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GE Vernova Commissions India’s First Variable-Speed Pumped Storage Unit at Tehri

GE Vernova Inc. has successfully commissioned the first of four 250 MW variable-speed units at THDC India Limited’s Tehri Pumped Storage Hydropower Plant in Uttarakhand. This marks a major milestone as Tehri becomes India’s first hydropower plant to use variable-speed pumped storage technology and the nation’s most modern hydro facility. Once all four units are operational, the Tehri Hydropower Complex will expand to 2.4 GW, becoming India’s largest hydropower project.

The new technology allows for fast transitions between turbine and pump modes, offering enhanced grid flexibility—an essential feature as India's renewable energy share grows. These units will also support irrigation and drinking water needs during dry periods.

Pumped storage is the world’s leading long-duration energy storage solution, accounting for 94% of installed global capacity. It plays a vital role in stabilizing power grids by storing energy during low demand and releasing it when demand peaks. GE Vernova is providing a full “water-to-wire” solution, including integration of doubly-fed induction generators, pump turbines, power electronics, and control systems.

With hydropower accounting for around 51 GW of India’s installed capacity, this project strengthens India’s global position—currently fifth in hydroelectric capacity—and supports its renewable energy and grid resilience goals.