Abstract: Aiming at the problems of uneven power distribution and poor stability of grid AC/DC microgrid，a

new adaptive coordinated control strategy was proposed to improve the stability and power distribution accuracy of

AC/DC microgrid（MGs）system.First，for converters connectingAC microgrids and DC microgrids，a control strategy based on the synchronverter and virtual DC machine（VDCM）for the converters connecting the AC and DC MGs was proposed，which is consisted of a power distribution controller，an adaptive virtual governor and an adaptive virtual inertia regulator. Following，in order to enhance the system stability performance，the parameter design approach of the adaptive virtual inertia and virtual governor-gain was proposed accordingly，in which，the adaptive virtual inertia and virtual governor-gain are comprehensively determined by the frequency，DC voltage，virtual rotor speed and rate of change of the frequency and DC voltage.After that，the small-signal stability of the proposed control system was analyzed to guide the design and selection of controller parameters. Finally，simulation and experimental results verify the effectiveness of the proposed method.

      Key words: DC voltage stability；power distribution；virtual inertia；virtual governor-gain；frequency