18-ए,शहीद जीत �सह मागर, कटवा�रया सराय, नई �दल्ी- 110016 फोन:011-26967842 फेकस: 011-26865206 ई-मे्: seo-nrpc@nic.in वेबसाईट: www.nrpc.gov.in 18-A, Shaheed Jeet Singh Marg, Katwaria Sarai, New Delhi-110016 Phone: 011-26967842 Fax: 011-26865206 e- mail: seo-nrpc@nic.in Website: www.nrpc.gov.in

भारत सरकार Government of India

िव�ुत मं�ा्य Ministry of Power

उ�र के�ीय िव�ुत सिमित Northern Regional Power Committee

No: NRPC/OPR/106/01/2018/3088-3128 Dated: 01.03.2018 िवषय: - उ�र के�ीय िव�ुत सिमित क� �चा्न समनवय उप-सिमित क� 144 व� बैठक का कायरववत I उ�र क�ेीय िव�तु सिमित क� �चा्न समनवय उप-सिमित क� 144व� बैठक 21.2.2018 व 22.2.2018 को आयोिजत क� गयी थी। उ� बैठक का कायरवव� उ�र क�ेीय िव�तु सिमित क� वेबसाइट http://www.nrpc.gov.in पर उप्ब् ह।ै य�द कायरववत पर कोई �टपपपी हो तो कायरववत जारी करन ेके एक स�ाह के अनदर द ेसकते ह� I सं्�: उपयर�

-sd-

(उपेन् कुमार) अ्ीकप अिभयंता( �चा्न)

सेवा म�, �चा्न समनवय उप-सिमित के सदसय

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भारत सरकार Government of India

िव�ुत मं�ा्य Ministry of Power

उ�र के�ीय िव�ुत सिमित Northern Regional Power Committee

No: NRPC/OPR/106/01/2018/3088-3128 Dated: 01.03.2018 Subject: - Minutes of 144th OCC meeting of NRPC. 144th meeting of the Operation Co-ordination Sub-Committee of NRPC was held on 21.2.2018& 22.2.2018. The Minutes of this meeting have been up-loaded on the NRPC web-site http://www.nrpc.gov.in. Any comments on the minutes may kindly be submitted within a week of issuance of the minutes. Encls: As above.

-Sd-

(Upendra Kumar)

Superintending Engineer (Operation)

To, Members of OCC

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Minutes of the 144th Meeting of the Operation Coordination Sub-Committee (OCC) of NRPC held on 21.2.2018& 22.2.2018 at NRPC Secretariat, New Delhi.

144th Meeting Operation Coordination Sub Committee (OCC) of NRPC was held on 22.2.2018 at NRPC Secretariat, New Delhi. The list of participants is attached at Annexure-A

MS, NRPC welcomed all the participants to the 144th OCC meeting. He said in his

opening remarks that:

1. The OCC meeting held on 21.02.2018 for approving the outages was a marathon meeting. But despite of numerous outages being approved in the OCC meetings, number of requests for outages is received from time to time after the meeting. This is a matter of concern because if the nature of these outages is not an emergency, then proper planning is required by utilities for timely approval in the OCC meeting. He added that a scientific method for approving outages needs to be planned as the availability is highly affected by the frequent outages. He requested that efforts should be made by utilities to co-ordinate the outages among themselves. He further observed with new Highways, Railways and METRO networks coming up, numbers of outages have increased. Moreover, the end of the financial year also results in increasing the number of outages by utilities. He added that any additional outages need to be approved, should be discussed in the current session.

2. He informed the house that Hon’ble Supreme Court is monitoring the installation of FGD by the thermal plants as per the approved phasing plan. He informed that the quarterly status regarding the progress in installation of FGD need to be submitted by Thermal Power Plants. He requested all concerned to take expeditious action in this regard. He stated that the utilities are requested to furnish the status online once the NRPC portal becomes live. He also intimated that the incentive scheme for installation of FGD is also being looked into and accordingly an Agenda item for discussion is there in the meeting.

3. Further he added that it was well conversant to all that as per CERC guidelines the Technical Minimum at 55% has been already approved for ISGS units. He added that Member Thermal had lately held a meeting to review the possibility of the Generating units in Thermal power plants going to levels of 50% , 40% and 25%. These levels can be attained by implementing measures recommended in the Task Force Committee report on Flexibilisation of Thermal Power plants. He added that the changes required in the machines for 40% will be looked at first and then 25% stage where major overhauling will be required till then 55% level should be in place for all thermal plants. He informed that 6 units had been selected to operate at 55% Technical minimum which includes Dadri & Simhadri of NTPC. He added that not only ISGS but the states should also evaluate the possibility of the thermal generators in their states which can run at 55 % technical minimum. He added that efforts should be made to address the issues being faced by them for doing needful as it will improve the grid conditions as a whole.

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4. He added that for finalizing the LGBR from the current year the monsoon deficit and surplus conditions are to be considered along with the Normal monsoon conditions which will result in better planning of Load scenario and the Anticipated and Actual availability will be more accurate. He requested all the utilities to submit the details accordingly.

5. He concluded that TCC/NRPC is scheduled to be held on 27/28.2.18 and any issue need to be discussed at that level may be brought forth by all the utilities.

1 Confirmation of Minutes:

The minutes of the 143rd OCC meeting held on 17.1.2018 and 18.1.2018 at New Delhi were issued vide letter of even number dated 29.1.2018. Since no comments on the minutes were received, the Sub-committee confirmed the Minutes.

2 Review of Grid operations of last month (January 2018):

2.1 Anticipated vis-à-vis Actual Power Supply Position (Provisional) for January,

2018. Sub Committee was informed that there was vide variations (i.e. > 5.0%) in the Anticipated vis-à-vis Actual Power Supply Position (Provisional) for the month of January , 2018 in terms of Energy requirement for Delhi, Punjab & UP and in the terms of Peak demand for Delhi, Punjab, Rajasthan & UP.

PSTCL representative intimated that the variation in terms of Peak demand and Energy requirement was on account of the fact that the Agriculture Power demand was more and there were no rains in Punjab.

UP representative informed that the reason for variation in actual and projected availability and demand in the month of January 2018 were:

• During the month of January2018 winter was quite moderate, and day temperature was higher than usual hence total energy requirement and peak MW requirement was less.

• Availability of power was less due to coal shortage at Bara and Lalitpur TPS and outage of generating units at Anpara TPS. Also, schedule from CGS was less as compared to last year which may be due to lower water availability at Hydro Generating Stations.

Rajasthan representative stated that variation in demand and energy requirement is due to the bi-election and agriculture load in Rajasthan.

SE(C), NRPC stated that the variations in Availability & Actual demand in the case of Delhi was apparently due to the fact that the availability includes the total Potential of the state whereas as Actual availability is the actual load met. NRLDC representative expressed his opinion that fine tuning of the figures needs to be done. UP representative stated that for better clarity the Availability, Anticipated Demand and the

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load met should be considered MS NRPC observed that the efforts will be made to correct the format for giving a clearer picture.

The Sub-Committee requested all SLDCs 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.

2.2 Power Supply Position for NCR: The Sub-Committee was informed that the 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 December, 2017 is placed on NRPC website.

Members were requested to furnish the data on regular and time bound manner.

3 Maintenance Programme of Generating Units and Transmission Lines:

3.1. Maintenance Programme for Generating Units.

The maintenance programme for Generating Units for the month of March 2018 was discussed 21.2.2018 at NRPC Secretariat, New Delhi. The approved outages of generating units as per deliberations in OCC has been issued vide letter of even no. dated 23.2.2018. _____20.12.2017________

3.2. Outage Programme for Transmission Elements.

The Outage programme of transmission assets for the month of February 2018 was discussed on 21.2.2018 at NRPC Secretariat, New Delhi. The approved/deferred outages of transmission assets as per deliberations in OCC has been issued vide letter of even no. dated 23.2.2018.

GM NRLDC stated in the meeting that for better clarity of discussions in the outage planning meeting representative of all the three RHQ of NR POWERGRID should be present in person from next meeting onwards.

4 Planning of Grid Operation

4.1 Anticipated Power Supply Position in Northern Region during March, 2018 as per LGBR for 2017-18:

Anticipated Power Supply Position in Northern Region during March, 2018 (Enclosed at Annexure - Agenda Item 4) was discussed. SLDCs were requested to update the estimated PSP & submit measures proposed to be taken to bridge the gap in demand and availability, as well as dispose of the surplus, if any.

SE(C) NRPC stated that it has been observed that while submitting the Power Supply Position every month, the SLDC s do not give reasons for the variation in the data from the same month last year. He added that the Power Supply Position is monitored by the Ministry and the vide variation if any are enquired by them.

He further added that the CEA GM division has sought confirmation regarding the way in which the Power Supply position is being worked out. He stated that the Power supply position should be considered by adding the drawl at the meters installed on the ISTS drawl points and the Ex-bus generation of the state bought at bar on the

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boundary. He added that all utilities need to confirm regarding the procedure being followed and also the fact that ISTS losses are not being taken into account. HP & Delhi representative confirmed that the procedure is being followed by their states.

5 Information about variable charges of all the generating units in the Region:

Sub-Committee was informed that the information of variable charges for different generating units is available on the Merit Order Portal. All utilities were requested to ensure that the process of Scheduling was done as per Merit Order Dispatch and in case of variations the same should be informed along with the reasons for the same.

