Distributed Event-Triggered Control of DC Microgrids

Abstract

A dc microgrid needs to be well controlled to fully unlock its potential. This article presents a distributed event-triggered control algorithm for accurate load current sharing and voltage profile regulation of dc microgrid. According to the control design, a subsystem controller only communicates with its neighboring controller(s) when a certain condition evaluated using local measurements is triggered. Thereafter, control signals are updated when such events are triggered locally or at its neighboring subsystem(s). Since the algorithm can significantly lower the requirements for communication and computation, it is efficient and easy to implement. Lyapunov synthesis is performed to show that the reduced communication does not compromise the control performance. Simulation with a detailed switch-level dc microgrid model further validates the effectiveness of the proposed control algorithm.