Decentralized intelligent spare power automatic switching system and method suitable for low-voltage side of power distribution network

The invention provides a decentralized intelligent spare power automatic switching system and method suitable for a low-voltage side of a power distribution network, and the system comprises at least two control stations, each control station has the capability of independently processing faults in the station, and a master-slave relation between the control stations is removed. The situation that the whole system breaks down due to disconnection of data links between the control stations, and power supply of a power grid is affected is avoided. According to the invention, a traditional centralized control working mode is abandoned, the control stations are mutually independent, can independently process various faults in the stations, do not interfere with each other and are mutually associated, and when a fault occurs, the control station with the fault can be connected with the control station with the spare power switching line, and an optimal line is selected from the control station; and then the two co