A Survey of Techniques Used to Control Microgrid Generation and Storage during Island Operation

A microgrid is a cluster of interconnected distributed generators, loads and intermediate storage units that cooperate with each other to be collectively treated by the grid as a controllable load or generator. Power quality events and pre-set conditions will make the microgrid disconnect from the main grid and operate as a separate island. This paper enumerates and discusses the issues concerning the island operation of microgrids. The microsources and storage device should co-operate with each other to maintain the integrity of the islanded microgrid. Six co-operation approaches proposed by various authors are presented. The strategies are then compared based on their applicability to different control requirements.

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