Chapter 10

Power System Energy Storage Technologies


Electrical energy storage can play an important role in electricity supply by storing off-peak energy for delivery in periods of peak demand and by helping to stabilize the generation from intermittent resources such as wind and solar power. Analysis suggests that for optimum grid stability, 15% of capacity should be based on energy storage. However, the storage of electricity has proved difficult to master. The main large-scale energy storage technologies are pumped storage hydropower, compressed-air energy storage, and, at the lower capacity range, batteries. For smaller-scale storage supercapacitors and flywheels can be used and small superconducting magnetic energy storage rings ...

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