2017/08/15 by Michele Cucuzzella, Sebastian Trip, Cucuzzella, Michele +9 · 3 citations
Engineering · #Microgrid Control and Optimization #Frequency Control in Power Systems #Smart Grid Energy Management
paper · pdf · doi:10.48550/arxiv.1708.04608
In this paper a novel distributed control algorithm for current sharing and\nvoltage regulation in Direct Current (DC) microgrids is proposed. The DC\nmicrogrid is composed of several Distributed Generation units (DGUs), including\nBuck converters and current loads. The considered model permits an arbitrary\nnetwork topology and is affected by unknown load demand and modelling\nuncertainties. The proposed control strategy exploits a communication network\nto achieve proportional current sharing using a consensus-like algorithm.\nVoltage regulation is achieved by constraining the system to a suitable\nmanifold. Two robust control strategies of Sliding Mode (SM) type are developed\nto reach the desired manifold in a finite time. The proposed control scheme is\nformally analyzed, proving the achievement of proportional current sharing,\nwhile guaranteeing that the weighted average voltage of the microgrid is\nidentical to the weighted average of the voltage references.\n