Relay protection method and device for distributed power distribution network, electronic equipment and medium

The invention relates to the technical field of data monitoring, in particular to a distributed power distribution network relay protection method and device, electronic equipment and a medium, and the method comprises the steps: obtaining the actual supply data corresponding to each substitute line, the actual supply data comprising the number of actual supply equipment, the actual supply proportion and the type of the actual supply equipment; based on the actual supply equipment number, the actual supply proportion and the actual supply equipment type corresponding to each substitute line, determining the line grade of each substitute line; determining a supply parameter limit value of each substitute line based on the line grade of each substitute line and the first mapping relation; and obtaining an actual working parameter corresponding to each substitute line and a historical working parameter of the fault line, and determining a target substitute line from the plurality of substitute lines according to