On June 1, 2022, the East China Research Institute, a subsidiary of POWERCHINA, was in charge of the survey and design, and the Zhejiang Tiantai Pumped Storage Project, where the Fifth and Twelve Hydropower Bureaus were responsible for the main construction tasks, held a groundbreaking ceremony, marking the official start of the construction of the main project of the power station. .

The Tiantai pumped storage power station project is a key implementation project of the “14th Five-Year Plan” and a major construction project planned during the “14th Five-Year Plan” period of Zhejiang Province. It is also Tiantai County. It is a major project that integrates into the integrated development strategy of the Yangtze River Delta and builds an "important window". The power station is located in Tiantai County, Zhejiang Province, with an installed capacity of 1,700 MW. The rated water head of the power station is 724 meters, which is the highest in the world. The single unit capacity is 425,000 kilowatts, ranking first in China. The length of the upper and lower diversion inclined shafts is 483.4 meters. During the construction process, a number of records will be set, and the construction level of pumped storage power stations will reach a new height in the world. The main buildings of the pivot project are composed of upper reservoir, lower reservoir, water delivery system, underground powerhouse and switch station.

It is planned that the first unit of the rooftop pumped storage unit will be put into operation in December 2025, and all units will be put into operation in September 2026. After completion, it is estimated that the annual power generation will be 1.7 billion kWh, which can save about 520,000 tons of coal consumption, and reduce about 1.04 million tons of carbon dioxide emissions, with significant environmental benefits. The power station mainly undertakes the tasks of peak regulation, valley filling, frequency regulation, phase regulation, energy storage and emergency backup of Zhejiang Power Grid, and provides flexible dispatching capabilities for East China Power Grid. Editor / Xu Shengpeng