Tai'an Pumped Storage Power Station | |
---|---|
Country | China |
Location | Tai'an, Shandong Province |
Coordinates | 36°13′31.54″N117°2′35.48″E / 36.2254278°N 117.0431889°E Coordinates: 36°13′31.54″N117°2′35.48″E / 36.2254278°N 117.0431889°E |
Status | Operational |
Construction began | February 2000 |
Opening date | 2005-2007 |
Operator(s) | State Grid Xinyuan Co |
Upper reservoir | |
Creates | Tai'an Upper |
Total capacity | 10,430,900 m3 (8,456.5 acre⋅ft) |
Lower reservoir | |
Creates | Dahe Reservoir |
Total capacity | 29,050,000 m3 (23,550 acre⋅ft) |
Power Station | |
Hydraulic head | 248 m (814 ft) |
Pump-generators | 4 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]
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 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]
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.
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 or piezometric head is a specific measurement of liquid pressure above a vertical datum.
Tanbara Dam is a rock-fill embankment dam on a Tone River tributary in Gunma Prefecture of Japan. It is located 14 kilometres (8.7 mi) north of Numata. It creates the upper reservoir for the 1,200 megawatts (1,600,000 hp) Tamahara Pumped Storage Power Station (玉原発電所). Construction began in 1973 and the dam was complete in 1981 while the power station was commissioned in 1986. It is 116 metres (381 ft) tall and withholds a reservoir with a storage capacity of 14,800,000 m3 (11,999 acre⋅ft). Of that capacity, 13,000,000 cubic metres (11,000 acre⋅ft) is active for power generation. The lower reservoir for the pumped-storage power station is created by the Fujiwara Dam, located 4 km (2 mi) to the northwest on another Tone River tributary. Power is generated during periods of high energy demand and pumping occurs during times when energy demand is low such as at night. The power station contains four 300 megawatts (400,000 hp) reversible Francis turbine pump-generators which serve to both pump water and generate electricity. The upper Tamahara Reservoir is at an elevation of 1,177 metres (3,862 ft) and the lower Fujiwara Reservoir is at 651 metres (2,136 ft) which affords the power station an effective hydraulic head of 518 metres (1,699 ft). When pumping, the pump-generators can move up to 210 cubic metres per second (7,400 cu ft/s) of water and when generating, they discharge up to 276 cubic metres per second (9,700 cu ft/s).
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The Qingyuan Pumped Storage Power Station is a 1,280 MW pumped-storage hydroelectric power station about 20 km (12 mi) northwest of Qingyuan in Qingxin District, Guangdong Province, China. Construction on the project began in October 2008. Six workers were killed while excavating a tunnel on 19 November 2012. The upper reservoir began impounding water in March 2013 and the first generator and all four generators were commissioned by 30 November 2015.
The Hongping Pumped Storage Power Station is a 1,200 MW pumped-storage hydroelectric power station currently under construction about 11 km (6.8 mi) northwest of Hongping in Jing'an County of Jiangxi Province, China. Construction on the project began in June 2010. The first generator was commissioned in June 2014 and a second 1,200 MW phase is planned for completion in 2017. When fully operational, the power station will have an installed capacity of 2,400 MW. The power station operates by shifting water between an upper and lower reservoir to generate electricity. The lower reservoir is located on Hebei River and the upper reservoir is located in a valley above the north side of the lower reservoir. During periods of low energy demand, such as at night, water is pumped from Hongping 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 Jiangxi Hongping Pumped Storage Ltd.
The Huanggou Pumped Storage Power Station is a 1,200 MW pumped-storage hydroelectric power station currently under construction about 90 km (56 mi) north of Mudanjiang in Hailin County of Heilongjiang Province, China. Construction on the project began on 8 May 2014. The first generator is scheduled to be commissioned in January 2019 and the project complete in January 2020. The power station operates by shifting water between an upper and lower reservoir to generate electricity. The lower reservoir, Lianhua Reservoir, is located on the Mudan River and the upper reservoir is located in a valley above the north side of the lower reservoir. During periods of low energy demand, such as at night, water is pumped from Huanggou 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 the State Grid Corporation of China.
The Lianhua Dam is a concrete-face rock-fill dam on the Mudan River in Linkou County of Heilongjiang Province, China. It is located about 95 km (59 mi) north of Mudanjiang. The 71.8 m (236 ft) tall dam serves several purposes to include hydroelectric power generation, flood control and water supply for irrigation. The dam withholds a large 4,180,000,000 m3 (3,390,000 acre⋅ft) capacity reservoir and supports a 550 MW power station. Construction on the dam began in November 1992 and its first 137.5 MW Francis turbine-generator was operational in December 1996. Two more generators were commissioned on 12 December 1997 and the remaining generator was commissioned on 28 September 1998. It is the first large modern water conservancy project in Heilongjiang. The dam's reservoir displaced 40,000 people and will serve as the lower reservoir for the Huanggou Pumped Storage Power Station when it is complete.