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Bailianhe Pumped Storage Power Station
The Bailianhe Pumped Storage Power Station is a pumped-storage hydroelectric power station located east of Huanggang in Hubei Province, China. It was constructed between 2004 and 2009 and has a installed capacity. The power station operates by shifting water between an upper and lower reservoir to generate electricity. For this project, only the upper reservoir had to be created as an existing reservoir, the Bailianhe Reservoir, was used as the lower. During periods of low energy demand, such as at night, water is pumped from Bailianhe Reservoir up to the upper reservoir. When energy demand is high, the water is released back down to the lower reservoir but the pump turbines that pumped the water up now reverse mode and serve as generators to produce electricity. The process is repeated as necessary and the plant serves as a peaking power plant.〔
The Bailianhe Upper Reservoir was created with the construction of a tall concrete-face rock-fill dam. It has a crest length of and can storage up to of which can be used for power generation. The lower Bailianhe Reservoir was constructed on the Lotus River in the 1960s and was created by an embankment dam. It has a storage capacity of . The power station contains four Francis pump turbines and the change in elevation between the upper and lower reservoirs affords a rated hydraulic head of . While generating electricity, the pump-generators produce 967 million kWh annually but consume 1,289 kWh when pumping. Pumping when energy is low in demand and cheap helps cover the excess cost.〔(【引用サイトリンク】url=http://www.gzbgj.com/english/article.asp?id=744 )〕〔(【引用サイトリンク】url=http://www.industcards.com/ps-china.htm )〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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