CTU issues advisory on additional RE capacity in connectivity studies
Author: PPD Team Date: January 13, 2026
The Central Transmission Utility (CTU) has issued a follow up advisory on processing generator connection applications where installed capacity in simulation studies differs from the capacity stated in the connectivity grant letter for renewable energy (RE) plants and parks.
Citing a Central Electricity Regulatory Commission (CERC) order dated December 8, 2025 in Petition No. 14/SM/2025, the CTU said RE developers are allowed to install additional equipment such as inverters or wind turbine generators (WTGs) to meet technical requirements at the Point of Injection (POI). This additional capacity is permitted without extra connection bank guarantees and without applying Regulation 5.8 of the CERC Grant of Connectivity, Long term Access and Medium term Open Access Regulations, 2022, provided it is used only for technical compliance.
The Central Transmission Utility of India Limited (CTUIL) will confirm the required additional capacity through system studies. The capacity can be used for reactive power, internal losses including DTL loss, or other POI related technical standards. Active power injection at the POI should not exceed the originally granted connectivity quantum.
Applicants seeking this relaxation should submit an undertaking in Annexure A along with steady state simulation study results, clearly showing the capacity breakup for active power, reactive power, losses, and other compliances. Applications for additional capacity are to be made under Regulation 5.2 of the CERC General Network Access Regulations, 2022, and will be regularised through Consultation Meetings for Evolving Transmission Schemes (CMETS) during the transition period.
The advisory also covers wind turbine derating at high temperatures, transformer overloading at Generator Pooling Stations, limits revisions of simulation studies to three rounds, and requires submission of Python automation files for batch processing of RMS and EMT studies.
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