6. Study by POWERGRID for reactive compensation at 220 kV level and above:

Status of reactive compensation at 220 kV level & above:

37th TCC/40th NRPC meeting approved following elements:

I) TCR of capacity 500 MVAr at Kurukshetra 400 kV bus. II) Bus Reactors at the following 30 no. 220 kV sub-stations and 18 no 400 kV level

sub- stations subject to the availability of space. It was also agreed that these reactors shall be provided by the owner of the substations:

Sl.No. Bus Name State Reactors

Proposed(MVAr) Implementing

agency STATUS

220Kv 1 Jind(PG) Haryana 25 PG 2 Fatehabad(PG) Haryana 25 PG 3 Kishenpur(PG) J&K 25 PG 4 Jalandhar(PG) Punjab 2X25 PG 5 Nakodar Punjab 25 PSTCL FEB

2020 6 Amritsar(PG) Punjab 25 PG 7 Dhuri Punjab 25 PSTCL 8 Akal Rajasthan 25 RVPNL 9 Suratgarh Rajasthan 2X25 RVPNL 10 Bikaner Rajasthan 2X25 RVPNL 11 Barmer Rajasthan 25 RVPNL 12 Narela Delhi 25 DTL 13 R.K.Puram-I Delhi 25 DTL 14 Patparganj 2 Delhi 2X25 DTL 15 Maharanibagh Delhi 2X25 DTL 16 Bamnoli Delhi 25 DTL 17 SabjiMandi Delhi 2X25 DTL 18 Gopalpur Delhi 2X25 DTL 19 Indraprastha Delhi 2X25 DTL 20 Geeta Colony Delhi 2X25 DTL 21 Harsh Vihar Delhi 2X25 DTL

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22 Wazirabad Delhi 2X25 DTL 23 Electric Lane Delhi 2X25 DTL 24 Mandola Delhi 25 DTL 25 AIIMS Delhi 2X25 DTL 26 SaritaVihar Delhi 25 DTL 27 Bawana Delhi 25 DTL 28 PreetVihar Delhi 25 DTL 29 Mundka Delhi 25 DTL 30 Masjid Moth Delhi 25 DTL

400kV 1 Maharanibagh(PG) Delhi 125 PG 2 Mundka Delhi 125 DTL 3 Mandola(PG) Delhi 125 PG 4 Hissar(PG) Haryana 125 PG 5 Kala Amb(TBCB) Himanchal 125 TBCB 6 Chamera Pooling

Stn.(PG) Himanchal 125 PG

7 Kishenpur(PG) J&K 125 PG 8 Nakodar Punjab 125 PSTCL FEB 2020 9 Jullandhar(PG) Punjab 125 PG 10 Moga(PG) Punjab 125 PG 11 Dhuri Punjab 125 PSTCL FEB 2020 12 Patiala(PG) Punjab 125 PG 13 Jodhpur Rajasthan 125 RRVPNL 14 Sikar(PG) Rajasthan 125 PG 15 Allahabad(PG) U.P 125 PG 16 Meerut(PG) U.P 125 PG 17 Kashipur Uttarakhand 125 PTCUL 18 Srinagar Uttarakhand 80 PTCUL

In 37th TCC/40th NRPC meeting, POWERGRID was requested to commission TCR of capacity 500 MVAr at Kurukshetra 400 kV bus at the earliest citing the stabilization of Champa-Kurukshetra HVDC link. 40th NRPC had also advised all the utilities to commission the reactors at the earliest and to submit the detailed action plan with the timeline. NRPC had further pointed that these reactors are essential for maintaining the voltage level of the grid and needs to be commissioned within 26 months. 141st OCC meeting:- POWERGRID informed that 500 MVAr TCR at Kurukshetra would be commissioned within 30 months. NTPC informed that 125 MVAr Bus reactor at Dadri would be commissioned by February 2018 and was delayed on account of problems being faced at site in laying the foundation of the bus reactor as water logging problem is persisting.

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142nd OCC meeting:-

Concerned utilities were again requested to furnish the action plan along with the timeline and the status of action taken for the installation of reactors by 31.12.2017.

143rd OCC meeting:-

• PSTCL submitted the plan. • Delhi representative assured that the same will be submitted once it is finalized by

their standing committee. • POWERGRID representative intimated that the planning department is looking into

the same. • MS, NRPC requested all other concerned utilities to submit the detailed action plan at

the earliest.

144th OCC meeting:-

All utilities (except PSTCL) were requested again to furnish the definite action plan along with the timeline and the status of action taken for the installation of reactors.

Power grid representative were requested to give a definite plan for the installation of the reactors.

DTL representative intimated that they are finalizing to install the reators at 6 of the sub stations ie Maharanibagh, Electric Lane, Harsh Vihar, Mundka (All 220 KV ) & Mundka (400KV) in the first phase tentatively by early 2020.

Rajasthan representative intimated that 525MVAR (450MVAR PLUS 75MVAR) have been approved by WTD of RVPN and being proposed for PSDF funding. (The detailed status is enclosed at Agenda item no 6: Annexure 6)

PTCUL representative intimated that the DPR has been finalized.

7. System Study for Capacitor Requirement in NR for the year 2017-18 & 2019-20:

In the 37th NRPC meeting the proposal for entrusting the work of System Studies for the year 2016-17 and 2017-18 to CPRI was approved and accordingly a Letter of Award (LoA) was issued to CPRI for carrying out the studies with consultancy charges of Rs. 20 Lakh plus Service tax after the approval of Chairperson, NRPC. Due to delay in data submission by the utilities for the period of FY 2016-17 it was decided to conduct the studies for 2017-18 and 2018-19.

CPRI has submitted the report for capacitor requirement for 2017-18 and according to the outcomes of the study conducted by CPRI 39th NRPC approved the proposal of installation of capacitor by Haryana, Punjab and Uttar Pradesh as proposed by the respective States for funding through PSDF. NRPC also approved that installation of capacitor in J&K limited to 1102 MVAR (as per study of CPRI).

For study of the period 2017-18:-

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139th OCC meeting:-

Representative of UP had some reservations regarding the quantum of capacitor bank under operation and that being reflected in the report submitted by CPRI. It was informed that, the figure mentioned in the report was 1367.2 MVAR, however, it was somewhere in the range of 5000 MVAR operational in their system.

Representative of CPRI in the meeting assured rechecking the data incorporated in their study. He further informed that, during the study, help of power maps available on UPSLDC’s website was also taken as it was not possible to trace the details of upstream substation for the capacitor submitted at 11kV and 33 kV level.

In the meeting the issue of identifying the 11kV and 33kV feeders corresponding to the recommendation of CPRI for capacitor installation (recommendation made at 220kV and 132kV substation by lumping the downstream network) was also discussed. It was opined that, for a radial system the requirement as recommended can be more or less equally distributed among the downstream feeders. However, for a connected system it would not be possible.

For the study of capacitor requirement for 2018-19, it was proposed to conduct the study at 11kV/33kV level in order to obtain more feasible and practical requirement of capacitors in case the system at 220/132/66kV was not radial. However, if the system is radial, then the requirement of capacitors assessed by the CPRI may be proportionately translated upto 11kV level. States informed that most of the system is radial. Therefore capacitors study could be done as per original proposal of CPRI for 2018-19 also.

140th OCC meeting:-

In the meeting representative of UP (SLDC) again raised the issue of the quantum of capacitor banks incorporated in the study by CPRI. EE (O), NRPC intimated that the comments of UP has already been sent to CPRI and further suggested that the utilities could also take up the issue directly with the concerned personnel in CPRI (Dr. Manohar Singh, Mob No.– 9632940855, E-mail: manoharsingh@cpri.in ).

Regarding the study of capacitor requirement for 2018-19, they plan to conduct their own study for assessing the capacitor requirement considers actual data of power factor and MVAR injection of load at the 33 kV level and other factors such as generator directly connected at 33 kV voltage level etc. In addition to above mentioned installed capacitor banks 439.39 MVAR (81Nos. X 5.43MVAR) more Capacitor banks are already under installation.

142nd OCC meeting:-

All the Utilities were requested to submit the action plan for the installation of the capacitor banks as per the outcome of the study conducted by CPRI by 31.12.2017.

143rd& 144th OCC meetings:- PSDF representative in the meeting stated that one no proposal from J&K, 2 nos from Rajasthan, 2 nos from Haryana and 7 nos from UP are pending in their office for want of the reply to the clarifications asked regarding location,capicitors already installed/ working voltage profile, etc.

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MS NRPC requested that all the utilities should make all out efforts in giving the complete reply to the queries raised so that further necessary action can be taken up by PSDF.

Rajasthan representative stated that the Shunt capacitor requirement for Rajasthan as per the CPRI report was Nil but they have planned 81nos & 5.43 MVAR shunt capacitors out of which 74NOS x 5.43 MVAR have already been commissioned.

37th TCC/40th NRPC meeting:- For study of the period 2019-20:

The issue of study for 2018-19 was discussed in the 37th TCC/40th NRPC meeting. In the meeting it was proposed to conduct the study in two stages:

i. One at 220/132 kV level

ii. Subsequently down to 66/33/11 kV level As it would involve a huge task of collection of data it was also agreed to conduct the study of capacitor requirement for 2019-20 in place of 2018-19.

