Consensus only control in DC microgrids

Abstract

Voltage droop control for DC microgrids has limited power/current sharing capabilities. Although droop complemented with a consensus control loop can achieve desired power/current sharing, the resulting voltage deviation may need correction. We propose a consensus only control that achieves proportional current sharing and simultaneously avoids large voltage deviations. The proposed technique is evaluated against several others using a constant impedance network model. The impacts of communication delays and power-sharing performances are also briefly discussed.