Distributed Event-Triggered Control for Single-Bus DC Microgrids

In this paper, we have considered a DC microgrid with a sparse digital communication network, then by proposing a distributed event-triggered control strategy to realize voltage regulation and proportional current sharing in a DC microgrid. According to the designed control strategy, each distributed generator sends interaction information to its neighboring generators only when the triggering condition is satisfied. The regulation of voltage and proportional sharing of current can be achieved with the designed control strategy, which is analyzed via the Lyapunov stability method. The proposed control strategy is validated by a DC microgrid in the simulation.

I. Introduction

Microgrids (MGs) are an important concept developed to deal with the generation, storage, control and management of electricity converted from renewable energy sources [1]. DC MGs have received a lot of attention due to the absence of reactive powers and the avoidance of excessive energy transformations between the generation units of renewable energy systems and DC loads.