7. Distributed Event-Triggered Control with Less Communication

For several reasons, particularly due to the mismatch in the feeder impedance, accurate power sharing in islanded microgrids is a challenging task. This chapter introduces a distributed event-triggered power sharing control strategy. The suggested technique adaptively regulates the virtual impedances at both fundamental positive/negative sequence and harmonic frequencies and, therefore, accurately shares the reactive, unbalanced, and harmonics powers among distributed generation (DG) units. The method requires no information of feeder impedance and involves exchanging information among units at only event-triggered times, which reduces the communication burden without affecting the system’s performance. The stability and inter-event interval are analyzed. Finally, experimental results are presented to validate the effectiveness of the scheme.