| Summary: | In this paper, we study the optimal configuration problem of battery energy storage (BES) for multi-energy microgrid (MEMG) in two typical modes, which considers demand response in grid-connected mode and primary frequency regulation in islanding mode. In order to maximize the function of BES in the two modes, we first present the optimization model of MEMG with demand response in grid-connected mode to make profit. Then, considering the reliability and the power quality issues of MEMG, the BES should be used to participate primary frequency regulation to maintain the stability of the system frequency. Therefore, the constraint of primary frequency regulation in islanding mode is added to the optimization model. Computation results demonstrate that the proposed optimization strategy for BES capacity configuration can effectively reduce the operation cost and enhance the primary frequency regulation capability of the MEMG.
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