The Guangdong Pumped Storage Power Station or Guangzhou Pumped Storage Power Station () is a

pumped-storage Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing. A PSH system stores energy in the form of gravitational potent ...

hydroelectric Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...

power station near

Guangzhou Guangzhou, Chinese postal romanization, previously romanized as Canton or Kwangchow, is the Capital city, capital and largest city of Guangdong Provinces of China, province in South China, southern China. Located on the Pearl River about nor ...

Guangdong Province ) means "wide" or "vast", and has been associated with the region since the creation of Guang Prefecture in AD 226. The name "''Guang''" ultimately came from Guangxin ( zh, labels=no, first=t, t= , s=广信), an outpost established in Han dynasty ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

. Power is generated by utilizing eight

turbines A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced can be used for generating electrical ...

, each with a capacity, totalling the installed capacity to . The generated power is sold to CLP customers in

Hong Kong Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...

. The power station was constructed in two stages, the first four turbines were completed in 1994 and the second four in 2000.

Operation

The station is composed mainly of a lower and upper reservoir and an

underground power station An underground power station is a type of hydroelectric power station constructed by excavating the major components (e.g. machine hall, penstocks, and tailrace) from rock, rather than the more common surface-based construction methods. One or mo ...

. Water for the system is derived from the

Liuxihe River The Liuxi River ( zh, s=流溪河, p=Liúxī Hé), or simply Liuxi, is a tributary of the Pearl River (China), Pearl River in China with its basin situated northeast of Guangzhou in Guangdong Province. It lies between the Beijiang River and Dongj ...

. The lower reservoir has a capacity of and is created by a tall and long gravity

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...

composed of

roller-compacted concrete Roller-compacted concrete (RCC) or rolled concrete (rollcrete) is a special blend of concrete that has essentially the same ingredients as conventional concrete but in different ratios, and increasingly with partial substitution of fly ash for po ...

. Water from this reservoir is pumped into the upper reservoir which is created by a tall and long concrete face rock-fill

embankment dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface ...

and has a capacity of . Water from the upper reservoir can then be re-released down two

penstock 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 of Scots origin, and was inherited from the earlier technology of mill pond ...

s towards the power station. The same reversible pumps that moved the water up can now generate electricity. Just before reaching the power station, the two penstocks each split off into four separate branch pipes, each feeding one of the eight reversible 300 MW turbine generators with water. Once power generation is complete, the generators can reverse, pump the water back up to the upper reservoir and resume the process over again.

References

External links

Guangdong PPS
at China Light & Power {{Energy in the People's Republic of China Energy infrastructure completed in 1994 Energy infrastructure completed in 2000 Hydroelectric power stations in Guangdong Pumped-storage hydroelectric power stations in China Dams completed in 1994 Roller-compacted concrete dams Dams in China 1994 establishments in China Underground power stations

Operation

See also

References

External links