Droop control in decentralized inverter-based AC microgrid and the analysis of the effect of different types of feeder impedances

The most well-known approach for parallel inverter operation is droop control, which is employed in the control of inverters of the power flow in the islanded microgrids or grid connected system according to the different load conditions without using any critical communication line and also useful in integrating several energy sources to meet the active and reactive power requirements of loads. In this paper, the droop control is implemented in the parallel operations of decentralized inverters, and analysis has been done with different types of feeder impedance and their X/R ratios and the parallel operation providing proportional and accurate sharing of active and reactive power. The proposed droop control is validated using Matlab/Simulink. The simulation results show that the suggested droop control approach can satisfactorily manage voltage, frequency, active and reactive power in an AC microgrid.