Study on Operation Strategy of Islanded Microgrid Cluster Voltage Recovery Based on Distributed Hierarchical Control

Wind and solar energy storage as a microgrid cluster, usually large scale, a single control technology is difficult to perfectly adapt to large-scale power generation system, and it faces the risk of frequency and bus voltage overruns under heavy load access, so it is often used to be able to flexibly adapt to the large-scale power generation of hierarchical control strategy. To address the above problems, a distributed hierarchical control strategy with a multi-intelligent body consistency algorithm is proposed. The primary control adopts the VSG control as the basis of the whole system, and for the voltage offset, frequency offset and uneven power distribution problems generated by the primary control, the secondary control based on the distributed consistency algorithm is adopted for regulating the VSG parameters to realize the cooperative control of the microgrid system, and for the economy of the microgrid operation, the optimal economic dispatch control strategy is adopted in the tertiary control to realize the stable operation and economic optimization of the microgrid system as a whole. Finally, the proposed control strategy is validated in MATLAB.