NRPC approved the proposal for conducting the study of capacitor requirement for 2019-20 at 11kV/33kV/66kV level and also for the additional charges which may be levied by CPRI for conducting the study to be paid from NRPC fund.

141st OCC meeting: -

Members were briefed about the decision of NRPC for conducting the study for 2019-20 at 11/33/66 kV level. All the utilities were requested to timely submit the data for their network for successfully conducting the study.

142nd OCC meeting &143rd OCC meeting:-

It was intimated that the NRPC Secretariat is in the process of getting the proposal from CPRI for the additional scope of work as approved by the 40th NRPC.

CPRI has submitted its revised offer (Annexure- Agenda item No. 7) and has quoted consultancy charges of Rs. 55,00,000/- for the study for 2019-20 in addition to Rs. 10,00,000/- which is to be paid for the study conducted for the period 2017-18. For the study for 2019-20, the cost as proposed by CPRI seems to be on very higher side and also there is no such requirement for study of capacitor installation submitted by any of the utility. The responsibilities of the NRPC as per the offer will be as under:

NRPC shall identify one officer to provide all data regarding the studies and other data as and when required and sought by CPRI in the PSSE format requirement for the assessment of capacitor requirementsIt is complete responsibility of NRPC to collect all necessary data from transmission/ distribution utilities in CPRI / NRPC finalized data.

NRPC shall provide the peak load PSSE operational file from NLDC.

Rajasthan representative stated that as regard the study of capacitor requirementfor 2018-19, Rajasthan have planned to conduct their own study for assessing

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the capacitor requirement considering actual data of power factor and MVAR injection of load at the 33KV level.

MS NRPC stated that the matter regarding the proposal submitted by CPRI is being discussed at length and efforts would be made to negotiate failing which the tendering process can also be reviewed.

Further, he stated that the proposals pending with PSDF of UP, Rajasthan, J&K,Haryana and Punjab may be got expedited by clarifying the issues raised by them like the voltage profile, capacitors already installed, the locations at which the are to be installed.

Director NPC present in the meeting also requested all utilities to take expeditious action regarding the finalization of the schemes submitted by clarifying the issues raised by their office.

8. hase nomenclature mismatch issue with BBMB and interconnected stations:

During discussions held in 34th PSC meeting, it was reported that the phases of BBMB at the interconnection with other utilities, do not match. It was observed that while charging of interconnected lines, it may lead to confusing situation and also other coordination problem while reporting issues. The main issue was primarily of the nomenclature of phases at BBMB end. BBMB was asked to rectify the same.

140th OCC meeting: The representative of BBMB informed that a Committee has been constituted by TS wing of the BBMB.

BBMB submitted the report of the Committee providing the details of the prevailing conditions at respective ends of BBMB and other utilities connected to them. The present situation as stated in the report is as given below:

Phase of the grid Corresponding nomenclature of the phase at BBMB end

R Phase B Phase

Y Phase R Phase

B Phase Y Phase 142nd OCC meeting:

SE (O), NRPC stated that the findings of the report details only about the prevailing conditions at the interconnection points and does not mention any remedial action for rectifying the same.

Representative of BBMB stated that the issue involved was only of the nomenclature of phases which would not lead to any technical problem. Various problems would be faced, in order to change the nomenclature (color coding, ferruling etc.) in the already established infrastructure.

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Citing the coordination and other operational problems because of this mismatch of nomenclature, BBMB was directed to widely circulate the findings of the report to all their interconnected utilities. BBMB was also directed to display the phase nomenclature of BBMB and their corresponding phases in the grid at their Switchyard and Control Room. Also they were advised that while reporting any issue, the phase nomenclature of the grid and that of BBMB shall be clearly mentioned in order to avoid any misinterpretation. 143rd OCC meeting:

MS, NRPC expressed concern on the seriousness of the issue. He emphasized the need to correct the mismatch by BBMB. He stated that if not corrected, this mismatch may lead to a big problem in the grid. He proposed that an expert committee shall be formed by BBMB to formulate an action plan for rectifying this issue in a phased manner without disturbing the associated elements.

144th OCC meeting:

BBMB representative proposed in the meeting that the issue should be discussed in the next Protection Sub Committee meeting as other utilities and Power grid will also be involved when the work of changing the nomenclature is taken up. MS NRPC stressed that the issue has to be resolved at the earliest preferably in the next six months. BBMB confirmed full cooperation in this regard.

9. Operation of hydro power projects in peaking mode:

POSOCO has carried out operational analysis of various hydro stations in the country and observed that despite 40.6 GW of peaking hydro capacity, only about 33 GW peak generations is carried out on all India basis. According to POSOCO, this is on account of a number of hydro stations, particularly in state sector, which are not being operated in peaking mode. In order to examine the above observation, a sub-Committee was constituted by the MoP under Chairperson, CEA with heads of POSOCO, NHPC, SJVN & THDC as member and Director (H), MoP as the member convener. The sub-committee has held three meetings with the concerned hydro generating stations and concluded that there is scope for about 2000 MW additional power generation from hydro stations during peak hours. Based on the deliberations at the meetings of the Committee, Chairperson, CEA has advised to discuss the above operational analysis & the matter of utilization of hydro stations in peaking mode be discussed at the monthly OCC meetings while discussing operational planning for the month ahead and analyzing the operation in the previous month.

All members were advised to go through the report on the https://posoco.in/hydro-committee-report/ and then submit their comments.

142nd OCC meeting The concerned utilities were once again requested to give their comments on the issue. NHPC representative submitted that Parbati-III Power Station has already given Peak support during monsoon period. However during lean period, Parbati-III is declaring

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its total energy for the day and scheduling is being done by NRLDC for one and half hour, each during morning and evening peak as per CERC order considering non availability of inflow of Parbati-II. It was further explained that NRLDC can schedule Parbati-III limited to the total declared energy, without affecting the PAF.

143rd OCC meeting: BBMB submitted their comments to CEA and POSOCO vide letter no 43-45/PCT 133 dated 04.01.2018), along with the power house wise hydraulic constraints. BBMB representative intimated that the constraints at Pong on account of the constraints at Mukerian are there which needs to be looked into by Punjab.

MS, NRPC requested BBMB representative to submit the details of their water coordination system.

Punjab representative intimated that they are already following up the issue and will submit comments at the earliest.

NRLDC representative requested NHPC of exploring the possibility of providing peaking support from Uri I & II also. NHPC representative assured that they have already instructed the concerned to review the possibility.

Representative of SJVNL informed that it was already providing peaking supports per the plant’s capability and there was no further scope available for the same.

144th OCC meeting: BBMB representative intimated that the details of the water conductor system of BSL project and Bhakra / Nangal Dam stand submitted. He intimated that PSPCL is taking action regarding the live encroachments on their reservoirs at Mukerian in coordination with the Irrigation department. PSPCL representative submitted a detailed reply regarding the constraints at Mukerian (Annexure- Agenda item no 9).He stated that the poundage comprising of 5 Power houses constructed on the Mukerian Project has 11500 cusecs capacity and against the same 1500-1600 cusec water is released during peaking hours resulting in spill over. MS NRPC stated that the spillover needs to be avoided. He proposed that the encroachments on the reservoir be looked into by de silting / checking of lining. It was proposed that the better coordination of BBMB. PSPCL & NRLDC is required so that the machine at Pong and Mukerian are synchronized for getting better peaking. PSPCL was also advised to take measures for live storage of water so that there is no spill over and the water released from Pong can be duly utilized. NRLDC representative observed that Punjab has to take the lead so that peaking can be obtained as the Generating units at Pong and Mukerian are in Tandem. NHPC representative intimated that they have taken up the matter regarding Uri I & II with J&K regarding the water flow from lower Jhelum but no response has been received. He stated that if water flow is adequate they will be able to give peaking early THDC representative intimated that both their units at Tehri & Koteshwar are operating in peaking mode

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SJVNL representative was requested to give a written confirmation that it was already providing peaking supports per the plant’s capability. . 10. Targets fixed for Load Relief from operation of df/dt & UFR relays in Haryana-review thereof (Agenda by Haryana)

Haryana has different loading pattern for different crop harvesting systems. Target load relief for the state of Haryana has been fixed as 2843 MW (UFR: 1243 MW,df/dt: 900 MW,SPS: 700 MW) at NRPC level. This target had been fixed by considering the maximum demand of 6725 MW in 2012-13 and making it applicable throughout the year. However, the same quantum was taken even for the off-peak Period when the state experiences average load of 2800-3500 MW for 6-months (i.e Jan-April & Nov-Dec) & min. load of around 2000-2300 MW.

However, the maximum load of State comes out during summer season and the target as stipulated above could only be achieved during peak summer season.

Clause 5.4.2(e) of IEGC mandates the arrangement of Interruptible load in 4 groups (excluding Un-interruptible load) in the following way:

1) Interruptible Load:-

(i) For Scheduled power cuts (ii) For un-scheduled cuts (ii) Essential load of Hospitals, Airport, Railways etc. is additional.

2) Uninterruptible Load:-

(i) Sanctioned Load of continuous process industries.

(ii) Essential load of Hospitals, Airport, and Railways etc. is additional.

It also mandates that there should be on overlapping between different groups of load.

