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

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 metres (236 ft) high and 577 metres (1,893 ft) long. The dam creates a reservoir that can store 6,770,000 cubic metres (239,080,294 cu ft) of water and contains an uncontrolled side-weir spillway that can discharge a design level of 536 cubic metres per second (18,929 cu ft/s).

Upper reservoir

From the lower reservoir, water is pumped up into the upper reservoir which has a normal storage capacity of 6,760,000 cubic metres (238,727,147 cu ft). 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 three 882 metres (2,894 ft) long and 7 metres (23 ft) 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 metres (652 ft) long, 21 metres (69 ft) wide and 47.7 metres (156 ft) high. After power is produced, the water is discharged back into the lower reservoir and the entire process can repeat.

Tianhuangping Pumped Storage Power Plant
Country	China
Locale	Tainhuangping, Anji County of Zhejiang Province, China
Status	Operational
Construction cost	$900 million USD
Reservoir information
Upper reservoir	Tianhuangping Upper
Reservoir capacity	6,760,000 cubic metres (238,727,147 cu ft) (Normal)
Catchment area	.327 square kilometres (0 sq mi)
Lower reservoir	Tianhuangping Lower
Reservoir capacity	6,770,000 cubic metres (239,080,294 cu ft) (Normal)
Catchment area	24.2 square kilometres (9 sq mi)
Pumped-storage station information
Penstocks	3
Pump-generators	6 x reversible Francis turbines
Hydraulic head	887 metres (2,910 ft)
Lower reservoir spillways	Controlled, side-weir
Lower reservoir spillway discharge	536 cubic metres per second (18,929 cu ft/s)
Power generation information
Installed capacity	1,836 MW
Maximum capacity	2,016 MW