Research and Demonstration Verification of Flexible Interconnection Operation Control and Fault Defense Strategies for Microgrid Groups Based on Multiflow Fusion

In this paper, the requirements of digital transformation of distribution network are analyzed, the concept of “energy-information-control-service” multi-flow fusion of distribution network is proposed, and the multi-channel fusion characteristics of micro-grid flexible interconnection in distribution transformer station are analyzed. The microgrid control strategy and its switching strategy, the control strategy of the flexible interconnection device between the microgrids, the coordinated control strategy of the microgrids, the fault prevention strategy of the flexible interconnection microgrids, and the influence of multi-flow fusion on the above control strategy are proposed respectively. Combined with the Jingshan microgrid group flexible interconnection demonstration project, the energy flow of the Jingshan microgrid group demonstration project is analyzed, the information flow and control flow architecture are established, and multiple services of the microgrid group are developed in combination with the distribution automation cloud master station demonstration project, and the effectiveness of the microgrid group flexible interconnection operation control and fault prevention strategy is verified by the demonstration project.