Abstract
Communication bandwidth inconsistency between traditional secondary control and tertiary control may decrease the economic efficiency of a microgrid. To solve the problem, this study proposes a fully distributed cooperative strategy in secondary level to minimize the operation cost in an AC microgrid and achieve the synchronization of the voltage and frequency. The proposed strategy is based on the incremental cost consensus algorithm with a modified droop control algorithm, and it utilizes the first-order discrete consensus algorithm with a virtual leader to optimize the generation cost. In addition, it can effectively deal with communication failures and improve the robustness of the system. Case studies verified the effectiveness of the proposed method by comparing it with traditional methods.
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