Guangzhou Pumped Storage Power Station

Guangzhou Pumped Storage Power Station has a total capacity of 2,400MW and was developed in two stages. Hong Kong Pumped Storage Development Company, Limited (PSDC) is wholly-owned by CLP, which has contractual rights to use the equivalent of half of the first stage of the project (600MW).

A pumped storage plant uses hydro technology to store energy generated by other power stations. Storage is achieved by pumping water from a lower to an upper reservoir. The stored energy can then be recovered by running the hydro units in reverse as generators, with their output available to the grid system at times of peak demand or as backup if other units shut down unexpectedly. The pumped storage function also enables nuclear plant to remain at full base load operation despite fluctuations in system demand from day to night. Energy generated at the Daya Bay nuclear power station can, for example, be used to pump water to the upper reservoir overnight when system demand is low.

CLP participated in the development of the first stage of the pumped storage power station through PSDC. We use the contracted pumped storage capacity to support the operation and security of the Hong Kong electricity supply system.