The Central Electricity Regulatory Commission (CERC) has issued the Second Amendment to the Deviation Settlement Mechanism and Related Matters Regulations, 2024. This amendment was notified on June 25, 2025, and will come into effect from July 1, 2025. It introduces important revisions to how charges for the injection of infirm power into the grid will be handled.
As per the new amendment, charges for injecting infirm power into the grid will generally be zero, but there are some exceptions. For thermal generating stations, if they inject infirm power into the grid from the date of first synchronization of a unit until the successful completion of the trial run, they will be paid at the normal rate of charges for deviations. However, this payment is capped at ₹2.86 per kilowatt-hour for each time block.
Another important change applies to situations where infirm power is scheduled after the successful trial run, as defined in the Grid Code. In such cases, if there is any deviation from the scheduled infirm power, the charges applicable will be those that apply to a general seller or a WS (Wind and Solar) seller, depending on the case.
Additionally, the amendment states that if the system frequency goes above 50.05 Hz, then no charges will apply for the injection of infirm power or any deviation in the scheduled infirm power due to over-injection. This applies to both general sellers and WS sellers after the successful trial run.
These new provisions aim to bring more clarity and fairness in the treatment of infirm power during the initial phases of power plant operations. They also help maintain grid discipline by linking certain payment conditions to system frequency and trial run status.
The amendment is part of CERC’s broader efforts to ensure that the electricity grid operates stably and efficiently, while also supporting new generating stations during the initial synchronization and trial phases. It balances the needs of power generators with the requirement to maintain overall grid stability.
The original Deviation Settlement Mechanism and Related Matters Regulations were first issued in August 2024, followed by a first amendment in December 2024. The second amendment of June 2025 continues the process of refining these regulations to adapt to operational realities and evolving grid conditions.
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