भारत सरकार Government of India वद्यु मंत्र् Ministry of Power ...

1

भारत सरकार Government of India

�वद्यु मंत्र् Ministry of Power

उ�र क्षे� िव�ुत सिमित Northern Regional Power Committee

No. उ. क्. िव. स./�चालन/106/01/2017/ 7715-55 �दनांक: 11.7.2017 सव्ा म� : �चालन समनव� उपसिमित क् सदस� । To: Members of OCC िवष�: �चालन समनव� उपसिमित क� 137 व� बैठक का का�रससचे। Subject: Agenda of 137th OCC meeting.

�चालन समनव� उप-सिमित क� 137व� बैठक 18.07.2017को 10:30 बज ् स ्उ.क.्िव.स.सिचवाल�, नई �दलले म� आ�ोिजत क� जाएगे । उ� बैठक क� का�रससच ेउ�र क्षे� िव�ुत सिमित क� व्बसाइट http://www.nrpc.gov.in पर उपलब् ह ै।

137th meeting of the Operation Co-ordination sub-committee will be held on 18.07.2017, 10:30am at NRPC Secretariat, New Delhi. The agenda of this meeting has been up-loaded on the NRPC’s web-site http://www.nrpc.gov.in.

Members are requested to kindly intimate for any discrepancy /missing agenda points .They are requested to go through the related Agenda points and keep the status ready for discussion in the meeting.

-sd अि्शाषे अिभ�ंता( �चालन)

18-ए, शहेद जेत �सह मागर, कटवा�र�ा सरा�, नई �दलले- 110016 फोन:011-26967842 फ्कस: 011-26865206 ई-म्ल: [email protected] व्बसाईट: www.nrpc.gov.in 18-A, Shaheed Jeet Singh Marg, Katwaria Sarai, New Delhi-110016 Phone: 011-26967842 Fax: 011-26865206 e- mail: [email protected] Website:

www.nrpc.gov.in

2

1. Confirmation of Minutes:

Agenda for the 137thMeeting of the Operation Coordination Sub-Committee (OCC) of NRPC

Date & time: 18.07.2017at 10.30 hrs. Venue: NRPC Secretariat, New Delhi.

The Minutes of the 136th OCC meeting held on 14.6.2017and16.6.2017 at New Delhi were issued vide letter of even number dated30.06.2017.

Comments from NTPC have been received as under:

Agenda Point No 38 (Frequent Forced Outage of Transmission Elements), in respect of outage of Dadri-Panipat-2 line at Sr.No.11 of the agenda, NTPC informed that DT (Direct Trip) command is being received from Panipat end without any switching operation of the line leading to frequent trips. NRPC directed PGCIL NR-II and BBMB to look into the matter for corrective action immediately.

The sub-committee may discuss and confirm the Minutes.

2. Maintenance Programme of Generating Units and Transmission Lines:

2.1. Maintenance Programme for Generating Units.

The proposed maintenance programme for Generating Units for the month of August, 2017 will be discussed on 17.7.2017 at NRPC office, New Delhi.

2.2. Outage Programme for Transmission Elements.

The proposed Outage programme of NLDC & NRLDC oversight transmission elements for the month of August, 2017 will be discussed on 17.7.2017 at NRPC office, New Delhi.

3. Planning of Grid Operation for August 2017:

3.1 Anticipated Power Supply Position in Northern Region during August, 2017(As per LGBR 2017-18) is as under:

August, 2017

State

Anticipated Peak Demand

Expected Peak

Availability

Surplus (+)/ Deficit (-)

Anticipated Energy Requirem

ent

Expected Energy

Availability

Surplus (+)/ Deficit (-)

(MW) (MW) (MW) % (MU/day) (MU/day) (MU/day) % Chandigarh 370 361 -9 -2.4 5.67 5.67 0.00 -0.07 Delhi 6000 6280 280 4.7 110.61 123.54 12.93 11.69 Haryana 9890 8849 -1041 -10.5 174.98 182.53 7.55 4.31 H.P. 1430 2124 694 48.5 27.30 47.68 20.38 74.65 J&K 2410 2198 -212 -8.8 43.98 38.35 -5.64 -12.81 Punjab 12060 11502 -558 -4.6 217.05 218.08 1.03 0.48 Rajasthan 10180 11027 847 8.3 168.37 193.47 25.10 14.91 U.P. 16830 17866 1036 6.2 322.50 391.79 69.29 21.49 Uttarakhand 2070 2070 0 0.0 41.39 41.14 -0.25 -0.60 Region 56800 60600 3800 6.7 1111.85 1242.25 130.40 11.73

SLDCs are requested to inform their updated estimate of power supply position for August, 2017 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.

3

3.2 Anticipated vis-à-vis Actual Power Supply Position (Provisional) for June,

2017. Anticipated Power Supply Position v/s Actual (Provisional) Power Supply Position of Northern Region during the month of June, 2017 is as given below:

State Req/ Avl

Anticipated Actual %age Variation

Anticipated Actual %age Variation (MU/day) (MW)

Delhi Req 121.01 112.01 -7.44 6400 6553 2.39 Avl 128.66 111.91 -13.02 6492 6526 0.52

Haryana Req 166.20 152.45 -8.27 9340 8912 -4.58 Avl 175.10 152.45 -12.93 8880 8912 0.36

H.P. Req 27.10 25.14 -7.25 1410 1377 -2.34 Avl 43.53 25.09 -42.36 2177 1377 -36.75

Punjab Req 210.08 182.46 -13.15 11600 10786 -7.02 Avl 214.08 182.46 -14.77 11136 10786 -3.14

Rajasthan Req 212.87 185.28 -12.96 10610 10347 -2.48 Avl 216.29 185.05 -14.45 10972 10347 -5.70

U.P. Req 360.20 365.83 1.56 17220 18061 4.88 Avl 391.72 365.83 -6.61 17821 18061 1.35

Uttarakhand Req 41.40 39.76 -3.97 2050 2027 -1.12 Avl 40.57 39.74 -2.03 1973 2027 2.74

As per above, it has been observed that there are much variations (i.e. > 5.0%) in the Anticipated vis-à-vis Actual Power Supply Position (Provisional) for the month of June, 2017 in terms of Energy requirement for Delhi, Haryana, HP, Punjab & Rajasthan and in terms of Peak demand for Punjab.

These states are requested to submit reasons for such variations in writing so that the same can be deliberated in the meeting.

3.3 Power Supply Position:

The provisional Power Supply Position and Notified Power Cuts for the month of June, 2017 are available on CEA website. All SLDCs are requested to furnish the provisional and final power supply position in prescribed formats by 2nd and 15th day of the month respectively in compliance to the provision 5.3 of IEGC

4. 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 June , 2017 is placed on NRPC website.

Members are requested to update the status on regular basis .

5. The updated status of the grant sanctioned from PSDF for the schemes in Northern Region is enclosed at ANNEXURE-I .The status of implementation of the above

Monitoring of schemes funded from PSDF(Agenda by NPC)

4

schemes (physical as well as financial progress) may please be reviewed and the entities may be requested to expedite implementation of the schemes. The entities were requested in the 136th OCC meeting to furnish information in the prescribed format by first week of every month on regular basis to Member Convener, PSDF Project Monitoring Group (AGM, NLDC, POSOCO) with a copy to NPC Division. The updated information stands received from DTL All other utilities may update.

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

Members may submit the updated information.

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

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

All utilities are requested to submit details of substations at 220 KV and above level, likely to be commissioned within next 6 months in the prescribed format in the in the OCC meeting .The available status stands updated on the NRPC website.

The latest available status of the sub-stations to be commissioned by POWERGRID NR 1, 2 &3 stands uploaded on the NRPC website. Also at Annexure II the details of the substations of Power grid regarding the availability of downstream networks as discussed in the Agenda No B7 of the 35th TCC and 39th NRPC is enclosed with

All the concerned States are requested to specifically update the downstream network of the Power Grid upcoming Assets.

8. Cleaning and Replacement of porcelain insulators:

The updated status is available on NRPC website. Other utilities were again requested to submit the detailed status of Replacement of Porcelain Insulators in respect of OUTAGES TAKEN FOR THE INSULATOR REPLACEMENT WORK DURING RECENT MONTHS.

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

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

9.1 Healthiness of defense mechanism: Self- certification

i. It was decided in the 27th meeting of NRPC held on 30th November, 2012 that all STUs would ensure load relief as per target and settings of UFR and df/dt relays. Mock exercise for healthiness of UFRs was to be carried out by utilities

5

themselves on quarterly basis and report was to be submitted to NRPC Secretariat and NRLDC. Further, it was decided in the 31st meeting of NRPC held on 24.7.2014 that the quarterly test report of UFR and df/dt would be uploaded on the website of respective SLDC.

In the last three OCC meetings all utilities were advised to certify specifically, in the report that would be submitted for the next quarter, that “All the UFRs are checked and found functional”. Any discrepancy should be detailed upon and the time line for rectification of the same should also be intimated.

Report of the UFR testing for quarter ending June 2017 has been received from BBMB all the other utilities may update.

ii. In earlier meetings, BBMB had informed that replacement of static relays into numerical relays at 7 sub-stations (2sub-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 the 134th OCC meeting, had intimated that the LOA for procurement of 22 UFR relays has been placed.

In the 136th OCC meeting, representative of HVPNL informed that by 31.07.2017 relays will be replaced. Representative of PSTCL informed that the relays have been replaced and there were some issues pending regarding the setting which was being sorted out after consulting BBMB.

PSTCL & HVPNL to update

iii. In the 136th OCC meeting it was requested to all utilities that as the testing of

UFRs is in process by the NRPC secretariat, they may update any change in the name of officers listed for UFR testing on account of change in posting. Information from NRLC and RVPN stands received All other utilities may update.

iv. In the testing of UFR carried out in the month of June at the substations of PITCUL it w as observed that at the substations no record for quarterly mock testing has been maintained. Also the separate register for maintaining the record of actual tripping through UFR was available. PITCUL to take note and all other utilities may also ensure that the above detailed records are available on the substations where UFR are installed.

9.2 Strengthening of Intra-State transmission system

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

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

In the 132nd OCC meeting, it was noted that all utilities had submitted the report ending December 2016. All the members were requested to submit the information regarding the action taken/action plan of the STU on the feedback

6

given by respective SLDCs. The desired information stands received from UPPTCL, PITCUL, HPSEB, PSTCL, RVPN.

DTL, HVPNL to update the status specifically regarding the action taken/action plan of the STU on the feedback given by the SLDCs.

In the 136th OCC meeting, it was advised to all the SLDCs to submit the next half yearly feedback ending June 2017 with more details in line with the feedback given by NRLDC in the various OCC Meetings.

All utilities are requested to submit the information

9.3 Installation of adequate static and dynamic reactive power compensators.

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

S.No.

SUBSTATION MVAR Implementation by

Updated Status in 136th OCC

1 HINDAUN 125 RVPNL Expected by 31.08.2017.

2 MANESAR 125 POWERGRID Expected by 31.08.2017 3 MERTA 125 RVPNL Expected by 31.08.2017

POWERGRID & RVPNL may update the status

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

The proposal for installation of bus reactors at 12 nos. 400 kV and 17 nos. 220 kV sub-stations was discussed in the 29th meeting of NRPC held on 13thSeptember 2013. After deliberations, NRPC had approved installation of reactors at 400 kV sub-stations of POWERGRID and RVPNL. As regards 220kV bus reactors, POWERGRID had stated that the requirement would be firmed up in consultation with the States. Subsequently, POWERGRID, vide email dated 30.09.2016 had submitted report of the study. In this report, reactors at 13 locations at 220 kV levels and at 24 locations at 400 kV level had been proposed. The report was discussed in 34th TCC/38th NRPC meeting held on 24th /25th October, 2016 wherein Delhi had requested to review the system study for its system. POWERGRID agreed for the same. Subject to review of requirement for Delhi, NRPC approved the report. In the 135th OCC meeting, representative of Delhi informed that the report would be finalized shortly. It was also informed that as per decision in 35th TCC/39th NRPC meeting held on 1-2.05.2017 the report of the POWERGRID and the study by RVPNL to be referred to the Standing Committee on Power System Planning of NR. OCC advised Power Grid and RVPNL to take action in this regard. In the 136th OCC meeting representative of RVPNL informed that both the reports have been taken up in the Standing Committee meeting and the minutes of the same is awaited for further action. RVPNL May Update.

7

Representative of DTL informed in 136th OCC meeting that as per the second study conducted by POWERGRID the requirement of reactor for DTL has increased significantly which may not be in line with the actual requirement. Therefore, it was informed to OCC that DTL will again be conducting the study determining the requirement of the reactors. DTL may inform about the study conducted. All utilities are requested to submit the action plan regarding implementation of the reactive compensation as proposed in the study at the earliest.

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

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

It was discussed in the 135th OCC meeting that the approval of NRPC has been given in its 39th meeting of NRPC held ON 2.5.2017 to the proposal given

Review of SPS for 765 kV Agra-Gwalior line

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

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

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

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

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

In 133rd OCC meeting, POWERGRID representative stated that tendering activities were in process. The POWERGRID representative submitted that as the tendering process takes time, the implementation would be done till August/September 2017. NRLDC representative stated that all out efforts should be made to complete the work before Paddy season, as per earlier schedule of implementation.

8

in the 129th OCC meeting by POWERGRID for booking the cost of revised SPS including 05 years AMC in some other on-going project/work.

It was however stressed that In view of the criticality of 765 kV Agra-Gwalior line for NR, POWERGRID may commission the scheme as per the agreed schedule. POWERGRID had intimated that scheme would be commissioned by October, 2017.

POWERGRID may update the status

In the 135th OCC meeting, concern was expressed about no progress made by the state utilities so far regarding mapping of feeders, identified for the SPS load relief, in SCADA. OCC advised all concerned utilities in the meeting to take action in this regard at the earliest and inform the action taken.

In the 136th OCC meeting it was informed that mapping of feeders, identified for SPS load in SCADA has been implemented by HVPNL and partly by Rajasthan. Other utilities were requested to implement the same at the earliest.

