Distributed Event-Triggered Control of DC Microgrids With Input Saturation and Time Delay Constraints

Abstract

This article proposes a novel distributed event-triggered secondary control approach subject to input saturation and time delay in communication links among distributed generators (DGs) to achieve both voltage restoration and proportional current sharing in islanded DC microgrids (MGs). In contrast to periodic communication, sampled-data exchanges only occur when the triggering condition is satisfied. Therefore, communication instants and computation burdens will be reduced significantly. Compared with the existing event-triggered mechanism, this article investigates conditions for achieving consensus in the presence of both input saturation and time delay constraints. The Lyapunov synthesis is employed to derive the stability and convergence analysis of the proposed event-triggering condition and ensure the Zeno-free of the system. Finally, the effectiveness of the proposed controller is validated by simulating its performance under various scenarios in an islanded DC MG using the MATLAB/SimPowerSystems Toolbox.