Aiming at reactive power sharing problem due to line impedance voltage mismatch in multi-inverters paralleled microgrid system with conventional droop control method

a power sharing strategy of virtual capacitor is proposed. The method adopts an algorithm to mimic inverter output paralleled capacitor characteristic

and adaptively compensates the line impedance voltage drop to reduce circulating current and improves the power sharing ability. Droop coefficients changes and detection of point of common coupling(PCC)voltage are not needed in the method

which enhances the adaptability of the inverters. Simulation and experimental results verify the effectiveness of the proposed control strategy. This work is supported by National High Technology Research and Development Program of China(863 Program)(No. 2015AA050607).