Utilities may update the status of implementation.

POWERGRID representative stated that in view of recent multiple tripping at Agra Sub Station, the Mock Testing of SPS for 765 kV Agra-Gwalior line is required. After deliberation it was decided that the same may be done on 1.6.2017 from 7:00 to 11:00.

In the 136th meeting it was informed that the testing was successfully performed. It was further reported that some modifications have been done in the logic. It was advised by the OCC to submit the report of the testing and the changed logic to the NRPC sect.

POWERGRID may submit the report along with the changed logic to the NRPC Secretariat.

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

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

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

In 34th TCC/38th NRPC meeting held on 24th /25th October, 2016 UPPTCL informed that LOA would be placed on 25.10.2016 and scheme would be implemented in 03 months thereafter.In the 135th OCC meeting, it was informed by the representative of UPPTCL that the implementation of the scheme has started and would be done by 15.6.2017.

In the 136th OCC meeting, it was informed that implementation of the scheme will be done by 10.07.2017.

UPPTCL may update the status.

9

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

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

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

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

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

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

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

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

In the 135th OCC meeting, RVPNL representative intimated that the issue was being discussed with the Generation Company.

As per the letter received from CE PP&D RRVPNL a meeting was held on 24.5.2017 in light of the issue under discussion in the 135th OCC meeting regarding the revision in existing SPS scheme for Kawai , Kalisindh & Chabbra complex due to addition of Chhabbra SCTPS Unit 5.In the meeting representatives of the four generating companies opined that technically it is not possible to reduce the generation up to 60%They insisted that backing down may not be reduced beyond 65% because it may result in stability issues. After deliberation it was decided that 65% backing down of generation may be considered for SPS at Kawai KALISANDH Chhabra & Chabbra Super Critical

10

Complex. Till the new scheme is implemented the existing approved scheme will stay in operation

During the deliberation in the 136th OCC, members were of the view that this complex being very important for the power supply of Rajasthan, the recent incident of complete generation loss of the complex needs to be avoided. Keeping in view the importance of the complex, the members advised Rajasthan to go forward with their proposed backing down for the time being. However, it was cited in the meeting that as per new regulations being prepared by CERC the generators will be required to back down their generation up to 55%.

Rajasthan may update the status.

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

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

In 133rd OCC meeting it was apprised that data for 2017-18 had been received from all the utilities and the same was already sent to CPRI CPRI has submitted the report for 2017-18 and same is available on NRPC website (www.nrpc.gov.in). In the 135th OCC meeting it was intimated that the proposal of installation of capacitor by Haryana, Punjab, Uttar Pradesh and J&K for funding through PSDF was approved in the 35th TCC/39th NRPC meeting held on 1st & 2nd May, 2017 as per recommendation of OCC.

The NPRC recommendation stands referred to the Convener, Techno Economic Sub Group & Consultant –NLDC for PSDF Funding. Utilities noted the information.

In the 136th OCC meeting utilities were requested to submit the comments if any to the proposed capacitor requirement in the report by CPRI. Only Rajasthan has submitted the comments. It was further informed that if the recommendations are acceptable to the utilities, the action plan for implementing the same needs to be submitted.

Utilities are requested to submit their comments and the action plan.

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

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

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

11

The issue is being discussed regularly in OCC meetings.

In the 133rd OCC meeting POWERGRID updated that the work would be completed by April, 17.

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

In the 135th 136th meetings, joint report of NRLDC & POWERGRID were submitted

OCC had advised all the transmission and generation Utilities to co-operate with the vendor to resolve the issues regarding ORU removal for manual downloading of data from SEMs.

POWERGRID& NRLDC may update the status.

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

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

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

The latest status as updated by the members in 136th meeting is as under:

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

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

UPPTCL:-Order for 02 nos. of ERS has been placed.1 No. has been received & the other is expected to be received by end June

RRVPNL:-Proposal pending with management.

HVPNL:-In place of ERS, spare towers would be procured worth Rs Two Crore. PO issued in this regard

PTCUL- NIT placed. Supply expected in 3 month.

HPSEBL –No progress

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

12

J&K- Order has been placed for 2 nos. ERS.

Members may update the status.

14. 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.15.04.2014) shall have the LVRT capability.

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

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

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

13

In the 134th OCC, RVPNL submitted the status of LVRT.As per information received from RVPNL, it was noted that LVRT was not installed in many wind generating stations in Rajasthan.

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

OCC in the 135th meeting advised Rajasthan to take up the issue with wind generators for ensuring compliance of CEA Regulations and CERC orders in this regard

In the 136th OCC meeting representative of Rajasthan informed that the matter is being pursued with the wind generators. OCC was of the view that, with the current focus being shifting towards renewable energy, the security and stability of the grid will require some proactive task to be done by power engineers. In light of the above, the LVRT issue of the wing generators needs to be taken with utmost seriousness and at a fast pace

RVPNL may update the status.

15. Long Outage of generating units and transmission assets.

The list of generating units and transmission assets as updated by NRLDC in the 136th OCC meeting is placed at ANNEXURE-III. All utilities were requested to update the dates of expected revival

16. The Frequent Tripping of 400 kV Sikar-Ratanagrh ckt-2 on Direct Trip received (Agenda by Power Grid with RRVPNL):

Frequent Outage of 400kV Sikar-Ratangarh Ckt-2 line is observed on account of direct rip received without any line fault.

S. No.

ELEMENT NAME OUTAGE RESTORATION

DURATION

1 400KV SIKAR-RATANGARH-II

08-01-17 04:00

08-01-17 06:13 02:13

2 400KV SIKAR-RATANGARH-II

15-01-17 07:54

15-01-17 09:15 01:21

3 400KV SIKAR-RATANGARH-II

05-06-17 10:50

05-06-17 11:07 00:17

4 400KV SIKAR-RATANGARH-II

21-06-17 11:00

21-06-17 16:35 05:35

5 400KV SIKAR-RATANGARH-II

01-07-17 10:53

01-07-17 11:30 00:37

While analyzing the tripping in above case, there was no line fault, however it is observed that in all above case, 50MVAr Bus Reactor (Owned by RVPNL) also tripped at Ratangarh (RRVPNL) end. 50MVAr Bus Reactor is in same dia with 400KV Sikar-Ratangarh Ckt-II and during any switching operation (switching of any other feeder), current re-distribution in this dia leads to tripping of 50MVAr Bus Reactor which is a mal-operation. Furthermore tripping of 50MVAr Bus Reactor leads to tripping of Sikar-Ratangarh Ckt-II by sending direct trip to Sikar end due to wiring problem at Ratangarh end.Members may discuss.

14

17 Technical Minimum Schedule for Dadri-Coal (Agenda by NTPC) :

NTPC Dadri Station is not being provided Technical Minimum Schedules of 55% in line with the provisos of IEGC 4th Amendment. The problem is more predominant in Dadri-Coal Stage-1 units where only Delhi and UP have power allocation of 90% and 10% respectively. NTPC is adhering to NRLDC instructions for closing down or bringing up the unit(s) as per grid requirement. However, once unit is brought on-bar, technical minimum of 55% is not being ensured. With the result, NCR RCC shift executive constantly gets engaged in perusing the matter with SCE NRLDC for getting the schedule corrected and in the process, couple of blocks is missed out with lower than Technical Minimum schedules. NRLDC control room often cites software related problems regarding the issue. At times, conflict of opinion regarding stopping/starting of units between Delhi SLDC and NRLDC is also being observed. NTPC reiterates that since Dadri-Coal is ISGS station, unit(s) will be started/stopped only on instructions from / channelized through NRLDC. NRLDC is requested to ensure technical minimum schedules as per units on-bar without requiring the matter to be perused time and again.

Members to deliberate 18 RGMO/FGMO compliance by generators in the region ( Agenda based

on letter by CERC) Central Electricity Regulatory Commission (IEGC) Regulation, 2010 at 5.2(f) provides that generators should provide RGMO/FGMO response. Further vide 5th amendment to IEGC dated 12.04.2017, it has been provided at Regulation 5.2(h) that ‘RLDCs/SLDCs should not schedule the generating station or unit(s) thereof beyond ex-bus generation corresponding to 100% of the installed capacity of the generating station or unit(s) thereof and that the generating station shall not resort to Valve Wide Open operation of units” so that primary response is ensured. CERC in its letter dated 05.06.2017 has directed to obtain the status of availability of RGMO/FGMO response from the generators (ISGS as well as intra-state generators) in the region. In the 136th OCC Meeting all utilities were requested to submit the status of actual response being provided by generators under the primary response may also be provided by the generators and SLDCs by 15.7.2017. Members may update

19. Availability of HVDC Biswanath –Alipurduar –Agra in the interest of grid

security

With the likely onset of monsoon, the hydro generation in Sikkim, Bhutan and North Eastern Region has picked up leading to high line loadings. Recently, few hydro generators namely Teesta III (1200 MW), Dikchu (96 MW), Jorethang (96 MW) have been commissioned and Tashiding (97 MW) is

15

likely to be commissioned shortly. The construction of 400kV Rangpo- Kishenganj D/C which was planned for evacuation of these generators has got delayed. As a result , the surplus generation is getting pooled at Binaguri and further evacuated to Northern region (NR) via Eastern Region (ER) through 400kV Binaguri – Purnea D/C,400kV Binaguri- Kishanganj D/C,400 kV Purnea-Muzaffarpur – Gorakhpur D/C and other inter regional lines between NR and ER. Also kV Patna – Kishanganj D/C and 400kV Purnea – Biharshariff D/C lines (which also falls in this corridor and are under outage since July-Aug 2016 due to tower collapse), have not been revived till date.

Under this scenario, HVDC BNC- Agra bi pole availability is extremely important as power flow from BNC to Agra reduces the flow on chicken neck axis as well as impacts transfer to NR. Outage of HVDC BNC- Agra bi pole, either planned or unplanned would further stress the system. On the 20th June 2017 when BNC- Agra bi pole was under planned outage, around 3000 MW power flow on chicken neck axis placed the grid in a critical situation. Based on the past record, outage of double circuit on chicken neck axis is a credible contingency which may lead to collapse of North Bengal, Sikkim, Bhutan and North Eastern Region. Further, the power flow on chicken neck axis and beyond towards NR is expected to be 4000MW and above in coming days .Under these circumstances, the availability of HVDC BNC- Agra,400kV Binaguri- Purnea D/C ,400kV Binaguri – Kishanganj – Purnea D/C and 400kV Purnea- Muzaffarpur D/C along with Fixed Series Compensation (FSC) needs to be ensured till the end of September 2017. Planned outages, needs to be planned after September and line patrolling may be undertaken thoroughly to avoid any forced outage.400kV Kishenganj – Patna D/C lines also needs to be restored on priority. Further, any testing of HVDC BNC-ALPD- Agra should be planned after September 2017 as the same would impact availability of BNC-Agra HVDC Bi pole & impact grid security as well as water spillage.

Member may deliberate and Power Grid to update

20. Evacuation of Paricha TPS and bus split at 400kV G.Noida

A. Evacuation of Paricha TPS:The following elements are under outage:

i. 400kV Paricha – Orai - Mainpuri ii. 400kV Paricha - Mainpuri iii. 220kV Orai (220kV) – Orai - Kanpur

The current generation at Paricha TPS(Uni t#5,#6 in operation at present) is getting evacuated through two no. of 400/220kV,315MVA ICTs. Such operation is non-compliant for N-1 contingency of outage of one ICT. Moreover, the outage of 220kV Orai (220kV) – Orai - Kanpur and commissioning of only single 400kV bus & single 400/220kV ICT at Banda(UP) is further affecting the reliable evacuation of generation at Paricha.

B. Bus split arrangement at G.Noida(UP) is leading to critical loading of lines around Ballabgarh (PG). In addition to above, Delhi ring also weakened.

In view of above issues, the following actions are required:

16

• Expedite the restoration of 400kV paricha – Orai – Mainpuri, 400kV Paricha – Mainpuri,220kV Orai(220kV) – Orai – Kanpur. In case of tower collapse the provision of revival of line on Emergency Restoration System (ERS) to be looked into.

• Expedite the commissioning of upcoming network at 400kV Banda(UP).

• Expedite the commissioning of 400kV Gr.Noida(765kV) – Gr.Noida(400kV) D/C so that the normal bus operation at 400kV G.Noida be restored which would also strengthen the Delhi ring.

• Upgrade the switchgear at 400kV G. Noida (UP) from existing 2000A rating to the level corresponding to quad-conductor line. Further, at other locations also the compatibility of switchgears corresponding to the conductor may be looked into.

Members may discuss and UPPTCL to update

21. Review of Grid Operations for last month (June, 2017):

NRLDC may make presentation. 22. High demand in Northern region:

As expected , anticipated & discussed in previous OCC meetings and other fora, Northern Region is meeting highest ever demand for now a days due to weather beating loads as well as agricultural demand. The demand met has crossed 55 GW and 1200 MU a day consumption barrier. In view of high demand scenario, it is very important that system security be maintained during high demand period from June to September.

NRLDC has been raising various system security issues and actions for its enhancement & to improve the reliability during various discussions and meetings. Following are the actions have been emphasized and reiterated below for kind information of stake holders:

1. Alertness at all control centers during the period. 2. Meticulous forecast of demand and renewable generation and plan to meet

this demand without deviation from schedule. 3. Keeping more units on bar to have enough reserves in the system (at least

equivalent to 50% of the largest unit in the system as per Hon’ble CERC orders).

4. Keeping governors of the generating units in frequency responsive mode. 5. Monitoring of Area Control Error (ACE) of respective control areas and

keeping it zero as well as it should cross zero frequently. 6. Reactive power control and usage of reactive power devices including

generators to control system voltages. 7. Keeping system N-1 compliant and proper upkeep of all protective schemes in

the system. 8. Procurement and maintenance of Emergency Restoration System (ERS) by

all transmission utilities.

