Distributed Event-Triggered Control for Current Sharing in DC Microgrid With Random Packet Losses

To achieve stable operation and current sharing in dc microgrids with communication networks of random packet losses, this article proposes a distributed event-triggered control (ETC) strategy based on data sampling mechanism and combined measurement. The proposed ETC consensus protocol achieves mean-square consensus of the distributed renewable power generation units (RGUs) by coupling the sampling interval, control gain, and packet loss probability. Moreover, the independent triggering of individual RGUs reduces communication burden during the control process and lowers the update frequency of converters. The proposed ETC strategy has the advantages of having fewer parameters, utilizing periodic data sampling mechanisms, avoiding the Zeno phenomenon in the control system and continuously monitoring the system state. Finally, detailed experimental tests are presented to demonstrate that the proposed distributed ETC strategy exhibits good capabilities in current sharing and robustness against random packet loss.