Tai'an Pumped Storage Power Station

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Tai'an Pumped Storage Power Station
CountryChina
Location Tai'an, Shandong Province
Coordinates 36°13′31.54″N117°2′35.48″E / 36.2254278°N 117.0431889°E / 36.2254278; 117.0431889 Coordinates: 36°13′31.54″N117°2′35.48″E / 36.2254278°N 117.0431889°E / 36.2254278; 117.0431889
StatusOperational
Construction beganFebruary 2000
Opening date2005-2007
Operator(s)State Grid Xinyuan Co
Upper reservoir
CreatesTai'an Upper
Total capacity10,430,900 m3 (8,456.5 acre⋅ft)
Lower reservoir
CreatesDahe Reservoir
Total capacity29,050,000 m3 (23,550 acre⋅ft)
Power Station
Hydraulic head 248 m (814 ft)
Pump-generators4 x 250 MW Francis pump turbines
Installed capacity 1,000 MW
Annual generation 1.3 billion kWh

The Tai'an Pumped Storage Power Station is a 1,000 MW pumped-storage hydroelectric power station located in the city of Tai'an in Shandong Province, China. Construction on the project began in February 2000 and the upper reservoir began to fill in May 2005. The four generators were commissioned between December 2005 and August 2007. The power station operates by shifting water between an upper and lower reservoir to generate electricity. The lower reservoir, Dahe Reservoir, was originally built in 1960 but repaired extensively for the project. The Tai'an Upper Reservoir is located in a valley above the east side of the lower reservoir. During periods of low energy demand, such as at night, water is pumped from Tai'an Lower 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. It is operated by State Grid Xinyuan Co. [1]

Taian Prefecture-level city in Shandong, Peoples Republic of China

Tai'an is a prefecture-level city in western Shandong province of the People's Republic of China. Centered on Mount Tai, the city borders the provincial capital of Jinan to the north, Zibo to the east, Linyi to the southeast, Liaocheng to the extreme west and Jining to the south. To the west, Tai'an is separated from the province of Henan by the Yellow River.

Peaking power plant power plant, that generally runs only when there is a high demand

Peaking power plants, also known as peaker plants, and occasionally just "peakers", are power plants that generally run only when there is a high demand, known as peak demand, for electricity. Because they supply power only occasionally, the power supplied commands a much higher price per kilowatt hour than base load power. Peak load power plants are dispatched in combination with base load power plants, which supply a dependable and consistent amount of electricity, to meet the minimum demand.

The lower reservoir is created by a 22 m (72 ft) tall and 773 m (2,536 ft) long earth-fill dam on the Pan Wen River, known as Dahe Reservoir which was first constructred in 1950s or 1960s. It can withhold up to 22,347,000 m3 (18,117 acre⋅ft) of water. The upper reservoir is created by a 99.8 m (327 ft) tall and 413.8 m (1,358 ft) long concrete-face rock-fill dam. It can withhold up to 10,430,900 m3 (8,456.5 acre⋅ft) of water, of which 8,900,000 m3 (7,200 acre⋅ft) can be used for power production. Water from the upper reservoir is sent to the 1,000 MW underground power station down near the lower reservoir through two 569.15–577.10 m (1,867.3–1,893.4 ft) long headrace/penstock pipes. The drop in elevation between the upper and lower reservoir affords a hydraulic head (water drop) of 248 m (814 ft). [2] [3]

Underground power station

An underground power station is a type of hydroelectric power station constructed by excavating the major components from rock, rather than the more common surface-based construction methods.

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.

Hydraulic head Specific measurement of liquid pressure above a geodetic datum

Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum.

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Lianhua Dam dam in Linkou County of Heilongjiang Province

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References

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