Enhanced Power sharing of Droop controlled Differently rated Inverters in Standalone AC Microgrid

The mismatched output impedance between the unequally rated distributed generator-based inverters (DG-inverters) leads to inaccurate power-sharing, circulating current flow between the DG-inverters in standalone AC microgrid. So, this paper proposes a precisely sized virtual impedances-based droop control method for the differently rated DG-inverters operating in a microgrid to overcome the cited issues. Two differently rated DG-inverters based a standalone AC microgrid modelled with the consideration of the proposed study and simulated in MATLAB/Simulink environment and verified with the OPAL-RT 4510 real-time simulator to ensure the efficacy of the proposed research. The obtained results confirm enhanced accurate power-sharing among the differently rated DG-inverters with almost no circulating current flow. Thus, improving the overall performance of the standalone AC microgrid.