China's Tiantai Pumped Storage Power Station Fully Operational, Setting Multiple Industry Records
2026-06-26 11:20
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en.Wedoany.com Reported - At 23:59 on June 25, with the last unit successfully completing its 15-day trial operation, the Zhejiang Tiantai Pumped Storage Power Station, with a total installed capacity of 1.7 million kilowatts, achieved full commercial operation.

This power station boasts the world's highest rated water head and China's largest single-unit capacity among pumped storage facilities. It is also the first pumped storage power station in China to achieve full operation during the "15th Five-Year Plan" period. The full commissioning marks a major leap for China in ultra-high head, large-capacity pumped storage technology, adding a "regulator" to accelerate the construction of a new-type power system.

Located in Tiantai County, Taizhou City, Zhejiang Province, the Tiantai Pumped Storage Power Station is invested and constructed by China Three Gorges Corporation. With a rated water head of 724 meters, it ranks first globally among similar projects. It is equipped with four reversible pump-turbine generator units, each with a capacity of 425,000 kilowatts, making it the largest single-unit capacity in China's pumped storage sector. The single-stage inclined shaft for water conveyance reaches a length of 483 meters, setting a domestic record for similar projects.

It is understood that upon full completion, the Tiantai Pumped Storage Power Station will primarily undertake tasks such as peak shaving, valley filling, frequency regulation, phase modulation, energy storage, and emergency backup for the Zhejiang power grid. It is expected to provide approximately 1.7 billion kilowatt-hours of clean electricity annually, meeting the yearly living electricity needs of about 1.6 million people.

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