
the operation whereby water is raised by means of pumps and stored for later use in one or more hydroelectric installations for the generation of electricity
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=602-01-09

At times of low electricity demand, typically at night, the National Grid has overcapacity. Since it is difficult and expensive to shut down power stations, this extra energy would have to be wasted. However, by using it to pump water back uphill into reservoirs, a small percentage of this energy can be stored as gravitational potential energy of t...
Found on
http://www.users.zetnet.co.uk/computing/MainPage/SecDepts/Physics/Resources

Hydroelectric plant that uses surplus electricity to pump water back into a high-level reservoir. In normal working conditions the water flows from this reservoir through the turbines to generate power for feeding into the grid. At times of low power demand, electricity is taken from the grid to turn the turbines into pumps that then pump the w...
Found on
https://www.encyclo.co.uk/local/21221
No exact match found.