Decentralized Virtual Impedance-based Circulating Current Suppression Control for Islanded Microgrids

Parallel connected inverters in islanded mode, are getting momentous attention due to their ability increase the power distribution and reliability of a system. When there different ratings Distributed Generation (DG) units, they will operate parallel connection output voltages, impedance mismatch, or phase that can cause current flow between DG units. The magnitude this circulating sometimes be very large damage also losses affect power-sharing accuracy, quality, efficiency Microgrid (MG) Droop control, improved droop virtual control techniques modifications technique widely used suppress current. However, addition each inverter compensate is resistive inductive nature. nature always causes certain voltage drop, whereas delay for voltage. Both problems addressed by proposed mechanism paper. Negative resistance, along with impedance, utilized strategy. maintained as achieve good load sharing MGs. simulation results validate scheme.