The Central Transmission Utility of India (CTUIL) has issued an advisory clarifying the processing of applications for renewable energy generator connection details in line with the Central Electricity Regulatory Commission’s General Network Access (GNA) Regulations.

The advisory addresses mismatches between installed capacity in simulation study models and the connectivity grant letters. Referring to a CERC order dated December 8, 2025, CTUIL said renewable energy developers can install additional inverters, wind turbine generators (WTGs), or equivalent equipment solely to meet technical compliance requirements at the point of injection.

Such additional capacity, intended for reactive power compensation, internal losses, or other technical needs, will not require additional bank guarantees for connectivity, provided active power injection does not exceed the connectivity already granted. CTUIL will validate this extra capacity through system studies.

However, developers must submit an undertaking, supported by steady-state simulation results, breaking down active power delivery, reactive power, internal losses, and other technical compliance requirements.

The advisory aligns simulation requirements with the Central Electricity Authority’s 2024 procedure on design temperature for renewable energy projects, which requires disclosure of inverter capacity exceeding rated installed capacity due to ambient temperature considerations.

CTUIL clarified that applications for additional generation capacity under Regulation 5.2 of the CERC GNA Regulations, 2022—limited to meeting technical compliance—will be processed and regularised at regional consultation meetings during the transition period. After the transition period, such applications will require prior discussion in the Consultation Meeting for Evolving Transmission Schemes.

The advisory also reiterates that derating of wind turbines at high ambient temperatures will be considered as per the Ministry of Power’s September 2025 memorandum, and transformer overloading at generator pooling stations will be assessed in line with CEA decisions.

To ensure timely processing, CTUIL has capped revisions to simulation study reports at three, after which applications will be closed and must be resubmitted through the National Single Window System portal.

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