur end not utilised Agra Fatehpur 1 out of service Agra Fatehpur 2 out of service

70 Line MW Jaipur end LR1 out Jaipur end LR2 out Agra end LR1 out Agra Jaipur 1 out Agra Jaipur 2 out Line out of service LR at Jalandhar out of service

71 LR at both ends in service as BR Line out of service LR 2 out of service Ckt 1 out of service LR 1 out of service Ckt 2 out of service LR #2 SCADA not showing ability to use it as BR

72 Ckt 1 out of service LR of ckt1 out of service

73 Data not correct Annexure-2

74 Capability curve plots for Talwandi Saboo generating units for November 2017

75 Voltage v/s MVAR p lots provided by NTPC Dadri Thermal MVAR v/s Voltage For the month: November 2017

76 Annexure-2 Voltage v/s MVAR plots provided by Punjab to t for Talwandi Saboo TPD

77 Annexure II(a)

78 Annexure-III Bahadurgarh Bhinmal Auraiya Fatehabad (PG)

79 Hissar Jaipur south Tap changed from 9b to 11 Jalandhar Kanpur

80 Kankroli Ludhiana Kishenpur Dhuri

81 Moga Bamnoli Patiala Bawana

82 Mundka Nakodar Dhanonda Jodhpur

83 Suratgarh TPS Kota Heerapura Sikar

84 Rosa

85 High Voltage Nodes in NR Annexure -IV BBMB Bhiwani Nuhiyawali BBMB Dehar Agra (PG) Harshvihar Kabulpur

86 Khedar (RGTPS) Amritsar Abdullapur Bhiwadi (PG) Parbati Pool (Banala) Bhiwani (PG)

87 Fatehpur (PG) Jhajjar Jalandhar Jhatikara Koldam Karcham Wangtoo

88 Mainpuri (PG) Mahindergarh Mandola Nallagarh Maharanibagh Neemrana

89 Naptha Jhakri Sikar Panchkula Rampur Parbati 3 Sonepat

90 Dhuri Rajpura Makhu Talwandi Saboo Nakodar Parichha

91 Akal Suratgarh TPS Muzaffarnagar Lucknow (UP) Jodhpur