However, it has been observed that there are regular violations of above principles e.g. very high over drawals for sustained period of time, Non adherence to N-1 security leading to outages of large area, frequent tripping of trunk corridors and long

17

outages of transmission lines on tower collapse etc have been observed and pointed out to the concerned utilities. Most of the major states (Uttar Pradesh, Haryana, Rajasthan, Delhi and Punjab) of Northern Region were over drawing from the grid including smaller state like Uttarakhand, Himachal and J&K.

Therefore, all the users are once again requested to adhere to above suggestions including early revival of lines under long outages for safety and security of the system.

23 Multiple element tripping in Haryana control area:

On 27th June 2017, 00:15 hrs multiple elements tripped in Haryana control area leading to load loss of ~ 1700 MW of Haryana. Tripped element were 400/220kV 3x315 MVA ICTs at Kirori, 400/220 kV 2x315 MVA ICTs at Kaithal apart from number of 220 kV lines/220 kV substations such as Jind, Safidon, Narwana, Hissar, Mund, Bata, Kaithal, Chika and running unit-7 of Panipat TPS. As per preliminary analysis, it emerges that this tripping is a case of cascading outages due to tripping of single element either on protection mis-operation or a protection setting related issue.

On 26th June 2017, at 13:08hrs all 400/220 kV ICTs at Kirori also tripped indicating a load loss of around 1000MW.

Such power supply interruption to large area can also escalate to larger areas and therefore, these need to be addressed immediately.

NRLDC has been raising the concern of high loading of ICTs at Kaithal, Panipat, Gurgaon, Panchkula and Bhiwani (BBMB), frequent tower collapse for 400, 220 and 132 kV transmission lines, lower isolator rating at 400 kV Nawada & Dhanonda and no underlying network at 400kV Jind, Bhiwani and Kurukshetra in its quarterly feedback, monthly OCC meetings as well as run up to this high demand period.

However, it is evident that requisite attention towards N-1 security criteria is need of hour and must be ensured in all operating conditions for safe and secure operation of the grid.

In addition, the outage of 400kV Jhajjar-Dhanonda on 14th June 2017 due to tower collapse has not only reduced the reliability of evacuation of MGTPS but has also weakened vital loop in the 400 kV system further putting constraints in loading of Mundra-Mahendragarh HVDC link during this high demand period of Haryana as well as that of NR. These outage as well as last year’s outages of transmission lines on tower collapse indicate the need for availability of Emergency Restoration System (ERS) apart from tackling design and operation issues of transmission lines.

Therefore, it is utmost necessity to have a detailed analysis of the event (s), taking up issues of planning horizon and issuing strict guidelines for operation of the system keeping N-1 security all the time. A line of confirmation of the actions taken in the form of a detailed report covering all above aspects is requested.

Members may please discuss.

18

24 Multiple element tripping at 765/400kV Agra Fatehbad and Oscillations in the system:

Lalitpur TPS is being evacuating through following interconnection:

• 765kV Lalitpur-Agra Fatehbad Ckt-1 & 2 • 765/400kV Agra Fatehbad ICT-1 & 2 • Five outlet from 400kV agra Fatehbad (400kV Agra Fatehbad-Agra (UP) ckt-1

& 2, 400kV Agra Fatehbad-Mathura, Agra Fatehbad-Agra )PG) & Agra fatehbad-Muradnagar)

• 765/220kV Lalitpur ICT-1 &2 (220kV Lalitpur-Jhansi D/C)

On 24th June 2017, 20:04 hrs, at antecedent condition 400kV Agra(UP)-Fatehabad(UP) ckt-2 was under planned outage , 220kV Lalitpur-Jhansi double circuit was also in open condition and Lalitpur generation was around 1850MW.

Tripping of 400kV Agra(PG)-Fatehabad(UP) ckt-1 and 400kV Mathura(UP)-Fatehabad(UP) ckt leads to lalitpur evacuation through only remaining 400kV Agra Fatehbad-Agra (UP) Ckt-1 & Agra Fatehbad-Muradnagar (radial line). Consequent to this tripping, oscillation were observed for ~ 30 sec in the system.

Incidentally, oscillations have died down in 30 seconds time and no other untoward incident occurred in the system before, Lalitpur TPS reduced its generation based on advice from NRLDC during this high demand period in UP as well as that of NR. However, this may not be case during all the events and therefore, corrective action shall be taken both at planning and operational level including protection related issues. It is understood that UP has put in place some System Protection Scheme (SPS) at Lalitpur for taking care of tripping of 765kV Lalitpur-Fatehabad line (s) though the scheme has neither been put forth in NRPC fora nor has been shared with NRLDC. However, it appears from the event that the SPS if any available at Lalitpur TPS does not take care of depletion of network from Agra Fatehabad onwards.

Therefore, it is requested that this event including previous outages in Lalitpur Parichha complex (where 400 kV Parichha-Orai-Mainpuri D/C lines are under outage since 17th May 2017 due to tower collapse) shall be analyzed in detail and both planning as well as operation safe guards shall be put in place to avoid such incidents in future. A copy of such analysis and action points may please be sent to the NRLDC/NRPC at the earliest.

Members may please discuss.

25 Reliability Issues:

Punjab: Loading of 400/220kV Amritsar, Ludhiana, Malerkotla, Patiala has been observed during high import from Grid. High MVAr drawal at Amritsar is also there and has also been highlighted in previous OCC meeting also. Underlying network of Amritsar, Ludhiana, Dhuri & Jallandhar are also loaded and need attention to take care of any N-1 contingencies in this area.

19

Haryana: Loading of 400/220kV Kaithal, Gurgaon, Dhanoda etc. and 220kV interconnection of Hissar has been observed to N-1 non-compliant. Recently multiple tripping on 26th & 27th June again exposed the reliability of Gurgaon/Kaithal/Kirori interconnections. Underlying network at Jind and Kurukshetra is yet to be come and their commissioning would strengthen the 220kV interconnections of nearby area.

Isolator rating issues at Dhanoda & Nawada, Outage of 400kV Dhanoda – Daulatabad on tower collapse also poses challenges to evacuation of HVDC Mundra-Mahindergarh / CLP Jhajjar.

Rajasthan: Loading of 400/220kV Bhiwadi, Sikar, Akal has been observed. N-1-1 non-compliance of Kawai-Kalisindh-Chhabra complex has been continuously flagged and discussed in regular OCC/TCC meeting. N-1 non-compliance at 765/400kV Phagi ICTs also and third ICTs is still expected.

High voltage at Suratgarh, Akal & Jodhpur area has also been observed and reported continuously.

It has been observed that either telemetry of Suratgarh TPS is not reliable or persistent high voltage in this area.

Uttar Pradesh: 400/220kV ICT loading of Agra(UP), Mainpuri, Meerut, Gorakhpur, Lucknow (PG) etc. Evacuation issue of lalitpur/Paricha & Bara TPS under N-1-1 contingencies. Evacuation issues of Anpara-D/Anpara-C under N-1 contingency of 765kV AnparaC-Unnao.

Low voltage at 400kV Sultanpur, Gorakhpur, Azamgarh & various 220kv nodes has been observed.

Limitation of Isolator rating at 400kV Gr.Noida leading to bus split operation at Gr.Noida. Commissioning of 400kV Gr.Noida-Gr.Noida D/C would help in enhancing the reliability of Gr.Noida load. In view of reliability & security of this area, second ckt of 765kV Bara-Mainpuri, 400kV Mainpuri-Aligarh, 765/400kV Gr.Noida second ICTs must be expedited to take care of N-1-1 contingencies in this complex.

Delhi: 400/220kV ICT loading at Bamnoli. Bus split at Bamnoli leads to asymmetrical loading and thus N-1 non-compliant. N-1 non-compliance at 220kV BTPS-Ballabhgarh D/C. N-1-1 contingency of Dadri-MaharaniBagh & Maharanibagh-Ballabhgarh would affect the 400/220kV MaharanaiBagh load.

Tower collapse of Bamnoli-Jhatikara One ckt and other ckt is on ERS , outage of 400kV Bawana-Mundka D/C affecting the reliability of 400kV Delhi ring.

Uttarakhand: Loading on 400/220 kV Kashipur ICTs is not N-1 compliant in case of high import (Gas generation at interconnection of 220kV Kashipur would relief the loading of Kashipur ICTs)& Loading on 220 kV Roorkee (PG) – Roorkee.

Jammu & Kashmir: N-1 non-compliance of 400/220kV Wagoora ICT, underlying 220kV network of Wagoora, Kishenpur) in Kashmir area.

20

26 Outages of transmission elements on account of inclement weather

In the Northern Region, a number of transmission lines trippings are being observed in the area experiencing bad weather. A few of the recent such outages during inclement weather conditions is shown in following table:

S. No. Line Utility Outage

date Outage Time Weather Reason/Remarks

1 400kV Kurukshetra(PG)-Sonipat 1

PGCIL 13-Jun-17 22:06

Rain, Storm in Haryana

Phase to earth fault Y-Ph

2 400kV Kurukshetra(PG)-Sonipat 2

PGCIL 13-Jun-17 22:06 Phase to earth fault Y-Ph

3 400kV Bahadurgarh-Sonepat 2

PGCIL 13-Jun-17 22:12 Phase to earth fault Y-Ph

4 400kV Dhanonda-Jhajjar CLP-1

HVPNL 14-Jun-17 15:00

Rain, Storm in Haryana

Tower collapsed Tower No. 12 to 17

5 400kV Dhanonda-Jhajjar CLP-2

HVPNL 14-Jun-17 15:00 Tower collapsed Tower No. 12 to 17

6

400kV Daultabad(HVPNL)-Gurgaon(PG) -1

HVPNL 14-Jun-17 15:23 Distance protection operated Details awaited.

7 400kV Daultabad-Dhanonda ckt-1

HVPNL 14-Jun-17 15:26 Phase to earth fault. Y-ph

8 400kV Uri II(NHPC)-Wagoora(PG)

PGCIL 9-Jul-17 17:16 Rain, Storm in Kashmir Valley

Y-N, 92.99 KM from Wagoora end. Current 2.3 KA.

9 400kV Uri II(NHPC)-Uri(NHPC)

PGCIL 9-Jul-17 17:16 Line tripped alongwith tripping of 400kV Wagoora-Uri(II) line (during heavy storm & rainy weather).

During such bad weather condition wherein the system is already under stress, the outage of multiple elements in same area further reduces the reliability/security of the system.

Constituents shall investigate such outages in the same area during such inclement weather conditions and provide the report along with the remedial actions taken to minimize the outages.

Member may discuss.

27 Complete station outage of 765/400kV Balia and 400/132kV Mau (UP)

An incident of complete station outage at 765/400kV Balia (PG) and 400/132kV Mau (UP) occurred at 08:41hrs on 09-July-2017. It resulted into load loss in Mau area. Due to tripping of all 400kV connected lines of Balia, power flow on HVDC Balia-Bhiwadi became zero, which would have resulted into SPS operation. As per preliminary information, bus bar protection was under outage at 400kV Balia (PG) station.

21

Fig. PMU plot of voltage at Agra& Kanpur at 08:41hrs

Fig. PMU plot of voltage of Balia at 08:41hrs

22

Fig. PMU plot of Frequency and df/dt

Preliminary report issued by NRLDC is attached as Annexure-IV.

Major issues:

Fig. PMU plot of current of Balia at 08:41hrs

• Delayed clearance of fault and non compliance of CEA Grid Standard 3.1.e and CEA Transmission Planning Criteria

• Operational issues during planned shutdown of transmission line, which caused bus fault.

23

• Operational Practices and periodicity of healthiness checking for Protection system.

• At 08:29hrs, non-operation of pole discrepancy for Balia-Patna ckt-4 ckt at Balia end to be checked.

• At 08:41hrs, non-operation of bus bar protection/Zone-4 in case of bus fault at Balia (PG) to be checked.

• ±500kV HVDC Balia-Bhiwadi SPS operation details to be provided. Generation backing down details from Rihand, Singrauli and Kahalgaon needs to be forwarded.

• Reason of tripping of 400kV Anapara-Mau line immediately during fault (Protection over reach).

• Reason of non-tripping of 400kV Balia-Mau ckt-1 & 2 from Mau end. • Reason of tripping of 400kV Azamgarh-Mau ckt from Azamgarh end. • Frequent bus fault occurred during planned outage of transmission line. This

issue needs to be looked into. Utilities may kindly share the details and discuss

28 Complete 400kV and above station outage in Northern Region from Apr 2017 onward:

Complete station outage of 400kV and above station was continuously mentioned in operational feedback of Northern Region by NRLDC. List of the complete station outage from April onward is tabulated below:

S. No. Name of the station Most affected station

(Apr-Jun'17) Date

1 765/400kV Balia (PG) 1 (All complete station outage) 9th July 2017

2 765/220kV Lalitpur TPS 2 (All complete station outage)

29th May 2017 and 21st June 2017

3 765kV Anta (RRVPNL) 1 (All complete station outage) 20th May 2017

4 765kV Phagi (RRVPNL) 1 (All complete station outage) 20th May 2017

5 765/400/220kV Agra (PG) 1 (All complete station outage) 12th Apr 2017

6 400kV Rihand (NTPC) 1 (All complete station outage) 18th May 2017

7 400kV Chhabra TPS (RRVUNL)

1 (All complete station outage) 20th May 2017

8 400kV Kawai TPS (APL) 1 (All complete station outage) 20th May 2017

9 400kV Kalisindh TPS (RRVUNL)

1 (All complete station outage) 20th May 2017

10 400/220kV Ratangarh (RRVPNL)

1 (All complete station outage) 29th May 2017

11 400/220kV Banda (UP) 1 (All complete station outage) 14th May 2017

12 400/220kV Dehar (BBMB) 1 (All complete station outage) 21st Apr 2017

13 400kV Bawana (DTL) 1 (All complete station outage) 21st May 2017

14 400kV Jodhpur (RRVPNL) 1 (All complete station outage) 01st Apr 2017

15 400/132kV Mau (UP) 1 (All complete station outage) 9th July 2017

24

Utilities may kindly look into the issue and share the corrective actions already taken or to be taken along with time frame.

