Tongbai Pumped Storage Power Station

Tongbai Pumped Storage Power Station
CountryChina
LocationTiantai County, Zhejiang Province
Coordinates29°12′10.98″N 120°59′51.77″E / 29.2030500°N 120.9977139°E / 29.2030500; 120.9977139
StatusOperational
Construction began2000
Opening date2005–2006
Construction costUS$904.10 million
Operator(s)Shenergy Company
Upper reservoir
CreatesTongbai Upper
Total capacity12,316,000 m3 (9,985 acre⋅ft)
Lower reservoir
CreatesTongbai Lower
Total capacity12,897,000 m3 (10,456 acre⋅ft)
Power Station
Hydraulic head239 m (784 ft)
Pump-generators4 x 300 MW (400,000 hp) Francis pump turbines
Installed capacity1,200 MW (1,600,000 hp)
Annual generation2.8 billion kWh

The Tongbai Pumped Storage Power Station is a pumped-storage hydroelectric power station located 6 kilometres (3.7 mi) north of Tiantai city in Tiantai County of Zhejiang Province, China. Construction on the power station began in May 2000 and the first unit was commissioned in December 2005. The remaining three were operational by December 2006. The entire project cost US$904.10 million, of which US$320 million was provided by the World Bank. The power station operates by shifting water between an upper and lower reservoir to generate electricity. The lower reservoir was formed with the creation of the Tongbai Lower Dam on the Baizhang River. The Tongbai Upper Reservoir, which already existed before construction began, is in an adjacent valley above the east side of the lower reservoir on Tongbai Creek. During periods of low energy demand, such as at night, water is pumped from Tongbai 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. The power station is operated by Shenergy Company.[1][2]

The lower reservoir is created by a 68-metre (223 ft) tall and 420-metre (1,380 ft) long concrete-face rock-fill dam on the Baizhang River. It can hold up to 12,897,000 cubic metres (10,456 acre⋅ft) of water of which 967,860 cubic metres (784.66 acre⋅ft) can be used for power generation. The upper reservoir is created by a 37-metre (121 ft) tall and 456-metre (1,496 ft) long rock-fill dam on Tonbai Creek. It can hold up to 12,316,000 cubic metres (9,985 acre⋅ft) of water of which 10,627,000 cubic metres (8,615 acre⋅ft) can be used for power generation. Water from the upper reservoir is sent to the 1,200 MW underground power station near the lower reservoir through headrace/penstock pipes. The drop in elevation between the upper and lower reservoir affords a hydraulic head (water drop) of 239 metres (784 ft).[3]

See also

References

  1. ^ "Pumped-Storage Hydroelectric Plants in China". IndustCards. Archived from the original on 8 December 2012. Retrieved 19 July 2014.
  2. ^ "China Tongbai Pumped Storage". World Bank. Retrieved 19 July 2014.
  3. ^ "Tongbai Pumped Storage Project" (PDF). Environmental Impact Assessment. East China Investment & Design Institute. March 1999. pp. 2.2 – 2.7. Retrieved 19 July 2014.

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