Maharashtra joins the list of states with final Forecasting and Scheduling regulations

Recently Maharashtra became the latest state to publish final Forecasting and Scheduling (F&S) regulations. These regulations were published in the State Gazette on July 20, 2018. With this, all supposedly “RE rich” states except Gujarat and Tamil Nadu have finalized their F&S regulations.

The detailed summary of the regulations is as below:

Regulation Applicable on All grid-connected Wind and Solar Power Generators with pooling station capacity not less than 5MW or that of an individual Generator connected to some other Substation, shall not be less than 5 MW.

Deviation Accounting: The deviation accounting can be either carried out based on the Available Capacity:-

Available Capacity (AvC) = 100/Actual Generation – Scheduled Generation AbsoluteError in %

Point of Forecasting: Pooling Station or STU Feeder where injection is made.

Keypoints

  • No Aggregation – Clause 5.13 specifies the aggregation of schedules at Pooling Substation level only, and not of multiple pooling station capacity.
  • Further charges in case of shortfall in DSM pool – Clause 12.1 (d) specifies that any shortfall in the aggregate amount of Deviation Charge payable by Solar and Wind Energy Generators at the State periphery and the amount receivable from them by the Pool Account shall be recovered in proportion to their deviation reflected at the State periphery.

Sr.

No.         

Absolute Error in %age terms in 15-minute time block                               Deviation Charge payable to Pool Account for Wind/Solar Generation
1 < = 15%

None*

2 >15% but <=25% At Rs. 0.50 per unit for the shortfall or excess beyond 15% and up to 25%
3 >25% but <=35% At Rs. 0.50 per unit for the shortfall or excess beyond 15% and up to 25% + Rs. 1.00 per unit for the balance energy beyond 25% and up to 35%
4 >35%

At Rs. 0.50 per unit for the shortfall or excess beyond 15% and up to 25% + Rs. 1.00 per unit for the shortfall or excess beyond 25% and up to 35% + Rs. 1.50 per unit for the balance of energy beyond 35%      

Role of a QCA:

  • Provide day ahead, weak ahead and intra-day forecast, schedules and periodic revisions;
  • Coordination with DISCOM/STU/SLDC for metering, data collection, communication/issuance of dispatch/curtailment.
  • De-pooling of charges among generators
  • Commercial settlement of DSM charges and all other ancillary and incidental matters.
  • The QCA shall furnish weekly meter readings to the SLDC by 00.00 hours on Thursday of the previous week, in addition to the data provided to the SCADA Centre, for the purpose of energy accounting under these Regulations.

Revisions:

  • 16 revisions are permitted starting from 00:00 Hrs of the day for Wind & Solar Generators
  • All revisions will be effective from the 4th time-block

Important differences between intrastate and interstate transactions:

  • The sale of power within Maharashtra by Solar and Wind Energy Generators connected to the Intra-State Transmission Network shall be settled by the Procurers on the basis of their actual generation.
  • The sale or of power outside Maharashtra by Solar and Wind Energy Generators connected to the Intra-State Transmission Network shall be settled by the Procurers on the basis of their scheduled generation.
  • Inter-State transactions at a Pooling Sub-station shall be permitted only if the concerned Generator is connected through a separate feeder. In that case, a separate Schedule will have to be provided for its energy generation.
  • The Generator shall pay the Deviation Charges applicable within Maharashtra in case of deviations in the State DSM Pool Account, the consequences of such deviation at the Inter-State level being governed by the CERC Regulations governing the Deviation Settlement Mechanism and related matters.

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