Accordingly, by excluding un-interruptible load (Average running load of Continuous process Industrial load & substantial amount of airports, Railways & Hospitals load), targeted load relief of 2843 MW cannot be achieved during off-Peak period of 6 months (i.e Jan-April & Nov- Dec) in Haryana Control Area even by putting all the balance state under defense mechanism.

Haryana, therefore, requested to review the target fixed for UFR & df/dt keeping in view the off peak load of the State during November to April. 141st OCC meeting:-

SE (O), NRPC stated that the review of the load relief for all the states was very

essential keeping in view the request of HVPNL & PSTCL. He intimated that the data required for reviewing the target load relief had been received from all utilities except PTCUL.

PTCUL representative stated that the requisite data would be submitted at the earliest.

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142nd OCC meeting:- Representative of Uttarakhand SLDC informed that the concerned organization of

PTCUL was being regularly asked to provide the data however no response was obtained from their end.

EE (O), NRPC advised Uttarakhand SLDC to mark a copy of the letter to NRPC

while sending the same to concerned organization of PTCUL and if no response is obtained from their end the issue could be taken up directly at NRPC level. 143rd OCC meeting:-

PSTCL representative also expressed the concern of reviewing the Targets fixed

for Load Relief for operation of df/dt & UFR relays for the state of Punjab also. It was stated that the issue was brought up by them more than a year ago and the same is pending on account of the data pending from PTCUL.

PTCUL representative intimated that they were taking up the matter with the STU

regularly. MS NRPC expressed concern on the issue on non submission of the required details by PTCUL.

PTCUL representative, Er Amit Singh, Executive Engineer assured that the data

will be submitted at the earliest.

144th OCC meeting: MS NRPC intimated that the issue needs to be reviewed in light with the Agenda listed at No. 14 and upcoming of RES. He stated that the quantum of load relief for the UFR needs to be reviewed in light of the enhanced system and the coming up of RES. He informed the house that it is proposed to form a committee to look into the issue of reviewing the load relief and the slabs at which it operates. He requested all utilities to give the consolidated list of UFR & df/dt installed and the load relief they provide .Also he requested that the slabs at which it is operational should be intimated. He added that utilities should also intimate the details when these relays have operated last so as to ascertain their reasons of operation. BBMB representative intimated that recently the relays at Sangrur and Jamalpur had operated lately, the details of which they have submitted. NRLDC representative intimated that they will look into the reasons from the PMU data for the operation as the same can be due to malfunction or localized defects. DTL representative intimated that these relays at their end had operated successfully recently during the islanding that took place in the Delhi network on 21.02.2018. SE (O) stated that in present frequency profile scenario, the operation of UFR& df/dt due to frequency is most unlikely. MS NRPC stated that the issue will be deliberated regarding load relief and the frequency slabs by a committee to be constituted for the same and this agenda item will be merged with Agenda item 14. 11. Follow up of issues from previous OCC Ms – Status update

The updated status is enclosed at Annexure -Agenda Item 11.

12. Progress of installing new capacitors and repair of defective capacitors

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The up to date status of installation of new capacitors and revival of defective capacitor may be submitted by the State constituents in the format enclosed with the Agenda of the 143rd OCC meeting.

All utilities except UPPTCL & RRVPNL submitted the information & they were requested to do so regularly. UPPTCL & RRVPNL to submit the data.

13. Incentive to TPPs for early installation of pollution control equipment.

A. The list of FGD to be installed as finalized in the 37th TCC meeting is enclosed as Annexure 13 with the Agenda of the 144th OCC meeting.

MS NRPC requested all SLDCs present to take up with the concerned generating units where FGD is to be installed and intimate the progress on the issue. NTPC representative assured that the information of their units will be given positively in a week after arranging it from the Engineering wing who are monitoring the issue at All India level

B. The pollution control equipment needs to be installed in the existing TPPs as well as the thermal plants which are under construction. The, ESP up gradation/ FGD installation phasing plan stands finalized by the MOEF and intimated to all concerned. As per the phasing plan submitted by CEA, ESP up gradation/ FGD installation has been planned from the year 2018-2022. It is felt that incentivizing early installation of pollution control equipment will motivate the power generators to complete the requisite installation in time or ahead of schedule. In order to avoid disadvantage to power plants in MOD due to installation there is a need to balance their interest / incentive them. This will result in reduction of environmental pollution. This will be a temporary phenomenon till December 2022 by the time when all the TPPS would have installed pollution control equipment as per the phasing plan / directives of CPCB.

Members discussed on the following points:

• Priority in scheduling on environmentally complaint TPPs • Excise & Customs duty/GST may be exempted for pollution control equipment

like FGD etc. • Present limit of 30% equity to be met by plants to be relaxed to 10% , this will

enable plants to raise the fund comfortably and encourage for early installation of pollution control equipment.

• NCEF collected through coal cess may be utilized may be utilized for funding the utilities for installation of pollution control equipment.

• The amount of coal cess may be reduced for TPPs complying with new environmental norms.

MS NRPC highlighted that the issue of providing incentive to the generating units who install FGD first is being reviewed. He stated that when a plant installs FGD its variable cost will increase thereby getting it down on the MOD, hence resulting in running more of the polluted units. He stated that while scheduling, the units should be categorized into two parts & the units that are environmentally compliant should be

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scheduled first. He also stated that while considering MOD, it was proposed that till all the units are environmentally complaint the additional variable cost additional on account of FGD should not be taken into account. UP representative was apprehensive regarding the way by which the recovery of additional cost will be done. Also Rajasthan and UP representative stated that the scheduling of costly power will not be possible at their end as proposed above.

MS NRPC requested all utilities to give their comments on the incentive scheme so that consolidated information could be send to GM division of CEA.

SE(C) added that GM division has written to various concerned utilities for providing the information on the Format available on CEA website regarding the FGD installation.

Representative from CLP Jhajjar intimated that they have submitted the information.

Also it was intimated that another matter has been highlighted by CEA in which it has been intimated that the action plan regarding the FGD installation should be given as the same is being monitored by Supreme Court as stated by MS,NRPC in his opening remarks.

All SLDCs were requested to take up the issue with the concerned generating units. It was proposed that the concerned that the letters would be uploaded on website for necessary action to be initiated by SLDCs.

14. Automatic Under frequency Load shedding (AUFLS)

In the 7th Meeting of NPC it had been decided that there is a need to review of the quantum of load shedding without introduction of additional slabs/ stages of frequency. RPCs were required to deliberate on additional slabs of frequency as well as raising the set frequency for UFR operation and inform about the outcome

As discussed in Agenda ITEM NO 10

Additional Agenda

AA 1: Contingency Plan to Meet Deficient / Excess Rainfall during Monsoon

Chief Engineer, Grid Management, CEA vide letter dated 9th Feb,2018 has

requested RPCs to make contingency plan to meet deficient/excess rainfall during

monsoon. Copy of the letter is enclosed at Annexure – AA1.1. of the Agenda of the

meeting.

In the said letter, it is inter-alia mentioned that the impact (in terms of average

MW) of various contingencies on the demand and availability in respect of each State/UT

for the months of June to September,2018 may be estimated and an implementable action

plan be prepared for handling the contingency situations like deficit or delayed monsoon,

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flooding of mines or damaging of railway network or situation of high silt, tower collapse

etc. It is also mentioned that implementable concrete steps like identification of flexible

plant outages, maintaining sufficient Coal Stock at critical plant sites and diversion of

Coal via alternate route may also be identified and documented by each RPC.

SE (C) highlighted that while finalizing the LGBR only the case of normal rainfall

had been considered. He added that from now on the LGBR has to be prepared by taking

three scenarios: normal, deficit and surplus monsoon. He added that this will affect the

Hydro generators.

Ms NRPC added that a contingency plan had to be framed by all generators taking

the coal shortages, if expected, during the period of June to September. He also added that

the gas generators should also ensure gas supplies. He asked all generators to build up

sufficient coal stock levels, especially at critical stations before onset of peak summers.

NTPC representative stated that coal position for June –September cannot be

predicted at this point of time. However, he added that NTPC always try to build up coal

stock levels at its stations before onset of peak demand period. Domestic gas projections

are provided by GAIL only one week in advance and hence he added that its availability

can also not be predicated at this stage. However he informed the house that NTPC ties

up for RLNG on month to month basis and maintains maximum possible liquid fuel stock

level at its gas stations to meet any continent conditions.

SE (C) added that the hydro generators should take the high silt into consideration

while framing the contingency plan. NHPC representative added that they will take the

previous pattern in consideration while working out the present5 scenario.

Further, he added that the contingent plans by the states for the tower failure of

important lines may also be considered and measures that the state will take in such a

scenario should be detailed upon.

Haryana representative added that the period from March to October should be

considered instead of June to September for a clearer picture.

MS NRPC state that UP needs to improve the coal stock position in its generating

units. Also the issue of shifting of the planned maintenance in the LGBR in case of the

deficit monsoon was also highlighted. He also requested all the utilities to give the data

expeditiously and he add that the LGBR meeting will be planned for second week of

March.

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MOM of NRLDC AGENDA points

1. Over drawl by NR states and Frequency excursions at hourly boundaries

Deviation from schedule of all NR states for last 30 days is attached as Annexure-1 of the 144th OCC meeting.

