THDC India Commences COD Process for 250 MW Second Unit of 1 GW Tehri Variable PSP
THDC India Ltd. has commenced the Commercial Operation Declaration (COD) process for the second 250 MW unit of its 1,000 MW Variable Speed Pumped Storage Plant at Tehri, Uttarakhand.
July 07, 2025. By Mrinmoy Dey
This development marks a significant advancement in India’s hydropower capabilities as Tehri Pumped Storage Plant is not only the country’s first Variable Speed Pumped Storage facility, but also the largest of its kind implemented by any Central Public Sector Enterprise, the company said in a statement.
With the first unit already operating successfully since June 2025, the commencement of second unit’s COD process further reinforces THDCIL’s expertise in delivering technologically advanced and grid-responsive clean energy infrastructure.
The event was graced by Pankaj Agarwal (IAS), Secretary, Ministry of Power, who officially commenced the operation of the second unit via virtual mode in the distinguished presence of Akash Tripathy (IAS), Addl. Secretary, Ministry of Power; Mohammad Afzal, Joint Secretary, Ministry of Power; Gurdeep Singh, CMD, NTPC; R.K. Vishnoi, CMD, THDCIL; Shallinder Singh, Director (Personnel), THDCIL; Bhupender Gupta, Director (Technical), THDCIL; and Sipan Kumar Garg, Director (Finance), THDCIL.
Commenting on the development, R.K. Vishnoi, Chairman and Managing Director, THDCIL stated that the commencement of COD process of second unit at Tehri PSP not only symbolises a cutting-edge technological breakthrough by THDCIL but also signifies a resolute step towards India’s energy independence. “With four reversible units of 250 MW each, Tehri PSP brings a unique advantage of generating 1,000 MW of clean peaking power, addressing the crucial need for system reliability and grid stabilisation,” he said.
Vishnoi stated that upon commissioning of all four units of Tehri PSP, the Tehri Hydro Power Complex will generate 2,400 MW, emerging as India’s largest hydropower complex.
The company shared that the key variable-speed turbines, generators, and advanced digital control systems have been supplied by GE Vernova. “Their contributions have enabled THDCIL to integrate high-performance solutions that set new standards for hydroelectric excellence in India,” it said.
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