Synchronous island control with significant contribution from wind power generation

Power system islanding is gaining interest as a way to improve power supply security and power quality. This has been facilitated by continuing advancements in communications and digital control. For maximum flexibility, power system islands must be capable of operating with different generation and power network topologies. Furthermore, the implication of high capacities of renewable resources on the ability of power system islands to keep within frequency and voltage limits must be considered. This is especially the case for synchronous islanded operation, whereby the island's reconnection to the grid is aided, and out-of-synchronism re-closure avoided, by holding the island in phase with the main power system while not electrically connected. As this requires tight frequency control to remain within even relaxed synchronization limits, shown by the authors to be in the order of ± 60°, the issues surrounding continuously variable renewable power sources is evident.

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