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pumped storage power plants

Synonyms: pumped-storage power stations, pump power station

reegle definition:

A pumping memory power station (also called pump power station) is a special form of a storage power station that stores electric energy in form of the potential energy of water.

Wikipedia definition:

Pumped-storage hydroelectricity (PSH) is a type of hydroelectric power generation used by some power plants for load balancing. The method stores energy in the form of potential energy of water, pumped from a lower elevation reservoir to a higher elevation. Low-cost off-peak electric power is used to run the pumps. During periods of high electrical demand, the stored water is released through turbines to produce electric power. Although the losses of the pumping process makes the plant a net consumer of energy overall, the system increases revenue by selling more electricity during periods of peak demand, when electricity prices are highest. Pumped storage is the largest-capacity form of grid energy storage available, and, as of March 2012, the Electric Power Research Institute (EPRI) reports that PSH accounts for more than 99% of bulk storage capacity worldwide, representing around 127,000 MW. PSH reported energy efficiency varies in practice between 70% and 80%, with some claiming up to 87%.

Source: dbpedia

ClimateTechWiki definition:

Next to the other energy storage technologies, such as phase change materials, batteries and CAES, pumped hydro is another option for energy storage. Pumped hydro storage uses two water reservoirs which are separated vertically. In times of excess electricity, often off peak hours, water is pumped from the lower reservoir to the upper reservoir. When required, the water flow is reversed and guided through turbines to generate electricity. Pumped hydro is the most developed energy storage technology, with facilities dating from the 1890s in Italy and Switzerland.

Source: ClimateTechWiki

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