Communication-Resilient Microgrid Distributed Frequency Control with an Event-Triggered Mechanism

Distributed control methods have been widely applied to the control and operation of microgrids due to their robustness and flexibility. Considering the distributed structure, the performance of distributed control depends greatly on the communication among DGs. It is necessary to study distributed control under weak communication conditions (e.g., low communication rates and frequent communication failures). This paper proposes a communication-resilient distributed frequency control strategy for microgrids. The proposed control contains an event-triggered update mechanism of the communication data among DGs and the communication topology, which ensures adaptability to limited communication rates and enhances the resiliency in face of communication failures. Moreover, the optimal design of the control parameters (i.e., the optimization of communication topologies and local controllers) is studied, which further improves the performance and practicability of the control strategy. The effectiveness and advantages of the proposed control are verified by simulation based on MATLAB/Simulink under various conditions.