World's Largest Hybrid Pumped Storage Power Plant Under Construction in Sichuan, China
The Lianghekou dam project in China's Sichuan province is nearing completion, combining conventional hydropower with pumped storage. Recently, key milestones were achieved, including the completion of an underground power station excavation and the pouring of the first concrete for a lower reservoir. The facility will feature four reversible turbine units of 300 megawatts each, totaling a capacity of 4,200 megawatts, making it the largest hybrid pumped storage system globally. It is designed to absorb surplus energy from 7 gigawatts of renewable capacity, expected to generate approximately 1.4 terawatt-hours annually.
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The Lianghekou dam in western Sichuan, China, is progressing towards becoming the world's largest hybrid pumped storage project. It combines conventional hydropower with pumped storage. Recent milestones include the completion of an underground power station excavation on February 22 and the initial concrete pour for the lower reservoir at Yagen I.
The pumped storage will have four reversible turbine units of 300 megawatts each, adding to the dam's existing 3,000 megawatt hydropower capacity for a total of 4,200 megawatts. The facility will utilize surplus energy from 7 gigawatts of renewable capacity, producing an estimated 1.4 terawatt-hours of electricity annually.
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