A VSG parallel system control method is proposed to address the issue of circulating current caused by inconsis-tent line impedances between virtual synchronous generators and loads during the parallel operation of multiple VSGs in microgrids.An adaptive virtual impedance module based on fuzzy PI control is designed to quickly compensate for the volt-age difference at the parallel inverter ports,suppress circulating currents,and achieve accurate power allocation.Finally the effectiveness of the proposed control strategy is verified through MATLAB/Simulink simulation.
维普
万方数据