Alstom, partners win contract for variable-speed pumped storage hydropower plant

Paris, June 30, 2011 — Alstom, in consortium with Hindustan Construction Co., won a contract worth more than $412.5 million by Tehri Hydro Development Corp. to install a 1,000 MW variable speed pumped storage hydropower plant on the river Bhagirathi in the state of Uttarakhand, India.

It will be India’s first pumped storage hydropower plant to use variable speed technology. Alstom’s share of the contract is worth around $260 million.

Alstom will supply four 250 MW variable speed turbine and generator units and other equipment including main inlet valves and control and protection systems. On completion, the plant’s electricity output will provide much-needed power to the country’s northern grid.

Pumped storage is the most efficient and flexible form of storing electricity on a large scale, enabling utilities to respond quickly to demand and replacing the fossil fuels traditionally used during peak demand periods with renewable, carbon-free energy. Variable speed pump turbines, which offer even greater efficiency, represent the latest innovation in pumped storage technology.

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