An adaptive event-triggered secondary regulation strategy for microgrids with communication link faults

This paper investigates the event-triggered secondary regulation problem for islanded alternating-current (AC) microgrids with unknown communication link faults. In order to handle unknown time-varying communication link faults and avoid utilizing global information, a distributed secondary regulation strategy is proposed, which achieves voltage and frequency regulations, as well as power sharing. Meanwhile, to save system resources and relieve the communication burden, an adaptive event-triggered mechanism is designed. Finally, an islanded AC microgrid test system is built in MATLAB/SimPowerSystems to validate the proposed strategy. It indicates that the proposed strategy highly reduces the controller updates and increases the reliability of system.