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Matching uneven generation patterns to varying demands for power requires flexibility in the power network. Electrical energy storage technologies now exist to complement mature generation types as well as new forms of renewable generation. Electrical energy storage can also support network management. This paper presents examples of electrical energy storage applications, together with the development status of several technologies, and introduces the regulatory, economic and commercial aspects of combining storage with sustainable generation and operation of grid-connected and standalone power networks.

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Traditional power systems were based on large centralised generation supplying electricity to consumers through transmission and distribution networks, but a high proportion of renewable generation is now connected at the distribution level, which together with substantially different consumer demand profiles is changing the way that power systems are designed and operated. Electrical energy storage technologies, including battery energy storage, can complement existing generation types as well as new forms of renewable generation, as well as supporting the development of the network infrastructure.

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