Abstract
The control of storage devices plays an important role in stable operation of distributed AC microgrids. A multi-objective distributed secondary control scheme of storage devices is proposed. Firstly, to maintain the frequency and voltage regulation and ensure proportional reactive power sharing, a distributed consensus scheme is adopted for the operation of battery energy storage systems. Secondly, to prolong the cycle life of the battery, an improved droop control strategy combined with state of charge balancing is proposed, where each battery agent only requires and shares information with its networked neighbors in the communication topology. Finally, an islanded AC microgrid model with four battery energy storage systems is built and simulation results demonstrate the effectiveness of the proposed consensus strategy.
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