Tianhuangping Pumped Storage Power Station

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Tianhuangping Pumped Storage Power Station
JiangNanTianChi.JPG
Upper reservoir
CountryChina
Location Tianhuangping, Anji County of Zhejiang Province, China
Coordinates 30°28′13″N119°36′21″E / 30.47028°N 119.60583°E / 30.47028; 119.60583 Coordinates: 30°28′13″N119°36′21″E / 30.47028°N 119.60583°E / 30.47028; 119.60583
StatusOperational
Construction began1993
Opening date2004
Construction cost$900 million USD
Upper reservoir
CreatesTianhuangping Upper
Total capacity6,760,000 m3 (5,480 acre⋅ft) (Normal)
Lower reservoir
CreatesTianhuangping Lower
Total capacity6,770,000 m3 (239,000,000 cu ft) (Normal)
Power Station
Hydraulic head 887 m (2,910 ft)
Pump-generators6 reversible Francis turbines
Installed capacity 1,836 MW
2,016 MW (Planned)

The Tianhuangping Pumped Storage Power Station is a pumped-storage power station in Tianhuangping, Anji County of Zhejiang Province, China. The power station has an installed capacity of 1,836 megawatts (2,462,000 hp) utilizing 6 reversible Francis turbines. Construction began in 1993 and the power station was completed in 2004. [1]

Anji County Place in Zhejiang, Peoples Republic of China

Anji County  is a county in the prefecture-level city of Huzhou in northwestern Zhejiang province, People's Republic of China, with a population of 461,800 as of the end of 2013. Anji county is well known for its bamboo, containing as it does 60,000 hectares of bamboo groves, with over 40 different species of bamboo. It has been designated a pilot county for ecological and green building construction.

China Country in East Asia

China, officially the People's Republic of China (PRC), is a country in East Asia and the world's most populous country, with a population of around 1.404 billion. Covering approximately 9,600,000 square kilometers (3,700,000 sq mi), it is the third- or fourth-largest country by total area. Governed by the Communist Party of China, the state exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities, and the special administrative regions of Hong Kong and Macau.

Francis turbine type of water turbine that was developed by James B. Francis in Lowell, Massachusetts

The Francis turbine is a type of water turbine that was developed by James B. Francis in Lowell, Massachusetts. It is an inward-flow reaction turbine that combines radial and axial flow concepts.

Contents

Operation

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 (5,490 acre⋅ft) of water and contains an uncontrolled side-weir spillway that can discharge a design level of 536 cubic metres per second (18,900 cu ft/s). [2]

The Daxi Creek is a tributary of the Xitiao River in Anji County of Zhejiang Province, China. It is interrupted by the Tianhuangping Dam.

Dam A barrier that stops or restricts the flow of surface or underground streams

A dam is a barrier that stops or restricts the flow of water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect water or for storage of water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC.

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 (5,480 acre⋅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 two 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. [2]

Penstock Intake structure that controls water flow to turbines or sewerage systems

A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydro turbines and sewerage systems. The term is inherited from the earlier technology of mill ponds and watermills.

Power station

The six branch pipes feed water into the six turbines. Each reversible Francis turbine has a 306 megawatts (410,000 hp) installed capacity and 336 megawatts (451,000 hp) 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. [2]

See also

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References

  1. "Tianhuangping Pumped-Storage Hydro Plant, China". Power-Technology.com. Retrieved 3 January 2011.[ unreliable source? ]
  2. 1 2 3 "Tianhuangping Pumped Storage Power Station" (PDF). Chinese National Committee on Large Dams. Retrieved 3 January 2011.