NRLDC representative , stated that even after repeatedly being asked to follow their schedule in OCC meetings and through written communication, it is observed that most of the states are deviating from their schedule. All constituents were requested to provide reasons for such large and almost continued deviation from the schedule & remedial measures taken to arrest such deviations in future.

As a sample Grid frequency profile for 20.01.2018 is shown below.

It could be seen that almost at all hourly boundaries, there are frequency fluctuations. These are mainly due to large load changeover besides, the generation changes at these hourly boundaries. This issue is being debated since long, however practice of large load changeover is still continuing. Same was also communicated by NRLDC letter dated 22.01.2018 to all concerned. He added that to overcome above issue following actions have been suggested:

1. Avoiding large changes in load at some instances (staggering load connection/disconnection). 2. Good primary response from all generating stations during above time. 3.Manual actions at hydro stations to control generation at these hourly boundary i.e. by

reducing generation for around five minutes & increasing generation during next five minutes .

It is once again requested to advise all the concerned to take above actions so that such frequency fluctuations are effectively controlled. States should appraise their DISCOMs about this issue and a suitable action plan shall be formulated to avoid such frequency excursions.

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Further plot above shows that on 31.01.2018, frequency profile remained very poor. This was due to deviation from schedule by states (somewhat by NR states as shown in Annexure-1). Minimum frequency observed on 31.01.2018was 49.62Hz at 20:48 hrs while maximum frequency was 50.29Hz at 21:59hrs just after an hour. It can be observed from plots shown in Annexure-1 that some NR states where overdrawing prior to 21:00hrs and under drawing after 21:00hrs and hence contributing to poor frequency profile. States were requested to give proper explanation for the same & actions taken to avoid such instances in future.

He added that as has been pointed out in last OCC, Rajasthan is still reducing its load abruptly by ~600MW at 04:00hrs mark and increasing load by ~1000MW at 06:00hrs which leads to excursions in grid frequency. It has been communicated on no. of occasions & is also well known that all states shall try to increase/decrease load gradually especially at hourly boundary marks so as to avoid frequency excursions in the grid

NRLDC representative highlighted that in the last one month there has been lot of overdrawl hourly boundary excursions in the last one month predominately in Haryana & Rajasthan. He highlighted that on account of lunar eclipse on 21.1.18 there was wide variation in frequency in a very short duration. On account of this there was overdrawl at the time of low frequency and under drawl at time of high frequency. It was stated that this issue be taken into account at time of Forecasting.

NRLDC representative added that the Primary response from generators is not being received. MS NRPC stressed that all generating units and NRLDC should ensure that the FGMO is operational failing which the load on AGC will be there which will lead to heavy financial implications.

Further the issue of heavy over drawl and frequency devaitions by Rajasthan was also highlighted. Rajasthan representative was stressed to take up the issue with their DISCOMs as the issue if not resolved will go into CERC. It was proposed to Rajasthan that they should hold a meeting with all DISCOMs. SE© stated that efforts should be made to hold this meeting at NRPC.

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Haryana representative added that efforts are being at SLDC level to make the situation better and for doing so 1811 villages have been considered as urban and commercially slabs have been reduced in the night.

SE ( O ) proposed that the letters written by RAJSTHAN to DISCOMs should be forwarded to NRPC Secretariat so that the matter can be pursued .

2. MVAR generation/absorption in the grid a. Absorption of MVAr by Generator:

NRLDC representative stated that in OCC discussions it has been suggested for MVAr absorption by generator and the SCADA graph of MVAr vs. Voltage is being monitored and shown in OCC to track the actual response contributed by the Generator in the need of hours. It has been observed that for some of the generators, either the absorption of MVAr was not adequate as per the capability curve or the telemetry of MVAr data was not accurate. Response of some of the thermal/gas machine for the month of Jan’18/Feb’18 is enclosed in Annexure-2 of the Agenda of THE 144th OCC meeting. It is pertinent to mention here that SCADA data measure from HV side of GT thus, actual MVAr absorption by the generator would be lesser than as observed from the plots. Plots provided by NTPC are also attached in Annexure-2.

Rihand: Absorbing upto 500 MVAr (data needs to be checked) Singrauli: Absorption and generation upto 200MVAr

Dadri-Th: Generating and absorbing in range of 400 to -200 MVAr, plots provided by NTPC also show MVAR generation

Jhajjar: Absorbing up to 300 MVAr Faridabad

Gas: Absorbing upto 150 MVAr, plots provided by NTPC show the same

Unchahar: Absorption and generation -100 to 100 MVAr Anpara-C: Generating upto 150MVAR most of the time Bara TPS: Absorption and generation -100 to 100 MVAr

Lalitpur TPS: Generating upto 200MVAr most of the time

Anpara-D: Absorption and generation -50 to 50 MVAr Anpara

TPS: Absorption and generation -150 to 150 MVAr

Rosa: Generating upto 150MVAR most of the time CLP

Jhajjar: Absorbing 50 to 300 MVAr

Khedar: Absorption and generation -100 to 300 MVAr Kalisindh: Absorption upto 250MVAr Suratgarh: Generating upto 150MVAR most of the time

Chhabra: Absorbing up to 200 MVAr Rajpura: Absorption upto 450MVAr

Data of Talwandi Saboo & Rajpura TPS was not available/ not reliable for most duration for last 30 days.

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NTPC he stated have started to plot generator MVAr v/s voltage plots using their SCADA data and share the same. In last OCC meeting, it was stressed that states shall develop MVAR v/s voltage plots based on their SCADA data which would yield better results and hence more effective monitoring of MVAR generation by generators could be done to benefit grid operation. NRLDC representative stated that MVAR generation by NTPC Dadri was there as per their data and the data submitted by NTPC. NTPC was advised to look into the issue and to absorb maximum MVAR as per generator capability curve to help maintain the grid voltage. NTPC representative , added that there was no problem of overvoltage at Rihand, Singrauli and Unchahar. NRLDC representative add that the plot generator MVAr v/s voltage plots using their SCADA data may be prepared and shared with NRLDC. NRLDC representative added that at Khaedar there was also absorbing MVAR. Haryana representative stated that there were polarity issues. He was requested to submit data at their end and also get the polarity issue resolved. Representatives of Punjab & UP were also requested to look into the issue in the generating units of their state and they should present plots based on their data. b. Reactive Power injection at ISTS nodes:

i. NRLDC representative stated that as per NRPC REA account, following are the nodes that are injecting MVAr into the Grid and need quick attention to check all the possible desired actions.

State As per NRPC Reactive energy account (15-01-2018 To 21-01-

2018: Injection of MVAr at ISTS during High voltage Punjab Barnala, Ganguwal, Gobindgarh, Jamsher, Mahilpur, Ropar,

Amritsar (PG), Dasuya, Moga, Moga (PG), Sarna Haryana Bahadurgarh, Bhiwadi, Deepalpur, Gurgaon Rajasthan Hissar (BBMB), Khetri, Bhinmal, Heerapura, Jaipur South,

Kankroli, Kota (PG), Sikar Uttar Pradesh Anpara, Mainpuri (PG), Panki, Rosa, Simbholi Delhi Narela, Bamnoli, Bawana, Maharani Bagh, Mundka

ii. Also he added that MW and MVAr of 400/220kV ICT nodes where MVAr is

being injected from 220kV to 400kV system are as: State 400/220kV nodes where 220kV nodes is injecting MVAr to

400kV nodes Punjab Dhuri, Nakodar, Moga, Patiala, Ludhiana, Jallandhar Haryana Dhanoda, Bahadurgarh, Fatehabad, Hisar Rajasthan Bhinmal, Kankroli, Kota, Suratgarh, Heerapura, Sikar, Jaipur

South, Jodhpur Uttar Pradesh Auraiya, Kanpur, Anpara, Delhi Bamnoli, Bawana, Mundka

All the States and generating utilities are requested to provide corrective actions taken by them for ensuring MVAr absorption by generators and reducing MVAr flow from LV side to HV side.

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NRLDC representative added that, this issue of high MVAR drawl/injection was discussed in the last OCC meeting and it was of the view that identification of nodes at lower voltage level where actual MVAR drawl/injection is taking place need to be ascertained. New reactors and capacitors are being planned at several locations. Therefore, it is necessary to identify locations where actually there is need for MVAR support. Feedback from states is very important in this regardhe added. This would help in better and more efficient utilization of resources.

The draft format for feedback from states regarding above as was suggested by MS NRPC in last OCC meeting is detailed below:

S.No. 400kV nodes responsible for Reactive energy charges (NRPC Reactive energy account)

220kV nodes responsible for reactive energy charges (SLDCs)

132/66/33kV nodes/lines which are generating/consuming excessive MVARs responsible for reactive energy charges (SLDCs/ Discoms)

1 2

All members were requested to provide their feedback in this regard.The above data when collected will help in deciding the position of installing new reactors and capacitors. NRLDC representative stated that the ground level from where the MVARs injection is being done can be deciphered from this data.

MS NRPC stated that the reactive energy charges will be reduced. Delhi representative stated that they are taking up the matter with the DISCOMs actively and making efforts to reduce injection by making the cables of in the night. MS NRPC requested DTL to make a presentation on their efforts done in this regard by which their reactive energy charges have come down.SE(O) stated that the data as per format may please be shared on priority as the same will also be helpful for capacitor requirement.

