Distributed averaging control for voltage regulation and current sharing in DC microgrids

In this letter we propose a new distributed controlscheme, achieving current sharing and average voltage regulationin Direct Current (DC) microgrids. The considered DC microgridis composed of several Distributed Generation Units (DGUs)interconnected through resistive-inductive power lines. EachDGU includes a generic energy source that supplies a localcurrent load through a DC-DC buck converter. The proposeddistributed control scheme achieves current sharing and averagevoltage regulation, independently of the initial condition of thecontrolled microgrid. Moreover, the proposed solution requiresonly measurements of the generated currents, and is independentof the microgrid parameters and the topology of the usedcommunication network, facilitating Plug-and-Play capabilities.Global convergence to a desired steady state is proven andsimulations indicate a good performance