📋 Tender Overview
Scope :
Construction of a new pumped storage project that will feature the world’s highest hydraulic head.
The Tiantai pumped storage power station in Tiantai County, Zhajiang Province, is a major project of the Medium and Long-term Development Plan for Pumped Storage (2021-2035) included in the 14th Five-Year Plan. It is planned to install 4x425MW reversible hydraulic generators, with a total installed capacity of 1700MW.
Upon completion, the station will be used for peak load regulation, valley filling, frequency regulation, phase modulation, power storage, and emergency use for Zhejiang's power grid, and to provide flexible dispatching capacity for the East China Grid.
Contractors involved :
China Power Construction Group (Power China) East China Survey and Design Research Institute (East China Institute) secured a £32m ($44m) contract to perform survey and design works for the project in February 2022.
East China Institute also prepared an environmental impact assessment (EIA) report for the 500kV switch station of the pumped-storage power project.
Sinohydro Bureau 5 has been engaged to perform geological exploration as well as construct the access and ventilation tunnels.
Location and site details
The Tiantai pumped storage power station is located near Tantou in Tiantai county, Zhejiang province, China.
The project site lies 240km and 150km away from Shanghai and Hangzhou, respectively.
Reservoir details
The upper reservoir of the pumped storage power project will have a storage capacity of 6.86 million cubic metres (Mcm) at a normal water level of 953m.
The lower reservoir will have an active storage capacity of 10.34Mcm at a normal water level of 204m.
Tiantai pumped storage power station make-up
The Tiantai pumped storage power station will be equipped with four 425MW power units, each of which will comprise a reversible Francis pump turbine unit placed in an underground powerhouse. The power plant will be designed to operate at a net water head of 725m.
The upper and lower reservoirs will be connected through a 483.4m-long inclined shaft for water diversion.
Other components of the project will include access and ventilation tunnels, and a 500kV switch station near the powerhouse.
Infrastructure facilities
The project also involves the construction of a 5.4km-long road to access the lower reservoir. The access road will comprise three bridges.
Power evacuation
The electricity generated by the Tiantai pumped storage power station will be evacuated into the Zhejiang power grid through a 500kV transmission line.
