Comparative admittance-based analysis for different droop control approaches in DC microgrids

摘要: In DC microgrids, virtual resistance based droop control is broadly used as the fundamental coordination method. As guarantees load sharing effect in steady states, output admittance determines dynamic response of converters transient which critical stability analysis and system design. So far, two different approaches (i.e. V-I I–V droop) are proposed. Although they can achieve same steady-state power fully compliable with each other, characteristics not due to significant difference architecture. this paper, a comparative admittance-based carried out between these approaches. State-space models more general analytical established derive droop-controlled converter microgrids. Simulations impedance measurement using PLECS validate results.