Minutes of the Meeting Number: 517 Name of Meeting: Operation & Coordination Sub-Committee Date & Venue: 13Thmarch 2019 at WRPC, Mumbai
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Western Regional Power Committee Mumbai Title: Minutes of the Meeting Number: 517 Name of meeting: Operation & Coordination sub-Committee Date & venue: 13thMarch 2019 at WRPC, Mumbai. 517thmeeting of Operation & Co-ordination sub-Committee (OCC) of Western Regional Power Committee (WRPC) was held on 13th March, 2019 at WRPC, Mumbai. The list of participants is enclosed at Annexure-I. Member Secretary (MS), WRPC extended warm welcome to all the participants of the 517thOCC meeting. He informed the forum about the following important operational highlights and events of WR grid during the month of February, 2019: a) After implementation of 4th amendment DSM regulation, frequency is remaining more in outside the band which is not desirable. b) “National Electricity Plan (Vol. II): Transmission” has been published by CEA. Grid scenario for the year 2026-27 has been addressed. Members were requested to go through the transmission plan for WR and accordingly do the needful. c) CERC (Terms and Conditions of Tariff) Regulations, 2019 (for 5 years: 1.4.2019 - 31.3.2024) has been notified by CERC. Tariff compensation provisions for installation of FGD system has been specified for both new and existing thermal power plants. d) MoP has issued an office memo on “Measures to promote Hydro Power Sector” specifying budgetary support and others. (Annexure-8.14) After the opening remarks, the agenda items were taken up for discussion by S.E(Opn),WRPC. █ Confirmation of the Minutes Minutes of 516th meeting of Operation & Coordination Sub-Committee (OCC) of WRPC held on 11th February, 2019 at WRPC Mumbai, were issued vide letter No. WRPC/OPN/OCC-Minutes/2018-19/2322 dated 25.02.2019. No Comments have been received. OCC subcommittee confirmed the 516th OCC minutes of meeting. Minutes of 517thOCC meeting held on 13th March, 2019 Page 1 █ Review of System Operation (February, 2019) 2.1 A. Frequency Particulars (February 2019) The frequency profile for last three months was as under: Particulars Frequency Date Time Maximum instantaneous 50.27 Hz 27thFebruary, 2019 06:03:40 hrs Minimum instantaneous 49.68 Hz 01stFebruary, 2019 12:42:50 hrs Average 50.00 Hz 01st – 31st 01st – 31st 01st – 28th December,2018 January,2019 February,2019 Range (% time) (% time) (% time) IEGC band (49.9 < f < 77.03 70.26 70.73 50.05 Hz) < 49.9 Hz 12.68 10.69 7.01 > 50.05 Hz 10.29 19.06 22.26 Discussion: MS, WRPC expressed concern about shifting of frequency to higher levels. OCC subcommittee members are of the view that it is the impact of DSM 4th amendment. SE (Opn), WRPC, stated that the issue of impact of 4th DSM amendment on operation aspect was discussed in 516th OCC under agenda 8.9 and it was concluded that members would submit the comments at the earliest. He added that SLDC, Gujarat has brought the same agenda again in this OCC which is at item no. 8.9. He informed that the agenda related to DSM is more or less related to Commercial issue but operation aspects related to effect /impact on system parameters can be discussed in this forum. Commercial related issues can be brought to CCM for discussion. He requested all the participants to express their operation related concerns /issues on new DSM amendment regulation. CE, SLDC Gujarat informed that after implementation of amendment regulation, the States are increasing their generation for sign reversal even at the time of high frequency which cause the frequency to move outside the band. Therefore, important operation aspect of maintaining the real time frequency within the specified band is somehow being ignored by the system operator at the cost of maintaining deviation within the limit. This is being done by them to avoid exorbitant payment on account of sign change violation. This new trend of operation after DSM amendment is having detrimental effect on safety and stable operation of grid. All the constituents are losing crores of rupees even without their fault as it is purely due to difference in SCADA and SEM reading. He also informed that SCADA value measured by states and WRLDC is not the same. He further informed that there is a huge difference in number of sign violations as per Minutes of 517thOCC meeting held on 13th March, 2019 Page 2 SCADA data monitored by the constituents and the final DSM bills issued by WRPC based on SEM readings. A constituent after continuously monitoring and managing the power flow during entire day may feel happy at the end of day, but if he knew that there was sign change violation recorded in