3. ATC/TTC of state control area

NRLDC representative stated that the Transfer capability assessment is a continuous process and gives good idea about likely constraints, issues in respective system. As per CERC regulation each state control area has to compute its TTC/ATC in co-ordination with NRLDC. The same has been discussed in previous TCC/OCC meetings and following were agreed for each state control area:

a. Updating of base case i. New Generation/lines/ICT/LILO/Reactor/Capacitor

ii. New Node wise load/load shift if any iii. Network configuration changes e.g. line kept open at 220kV or

132kV, Bus split or any other contingent arrangement b. Assessment of TTC/ATC/RM c. Constraints observed and its action plan for mitigation d. Sharing the base case for co-ordination with NRLDC along with all the

network details, LTA/MTOA etc.

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Some of the state control areas have shared these details with NRLDC though NRLDC has been assessing the TTC/ATC of all state control area as per information available at NRLDC. In past with continuous co-ordination between state control area and NRLDC in computing the import capability, Punjab & Uttar Pradesh have started computing TTC for their own state control area. Rajasthan, Delhi & Haryana are actively involved in data sharing but TTC/ATC base case preparation and TTC computation report is still to be done. All the other states i.e. Uttarakhand, Himachal Pradesh, Jammu & Kashmir & Chandigarh are yet to start the TTC/ATC study.

TTC/ATC of summer 2018 and constraints expected this summer are given below:

State TTC during Summer-18 (MW) Constraints expected Actions required

Punjab

High generation TTC: 6700 ATC: 6100 Two units of Ropar and all units of Bhatinda considered out (as per letter from PSPCL dtd 10.1.18) TTC: 6100 ATC: 5500

• N-1 non-compliance at Amritsar, Ludhiana & Makhu.

• Overloading of underlying network at Ludhiana and Amritsar

• 220kV Amritsar-Verpal D/C & 220/132kV Verpal ICTs are critically loaded in the base case itself

• ICTs at Dhuri and Rajpura need to be revived at the earliest.

• Increase in generation at 220kV level would help in meeting high demand & also improve voltage profile.

• New 220kV lines may be planned to relieve the loading on ICTs and to meet loads through paths that are less loaded.

Haryana TTC: 7500 ATC: 6900

• N-1 non-compliance at Fatehabad, Abdullapur and Panipat

• 220kV lines from Hisar, Lula ahir, Abdullapur etc. are heavily loaded

• 220kV Hisar(PG)-Hisar(IA), 220kV lines from Lula ahir, 220kV Abdullapur-Jorian and other 132kV lines are heavily loaded and need to strictly monitored.

• Alternate arrangement for reducing loading on above lines need to be expedited.

Rajasthan

(Generation : 4890MW) TTC: 6200 ATC:5600

• N-1 contingency of Phagi, Jodhpur & Merta ICTs

• Constraint for

• Expedite commissioning of 3rdICT at Phagi

• New ICT to be planned at Jodhpur and Akal

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(Generation : 6390MW) TTC: 5000 ATC: 4400

evacuation of power from Rajwest

• High loading of ICTs at Akal and need for reactive power support

• Expedite commissioning of 400kV Rajwest-Barmer # 2 bays at Barmer end by RRVPNL

Delhi

Badarpur generation considered TTC: 5100 ATC: 4800 No generation at Badarpur considered TTC: 4800 ATC: 4500

• N-1 non-compliance at Bamnauli ICTs

• Loading on 220 kV Ballabhgarh-BTPS, 220 kV Mandola-Burari,220 kV Mundka-Peeragarhi, 220 kV BTPS-Sarita Vihar is not N-1 compliant.

• Early restoration of 400kV Mundka-Bawana D/C

• Loading on 220 kV Harsh Vihar - PreetVihar - Patparganj to be monitored closely and new arrangements to feed the load to be worked on

Uttar Pradesh

UP Own Gen. (MW)

TTC (MW)

ATC (MW)

9950 8500 8300 9750 8800 8100 9650 8600 8000 9450 9000 8500 9000 9100 8800 Low voltages: 400kV Agra(UP),Muradnagar(UP), Muradnagar New(UP), Sultanpur & several 220kV nodes.

• N-1 non-compliance at Lucknow (PG), Obra and Azamgrah ICTs

• 220kV Mainpuri PG- Mainpuri , 220 kV Agra (PG)-Ferozabad, 220kV Bainkutnpur-Dohna, 220kV Sarnath-Gajokhar, , 220kV Gorakhpur PG-Gorakhpur, 220kV lines from Baikunthpur etc. are heavily loaded

• Monitor and ensure N-1 compliance at Lucknow(PG), Obra, Azamgarh, Moradabad, Gorakhpur (PG) etc.

• Expedite commissioning of underlying n/w at recently commissioned 765kV & 400kV stations to reduce loading on other heavily loaded lines and ICTs

• Ensure sufficient generation and units on bar so as to meet demand adequately without violating ATC

Uttarakhand

With gas generation TTC: 1600MW ATC: 1450MW Without gas generation TTC: 1300MW ATC: 1150MW

• 400/220kV ICT at Kashipur is N-1 non-compliant (at much lower import if gas stations at Shravanti and Gamma Infra are out)

• 220kVRishikesh-Haridwar, 220kV Roorkee-Roorkee, 132 kV Lines from Srinagar, Dehradun, Kashipur, Pithoragarh etc. are heavily loaded

• To relieve high loading at Kashipur ICTs, maintain high generation at Shravanti and Gamma Infra gas stations so as to supply power to Mahuakhe from these stn.s instead of Kashipur ICTs

• Expedite 220kV lines from Dehradun PG (bays are ready since long)

Himachal Pradesh

TTC: 950MW ATC: 800MW

• N-1 contingency of ICTs at Kunihar leads to the critical

• Plan new lines and ICTs in 220kV level at Baddi, Kuniharetc so as to relieve

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overloading of the other ICTs.

• High loading of 220 kV Baddi-Kunihar, 220kV Nallagarh-Baddi, 132kV Kunihar-Solan

• Loading on the single 220/132 kV ICT at Hamirpur is around 90%.

loading on existing lines and ICTs

• Providing advance information about silt outages

Jammu & Kashmir

TTC:1800 ATC:1500

• N-1 contingency of Wagoora ICTs

• High loading of underlying network of Wagoora & Kishenpur

• Expedite commissioning of 400kV Samba- Amargarh D/C with underlying network at Amargarh

• Underlying network at New Wanpoh should be expedited

• Kishenganga HEP should be expedited along with corresponding evacuation lines

NRLDC representative discussed the entire NR states scenario in detail. He stated that the inclusion of SPS has not been considered while calculating the N-1 complaint elements.All states were requested to give their comments on the details send and share the TTC/ ATC calculated by each state. He added that in Haryana the situation has become better with ICT coming up in Gurgaon and Kaithal.The Haryana representative intimated efforts are being made to restore the Dhanoda line by first week of March. NRLDC representative sated that TTC/ATC has been calculated for Punjab with the scenario of not including Ropar (2 units) and Bathinda (all units).GM NRLDC stated that Punjab needs to review their power generation at 220KV levels in light of the upcoming paddy season. PSTCL representative intimated that ICTs at Rajpura will be operational in first week of MARCH. Also he added that arrangements are being made to bring the ICT of Dhuri in the system before Paddy .GM NRLDC stated that ICT loading should be reviewed .Also he highlighted that GVK should become operational During Paddy Season. MS NRPC highlighted that the Delhi calculations have been taken by considering BTPS which needs to be looked into. GM NRLDC requested RAJASTHAN representative to look into the possibility of flow of power from MIS to Badarpur as it will help in decreasing the load on Badarpur –Balabgarh Line. MS NRPC stated that PTCUL TTC/ATC be reviewed as availability of gas will not be there in the gas generators. NTPC representative informed the forum that ONGC had floated tender for sale of domestic gas from S1-VA fields of ONGC –EASTERN Offshore. Quantity of gas offered was 2.5(=/- 10% ) MMSCMD for a period of 5 years w.e.f 1.4.18 onwards with a floor price of 5.o5$/mmbtu on GCV basis and celing price of 6.30$/mmbtu withTake or

27

PAY Clause FOR 80% of Annua; Contracted quantity.ECR works out to be around Rs 4.6-5 /kwh for various NTPC plants. However, a s beneficiaries refused the consent , NTPC has not participated in the bid. HP representative stated that High loading of 220kV Nallagarh-Baddi, needs to be looked into. As regards 220 kV Baddi-Kunihar, the Haryana representative stated that the issue will be resolved with line being connected to Panchkula. All States were requested to manage loading to ensure N-1 compliance for elements under their jurisdiction. NRLDC representative stated that allstates should work out their TTC/ATC by considering all the elements especially the new elements and share with NRLDC..

NRLDC representative highlighted the constraints observed in grid operation for last 30 days were highlighted below:

Rajasthan: N-1 non-compliance observed in Jodhpur, Merta and Phagi ICT loadings. Commissioning of 400kV Chhabra- Chhabra supercritical connection should be expedited so that reliability of Chhabra-Kawai-Kalisindh complex increases.

NRLDC representative stated that lines from Chhabra be planned. Uttar Pradesh: N-1 non-compliance at Azamgarh and Obra. Plans such as

commissioning of new elements etc. to reduce loadings in Bara, Lalitpur, Parichha, Anpara complex before summer may be provided by UP.

