CERC notifies draft DSM regulation for interstate purchase and sale of electricity – EQ Mag Pro
Central Electricity Regulatory Commission(CERC) notified CERC (Deviation Settlement Mechanism and Related Matters) Regulations, 2021. The regulation will be applicable to all grid connected regional entities and other entities engaged in inter-State purchase and sale of electricity.
Purpose of this regulation is to ensure that users of the grid do not deviate from and adhere to their schedule of drawal and injection of electricity in the interest of security and stability of the grid through a commercial mechanism.
How will the deviation be computed?
According to the regulation, deviation in a time block will be computed as follows:
For general sellers (in %) = 100 x [(Actual injection in MWh) – (Scheduled generation in MWh)] / [(Scheduled generation in MWh)]
For WS (Project based on wind and solar energy) sellers (in %) = 100 x [(Actual Injection in MWh) – (Scheduled generation in MWh)] / [(Available Capacity)]
For Buyer = (in %) = 100 x [(Actual drawal in MWh) – (Scheduled drawal in MWh)] / [(Scheduled drawal in MWh)]
How will the charges be linked to the deviation?
For a given time block, the charges will be calculated as follows:
Normal rate of charge(Paise/kWh) = Highest of
[the weighted average ACP(Area Clearing Price) of the Day Ahead Market segments of all the Power Exchanges;
or the weighted average ACP of the Real Time Market segments of all the Power Exchanges;
or the Weighted Average Ancillary Service Charge of all the regions]
In case of non-availability of ACP for any time block on a given day, ACP for the corresponding time block of the last available day will be considered.
Charges of deviation
It is also important to note that the charges for inter-regional deviation and for deviation in respect of cross-border transactions, caused by way of over-drawal or under-injection will be payable at the normal rate of charges for deviation.