THDC India Ltd., a subsidiary of Indian power supplier NTPC Ltd., has commissioned the third 250 MW unit of its 1 GW (4×250 MW) variable speed pumped storage hydropower plant in Tehri, Uttarakhand.
The project comprises four units of 250 MW each and is designed to provide 1 GW of peak capacity to support electricity grid reliability in northern India.
The project’s first 250 MW unit was completed in June.
In July, state-owned hydropower company THDCIL signed a Memorandum of Understanding (MoU) and Power Purchase Agreement (PPA) with the Gujarat government and GUVNL for 184.08 MW of clean energy from the plant.
The upper and lower reservoirs for the pumped storage system are formed by the Tehri and Koteshwar dams on the Bhagirathi River.
The project is being developed by Alstom in collaboration with Hindustan Construction Co. (HCC). Alstom’s scope includes the supply of four 250 MW variable speed turbine generator units, together with the plant’s main inlet valves and control and protection systems.
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