Jammu & Kashmir: N-1 non-compliance at Wagoora ICTs accompanied with high

MVAR drawl. 220 kV lines from Wagoora (220 kV Wagoora-Ziankote D/C and 220 kV Wagoora-Pampore D/C) remain loaded upto 200-250 MW and therefore N-1 criteria gets violated

4. Demand and Generation projections of Q1 2018-19 for POC charges calculation

In line with CERC sharing of ISTS charges and losses regulation 2010 and subsequent amendments thereof, all the DICs have to submit the data for new transmission assets, Yearly transmission charges (YTC), forecast injection and withdrawal and node wise injection/withdrawal data to implementing agency for computation of PoC charges and losses for the application period. The format for data submission is available on NLDC website at

https://posoco.in/transmission-pricing/formats-for-data-submission/.

NRLDC vide its letter dated 05.01.2018 had requested utilities to furnish Technical and commercial data for April’18-May’18 Q1 (2018-2019) by 15th January 2018. Details have been received from only few utilities like Delhi, Punjab, HP, Uttarakhand, NTPC, NHPC, RAPS, SJVN, Jhajjar and Koteshwar. Other utilities are also requested to submit data as early as possible.

Further, generation and load projection has been done by NLDC/RLDCs based on monthly maximum injection/demand met in the last 3 years from actual metered data and accordingly projections have been made as attached in Annexure-3 of the Agenda of the

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144thOCC meeting.Utilities are requested to kindly check the data and correct anomalies, if any with valid justification. MS NRPC requested all utilities to review the data and changes if any in the states be intimatedpositively to NRLDC.

5. Frequent forced outages of transmission elements

NRLDC representative stated that the following transmission elements were under frequent forced outages during the month of Jan’18:

S. NO. Element Name

No. of forced outages

Utility/SLDC

1 400kV Bikaner(RRVPNL)-Suratgarh(RRVPNL) 4 Rajasthan 2 400kV Panchkula (PG) - Panipat (BBMB) 4 BBMB 3 400kV Bassi(PG)-Heerapura(RVPNL) ckt-2 4 POWERGRID 4 400kV Bareilly(UP)-Unnao(UP) ckt-1 4 UP 5 500kV Agra – BiswanathCherialli line -1 3 POWERGRID 6 500kV Agra – BiswanathCherialli line -2 3 POWERGRID 7 400kV Agra(UP)-Unnao(UP) 3 UP 8 400kV Akal(RRVPNL)-Jodhpur(RRVPNL) 3 Rajasthan 9 400kv Aligarh(UP)-Mainpuri 765(UP) ckt-2 3 UP 10 400kV Anpara(UP)-Mau(UP) 3 UP 11 400kV Baghpat(PG)-Saharanpur(PG) 3 POWERGRID 12 400kV Chabra(RVUNL)-Hindaun(RRVPNL) 3 Rajasthan 13 800kV Champa(WR) - Kurukshetra(PG) line -2 3 POWERGRID

14 400kV Dadri(NTPC)-Panipat(BBMB) ckt-2 3 POWERGRID/NTPC/BBMB

15 400kV Dehar (BBMB) - Panchkula (PG) 3 BBMB/POWERGRID

16 400kV Hamirpur(PG) -Banala(PG) ckt-1 3 POWERGRID

17 400kV Ratangarh(RRVPNL)-Suratgarh(RRVPNL) ckt-1 3 Rajasthan

18 400kV Ratangarh(RRVPNL)-Suratgarh(RRVPNL) ckt-2 3 Rajasthan

The complete details are attached at Annexure-4 of the Agenda of the 144th OCC meeting. It could be seen that issues like no auto-reclosing, HVDC protection operation, delayed clearance of fault are observed in most of the cases. The frequent outages of such elements affect the reliability and security of the grid. Hence, Utilities concerned were requested to look into such frequent outages and share the remedial measures taken/being taken in this respect. BBMB authorities were requested to send DR details for 400kV Panchkula (PG) - Panipat (BBMB) line. Rajasthan representative was requested to give DR details for the lines listed at Sr NO 1, 8 & 12, 17&18.

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Power grid representative intimated that the tripping at 500kV Agra – Biswanath Cherialli line -1 has occurred during to human error. MS NRPC stated that due care to be taken for such crucial lines especially. He added that issue of human error needs to be taken into account seriously and proper patrolling of the lines be done to analysis the defects on account of which the trippings are occurring. NRLDC representative highlighted that this month the tripping are a lot more than usual .He requested all utilities to submit the details of the trippings and the action taken. He highlighted that many cases trippings has taken due to temporary faults which can be avoided especially in case of OPGW stringing.

6. Multiple element tripping events in Northern region in the month of Jan-2018:

NRLDC representative intimated that a total of 10 grid events occurred in the month of Jan-2018. Out of these, 3 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-5 of the Agenda of the 144th OCC Meeting. Further, despite persistent discussions/follow-up in various OCC/PCC meetings, the compliance of the regulations is still much below to the desired level. Consolidated status plots are as below:

30

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. NRLDC representative intimated that the details should be send timely as it is mandatory as per grid code. The fault clearance where is more than 80msneeds to be addressed specifically Also it is noted that where the two ends are of different utilities the data is not made available timely on account of non coordination between the two utilities. NRLDC representative stated that the availability of Preliminary Report, DR/EL & Detailed Report is very essential for certifying the availability. Power grid representative was requested to expedite the process of submitting the reports regularly as and when the event occurs.

7. Details of tripping of Inter-Regional lines from Northern Region for Jan’18:

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NRLDC representative stated that a total of 15 inter-regional lines tripping within a month occurred in the month of Jan’18. The list is attached at Annexure-6 with the Agenda of the 144th OCC meeting. The status of receipt of preliminary reports, DR/EL within 24hrs of the event and fault clearing time as per PMU data has also been mentioned in the table. The non-receipt of DR/EL & preliminary report within 24hrs of the event is in violation of various regulations. As per regulations, all the utilities shall furnish the DR/EL, flag details & preliminary report to RLDC/RPC within 24hrs of the event. They shall also furnish the detailed investigation report within 7 days of the event if fault clearance time is higher than mandated by CEA (Grid Standard) Regulations.

It could be observed from attached table that not all information regarding the tripping is received from the utilities. The summary of the attached table is as below:

• Preliminary Report or DR/EL received within 24hrs: 1 events • DR/EL received within 24hrs: 0 events • Line tripping without any fault (based on PMU data): 6 events • A/R didn’t observe (based on PMU data): 2 events

Consolidated details plot is as below:

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Members were advised to the concerned for taking corrective action to avoid such trippings as well as timely submission of the information. NTPC Representative intimated that they have submitted the details of Auraiya-malanpur line. He stated that the gravity of these lines is very much hence the reports should be submitted timely.

8. Frequency response characteristic:

Two FRC based event has 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 10-Jan-

18 17:34hrs

Due to Loss of Evacuation path 1050 MW Generation loss occurred at Teesta-III, Dikchu,Tashding.

50.02 49.96 -0.06

2 30-Jan-

18 10:46hrs

Due to Fault at Koderma S/s, Generation loss of 1250 MW & Load Loss of 350 MW occurred at Koderma&Bokaro S/S.

49.95 49.88 -0.07

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 Teesta event

Remarks FRC for Koderma event

Remarks

FRC calculation for Apr-2017 onwards Average Median

PUNJAB 28% Increase in schedule 3% 31% 20%

HARYANA -34% Increase in schedule -27% 10% 13%

RAJASTHAN 13% Increase in schedule

-7% 11% 5%

DELHI -514% Increase in schedule

13% 82% 13%

UTTAR PRADESH

22% Increase in schedule

30% 38% 16%

UTTARAKHAND 145% Increase in schedule

61% Decrease in schedule

6% 15%

CHANDIGARH -86% Increase in schedule

0% -1% 0%

HIMACHAL -8% Decrease 29% 8% 2%

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PRADESH in schedule JAMMU & KASHMIR

-28% Increase in schedule

4% 11% 0%

NR 14% 17% 16% 14% In the above table, Average and Median value of FRC calculation of total 20 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 20 events is tabulated below:

State Name FRC for Teesta event

FRC for Koderma event

FRC calculation for Apr-2017 onward Average Median

Singrauli 5% SCADA data suspect -3% 0%

Rihand-1 -4% -4% 25% 22% Rihand-2 8% 11% 7% 9% Rihand-3 -43% -14% -4% -2% Dadri-1 92% 0% 55% 59%

Dadri -2 127% 5% 39% 30% Dadri-Gas No

SCADA data suspect -1% 0%

Unchahar -22% -9% -1% 0% Anta 13% No generation 3% 2% Auraiya No

No generation 0% 0%

NAPS 17% SCADA data suspect 4% 2%

RAPS-B 14% SCADA data suspect 7% 7%

RAPS-C 13% 5% 4% 3%

Jhajjar 167% 30% 48% 32%

Sh. Cement 28% -23% 5% 0%

Badarpur No generation

No generation 3% 3%

Faridabad -10% No generation -7% -3%

Khedar SCADA data

-6% -2% -2%

Panipat -1% No generation 14% 0%

Yamuna Nagar SCADA data

No generation 0% 0%

CLP Jhajjar 48% 6% 3% 0%

Suratgarh 2% -8% 0% 3%

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Chabra No generation

No generation 0% 0%

KTPS 7% 6% -3% 0%

Rajwest -5% -3% -1% 0%

Anpara -8% -1% 0% -1%

Anpara C SCADA d

SCADA data suspect 2% 0%

ROSA SCADA data

3% 8% 7%

Tanda -20% 2% 2% 2%

Paricha -28% -24% -3% 0%

Obra 28% -8% 6% 8%

Ropar -31% 105% 28% 19%

State Name FRC for Teesta event

FRC for Koderma event

FRC calculation for Apr-2017 onwards

Average Median

Chamera-1 78% 3% 29% 13% Chamera-2 SCADA data

No generation 0% 0%

Chamera-3 65% No generation 20% 12% Bairasiul -84% No generation -11% 1% Salal -20% 36% 3% 1%