29 Frequent forced outages of transmission elements

The following transmission elements were under frequent forced outages during the month of Jun’17:

S.No. Transmission line No. of forced

outages

Utility

1 800kV HVDC Champa(WR) - Kurukshetra(NR) Pole -1 11 POWERGRID

2 400kV Agra(PG)-Bassi(PG) ckt-1 5 POWERGRID 3 400kV Allahabad(Rewa Road)(UP)–

Banda(UP) ckt-2 5 UPPTCL

4 400kV Daultabad(HVPNL)-Dhanonda(HVPNL) ckt-1 4 HVPNL

5 400kV Fatehabad(UP)-Mathura(UP) ckt-1 4 UPPTCL 6 400kV Dhuri-Rajpura ckt-2 3 PSTCL 7 400kV Fatehabad(UP)-Muradnagar New(UP) 3 UPPTCL 8 400kV RAPS C(NPC)-Shujalpur(PG) ckt-1 3 RAPPTCL 9 Vindhyachal(PG) HVDC BtB Block 1 3 POWERGRID

The complete details are attached at Annexure-V. It seems from the PMU data that in many cases of single line to ground fault, the auto-reclosure has not operated. 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.

30 Details of tripping of Inter-Regional lines from Northern Region for June’17:

A total of 25 inter-regional lines tripping within a month occurred in the month of June’17.The list is attached at Annexure-VI 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 and DR/EL received within 24hrs: 5 events • DR/EL received after 24hrs: 7 events

25

• Fault clearance time(based on PMU data) more than CEA grid standard: 4 events

• Line tripping without any fault (based on PMU data): 7 events

Members may please note and advise the concerned for taking corrective action to avoid such tripping as well as timely submission of the information.

31 Multiple element tripping events in Northern region in the month of Jun- 2017:

A total of 16 grid events occurred in the month of Jun-2017. 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-VII It could be seen that a fault clearance of the order of 1500ms has been observed which is very much exceeding the standard value of 100ms. Further, despite persistent discussions/follow-up in various OCC/PCC meetings, the compliance of the regulations is still much below to the desired level. 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.

32 Frequency response characteristic:

Two FRC based event have occurred since last OCC meeting. Description of the events is as given below:

Table:

S. No.

Event Date

Time Event Description Starting

Frequency End

Frequency Δf (in hrs) (in Hz) (in Hz)

1 23-

May-17

18:36hrs

On 23.05.17, at 1836 hrs, Unit-I of Kudgi STPS tripped due to low air pressure. Generation loss was ~830MW

50.13 49.99 -0.14

2 27-Jun-17

00:15hrs

On 27.06.17, at 17:43hrs, On 23.05.17, at 0015 hrs, due to tripping of ICTs at 400kV Kaithal/Kirori and underlying 220kV network in Haryana, load loss of ~1750MW occurred along with generation loss of ~250MW.

50.00 50.18 0.18

26

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:

State Name FRC for events since last

OCC meeting FRC calculation for Apr-

2017 onward

23-May-17 27-Jun-17 Average Median DELHI -1% 13% 38% 46%

HARYANA 12% 79% 26% 23% PUNJAB 20% 17% 21% 18%

UTTAR PRADESH 6% 33% 38% 17% UTTARAKHAND 0% 1% 9% 13%

RAJASTAN 32% -3% 18% 4% JAMMU & KASHMIR 25% 25% 6% 2%

CHANDIGARH 0% 46% 3% 1% HIMACHAL PRADESH -37% 8% -4% -1%

NR 14% 22% 15% 15% In the above table Average and Median value of FRC calculation of total 10 events (FY 2017-18) is calculated. FRC calculation of all ISGS station for the events since last OCC meeting along with median and average value of total 10 events is tabulated below:

State Name FRC for events since last

OCC meeting FRC calculation for Apr-2017

onward 23-May-17 27-Jun-17 Average Median

Dadri-1 NA 12% 48% 47%

Ropar 69% 3% 40% 40%

Jhajjar NA 24% 29% 28%

Dadri -2 14% -4% 23% 27%

Rihand-1 47% 49% 17% 22%

Obra 15% 11% 9% 11%

Rihand-2 35% 32% 2% 9%

Sh. Cement 0% 20% 7% 7%

RAPS-B* 17% 7% 4% 6%

ROSA 1% 5% 8% 5%

Badarpur 5% 4% 4% 4%

Anta* NA NA 3% 3%

Tanda 3% -5% 2% 2%

CLP Jhajjar -4% 4% 2% 2% Rihand-3 -18% 3% -2% 1%

27

NAPS 15% 19% 6% 1%

RAPS-C -1% 2% 2% 1%

Suratgarh -44% 12% -1% 1%

Rajwest 0% NA -2% 1%

Anpara -4% -2% 0% 0%

Panipat* -9% Unit tripped 1% 0%

Dadri-Gas* -34% 0% -9% 0%

Unchahar -12% 0% -1% 0%

Auraiya* NA NA 0% 0%

Khedar 5% 4% 0% 0%

Anpara C 0% 0% 9% 0%

Paricha 0% -1% -1% 0%

Singrauli -1% 0% -7% -1%

KTPS 13% -2% -10% -2%

Faridabad* 6% 6% -10% -7%

Yamuna Nagar* NA NA Data not available

Data not available

Chabra* NA NA Data not available

Data not available

State Name FRC for events since last

OCC meeting FRC calculation for Apr-2017

onward

23-May-17 27-Jun-17 Average Median Dhauliganga NA 20% 62% 45%

Karcham Wangtoo 35% 38% 69% 43%

Chamera-1 23% 34% 35% 23% Chamera-3 46% NA 21% 20% Parbati-3* 14% NA 9% 10%

Jhakri 17% 8% 12% 8% Dulhasti 2% 2% 18% 3% Bhakra -2% -2% 2% 2%

Bairasiul NA 1% 2% 2% Koldam HEP 37% 2% 10% 2%

Uri-1 3% 3% 2% 1% Salal -2% 0% 1% 1%

Tanakpur 37% 1% 6% 1% Chamera-2 0% 10% 4% 0%

Uri-2 8% 0% -1% 0%

28

Sewa-II 124% 0% 11% 0% Rampur 23% -7% 3% 0%

Tehri NA -5% 17% 0% Koteswar 0% 0% 4% 0% Budhil* NA NA 14% 0%

VishnuPrayag 5% NA 1% 0% Dehar 4% 4% -8% -1% Pong* -24% NA -2% -1%

Malana-2* NA NA Data not available

Data not available

AD Hydro NA In line with the decisions taken during various OCC meetings, the time and date of the FRC events were e-mailed to respective utilities. Utilities may kindly submit the FRC of their control areas. In 134th OCC meeting, a scheduled interaction with constituents was finalized. The following is the status so far:

S. No. SLDC

Participating Generators (in addition to other State control area generators and SLDC)

Date Status

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

02.05.2017 Conducted successfully

2 Haryana APCPL-Jhajjar, Faridabad Gas 09.05.2017 Conducted successfully

3 Delhi Dadri stage-1&2, Dadri Gas, Bawana CCGT, Badarpur 16.05.2017

Conducted successfullyon 19.05.2017

4 Uttar Pradesh

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

23.05.2017 Postponed

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

successfully

6 Uttarakhand Dhauliganga, Tehri, Koteshwar, Gamma Infra 06.06.2017 Postponed

7 Himachal Pradesh

Jhakri, Rampur, Karcham, Chamera-I, Chamera-II, Chamera-III, Sewa-II, Parbati-III, Koldam, Baspa, AD Hydro, Malana, Malana-II, Budhil

06.07.2017 Conducted successfully

8 J&K Uri-I, Uri-II, Bairsasuil, Dulhasti 16.06.2017 Based on the one-on-one interaction with States, the following is the summary of discussions: o Punjab • After detailed deliberation in various OCC meeting, Actual response from Punjab

was still very less than the Ideal response. • RGMO/FGMO was not implemented in Rajpura, Talwandi Sabo. These

generators informed that RGMO/FGMO would be implemented by July-2017.

29

• Punjab were asked to submit the status of Implementation, healthiness of Governor System (RGMO/FGMO) of Punjab control area generators.

• Response from Ropar TPS was good. • Recently notified IEGC 5th

Amendment: http://www.cercind.gov.in/2017/regulation/130.pdfwas also discussed.

o Haryana, APCPL-Jhajjar and NTPC-Faridabad • Actual response from Haryana was very less than the ideal response. • As per SCADA data frequency response from Panipat TPS, Khedar TPS and

CLP-Jhajjar was almost negligible. • Post-response ramp back operation of APCPL generators within 1minute of

frequency response was discussed. APCPL informed that the existing RGMO setting of APCPL with NTPC-Dadri. RGMO setting would be modified accordingly to give ideal response.

• RGMO/ FGMO was not implemented in Faridabad. The station representative said that the gas generation was not in the ambit of frequency response in earlier grid code. However, after IEGC 5th amendment, gas generation has also come in the purview of frequency response and the possibility of providing primary response would be explored.

• RGSTPS, Khedar informed that the RGMO/FGMO is put in service only when machine is running on full load.

• SCADA data of DCRTPP, Yamuna Nagar was not coming to RLDC. Haryana said that the issue has been resolved and data would come in future.

o Delhi, NTPC- Dadri, Badarpur and Dadri-Gas • No response from Badarpur generation observed. NTPC informed that in one

unit of Badarpur TPS, governor would be implemented by November-2017 and in other unit governor would be implemented with R&M of the machine.

• FGMO/ RGMO scheme was not implemented in Dadri-Gas. • Bawana CCGT representative informed that FGMO/RGMO was implemented in

Bawana-Gas and it was responded properly. NRLDC requested Delhi SLDC to review the same.

• NTPC representative informed that Dadri stage-2 response was good. • Dadri stage-1 response was observed to be inadequate. NTPC stated that the

same would be taken up with OEM for proper response. • In case of Gas plant, the output response would be in reverse direction of that to

desired frequency response because of characteristics of plant equipment’s viz. motors etc.

o Rajasthan • Response was not adequate from the state generators. • Representative from Kota TPS elaborated about CMC SCHEME:When unit runs

in It Controls in a way to maintain the desired Load set point by Controlling the turbine control valve through load controller.Simultaneously controlling the “Throttle Steam Pressure” as per the CMC LOAD demand and to achieve a preset “Throttle steam pressure set point”.Within the ±1kg variation from set point is balanced by control correction of Boiler firing rate through Boiler Master. Beyond this a temporary Correction of load reference to load controller is done to immediately bring back the throttle steam pressure within this band of

30

±1kg/cm2. Another correction in this load reference may be due to RGMO effect to maintain the desired grid frequency.

• In view of above scheme it was discussed during VC that when machine is running in CMC (Coordinated Master Control), then during contradictory conditions of “RGMO correction in unit load set point” and “steam pressure correction in unit load set point” (beyond ± 1 kg/cm2 difference from pressure set point), may squeeze or enhance the reduction/overloading for RGMO correction as decided by the droop characteristic.

• Representative from Kalisindh informed about time synchronization error with GPS clock. Plant stated that time synchronization issue would be resolved by June-2017.

• Representative from Chhabra TPS informed that, governor control is taking input from machine speed control i.e. response was sluggish. Remedial action were ensured by Chhabra to improve the governor response.

• Representative from Suratgarh TPS also informed about time synchronization error and slow response from governing system. Plant stated that time synchronization issue would be resolved by June-2017 and governor response would also be continuously monitored for improvement.

• Representative from Rajwest, Kawai, Shree Cement didn’t attend the meeting. • Giral TPS units were under outage for more than two years. • NRLDC representative informed that details were pending from SLDC-Rajasthan

for most of the incident related to FRC. NRLDC representative also sharedthe FRC calculation for better understanding of all the members.

• SLDC representative assured to calculate the FRC response for future FRC incident and send the details to RLDC within 3days of the incident.

o Himachal Pradesh • HP requested to calculate the FRC response of their control area and for the

generators come under their control area. HP ensured to carry out the same. • HP stated that most of the plants in their control area are with less than 3hrs

pondage. • It was emphasized that the Grid code doesn’t restrict or hold the exempted

generators for giving any response rather it would be beneficial for the grid to get the appropriate response from the exempted generators as well, within their capability.

• Nathpa Jhakri: delayed response observed in few cases.NJPC ensured to get it checked.

• Rampur:SJVNL stated that Rampur runs in tandem operation with Jhakri. It would be worrisome to operate the plant in RGMO/FGMO mode. Hence, the RGMO/FGMO mode is in OFF condition.It was requested to explore the possibility to run the plant with RGMO/FGMO ON as: Both Jhakri and Rampur would be responding to the same frequency

change and hence would be having nearly similar response. Slight variation may not pose that much of a problem for the machine. The plant operating in tandem is not exempted from giving response as per

the grid code. SJVNL ensured to look into the issue.

• Karcham: Droop setting = 5%.Above average response observed for Karcham in most of the cases. Karcham stated that the machine runs in FGMO mode with a dead band of 49.95 to 50.05Hz i.e. the machine would respond to any decrease in frequency less than 49.95Hz and an increase in frequency beyond 50.05Hz.It was stated

31

that as per the grid code there should not be any dead band in the governor mode of operation. The only restriction is as stated under the RGMO mode in the grid code. Karcham ensured to change the governor settings in line with the IEGC grid code.

• Budhil: No representative of Greenko Budhil was present at SLDC-HP or at NRLDC.

• Koldam: Droop setting = 5%.Koldam confirmed that the RGMO/FGMO was in manual mode. The same has been put in auto mode from 04-Jul-17. Koldam ensured to provide the recent frequency based response characteristics after the RGMO/FGMO was put in auto mode.

o General action points • Healthiness of FGMO/RGMO of generators. If not implemented or out of

service/order, the date from when the FGMO/RGMO is out along with the date by which the same be put in operation.

• Governor droop setting for each generators to be shared. • Inclusion of action taken for improving the frequency response in FRC event

details provided. Further, reason for poor frequency response to be indicated against each control area response.

