Tianhuangping Pumped Storage Power Station

The Tianhuangping Pumped Storage Power Station is a pumped-storage power station in Tianhuangping, Anji County of Huzhou, Zhejiang Province, China. The power station has an installed capacity of 1836 MW utilizing 6 reversible Francis turbines. Construction began in 1993 and the power station was completed in 2004.

Tianhuangping Dam
Situated on the Daxi Creek, the Tianhuangping Dam creates the power station's lower reservoir. The concrete face rock-fill dam is 72 m high and 577 m long. The dam creates a reservoir that can store 6770000 m3 of water and contains an uncontrolled side-weir spillway that can discharge a design level of 536 m3/s.

Upper reservoir
From the lower reservoir, water is pumped up into the upper reservoir which has a normal storage capacity of 6760000 m3. The upper reservoir is artificial and cut into the mountain and created with the assistance of four saddle dams. When power is being generated, the water leaves the reservoir and falls through two 882 m long and 7 m diameter penstocks down towards the power station which is above the lower reservoir. Before reaching the reversible turbines, the water branches off into six branch pipes.

Power station
The six branch pipes feed water into the six turbines. Each reversible Francis turbine has a 306 MW installed capacity and 336 MW maximum capacity. The turbines and generators are stored in an underground power house measuring 198.7 m long, 21 m wide and 47.7 m high. After power is produced, the water is discharged back into the lower reservoir and the entire process can repeat.