Tanakpur 19% 26% 5% 0%

Uri-1 SCADA data

SCADA data

-29% 1% Uri-2 SCADA data

SCADA data

15% 0%

Dhauliganga -28% No generation 37% 22% Dulhasti 107% -1% 17% 4%

Sewa-II No generation No generation 10% 0%

Parbati-3 0% No generation 4% 0%

Jhakri Schedule Change

No generation 22% 17%

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Rampur Schedule Change

No generation 5% 0%

Tehri 86% SCADA data

22% 3% Koteswar SCADA data

suspect SCADA data suspect

7% 0%

Bhakra -3% -4% 0% 0% Dehar -29% No generation -6% 0% Pong 11% -6% -2% -1% KarchamWangtoo* SCADA data

No generation 65% 44%

Malana-2 No generation 0% 0% 0% Budhil No generation No generation 14% 0%

VishnuPrayag SCADA data suspect

SCADA data suspect

1% 0%

Koldam Schedule Change

No generation 11% 9%

AD Hydro 37% 44% 12% 0% Sainj 8% 26% 8% 6%

In line with the decisions taken during various OCC meetings, the time and date of the FRC events were e-mailed to respective utilities. Details are received from UP, Punjab, Tehri HEP, Rosa TPS, Kawai TPS only. Utilities were requested to kindly submit the FRC of their control areas and reason of poor response. ISGS generators were requested to kindly submit the FRC response details along with reason of poor response.

NHPC representative intimated that the problems at Dhauliganga needs to be looked into as the OEM is looking into.

NTPC representative informed that they have extended RGMO/FGMO on/off signal to NRLDC from all generating units in nr except Koldam which will be completed by March 18. APCPL UNIT I is also hooked up Unit 2&3 will be hooked up on next opportunity of shut down.

MS NRPC requested all generating units to ensure that RGMO/FGMO on/off signal to be extended to NRLDC.

Punjab & Rajasthan representative were requested to see that better response is received from RGMO/FGMO. NRLDC representative intimated that the details are being send but response is not being received to the extent it should.

9. Revision of document for System Restoration Procedure (SRP) for Northern Region:

Based on discussions in OCC meetings and in line with IEGC compliance, System restoration procedure for Northern region has been issued by NRLDC in Jan’18. The above documents are available at NRLDC website on the given link and password that

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has already been communicated through NRLDC letter dated 31.01.2018 to all the concerned utilities of Northern region

https://nrldc.in/wdata/NR-SRP-2018.pdf

Status of details received is tabulated below:

System Restoration Procedure

Data/ Comment Received from Data/Comment yet to be received from

Haryana Delhi SJVN NHPC Karcham (JSW) HP Punjab Rosa (Reliance) J&K NPCIL Greenko Budhil Malana-I THDC NTPC JAYPEE

AD Hydro POWERGRID POWERLINK Rajasthan Railway PKTCL

UP Shree Cement

Uttarakhand Malana-II

BBMB Chandigarh APCPL Adani

NRLDC representative requested all constituents to study the documents and give any comments on the same.MS NRPC requested Delhi to review the document from their point of view. He added that Railways needs to be also asked to review the system restoration procedure. All utilities are requested to make their own system restoration procedure. Punjab and Haryana have submitted .Delhi representative confirmed that they will do at the earliest. HP representative intimated that the generators do not have Black start facilities.

10. A Review of over voltage setting of northern Region:

NRLDC representative intimated that during winter nights, NR load reached up to minimum MW level. It resulted into widespread high voltage in the grid. In this critical condition many times multiple elements tripping also occurred in the region due to over voltage. Over voltage setting of 400kV and above transmission network needs to be reviewed and it needs details from the constituents. In this regard one mail was already circulated to all the constituents and also discussed this agenda in last OCC meeting but details are still awaited from most of the NR constituents. Format is tabulated below:

S.No Name of Line

First end setting Second end setting Voltage setting stage I

(%)

Time delay (sec)

Voltage setting stage 2

(%)

Time delay (sec)

Voltage setting stage I

(%)

Time delay (sec)

Voltage setting stage 2

(%)

Time delay (sec)

1 First end-

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Second end

2 Data available with NRLDC/ NRPC is attached as Annexure-7 of the Agenda of the 144th OCC meeting. All the NR constituents shall check the details and share the correction if any.

11. Mock Black start exercises for year 2017-18:

As per Indian Electricity Grid Code (IEGC) clause 5.8(b) “Mock trial runs of the procedure for different sub-systems shall be carried out by the Users/ CTU/ STU at least once every six months under intimation to the RLDC”.

The summary/schedule of mock black start exercise of ISGS hydro stations carried/to be carried out is tabulated below:

S. No.

Proposed Date Revised Date Generating station Remarks

1 24-Oct-17

Koldam Carried out successfully.

2 31-Oct-17 Jan-Feb’18 Nathpa Jhakri & Rampur

Deferred. Tentatively in Jan-Feb’18.

3 3-Nov-17 15-Nov-17; To

be revised again

Dhauliganga Deferred due to load management.

4 7-Nov-17 13-Nov-17; Again to be

revised Salal

Deferred due to pending consent from SLDC-J&K.

5 10-Nov-17 3-Nov-17 Sewa-2 Carried out successfully. 6 14-Nov-17 To be revised Budhil

7 17-Nov-17 To be revised Malana-2 Deferred by Plant

8 21-Nov-17

Parbati-3 Carried out successfully. Island collapsed while carving out.

9 24-Nov-17 04-Dec-17 Chamera-3 Carried out successfully.

10 30-Nov-17 06-Dec-17; To

be revised again

Uri-I, II HEP, Lower Jhelum HEP, Pampore GT’s & Upper Sindh

Deferred due to pending consent from SLDC-J&K.

11 5-Dec-17 1-Dec-17 Chamera-2 Carried out successfully. Island collapsed during stage-1. 12 8-Dec-17 1-Dec-17 Chamera-1

13 20-Dec-17

Bairasiul Carried out successfully. Unit tripped after island synchronization with grid.

14 4-Jan-18

Koteshwar Carried out successfully.

15 9-Jan-18 After 22-Jan-

17 AD Hydro

Deferred due to load management.

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16 16-Jan-18

Karcham Wangtoo Carried out successfully.

17 23-Jan-18

Tehri Deferred due to load management. (Board exam in UP)

Dates of mock exercised were decided after discussion in OCC meeting in the presence of all the members. Feedback/ changes were already taken before preparing the schedule. After regular agenda and discussion in each OCC meeting, in real time before one or two days of actual date, postpone request was raised by many of the utilities. As many utilities involved in the exercise lots of co-ordination require to changing the date of exercise. For the next time date shall be freeze before three month (in the month of Aug-Sep) and thereafter changes would not be entertained.

For remaining generators, kindly discuss and decide the revise date of mock exercise and stuck to the schedule. In 140th OCC meeting Rajasthan informed about tentative dates of mock black start exercise for state generating units. SLDC’s shall also carryout mock black-start of station in their respective control area & inform the tentative dates to the OCC as well as outcome of these exercises. The proposed Hydro Power Stations to undergo the exercise are as follows:

S. NO. Utility Hydro Power Station Installed Capacity(MW) 1

J&K

Baglihar 3x150 2 Baglihar stage-2 3x150 3 Lower Jhelum 3x35 4 Upper Sindh 2x11+3x35 5

HP

Sainj 2x50 6 Larji 3x42 7 Bhabha 3x40 8 Malana -I 2x43 9 Baspa 3x100 10 Punjab Anandpur Sahib 4x33.5 11 Ranjit Sagar 4x150 12

UP

Rihand 6x50

13 14 15

Obra 3x33 Vishnuprayag 4x100

Srinagar (Alaknanda) 4x82.5 16

Uttarakhand

Gamma Infra 2x76+1x73 17 Shravanti 6x75 18 Ramganga 3x66 19 Chibro 4x60 20 Khodri 4x30 21 Chilla 4x36 22 ManeriBhali-I&II 3x30+4x76 23 IP Extn GTs 6x30+3x30

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24 Delhi Pragati GPS 2x104.6+1x121.2 25 Rithala 3x36 26 Haryana Faridabad GPS 2x137.75+1x156.07

During last winter, it was discussed and decided that SLDCs shall carry out mock drills and share their experiences. However, the information is yet to be received. The information shall also be shared by SLDCs in compliance to last year OCC/ NRPC decision. Program for this year’s mock black start exercises shall also be shared. SLDCs shall submit the reports of black start exercise in their respective control area. SLDCs may also identify further generating stations/unit for black start exercise.

All utilities are requested to perform black start exercise.