Charging gun automatic power adjustment adaptation method, device and system

The invention discloses a charging gun automatic power adjustment adaptation method, device and system, and the method comprises the steps: obtaining the information of each charging gun, including the current charging power of the charging gun and the state of charge of a battery of a charged vehicle; setting an operation control condition and a power release condition of the total power of the charging station; and circularly judging whether the current total power of the charging station meets a control or release condition or not, and performing power limit adjustment on all the charging guns according to a judgment result and in combination with the information of each charging gun. The method can provide distribution transformer safe operation support for a charging station operator, assists the charging station operator in participating in load side demand response, maximally guarantees the charging experience of a charging user, and is of great significance in lean management of a power grid, guarante