SEM, he would certainly be heartbroken. In DSM accounts the sign reversals violations are approximately three to four times more than the monitored value at State LDC level causing more penalties for state. SE (Opn),WRPC, inquired whether the intended objectives of DSM amendment regulation have got achieved by imposing huge penalty to the constituents for violation of sign change. He requested all the participants to throw light on achievement of objectives of imposition of huge penalty. The CE, SLDC Gujarat informed that one of the objectives was to further narrowed down the frequency band but this is not being achieved. Certainly, there is a slight improvement in terms of Hertz but the frequency band has got widen due to changed methodology of operation which is purely based on least deviation instead of real time frequency. A representative of NTPC stated the following: 1. In a time-block sometimes RGMO command is generated for increasing load at dip in frequency while the same block maybe the 7th block for change of DSM sign to reduce load. This is being a contradictory affair and needs to be reviewed. 2. In night hours stations are getting low schedule with sustained high frequency. But to avoid penalty for sign change in every 7th block, we have to over-inject at high frequency time blocks. Similarly at low freq at high demand period, we have to under inject. This needs to be reviewed in keeping the point of grid security. Apart of SLDC, Gujarat and NTPC, other participants stated that they would furnish the comments in details at the earliest. MS, WRPC informed that a meeting on CERC 4th DSM amendment was held at New Delhi which was arranged by CERC and views mentioned by the entities were discussed in the meeting. SE(Opn), SLDC Chhattisgarh informed that 20% error was observed between SCADA and metering data at Raigarh ICTs. He requested to correct the errors of SCADA at state interface values. SE(Opn) requested all concerned utilities to furnish their comments with relevant data by 28/03/2019 for further transmission to CERC/ CEA . OCC subcommittee noted as above. 2.1 B. State-wise Power Scenarios of the Region & PSP System operation during the month of February 2019 was satisfactory. The regional demand (Gross) was 54536MW. The corresponding peak shortfall was in the range of 244 MW (peak deficit of 0.45%). The energy requirement during the said period was 29656 MUs (Ex-bus). Minutes of 517thOCC meeting held on 13th March, 2019 Page 3 The power supply position (provisional) for the month of February 2019 was as follows: Peak Demand Availability/Unrestricted Requirement (Gross) In (MW) GUJ MP CG MAH GOA DD DNH ESIL WR REQUIREMENT 15409 13505 4094 21079 595 331 800 898 54536 AVAILABILITY 15409 13505 4090 21020 594 331 799 895 54292 SHORTFALL 0.00 0.00 4.29 58.86 0.21 0.46 1.12 2.19 244.00 % SHORTFALL 0.00 0.00 0.10 0.28 0.03 0.14 0.14 0.24 0.45 Energy Availability/ Requirement etc.(Ex-Bus) in (MUs) GUJ MP CG MAH GOA DD DNH ESIL WR Net Actual Energy 29648 Supplied 8595 6119 2187 11378 319 199 525 325 29656 Unrestricted 8595 6119 2195 11378 319 199 525 325 Requirement SHORTFALL in 0.00 0.00 7.67 0.00 0.00 0.00 0.00 0.00 7.67 MU 0.000 0.000 0.349 0.000 0.000 0.000 0.000 0.000 0.026 % SHORTFALL Further it is requested all the utilities to furnish the monthly data e.g. unit wise generation of hydro and thermal generating unit, unit wise generation of hydro and thermal generating unit, unit wise /station wise auxiliary consumption of hydro and thermal generating unit, station-wise /state-wise generation of Solar/Wind/ Biomass, State-wise ISTS drawl etc. in new format attached at Annexure-2.1A. Discussion: SE (Opn), WRPC informed that recently, CEA pointed out that there was a negative growth in case of Chhattisgarh for the month of January 2019 vis-à-vis 2018 and sought comments. Subsequently, CE, SLDC, Chhattisgarh was contacted and it was informed by him that the PSPM data was not correct. He further added that PSPM (Power Supply Position Report) is one of the important documents which is used for planning of power sector by CEA / MoP and therefore, it is necessary for every States and UTs to tally the figures with their data base and point out the discrepancy if any in the same OCC so that correction can be made in revised PSPM (final). He also informed that Revised PSP will be attached with OCC minutes for perusal by the constituents. Minutes of 517thOCC meeting held on 13th March, 2019 Page 4 Revised PSP is attached as Annexure-2.1B. The Sub-Committee noted as above. 2.2 Inter-Regional Exchanges (February-2019) There was a net inter-regional export of 6260 MUs from WR to other regions against net export schedule of 6352MUs.