Power vacancy phenomenon appears when a low voltage micro grid transitions from the grid connected to the island mode

resulting in micro grid can not maintain voltage and frequency stability. In this paper

a power management control scheme based on double-droops control strategy is proposed for low-voltage micro grid system.The proposed control method adds a layer of droop control to the voltage response of the DC bus

while improving the coupling droop control. The control scheme can work under the island mode and the grid mode to adjust the output power of the micro power supply automatically. In addition

the droop controlled VSI systems solves the problem of the switching unsmoothed between the island mode and the grid mode

which is of the great significance to improve the power quality and power supply reliability of the micro grid. The proposed scheme above is validated by MATLAB simulation.