• Post-response ramp back criteria of generators. • Governor being put in service when machine running on full load. • Margin for frequency response shall be available every time in the stipulated

units as per IEGC 5th Amendment. • Discussion on CMC scheme (As in the case of Kota TPS) and its limitation on

frequency response. • The generating station shall not resort to Valve Wide Open (VWO) operation of

units whether running on full load or part load, and shall ensure that there is margin available for providing Governor action as primary response.

• State generators shall submit frequency response graph and data along with detailed outcome to SLDC. Analysis for state generators, IPPs and load response shall be prepared by SLDC and submitted to NRLDC/NRPC along with reason of poor response and remedial measures for the same.

Constituents may review the above points and share the actions being taken to improve the primary response. Members may 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:-01.06.2017 to 26.06.2017

S.No. State O/D: Violation in Over drawl Average No of Blocks per day U/D: Violation in Under

1 Rajasthan O/D 38

U/D 12

2 Himachal Pradesh O/D 35 U/D 11

3 Uttar Pradesh O/D 28 U/D 28

32

4 Haryana O/D 24 U/D 23

5 Punjab O/D 20 U/D 17

6 Uttarakhand O/D 19 U/D 8

7 J&K O/D 15 U/D 24

8 Delhi O/D 5 U/D 11

0 Chandigarh O/D 3 U/D 2

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).

01-June-17 to 26-

June-17 Chandiagarh Himachal Pradesh Delhi

Haryana

Punjab

J&K Uttarakhand Rajasthan

Uttar Pradesh

Total No. of Violations 120 98 86 64 63 61 57 48 30

Members may like to discuss and take action to avoid such violations.

34 Any Other Item with the Permission of the Chair.

35 Date and time of the Next Meeting.

PSDF_STATUS OF IMPLEMENTATIONANNEXUREI Schme wise status

20.06.2017

Committed (on 24.1.17)

award

Awarded amount on

date

Total Grant Fund Released (in Crs)

1 UPPTCL Installation of Capacitors and FSC. 11-May-15 39.29 35.36 8-Mar-16 36 31-Dec-17 39.29 36.55 10.07

UPPTCL Renovation and Upgradation of protection system of substations. 11-May-15 202.94 182.65 9-Mar-16 36 31-Dec-17 200.00 124.68 40.71

UPPTCL Renovation and Upgradation of protection system of substations. 17-Mar-16 80 60.00 18

2 RRVPNL Renovation and Upgradation of protection system of substations 31-Dec-14 159.53 143.58 31-Mar-16 24 30-Jun-17 39.00 10.80 Project cost reduced to 39 Crs.

RRVPNL Installation of Bus Reactors 31-Dec-14 23.87 21.48 22-Mar-16 18 30-Jun-17 23.87 23.87 6.45

3 Delhi DTL Renovation and Upgradation of Protection System 17-Mar-16 125.98 113.38 25-Nov-16 27 113.38 107.33 11.34

intuts rcvd from entities\~$PSDF_DTL 19.06.17.xlsx

4 Uttrakhand PTCUL Renovation and Upgradation of Protection System 17-Mar-16 125.05 125.05 25-Nov-16 18 125.00 113.09 12.50

intuts rcvd from entities\PTCUL\PSDF_review_meeting_20.6.2017.docx

5 PSTCL Bus bar protection 17-Mar-16 18.21 16.39 18

PSTCL Provision of second DC Source at 220KV & 132KV Grid Sub Station 2-Jan-17 15.3 13.77

6 Haryana HVPNL Detailed Project Report Smart Grid Project Gurgaon City Fist Phase DLF Sub Station Area

2-Jan-17 364.27 273.20 18 NIT under hold

7 PDD-J&KRenovation and Upgradation of protection system of substations in Jammu

28-Oct-15 140.04 140.04 18 140.00 0.00 intuts rcvd from entities\J&K\PSDF_review meeting_20.6.2017_annexure-I - srinagar.docx

PDD-J&KRenovation and Upgradation of protection system of substations in Kashmir

17-Mar-16 146.12 146.12 18

8 Himachal Pradesh HPSEBL Renovation and Upgradation of

Protection System 5-Jan-16 55.44 55.44 31-May-17 18 30-Jun-18 39.76 5.54 intuts rcvd from entities\PSDF Status_HPSEBL.pdf

9 PGCIL BNC-AGRA 10-Mar-17 5778 2889.00

RECTPCL & PGCIL 11kV feeder monitoring 10-Mar-17 233.03 233.03

PGCIL URTDSM Scheme 31-Dec-14 374.63 262.24 29-Oct-15 30-Jun-17 173.99 Under completion

PGCIL Installation of STATCOMs in ER 5-Jan-16 700.31 630.28 31-Mar-17 63.03

DVCRenovation and Upgradation of the protection and control system of Ramgarh Sub Station.

2-Jan-17 28.85 25.96 31-May-17 1.07 2.60intuts rcvd from entities\DVC\PSDF_review meeting_20.6.2017_annexure-I DVC Ramgarh Ss.docx

10 NRPC NRPC Study Program on the integration of renewable energy resources

16-May-17 6.45 6.45 31-Mar-16 4.49 Completed

Punjab

Revised schedule (as committed on

24.01.17)

Date of release of 1st

installment Present StatusDate of Sanction

STATUS OF IMPLEMENTATION

CPSU

Jammu & Kashmir

Uttar Pradesh

Rajasthan

POWER SYSTEM DEVELOPMENT FUND Annexure -I

Funds disbursment status (Crs)

Award Status (in Crs)Sl.No

Name of State/Entity

Name of Entity Name of Scheme

Accepted Cost (Crs)

Grant Approved

(Crs)

Completion schedule as per DPR (Months)

ANNEXURE II

Sl. Name o f Substation

MVA Capacity

Expected Schedule Remarks

Down Stream network by State utilities from ISTS Station being ready shortly

1

400/220kV Parbati Pooling Station

2x315 April 2017

Downstream system for 6 Nos 220 kV bays to be matched. S tate ( Himachal Pradesh) Line (18 Kms) work in progress.

2

Hamirpur 400/220 kV Sub-station Readiness by Aug-17

2x 315 MVA

04 nos . 22 0 k V downstream l ines commissioned

Status of do wnstream system for bal ance 2 N os 220kV bays. Line(70 Kms.) yet to be awarded by HP.

3 Kaithal 400/ 220 kV Sub-station

1x 315 MVA

July 2017 (Shifting of Transformer f rom Ballabhgarh). Shifting of T fr expected i n Apr/May-17

Status of do wnstream system for 2 N os 220 k V bays. Line yet to be awarded by State

4

Aug of Transformers in 400/220kV S ikar S/s

1x 315 MVA

Ready by J un-17 (IA-Jan-18)

RRVPNL (Rajasthan) y et t o start c onstruction of downstream line

Down Stream network by State utilities from ISTS Station already commissioned

1 400/220kV Kurukshetra S/Stn. (GIS)

2x500 440kV bay & 2 no. ICTs ar e r eady f or commissioning.

Downstream f or 8 N os 220 kV bays to be matched by HVPNL.

2

Jalandhar 400/220 kV Sub-station

1x 500 MVA

Commissioned (Jun 2016)

Status of do wnstream system for bal ance 2 N os 220 kV bays t o be upd ated by PSTCL.

3

400/220kV Bagpat Gas Insulated Stn.

2x500

Commissioned

(03 nos 2 20 k V downstream l ines already commissioned) Shyamali, Muradnagar and Bagpat connected to PG S/s

Status of do wnstream system for bal ance 5 N os 220 kV bays t o be upd ated by UPPTCL.

4 400/220 kV Saharanpur Sub station

2x315 Commissioned.

(02 nos. 220 kV downstream l ines

Status of do wnstream system for bal ance 4 N os 220 kV bays t o be upd ated by UPPTCL.

Sl. Name o f Substation

MVA Capacity

Expected Schedule Remarks

commissioned)

5 400/220kV Dehradun S ub station

2x315

Total 6 bays for UPPTCL l ine. O nly two ba ys commissioned. Balance 4 ba ys i dle charged since long

UPPTCL yet to s tart construction of bal ance downstream line

6

400/220kV Kotputli Substation

2x315

Commissioned.

02 nos . 220kV downstream l ines commissioned o n 27.05.2015.

Status of do wnstream system for bal ance 4 N os 220 kV bays t o be upd ated by RVVPNL.

7 400/220kV Jaipur S outh Substation

2*500 04 n os 2 20 k V downstream l ines commissioned

Status of do wnstream system for bal ance 4 N os 220 kV bays t o be upd ated by RVVPNL.

8

400/220 kV Sohawal Substation

(06 nos 220 k V bays)

2*315 Commissioned. Downstream system for 6 Nos 220 kV bays to be updated by UPPTCL.

9 400/220 kV Kota Substation

400 kV bays at Kota S/s

400 k V A nta-Kota T/L of RVVPNL

Status of 40 0 k V Anta-Kota T/L t o be updat ed by RVVPNL.

10 Shahjahanpur 400/220 kV Sub-station

2x 315 MVA

Commissioned.

01 nos . 22 0 k V downstream l ines commissioned

Status of do wnstream system for bal ance 5 N os 220 kV bays t o be upd ated by UPPTCL.

11

Jalandhar 400/220 kV Sub-station

1x 500 MVA

Commissioned (Jun 2016)

Status of do wnstream system for bal ance 2 N os 220 kV bays t o be upd ated by PSTCL.

12 02 nos . ba ys a t Moga S/s

Bay c ommissioned on 28. 06.2015 however downstream l ines not commissioned.

Status of do wnstream system for 2 N os 220 k V bays to be updated by PSTCL.

SL. No Element Name Type Voltag

e Level OwnerOutage Expected

Revival Date

Reason / RemarksDate Time

1 Makhu 80 MVAR B/Reactor 1

Bus Reactor 400 kV PSTCL 02.05.2017 12:37 No update till

now

General maintenance --- periodical testing and maintenance and summer preparedness.

2 FSC of Pampore-2 at Kishenpur FSC 220 kV PGCIL 30.10.2017 12:00 No requirement

as on dateLine length has reduced after LILO work completion

3 FSC of Pampore-1 at Kishnpr FSC 220 kV PGCIL 30.10.2017 12:00 No requirement

as on dateLine length has reduced after LILO work completion

4 Gaya-Varanasi 1 Line 765 kV PGCIL 17.05.2017 16:04 16.06.2017 Phase to phase fault Tower No. 66,67,68 collapsed(ER1)

5

765 kV (3*110) 330 MVAR Line Reactor (Non-Switchable) of Unnao ckt 1 at Anpara D TPS

Line Reactor 765 kV UPPTCL 13.04.2017 18:19

No update till now Due to not completion of 765 kV Line

Anpara D

6 Bamnauli(DTL)-Jhatikara(PG) 1 Line 400 kV DTL 22.05.2017 20:29 07.07.2017

Tower damage (First dead end tower from Bamnauli S/S) / Ckt-II charge through ERS tower

7 Bawana-Mundka 1 Line 400 kV DTL 14.05.2017 9:03 31.07.2017 Fire below 400kV tower no. 116, in the line

8 Bawana-Mundka 2 Line 400 kV DTL 14.05.2017 9:50 31.07.2017

Manually Opened on emergency. Fire below 400kV tower no. 116, in the line leading to Insulator damage and Tower bend

9 Mainpuri(PG)-Orai 400(UP)-1 Line 400 kV UPPTCL 17.05.2017 13:51 20.06.2017 Tower collapsed Tower collapse

10 Orai 400-Paricha TPS-1 Line 400 kV UPPTCL 17.05.2017 13:51 10.07.2017 Tower collapsed Tower collapse

11 Mainpuri(PG)-Paricha(UPPTCL) -1 Line 400 kV UPPTCL 17.05.2017 13:51 10.07.2017 Tower collapsed Tower collapse

SL.No Element Name Type Voltage

Level Owner

OutageExpected

Revival Date Reason / RemarksDate Time

12 Kalisindh 315 MVA ICT-1 ICT 400/220 kV RRVPNL 04.06.2017 15:50 30.09.2017 Buchholz relay operated.

13 Anpara 100 MVA ICT 2 ICT 400/132 kV UPPTCL 15.02.2017 20:25 No update till now DGA test values are poor

14 Panki 240 MVA ICT 2 ICT 400/220 kV UPPTCL 27.05.2017 3:13 30.06.2017 R phase LA and CT blast of ICT-II at Panki

15 Sarnath 50 MVAR B/R Bus Reactor 400 kV UPPTCL 16.02.2009 6:14

125 MVAR B/R is being installed in

place of it which is expected to be

commissioned by 31.07.2017.

Failure of Reactor

16 Wagoora 50 MVAR B/R Bus Reactor 400 kV PGCIL 22.04.2015 18:56 No requirement as on

dateTake out due to low

voltage.

17 FSC ( 50% ) of Koteshwar Pool -2 at Meerut (PG) FSC 400 kV PGCIL 16.07.2015 13:01 30.06.2017 Fire in FSC-2 at Meerut.

18 FACT at BLB in Knp-BLB-I FACTS 400 kV PGCIL 02.07.2016 10:20 No update till now Y-Phase current imbalance

19 FSC (40%) of Fatehpur-II at MainpurI(PG) FSC 400 kV PGCIL 07.05.2017 13:13 15.07.2017 B-ph Capacitor unbalance

20 220 kV Kishenpur-Meerbazar (JK) Line 220kV J & K 08.02.2017 15:23 No update till now

Line tripped on R-Y-N fault. Tower no. 175

collapsed.{11Km from Ramban (towards Kishenpur

direction) }.

