Qingyuan Pumped Storage Power Station

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Qingyuan Pumped Storage Power Station
CountryChina
Location Qingyuan, Qingxin District, Guangdong Province
Coordinates 23°44′11.07″N112°51′43.54″E / 23.7364083°N 112.8620944°E / 23.7364083; 112.8620944 Coordinates: 23°44′11.07″N112°51′43.54″E / 23.7364083°N 112.8620944°E / 23.7364083; 112.8620944
StatusOperational
Construction began2008
Opening date2015
Operator(s) China Southern Power Grid Company
Upper reservoir
CreatesQingyuan Upper
Total capacity11,798,000 m3 (9,565 acre⋅ft)
Lower reservoir
CreatesQingyuan Lower
Total capacity14,953,200 m3 (12,122.8 acre⋅ft)
Power Station
Hydraulic head 502.7 m (1,649 ft)
Pump-generators4 x 320 MW Francis pump turbines
Installed capacity 1,280 MW

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. [1] The upper reservoir began impounding water in March 2013 and the first generator and all four generators were commissioned by 30 November 2015. [2]

Qingyuan Prefecture-level city in Guangdong, Peoples Republic of China

Qingyuan, formerly romanized as Tsingyun, is a prefecture-level city in northern Guangdong province, China, on the banks of the Bei or North River. During the 2010 census, its total population was 3,698,412, out of whom 1,510,044 lived in the urbanized Qingcheng and Qingxin districts. The primary spoken language is Cantonese. Covering 19,015 km2 (7,342 sq mi), Qingyuan is Guangdong's largest prefecture-level division by land area, and it borders Guangzhou and Foshan to the south, Shaoguan to the east and northeast, Zhaoqing to the south and southwest, and Hunan province and Guangxi Zhuang Autonomous Region to the north. The urban core is surrounded by mountainous areas but is directly connected with Guangzhou and the Pearl River Delta by Highway 107.

Qingxin District District in Guangdong, Peoples Republic of China

Qingxin District, formerly Qingxin County, is a district of Qingyuan City, in northwest-central Guangdong province, China.

The power station operates by shifting water between an upper and lower reservoir to generate electricity. The lower reservoir is located on Qin River and the upper reservoir is located in a valley above the west side of the lower reservoir. During periods of low energy demand, such as at night, water is pumped from Qingyuan 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 China Southern Power Grid Company. [3]

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 75.9 m (249 ft) tall and 279 m (915 ft) long rock-fill dam on the Pan Wen River. It can withhold up to 14,953,200 m3 (12,122.8 acre⋅ft) of water, of which 10,580,800 m3 (8,578.0 acre⋅ft) can be pumped to the upper reservoir. The upper reservoir is created by a 54 m (177 ft) tall and 214 m (702 ft) long rock-fill dam. It can withhold up to 11,798,000 m3 (9,565 acre⋅ft) of water, of which 10,544,600 m3 (8,548.6 acre⋅ft) can be used for power production. Water from the upper reservoir is sent to the underground power station down near the lower reservoir through a 1,753 m (5,751 ft) long headrace/penstock pipe. The power station contains four 320 MW Francis pump turbines. The difference in elevation between the upper and lower reservoir affords a hydraulic head (water drop) of 502.7 m (1,649 ft). [4]

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.

See also

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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.

References

  1. "Guangdong Qingyuan Pumped Storage Power Station accident occurred six deaths" (in Chinese). Caixin. 20 November 2012. Retrieved 23 July 2014.
  2. "Qingyuan Pumped Storage Power Plant put into operation" (in Chinese). GD China News. 30 November 2015. Retrieved 16 February 2016.
  3. "Qingyuan Pumped Storage Power Station". Guangdong Hydropower Planning & Design Institute. 19 December 2013. Retrieved 23 July 2014.
  4. "Qingyuan Pumped Storage Power Station General layout" (PDF) (in Chinese). Guangdong Provincial Electric Power Survey and Design Institute of Water Conservancy. Retrieved 23 July 2014.