Balancing Grid Discipline with Energy Transition: Why the New Congestion Charges Risk Stalling RE Growth

The Risk of "Dual Penalization"

RE generators are already governed by the Deviation Settlement Mechanism (DSM), which penalizes variability. Imposing an additional 1.5x multiplier for congestion creates a "dual penalization" structure. Unlike conventional plants, wind and solar farms cannot instantaneously ramp down without losing that energy forever. Penalizing a generator for an inherent characteristic of the resource—its variability—is an extra financial burden on an industry already operating on thin margins.

Disconnected Economic Realities

The proposed floor price of ₹3/kWh is particularly concerning. During peak solar hours, the Market Clearing Price (MCP) can drop below ₹0.5/kWh. A ₹3/kWh penalty for "over-injection" essentially forces RE generators to curtail power, leading to a national loss of "Must-Run" green energy.

Infrastructure Bottlenecks vs. Generator Penalties

Often, grid congestion is a direct result of delayed Inter-State Transmission System (ISTS) infrastructure. It is inherently unfair to place the financial burden of these infrastructure delays on the generators who are ready to supply power but are restricted by the grid’s current capacity.

A Call for a Supportive Framework

To ensure the RE sector continues to thrive, following may be proposed

• Exempting Existing Projects: Already bid out RE projects should be protected from these new levies to maintain investor confidence.
• A Fair Grace Period: Provide a 4-time-block (1 hour) window for RE generators to respond to congestion warnings before charges apply.
• Rationalizing Rates: Remove the floor price for RE and cap maximum charges at 1.5 times the weighted average RE tariff from the last three years.
• Storage as the Solution: Shift from a penalty-based approach to an incentive-based one, encouraging the use of Battery Energy Storage Systems (BESS) to mitigate congestion.

The path to a green grid should be paved with incentives for technology and infrastructure, not punitive measures that place the weight of the transition on the shoulders of RE developers.