21 TCSC1 of Muzaffarpur-1 at Gorakhpur TCSC 400 kV PGCIL 17.09.2016 11:23 15.08.2017 Signal problem

22 FSC (40%) of Fatehpur-I at MainpurI(PG) FSC 400 kV PGCIL 12.08.2016 11:45 15.08.2017 Due to self-triggering of

spark-gap

SL. No Station Location Owner Unit No Capacity Reason(s)

OutageExpected Revival

DateDate Time

1 RAPS-A RAJASTHAN NPC 1 100 Subject to regulatory clearance 09.10.2004 22:58

2 Dehar HPS HP BBMB 6 165 Renovation work. 21.03.2014 18:00 30.06.2017

3 Badarpur TPS DELHI NTPC 2 100 Order of NGT for Environmental protection 24.09.2015 19:29

4 Badarpur TPS DELHI NTPC 3 100 Order of NGT for Environmental protection 09.10.2015 1:00

5 Badarpur TPS DELHI NTPC 1 100 Order of NGT for Environmental protection 30.10.2015 15:30

6 Bhakra-L HPS HP BBMB 5 108 Replacement of Generator Shaft 12.04.2016 9:50 31.03.2018

7 Bhakra-R HPS HP BBMB 1 157 Annual maintenance 09.11.2016 8:00 14.06.2017

8 Obra TPS UP UPRVUNL 7 100 R & M work 01.07.2010 13:44 31.12.2017

9 Obra TPS UP UPRVUNL 12 200 Annual maintenance 01.10.2016 14:01 31.12.2017

10 Dehar HPS HP BBMB 5 165 Rotor Earth Fault 02.05.2017 10:31 03.09.2017

11 Giral (IPP) LTPS RAJASTHAN RRVUNL 1 125 Bad materials leakage. 11.07.2014 8:20 30.06.2018

12 Giral (IPP) LTPS RAJASTHAN RRVUNL 2 125 Boiler tube leakage 27.01.2016 15:27 30.06.2018

13 Talwandi Sabo TPS PUNJAB PSPCL 2 660

Earlier out on less demand,now constraint

due to fire at coal handling plant

05.04.2017 13:19 30.06.2018

14 Talwandi Sabo TPS PUNJAB PSPCL 3 660 Tripped due to fire at coal handling plant 18.04.2017 5:47 30.06.2018

15 Talwandi Sabo TPS PUNJAB PSPCL 1 660 Tripped due to fire at coal handling plant 18.04.2017 6:30 30.06.2018

16 Paricha TPS UP UPRVUNL 1 110 Renovation work. 2/7/2016 17:30

Annexure-A

Preliminary report

Complete station outage of 765/400kV Balia (PG) and 400/132kV Mau (UP) station on 09th July 2017 at 08:41hrs

A. Event Summary: At 08:29hrs, 400kV Balia-Patna ckt-4 was taken under planned shutdown. It has been reported that a bus fault occurred at 400kV Balia (PG) station at 08:41hrs and 400kV bus bar protection was not in service. All 400kV and 765kV lines tripped from remote end of 765/400kV Balia (PG) station. 400/132kV Mau (UP) station became dead due to tripping of all 400kV connected lines from Mau (UP). Due to tripping of all 400kV connected lines of Balia, power flow on HVDC Balia-Bhiwadi became zero, which would have resulted into SPS operation.

Event Category :GD-1

Load Loss :420MW (SLDC Punjab, Haryana. Rajasthan, UP, Delhi shall confirm about load loss due to SPS operation of HVDC Balia-Bhiwadi Bipole tripping) Generation Loss :Nil (Generation backing down details due to SPS operation of HVDC Balia-Bhiwadi Bipole tripping to be shared by NTPC) Energy Unserved :0.7MU (States shall confirm)

B. Antecedent conditions (at 05:50hrs): Grid Frequency : 50.04Hz NR Demand Catered : 47305MW Net Inter Regional Export : 8152MW HVDC Rihand-Dadri Flow : 700MW (towards Dadri) HVDC Mundra-Mohindergarh : 1200MW (towards NR) HVDC BNC-Agra : 1200MW (towards NR) HVDC Champa-Kurukshetra : 1500MW (towards NR) HVDC Balia-Bhiwadi Flow : 1000 MW (towards Bhiwadi) Vindhyachal BtB Flow : 500MW (North to West)

400kV Balia-Patna ckt-4 was under planned outage from 08:29hrs.

C. Connectivity Diagram:

D. Restoration:

S. No. Tripped element Tripping Time

(09.07.17) Restoration Time

(09.07.17)

1 765kV Balia -Sasaram 08:41 10:36

2 765kV Balia -Varansi 08:41 10:48

3 765kV Balia–Lucknow 08:41 11:38

4 HVDC Balia –Bhiwadi Pole 1 08:41 11:59

5 HVDC Balia –Bhiwadi Pole 2 08:41 12:11

6 400 kV Balia- Sohawal 1 08:41 09:49

7 400 kV Balia- Sohawal 2 08:41 09:51

8 400 kV Balia- Patna 1 08:41 10:03

9 400 kV Balia- Patna 2 08:41 10:05

10 400 kV Balia- Patna 3 08:41 11:53

11 400 kV Balia- Patna 4 08:29 Under Planned S/D

12 400 kV Balia- Mau 1 08:41 10:43

13 400 kV Balia- Mau 2 08:41 10:51

14 400 kV Balia-Biharsharif 1 08:41 11:28

15 400 kV Balia-Biharsharif 2 08:41 11:29

16 400 kV Mau-Anpara 08:41 10:13

17 400 kV Mau-Azamgarh 08:41 09:58

E. Preliminary references from PMU/SCADA:

From PMU (attached in Annexure-1): o Fault clearance time was ~1480ms o Maximum dip in Blue-phase. o 400kV Balia Bus Voltage became zero

From SCADA SoE and Analog data(attached in Annexure-2) :

o At 08:41:51.411hrs, 400kV Sohawala-Balia ckt 1 tripped from Sohawal end. o At 08:41:51.479hrs, 400kV Sohawala-Balia ckt 2 tripped from Sohawal end. o At 08:41:51.497hrs, 400kV Anpara-Mau ckt tripped from Anpara end. o At 08:41:52.509hrs, 765kV Lucknow-Balia ckt tripped from Lucknow (PG) end. o At 08:42:28.503hrs, 400kV Azamgarh-Mau ckt tripped from Azamgarh end.

o At 08:29hrs, power flow on 400kV Balia-Patna ckt-4 became zero as planned

shutdown was taken for this line. o At 08:41hrs all the 400kV and 765kV connected elements power flow became

zero

As reported, all 400kV and 765kV line tripped from remote end of 765/400kV Balia (PG) station.

±500kV HVDC Balia-Bhiwadi SPS may have operated. Planned SPS details is attached as Annexure-3

F. Operational and Protection issues:

1. Delayed clearance of fault and non compliance of CEA Grid Standard 3.1.e and CEA Transmission Planning Criteria

2. Operational issues during planned shutdown of transmission line, which caused bus fault. 3. Operational Practices and periodicity of healthiness checking for Protection system. 4. At 08:29hrs, non-operation of pole discrepancy for Balia-Patna ckt-4 ckt at Balia end to

be checked. 5. At 08:41hrs, non-operation of bus bar protection/Zone-4 in case of bus fault at Balia (PG)

to be checked. 6. ±500kV HVDC Balia-Bhiwadi SPS operation details to be provided. Generation backing

down details from Rihand, Singrauli and Kahalgaon needs to be forwarded. 7. Reason of tripping of 400kV Anapara-Mau line immediately during fault (Protection over

reach). 8. Reason of non-tripping of 400kV Balia-Mau ckt-1 & 2 from Mau end. 9. Reason of tripping of 400kV Azamgarh-Mau ckt from Azamgarh end. Observed, frequent bus fault occurred in Northern region during planned outage of transmission line. This issue needs to be looked into.

G. Actions taken at Control room:

Instruction were issued to SLDCs and generators to strictly follow their schedules. Charging codes were issued for immediate revival of the tripped elements. Information to be received from utilities:

All utilities may expedite necessary details(DR/Report) for the above event.

Annexure-1

Graphical plots:

Fig. PMU plot of voltage at Agra & Kanpur at 08:41hrs

Fig. PMU plot of voltage of Balia at 08:41hrs

Fig. PMU plot of current of Balia at 08:41hrs

Fig. PMU plot of Frequency and df/dt

Annexure-2

Fig. SCADA data plot of Line Flows from Balia

Fig: SCADA data plot of HVDC Balia-Bhiwadi Power flow and HVDC Balia Voltage

Fig:SCADA data plot of 765kV Power flow at BaliaStation

Fig:SCADA data plot of 400kV Power flow at MauStation

SCADA SoE:

Time (in hrs) Station Voltage (in kV)

Element Device Status Remarks

08:41:51,406 SOHAWAL 400kV 8T2BA1 CB Open Main & Tie CB of Sohawal-Balia ckt-1 08:41:51,411 SOHAWAL 400kV 7BALIA1 CB Open

08:41:51,429 SOHAWAL 400kV FSC1 CB Open Main & Tie CB of

Sohawal-Balia ckt-2 08:41:51,476 SOHAWAL 400kV 10BALIA2 CB Open

08:41:51,476 SOHAWAL 400kV 11T1BA2 CB Open

08:41:51,497 ANPAR_UP 400kV F_17(MAU-1) CB Open Anpara-Mau ckt

tripped from Anpara end

08:41:52,276 LUCKNOW765 400kV G_1(BALIA-1

BUS-1) CB Open

Main & Tie CB of 765kV Lucknow-Balia ckt tripped

from Lucknow end 08:41:52,509 LUCKNOW765 400kV G_2(BALIA TIE) CB Open

08:42:18,393 AZAM1_UP 400kV 9MAU CB Open Azamgarh-Mau line tripped from

Azamgarh end 08:42:28,503 AZAM1_UP 400kV 10MAU CB Open

Annexure-3

System Protection Scheme (SPS) for HVDC Balia-BhiwadiBipole

Case Contingency Action

Case-1

Tripping of pole resulting in power order reduction by more than 500 MW and upto 750 MW. (Measured at Bhiwadi)

Shed Loads in Groups C & D (of Fig 1 Load Details).

Case-2

Tripping of pole resulting in power order reduction by more than 750 MW and up to 1500 MW. (Measured at Bhiwadi)

Action-1:- Shed Loads in Groups A, B, C& D as Described (of Fig 1 Load Details). Action-2:- Automatically back down generation by 250 MW at Singrauli-Rihand complex in Northern region and by 250 MW in the Eastern region at Kahalgaon in the shortest possible time

Case-3

Tripping of poles resulting in power order reduction above 1500 MW and up to 2000 MW.(Measured at Bhiwadi)

Action-1:- Shed loads in Groups A, B, C, D, E & F (of Fig 1 Load Details). Action-2:- Automatically back down generation by 750 MW at Singrauli-Rihand complex in northern region and by 750 MW in the eastern region at Kahalgaon/ Barh/ Farakka in the shortest possible time.

Case-4

Tripping of poles resulting in power order reduction above 2000 MW. (Measured at Bhiwadi)

Action 1:- Shed loads in Groups A, B, C, D, E, F &G(of Fig 1 Load Details). Action 2:- Automatically back down generation by 750 MW at Singrauli-Rihand complex innorthern region and by 750 MW in theeastern region at Kahalgaon/ Barh/Farakka in the shortest possible time.

Remark:

1. The envisaged automatic backing down of generation in the Singrauli-Rihand

complex for Case-2 is yet to be implemented.

2. Load Shedding shall be achieved within 500ms, including all signal propagation/

breaker opening time delay

Load Group details:

Delhi UP Rajasthan Haryana Punjab

Sl.

No. Gro

up

Load Planne

dLoad(

MW)

Load Planne

dLoad(

MW)

Load Planne

dLoad(

MW)

Load Planne

dLoad(

MW)

Load Planne

dLoad(

MW)

Grou

pTot

al

1

Gro

up

-A

Mandaula(PG

)-220kV

Mandaula-

NarelaD/C

150

Feedersfrom22

0/132kVMurad

nagarolds/s

100

220/132kVBagru-

132kVGSSBa

gru

25

220/66kVMalerk

otla-

66kVMalerkotlack

t-

66kVNaudhranick

t

35

310

2

Gro

up

-B

Mandaula(PG

)-

220kVManda

ula-Gopalpur

200

220/132kVRatangarh

-

132kVGSSMom

asar

26

Panipat(BBMB)-

1x100MVA,220/33

kVICTatPanipat

50

276

3

Gro

up

-C

Feedersfrom22

0/132kVModip

uramsubstation

100

220/132kVKota-

132kVBaroli;220/132k

VBhilwara-

132kVGSSHamirgarh

60

Samaypur(BBMB)-

220kVSamaypur-

PalwalD/C

50

220/66kVGobindgarh-1

-66kVChourwalackt

-66kVTalwarackt-1

-66kVTalwarackt-2

71

281

4

Gro

up

-D

220/132kVAlwar-

132kVGSSBansoor,13

2kVGSSRatangarh

59

Samaypur(BBMB)-

220kVSamaypur-

BadshahpurD/C

90

220/66kVLaltokalan

-66kVGillRoadckt-1

-66kVGillRoadckt-2

-66kVFerozpurRoadckt

90

239

5

Gro

up

-E

220kVMainpuri

-

2x132/33kV,40

MVAT/F(20MW

-60MW)

50

220/132kVAlwar-

132kVGSSMalakheda;

220/132kVBhilwara-

132kVGSSGangapur,1

32kVGSSDanta,132kV

GSS

Devgarhand132kVGSS

Kareda;220/132kVMe

rta-132kVGSSKuchera

100

132kVPTPS-

132kVPTPS-Chanduali

132kVPTPS-Munak

50

220kVJamsher

-66kVNakodarRo

ad-1

-66kVNakodarRo

ad-2

100

300

6

Gro

up

-F

220kVNara-

132/33kV,40MV

AT/Fand132/33

kV,63MVAT/F(3

2MW-52MW)

50

220/132kVAlwar-

132kVGSSAlwar(locall

oad);220/132kVMert

a-

132kVGSSLamba,132

kVGSSGolan

100

132kVNarwana

132kVNarwana-Garhi

132kVNarwana-Tohana

132kVNarwana-Uklana

132kVNarwana-

Dhamtansahib132/33

kVT/F20MVA

132/11kVT/F8MVA

75

220kVMohali

-66kVMohalickt

1&2

-66kVMohalickt

3&4

100

325

7

Gro

up

-G

400/220kVRatangarh

-

220kVGSSSujangarh,a

nd220/132kVRatanga

rh-

132kVGSSSardarsahar

100

132kVDadri

132kVDadri-

Dadricity132kVD

adri-Matenhail

132kVDadri-Kalanaur

132kVDadri-

Bahu132/33kVT/

F20/25MVA 132/33kVT/F16/20MVA

75

220kVAblowal

-66kVRakhra-1

-66kVRakhra-2

-66kVRakhra-3

-66kVRakhra-4

100

275

TOTAL 350 300 470 390 496 2006

Annexure-V

S.NO. Element NameNo. of forced

outagesUtility

Outage Date

Outage Time

Reason/Remarks

5-Jun-17 16:49 Phase to earth fault. Tripped from Champa end.

