Load unbalance in the microgrid can lead to voltage unbalance

which will reduce the power supply quality of the microgrid. To solve this problem

this paper firstly describes the microgrid inverter control method. Then the reason of voltage unbalance in the microgrid is analyzed based on the droop control. To ensure the voltage quality can meet the power supply standard requirements at the microgrid inverter output port and the point of common coupling

an energy storage inverter based unbalance voltage compensation method is proposed

which can simultaneously compensate the unbalance voltage at the inverter output port and the point of common coupling. The proposed strategy is described in details and its performance is verified by simulation in the MATLAB/Simulink software environment and the experiments on the microgrid experimental platform.