Distributed Event-Driven Power Sharing Control for CCVSI-Based Distributed Generators in AC Islanded Microgrids

This paper presents a novel distributed event-driven control strategy that will regulate the powers of massive current-controlled voltage source inverter (CCVSI)-based distributed generators in an ac microgird. The proposed distributed power sharing control strategy based on the event-driven mechanism is fully distributed and only driven at their own event time, which effectively reduces the frequency of controller updates compared with continuous-time feedback control. Moreover, each CCVSI-based DG only requires the local voltage and current measurement from its own and some nearest neighbors (but not all) for the distributed power sharing control at the last event-driven time by using low-bandwidth communication links and the alternative iterative algorithm is employed to update the control inputs to restore the active and reactive to desired values for further reducing the consumption of computing and communication resources to some extent. The Lyapunov technique is employed to devise the stability and convergence analysis of the proposed dynamic event triggering conditions. The effectiveness of the proposed control strategy is verified under various scenarios by a modified IEEE 34-bus test network in MATLAB/SimPowerSystems.