7-Jun-17 15:08 DMR-2 O/C protn. Optd.

7-Jun-17 17:05 Fault in VBE at Champa end.

15-Jun-17 15:50 CLD protn. optd.

19-Jun-17 17:04Maloperation of Valve Based Electronic device resulted in CLD Line protection operation.

21-Jun-17 19:09DC Line fault at Champa. From PMU, around 5 KV fluctuations observed for 15sec.

22-Jun-17 17:36Due to some spurious signals from control system at Champa.

23-Jun-17 15:44 CLD on HV Cable protection optd. at Champa end.

25-Jun-17 19:31 DC Undercurrent protection operated

25-Jun-17 21:14 VBE protection optd. at Champa end.

27-Jun-17 20:59 DC undercurrent protection operated

1-Jun-17 8:06 Others

10-Jun-17 14:38Phase to earth fault. B-N. From PMU, no auto-recloasing obseved.

14-Jun-17 13:42Tripped on B-N fault. From PMU, no auto-recloasing obseved.

15-Jun-17 22:55Phase to earth fault. B phase E/F at 72 km from Agra. From PMU, two fault observed 2sec apart.

16-Jun-017 0:34Phase to earth fault. B phase at 45.85 km from Agra, from PMU trriped in reclaim time.

3-Jun-17 12:19Details awaited. From PMU unsuccessful A/R observed.

3-Jun-17 15:32 Tripped.

11-Jun-17 9:49Phase to earth fault. B Phase E/F at a distance of 137 km from Banda.

16-Jun-17 16:55 B-N fault Trip.

23-Jun-17 13:01Earth Wire in between loc. AP - 5 and AP -6 found loose. From PMU, no fault observed

14-Jun-17 15:26Phase to earth fault. . Y-ph, From PMU, two fault observed 3sec apart.

16-Jun-17 2:34B Phase 47.4 KM from Dhanonda. From PMU, two fault observed 2sec apart.

17-Jun-17 7:56Three phase fault. R-Y-B Ph ,Z-1,2.25 KM. From PMU, two fault observed 7sec apart.

19-Jun-17 22:45Tripped due to bad weather. From PMU, two fault observed 7sec apart.

7-Jun-17 16:32DT received at Agra(Fatehabad) end. From PMU, no fault observed.

16-Jun-17 15:27Direct trip. From PMU, delayed clearence of fault and no A/R observed.

20-Jun-17 7:42B-N fault. Charging attempt taken but line did not hold. From PMU, no A/R observed.

24-Jun-17 20:04 Reason awaited. From PMU, two fault observed.

11-Jun-17 1:17 Tripping details awaited from Punjab.

13-Jun-17 19:42 Phase to earth fault. From PMU, no A/R observed.

18-Jun-17 7:02Due to tripping of ICT-3 at Rajpura. From PMU no A/R observed.

13-Jun-17 21:15Phase to earth fault. B-Ph,96.9KM from Muradnagar end. From PMU, unsuccessful A/R observed.

14-Jun-17 14:20Distance protection operated. Details awaited. From PMU, unsuccessful A/R observed.

26-Jun-17 4:11Phase to earth fault. B-N. From PMU, unsuccessful A/R observed.

5-Jun-17 17:35 Y-N fault.

8-Jun-17 0:29 Phase to earth fault. Y ph E/F 125 KM.

9-Jun-17 21:02 Direct trip received at RAPP-C.

16-Jun-17 15:26 Others.

20-Jun-17 14:19 DC O/C protn. Optd.

28-Jun-17 16:59 Over voltage. DC overcurrent relay operated.

1 800kV HVDC Champa(WR) - Kurukshetra(NR) Pole -1

11 POWERGRID

2 400kV Agra(PG)-Bassi(PG) ckt-1 5 POWERGRID

3 400kV Allahabad(Rewa Road)(UP) - Banda(UP) ckt-2

5 UP

4 400kV Daultabad(HVPNL)-Dhanonda(HVPNL) ckt-1

4 Haryana

5 400kV Fatehabad(UP)-Mathura(UP) ckt-1 4 UP

6 400kV Dhuri(PSTCL)-Rajpura(PSTCL) ckt-2 3 Punjab

9 Vindhyachal HVDC BtB Block 1 3 POWERGRID

7 400kV Fatehabad(UP)-Muradnagar New(UP) 3 UP

8 400kV RAPS C(NPC)-Shujalpur(PG) ckt-1 3 RAPPTCL/ POWERGRID

Annexure-VI

Page 1 of 2

Date Time Date Time

1 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 5-Jun-17 16:49 DC line to earth fault. 5-Jun-17 18:45 NO NO NO restart attemt observed

2 400 kV RAPS C(NPC)-Shujalpur(PG) 1NPCIL/

POWERGRID5-Jun-17 17:35 Phase to earth fault. Y-N 5-Jun-17 19:17 NO Yes

From DR/PMU it seems Autoreclose didn't operate

3 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 7-Jun-17 15:08DMR-2(Dedicated Metallic Return) O/C protn. Optd.

7-Jun-17 15:18 NO NO From PMU, no fault observed

4 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 7-Jun-17 17:05Fault in VBE(Valve base electronics) at Champa end.

7-Jun-17 18:49 600msec NO NO

5 400 kV RAPS C(NPC)-Shujalpur(PG) 1NPCIL/

POWERGRID8-Jun-17 0:29 Phase to earth fault. Y-N 8-Jun-17 1:37 NO NO

From PMU it seems Autoreclose didn't operate

6 400 kV RAPS C(NPC)-Shujalpur(PG) 1 NPCIL/ POWERGRID

9-Jun-17 21:02 Direct trip received at RAPP-C. 10-Jun-17 0:07 NO NO From PMU, no fault observed

7 500 kV HVDC Sasaram HVDC BtB POWERGRID 11-Jun-17 5:38 System failure alarm. 11-Jun-17 6:48 NO NOFrom PMU, Sudden rise in Voltage observed, No fault observed

8 220kV Auriya-MalanpurNTPC/

POWERGRID14-Jun-17 21:03 R phase to earth fault 14-Jun-17 21:53

Yes( after 24hrs)

Yes( After 24hrs)

From DR/PMU it seems Autoreclose didn't operate

9 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 15-Jun-17 15:50 CLD protn. optd. 15-Jun-17 16:45 NO Yes

From TFR, flow of fault current in metallic Return conductor observed, and telecom was in proper function, CLD protection operated!.

10 70 kV HVDC Vindhyachal HVDC BtB Block 2 POWERGRID 16-Jun-17 15:26 GI2DC Over current and Short circuit operated at HVDC Vindyachal ,due to fault at NTPC/VSTPP

GI2 16-Jun-17 19:39 400 msec Yes Yes

From PMU, delayed fault clearance observed.Control system parameters ; VDCOL and CCA settings to be checked by POWERGRID

From PMU, no fault observed

11 70 kV HVDC Vindhyachal HVDC BtB Block 1 POWERGRID 16-Jun-17 15:26 GI2DC Over current and Short circuit operated at HVDC Vindyachal ,due to fault at NTPC/VSTPP

GI2 16-Jun-17 16:35 400msec Yes YesControl system parameters ; VDCOL and CCA settings to be checked by POWERGRID

From PMU, no fault observed

12 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 19-Jun-17 17:04Maloperation of Valve Based Electronic device resulted in CLD Line protection operation.

19-Jun-17 17:45 NOYes( After

24hrs)

13 70 kV HVDC Vindhyachal HVDC BtB Block 1 POWERGRID 20-Jun-17 14:19 DC O/C protn. Optd. 20-Jun-17 15:47 NO NOControl system parameters ; VDCOL and CCA settings to be checked by POWERGRID

From PMU, no fault observed

14 765 kV Fatehpur-Pusauli-1 POWERGRID 20-Jun-17 17:18Y-N fault, Dist. 310km from Fatehpur end.

20-Jun-17 18:49 500 msec NO NO

From PMU, max dip observed in Y-phase and delayed fault clearance observed

Load Loss/ Gen. Loss

Other Protection Issues and Non Compliance

Remedial Action

RemarksBrief Reason(As reported)

Category as per CEA

# Fault Clearance Time

*FIR Furnished (YES/NO)

DR/EL provided in

List of Tripping of Inter Regional Lines for the month of June 2017Outage Restoration S. No. Name of Transmission Element Tripped Owner/ Utility

Annexure-VI

Page 2 of 2

Date Time Date TimeLoad Loss/ Gen. Loss

Other Protection Issues and Non Compliance

Remedial Action

RemarksBrief Reason(As reported)

Category as per CEA

# Fault Clearance Time

*FIR Furnished (YES/NO)

DR/EL provided in

List of Tripping of Inter Regional Lines for the month of June 2017Outage Restoration S. No. Name of Transmission Element Tripped Owner/ Utility

15 220kV Auriya-MalanpurNTPC/

POWERGRID21-Jun-17 14:21 Phase to earth fault. B-N 21-Jun-17 16:33

Yes( After 24hrs)

Yes( After 24hrs)

From DR/PMU it seems Autoreclose didn't operate

16 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 21-Jun-17 19:09 DC Line fault at Champa 21-Jun-17 19:57 NOYes( After

24hrs)From TFR, one restart attempt observed

17 800 kV HVDC Agra - Biswanath Cherialli line -2 POWERGRID 22-Jun-17 9:12 Emergency stop by BNC end 22-Jun-17 9:44 NO NO

18 500 kV HVDC Mohindergarh-Mundra Pole 2 APL 22-Jun-17 10:03 - 22-Jun-17 10:44 NO NO From PMU, no fault observed

19 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 22-Jun-17 17:36Due to some spurious signals from control system at Champa.

22-Jun-17 18:52 NO Yes

20 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 23-Jun-17 15:44CLD on HV Cable protection optd. at Champa end.

23-Jun-17 16:17 NOYes( After

24hrs)

21 800 kV HVDC Agra - Biswanath Cherialli line -2 POWERGRID 25-Jun-17 6:27OLTC gas relay operated at AGRA end

25-Jun-17 12:14 NO NO

22 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 25-Jun-17 19:31DC Undercurrent protection operated

25-Jun-17 20:27 NOYes( After

24hrs)

23 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 25-Jun-17 21:14VBE protection optd. at Champa end.

25-Jun-17 21:46 NOYes( After

24hrs)

24 800 kV HVDC Champa(WR) - Kurukshetra(NR) line -1 POWERGRID 27-Jun-17 20:59DC undercurrent protection operated

27-Jun-17 21:35 NO NO

25 70 kV HVDC Vindhyachal HVDC BtB Block 1 POWERGRID 28-Jun-17 16:59Over voltage. DC overcurrent relay operated

28-Jun-17 17:57 NO NOControl system parameters ; VDCOL and CCA settings to be checked by POWERGRID

From PMU, no fault observed

1Fault Clearance time(>100ms for 400kV and >160ms for 220kV)

2 DR/EL Not provided in 24hrs3 FIR Not Furnished4 Protection System Mal/Non Operation5 A/R not operation

CLD Cable Longitudinal Differential protectionTFR Transient Fault Record

VDCOL Voltage Dependant Current Operate LimitCCA Current Control AmplifierPMU Phasor Measuring Unit

Legends

1. IEGC 5.9.6.a 2. CEA Gris Standard 12.2 (Applicable for SLDC, ALDC only)1. CEA Technical Standard of Electrical Plants and Electric Lines: 43.4.A 2. CEA (Technical Standards for connectivity to the Grid) Regulation, 2007: Schedule Part 1. (6.1, 6.2, 6.3)1. CEA Technical Standard of Electrical Plants and Electric Lines: 43.4.C 2. CEA Technical Planning Criteria

# Fault Clearance time has been computed using PMU Data from nearest node available and/or DR provided by respective utilities ( Annexure- II)*Yes, if written Preliminary report furnished by constituent(s)

Reporting of Violation of Regulation for various issues for above tripping

1. CEA Grid Standard-3.e 2. CEA Transmission Planning Criteria

1. IEGC 5.2(r) 2. CEA Grid Standard 15.3

Annexure-VII

Outage Duratio

Date Time Date Time Time within 24hrs

after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

ReceivedNot

Received

1 NR1.400kV Chamba-Chamera ckt-22.400 kV Jallandhar Chamba ckt-13.315MVA 400/220kV ICT 1 at Chamba

NHPC/ POWERGRID

1-Jun-17 18:24 01-Jun-17 19:36 1:12

400 kV Bus Bar protection was operated for Bus-1 of Chamba station. Resulting in tripping of 315MVA ICT-I, 400 kV Chamba-Chamera ckt-2 and 400 kV Chamba-Jalandhar ckt-1. Whereas from PMU, no significant fault observed.

GI2Y

(POWERGRID)

Y(POWERG

RID)

Y(POWERG

RID)

No fault observed

2 NR 1.400kV Banda-Rewa Road ckt-1&22.400/220kV 315MVA ICT-1 at Banda(UP)

Uttar Pradesh 3-Jun-17 12:19 03-Jun-17 15:29 3:10400kV Banda-Rewa Road ckt 1&2 along with ICT-1 of Banda tripped on R-phase to ground fault at 12:19hrs. As per PMU, Maximum dip observed in R-phase.

