Consensus-Based Distributed Event-Triggered Communication Control for AC Microgrids

A novel distributed event-triggered control method is presented for frequency synchronization of massive distributed generators (DG) in ac microgirds. The proposed consensus-based distributed frequency control strategy based on the event-based communication mechanism is fully distributed and only triggered at their own event time, which effectively reduces the frequency of controller updates compared with continuous-time feedback control. Moreover, each DG only requires the local voltage and current measurement from its own and some nearest neighbors (but not all) for the distributed control at the last event-trigger time by using low-bandwidth communication links. The minimum requirement on communication topologies to asymptotically track desired values is devised. Simulation studies in a microgrid system of MATLAB/SimPowerSystems demonstrate the effectiveness of the proposed control method.