Department of Management Sciences (DoMS) Indian Institute of Technology Kanpur

Draft CERC (Ancillary Services) Regulations, 2021

Electricity send Ancillary Services
27 July 2021 Keywords: CERC, SRAS, TRAS, Demand response, Battery storage, RTM, DAM, Area Control Error, Ramping, Market based mechanism, Grid security


Highlights -

Central Electricity Regulatory Commission (CERC) prepared and notified on 29th May, 2021 the draft Ancillary Service Regulations, 2021. The aim of the regulations are as follows:

❖ To provide mechanisms for procuring, deploying, and paying for ancillary services, through administered and market-based mechanisms
❖ To maintain grid safety and security while ensuring smooth power system operation

EAL Opinion-

❖ Demand response aggregator should be introduced as one of the eligible participants in the AS.
❖ URS should be computed as the difference between the declared capacity of the generating station and its total schedule by the respective beneficiaries. This should, thus, be calculated ‘prior to scheduling and despatch of the respective ancillary services’.
❖ To ensure effective participation of demand response, there is need to design and implement a demand response program with participation of aggregators, with adequate safeguards to ensure that the underlying rules encourage genuine demand response participation.
❖ The scale of proposed incentive in draft regulation seems to be disproportionately high and will impose undue burden, particularly on distribution utilities.
❖ From point of view of total cost burden on ultimate consumers, incentive scheme should also be supplemented with penalty mechanism wherein performance below 45-70 %  should be subjected to a penalty.
❖ It is suggested that a phased implementation strategy be adopted wherein RTM-TRAS is implemented along with SRAS in the first phase.
❖ It is suggested that pay-as-bid framework would be economically more efficient and fair mechanism for price discovery of TRAS-Up service.
❖ The timeline proposed in the draft regulation needs to be fine-tuned to ensure that it is consistent with the deployment process mentioned elsewhere in the  regulation.
❖ A modification is suggested to include ramping rate (in %) rather than in absolute term (MW/min) to provide correct incentive for the same.



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