Distributed secondary control strategy of islanded microgridunder dynamic event-triggered mechanism

There are many problems such as relying on periodic communication and excessive communication redundancy in microgrid system using traditional distributed secondary control. In order to alleviate communication pressure, a distributed collaborative control strategy for islanded DC microgrid under dynamic event-triggered mechanism is propoesd. The microgrid system with multiple distributed generators is taken as the research object, and the multi-agent system theory is used to take voltage and current as the evaluation target. By evaluating the event-trigger condition, the continuous communication and Zeno behavior of distributed power sources are fundamentally freed. Since dynamic event-triggered condition contains a dynamic item, it can avoid the occurrence of excessive triggering and completely exclude the occurrence of Zeno behavior compared to static event-triggered scheme. The feasibility of the control strategy is proved by Lyapunov stability theory, and the absence of Zeno behavior is proved. Finally, MATLAB/Simulink simulation is used to verify the effectiveness of the proposed method.