A distributed decentralized cooperative control scheme for microgrids

A hybrid series-parallel microgrid structure and its distributed decentralized cooperative control strategy are introduced in this paper. In the hybrid series-parallel microgrids, the distributed generators (DGs) are concatenated in parallel to form a paralleled-connected generation (PCG) module. Further, the hybrid series-parallel microgrids consist of multiple PCG modules in series. For the considered microgrids, a distributed decentralized cooperative control strategy is proposed. For DGs in the same PCG module, low-bandwidth communications are applied to obtain convergence control of the system. Meanwhile, different PCG modules realize autonomous synchronization in a communication-free manner. Thus, the proposed distributed decentralized cooperative control method is a low-bandwidth communication approach. Moreover, it is immune to single-point fault and communication failure. Finally, the feasibility of the proposed controller for the considered microgrids is verified by stability and simulations.