Group charging system and power distribution method and device thereof

The invention relates to a group charging system and a power distribution method and device thereof, and belongs to the technical field of electric vehicle charging facilities. The method comprises the steps of judging whether a power grid is in a power consumption peak period or not; when the power grid is in the power consumption peak period, calculating the total required power of the group charging system, and taking the smaller value between the total required power and the available power allocated to the group charging system by the power grid as the allocable total power allocation amount of the group charging system, wherein the charging power allocated to each charging terminal with the charging requirement in the group charging system is the product of the required charging power of the charging terminal, the required proportionality coefficient corresponding to the charging terminal and the cluster proportionality coefficient. According to the method, no matter how large the electric vehicle needi