GI2 Y Y Y 80ms

3 NR

1.400kV Patiala-Patran ckt-1&2 2.Patiala-Nalagarh ckt-1 3.Patiala-Panchkula ckt-1&24.400kV Bus Reactor at Patiala

POWERGRID/ Patran

Transmission Company Limited

7-Jun-17 1:06 07-Jun-17 1:26 0:20

At 01:06hrs, Yellow-phase jumper of 400 kV Patiala-Patran ckt -2 snapped from the jack bus and created bus fault with Blue-phase of Bus-1.From PMU, sharp dip observed in Yellow and Blue phase. Patiala station has charged the lines without taking code from NRLDC.

GI2 Y Y Y 80ms

4 NR 1.400kV Sonipat-Kurukshetra ckt 1 & 2 2.400kV Sonipat-Bahadurgarh 2

POWERGRID 13-Jun-17 22:06 13-Jun-17 22:19 0:13

Due to storm in Haryana, Multiple lines tripped on phase to earth fault in Haryana control area nearby Sonipat. From PMU and SoE, multiple faults observed in between 22:06 to 22:18 hrs.

GI2 Y Y YNo fault

observed

5 NR 1.400kV Rewa Road - Panki ckt 2.400kV Rewa Road - Banda ckt-2

Uttar Pradesh 16-Jun-17 16:56 16-Jun-17 18:32 1:36

Multiple lines tripped on Y phase to earth fault in UP nearby Banda, Rewa Road and Panki.From PMU, multiple faults observed inbetween 16:56hrs to 16:57hrs.

GI2 Y Y Y 80ms

6 NR 1.400kV Ratangarh-Suratgarh ckt-12. 315 MVA 400/220kV ICT 2 at Ratangarh

Rajasthan 17-Jun-17 16:17 18-Jun-17 12:53 20:10Ratangarh 315 MVA ICT-2 tripped on over pressure (Pressure Relief Device) along with 400kV Ratangarh-Suratgarh ckt-1.From PMU no fault signature observed.

GI2 Y Y YNo fault

observed

7 NR 1. 400kV Rajpura-Dhuri ckt-2 2. 500MVA 400/220kV ICT-3 at Rajpura

PUNJAB 18-Jun-17 7:02 18-Jun-17 21:40 14:38

500MVA ICT 3 of Rajpura tripped on Differential and Buchholz. Along with that, 400kV Rajpura-Dhurickt-2 was also tripped. From PMU, Max dip in Blue phase and the fault clearing time was approx 80msec.

GI2 Y Y Y 80ms

8 NR

1.400kV Jhatikara-Bamnauli ckt-2 2.500MVA 400/220kV ICT-2 and 3 at Bamnauli 3.220kV Bamnauli-Dwarka1 ckt-1&2

Delhi 18-Jun-17 17:49 18-Jun-17 22:25 4:36

400kV Jhatikara-Bamnauli-2 tripped on phase to phase fault (Yellow-Blue) at a distance of 10km from Jhatikara end. Since 400kV Bus split at Bamnauli, 500MVA ICT-2 & 3 were radial. Hence along with line, 500MVA ICT-2 &3 also tripped.From PMU, Max dip observed in Yellow and Blue phase, whereas fault clearing time was approx 500msec.

GD1 Y Y Y 520ms

9 NR

1.400kV Merta-Heerapura ckt2.400kV Merta-Shree Cement ckt3.400kV Merta-Kota ckt4.315MVA ICT 1,2,&3 at Ratangarh

Rajasthan 21-Jun-17 2:22 18-Jun-17 21:40 19:18

Due to thunderstorm, at 02:22hrs multiple lines eminating from 400kV Merta tripped on over voltage. Further, at 04:42hrs Ratangarh's ICT 1, 2, &3 were also tripped. From PMU, over voltage tripping observed within 3 sec, whereas no fault signature observed at 04:42hrs.

GI2 Y Y YNo fault

observed

10 NR

1.765kV Fatehabad-Lalitpur ckt-12.765kV Fatehabad-Lalitpur ckt-23.660MW Unit #2 of Lalitpur TPS4.660MW Unit #3 of Lalitpur TPS

Uttar Pradesh 21-Jun-17 14:14 21-Jun-17 18:11 3:57

At 14:14:11hrs 765kV Fatehabad-Lalitpur ckt-2 tripped on zone 1 protection, 765kV Fatehabad-Lalitpur ckt-1 also tripped on Zone-1 protection after 10sec. Due to loss of major evacuation path, SPS operated. Resulted into loss of 800MW geneation on tripping of Lalitpur TPS units 2 & 3.

GD1 Y Y Y 160ms

11 NR 1. 400kV Dadri-Panipat ckt-12. 400kV Dadri Bus-1

NTPC/ POWERGRID

22-Jun-17 20:37 23-Jun-17 17:56 21:00

Bus bar protection operated at 400/220kV Dadri NTPC station leads to tripping of 400kV Dadri-Panipat1 line.From PMU, No fault signature observed. The same type of tripping had happened at 400kV Dadri NTPC on 01-06-2017 at 04:28hrs also.

GI2 Y (NTPC) Y YNo fault

observed

12 NR 1.400kV Agra(PG)-Fatehabad ckt2.400kV Fatehabad-Mathura ckt

Uttar Pradesh/ POWERGRID

24-Jun-17 20:04 24-Jun-17 20:26 0:22

Agra(UP)-Fatehabad 765 (UP) ckt-2 was under planned shutdown, at 20:04hrs 400kV Agra(PG)-Fatehabad and 400kV Fatehabad-Mathura lines tripped, resulted in overloading of 400kV Agra(UP)-Fatehabad ckt-1 (1400MW).From PMU, two severe dips observed in Blue-phase. Along with that, damped osillations were also observed in Agra PMU after tripping of both the lines.

GD1 Y (PG) Y (PG) Y 80ms

Revival Event(As reported)

Major Grid Events for June, 2017_Northern Region Preliminary Report DR/EL Detailed Report Fault

Clearance time

Category as per CEA Grid Standards

S.No.Region Name of Elements(Tripped/Manually opened)

Owner / AgencyOutage

Annexure-VII

Outage Duratio

Date Time Date Time Time within 24hrs

after 24hrs

Not Received

within 24hrs

after 24hrs

Not Received

ReceivedNot

Received

Revival Event(As reported)

Major Grid Events for June, 2017_Northern Region Preliminary Report DR/EL Detailed Report Fault

Clearance time

Category as per CEA Grid Standards

S.No.Region Name of Elements(Tripped/Manually opened)

Owner / AgencyOutage

13 NR 1.220kV Chittorgarh-RAPS (NPCIL) ckt-1 2.220kV Chittorgarh-RAPS (NPCIL) ckt-2

Rajasthan/ NPCIL 26-Jun-17 17:10 26-Jun-17 17:44 0:34

220kV Chittorgarh-RAPS (NPCIL) ckt 1 & 2 tripped on earth fault.From PMU, max dip observed in Yellow-phase and auto reclosure was unsucessful.

GI1Y

(Rajasthan)

Y Y 80ms

14 NR

1.400/220 kV ICT-I & 2 at Kaithal2.400/220 kV ICT-1& 2 at Kirori 3.220kV Khedar-Kirori ckt 1 &24.220kV Kirori-Jind ckt 1 &25.220 kV PTPS -Jind 1 &2 6.220 kV PTPS safidon 1,2 & 3 7.220kV Jind-safidon 1&28.220 kV Narwana Bata 1 &2 9.220 kV Hissar Narwana 10.220 kV Sofoda Mund 1 &2 11.220 kV Kaithal(PGCIL) Kaithal1 &2 12.220 kV Kaithal(PGCIL) Chika 1 &2

Haryana/ POWERGRID

27-Jun-17 0:15 27-Jun-17 0:50 0:35

Multiple 220kV lines tripped in Haryana control area nearby Kirori, Jind, Safidon, Kaithal, Cheeka, Mund etc along with 400/220kV ICTs at Kirori (HVPNL) and Kaithal (PG) station.

From PMU, no significant fault signature observed. But, sudden votage rise observed.

GD1 Y (PG) Y (PG) YNo fault

observed

15 NR 1.400kV Mukatsar-Talwandi Sabo ckt-2 2.400kV Makhu-Mukatsar ckt-2

Punjab 27-Jun-17 15:50 27-Jun-17 17:07 1:17

400kV Mukatsar-Talwandi Sabo ckt-2 and Makhu-Mukatsar ckt-2 tripped on earth fault.

From PMU, dip observed in all three phases

GI2 Y Y YNo fault

observed

16 NR

1. 132KV Sitarganj - PTCUL ckt-2 2. 220KV Sitarganj - Tankpur3. 220KV Sitarganj - CB Ganj4. Sitarganj - 220/132kV ICT-I

POWERGRID/ NHPC/ Uttar

Pradesh / Uttarakhand

30-Jun-17 8:55 30-Jun-17 10:55 2:00

As reported, 220kV Sitarganj - CB Ganj Line Jumper burnt leads to tripping of 132kV Sitarganj - PITCUL ckt-2,220kV Sitarganj - Tankpur, 220kV Sitarganj - CB Ganj and ICT-I of Sitarganj.

GD1 Y (PG) Y (NHPC) Y (NHPC) Y Y (NHPC) 1500ms

List of Operation Issues Adani PL. (i) Sh. Nirmal Sharma, VP (O&M), Fax- 0141-2292065 (ii) Sh. Sameer Ganju, Head-Northern Region, Fax No. 011-24115560 APCPL (i) AGM (O&M)-I, IGSTPP, Fax No. 01251-266326 (ii) AGM (EEMG), 01251-266326 BBMB (i) Director (PR) Fax- 0172-2652820 (ii) Power Controller, Fax- 0172-2653297. HVPNL Chief Engineer (Comm.); SE (SO & SLDC): 0181-2664440 Fax-0172-2560622 NHPC (i) Sh. Janardan Choudhary, E.D., Faridabad – Fax-0129-2272413 (ii) Sh. S P.Singh, Chief Engineer (O&M), Faridabad – Fax-0129-2272413 POWERGRID (i) Sh. Prabhakar singh, ED (NR-I), Fax No. 011-26853488 (ii) Sh. A.K. Arora, General Manager (O&M), NR-I, (iii) Sh. R.V.S Kushwaha, General Manager (O&M), Jammu; Fax- 0191-2471187 (iv) Sh.Rajeev Sudan Dy, General Manager (OS), Fax- 0191-2471187 RRVUNL Sh. P.S Arya, Chief Engineer (PPMC & IT), ) Fax- 0141-2740006 NTPC (i) Head of OS/ Head of RCC, Fax No. 0120-2410082 (ii) Sh. Praveen Chaturvedi, GM (OS), NRHQ Lucknow; Fax-0522-2305849. HPSEBL (i) Sh Suneel Grover, Chief Engineer (SO &P), Fax No. 0177-2653656 (ii) Sh. Deepak Uppal, SE (PR& ALDC): Fax-0177-2837143 (iii) Sh. Joginder Singh. Power Controller, Fax No. 0177-2837143. NRLDC General Manager - 26854861, 4051, 26569504 Fax- 26852747 NLDC General Manager, NLDC, Fax: 011-26853488/26601079 Lanco APTL Sh. Raj Kumar Roy, Director, Fax: 0124-2341627/4741024 SJVNL/NJHPS General Manager (C&SO), Fax- 0177-2673283 PTCUL/UPCL (i) Sh. Anupam Sharma, SE (SLDC), Fax- 0135-2451160, 0135-2763570 UPPTCL (i) Director (Op), Fax- 0522-2286476 (ii) Chief Engineer (SLDC), Fax- 0522-2287880, 2288736 HPLDS (i) Sh. N.P.sharma, SE, SLDC, Fax: 0177-2837649 (ii) Sh. Lokesh Thakur, Executive engineer, Fax: 0177-2837649 DTL General Manager (SLDC)/ General Manager (Protection) Fax-23236462, 23221069 THDCIL Sh. U.C Kannaujia, AGM (EMD), Tehri, Fax- 0135-2438682 PSTCL (i) Sh. S.S.Mal, Chief Engineer (SLDC) Fax – 0175-2365340 (ii) Sh D.P.Sethi, Dy.Chief Engineer (SLDC) Fax – 0175-2365340 CHANDIGARH Sh. M.P.Singh, SE (Elect. Op.Circle) – Fax-0172-2740505 IPGCL/PPCL (i) Sh. Y.P.Arora,GM (T), IPGCL, New Delhi, Fax- 23370884 (ii) Sh. R.K.Yadav, DGM (T), IPGCL, New Delhi, Fax- 23370884 BRPL Sh. Satinder Sondhi, VP & Head System Operations, Fax No. 011-39996549 Everest PPL Sh. Yogendra Kumar, Chief Operating Officer, Fax No. 011-45823862/ 43852507 RPSCL Sh. Niranjan Jena, Addl.VP/ Sh. Suvendu Dey, Asst. VP-O&M, Fax: 05842-300003 HPGCL Sh. S.K. Wadhwa SE/Technical(HQ), Fax: 0172-5022436

From organizations which are yet to submit revised nominations

Uttar Haryana Bijli Vitaran Nigam Ltd. Jodhpur Vidyut Vitran Nigam Ltd. Dakshinanchal Vidyut Vitaran Nigam Ltd.

HPPTCL Director (Planning & Contracts), Fax: 0177-2626284 J&K (PDD) Chief Engineer (Survey & Commercial) Fax-0191-2476213 J&K SPDCL GM, Fax: 0194-2500145 PSPCL Engineer-in- Chief (PPRR), Fax- 0175-2308698. RRVPNL Chief Engineer (LD); SE (SO&LD) – Fax- 0141-2740920 UPRVUNL DGM (TOM), 0522-2287861 UJVNL General Manager Engineering: 0135-2761485, fax- 0135-2761549 CEA Director, (GM-I), Fax- 26170385, 26108834 Chief Engineer, NPC NPCIL (i) Station Director, NAPS; Fax. 05734-222177.(ii) Sr. Manager (Transmission),

NPCILFax.-022-25563350 JPPVL Sh. Suresh Chandra, Director, Fax- 0120-4516201/4609464/4609496 Jhajjar PL Sh. Goutam Biswas, GM (Production), 01251-270155.

New Members for the year 2016-17 (Nominations not received)