pumped hydroelectric storage


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pumped hydroelectric storage

[′pəmpt ¦hī·drō·i′lek·trik ′stȯr·ij]
(electricity)
A method of energy storage in which excess electrical energy produced at times of low demand is used to pump water into a reservoir, and this water is released at times of high demand to operate hydroelectric generators.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The UK currently has 2800 MW of electricity storage capacity in the form of pumped hydroelectric storage. According to National Grid we will need 8000 MW of electricity storage capacity by 2025 if the penetration of wind power in the network is 30%.