Distribution network substation outgoing line load side wiring method for improving utilization rate of main transformer

The invention provides a distribution network substation outgoing line load side wiring method for improving the utilization rate of a main transformer, and belongs to the field of substations. A distribution network substation outgoing line load side wiring method for improving the utilization rate of main transformers is applied to segmented annular wiring of N main transformers, an N-to-2N segment annular wiring mode is adopted for connection, connecting lines between non-adjacent main transformers are increased, and N-to-N (N-1) segment annular wiring is formed by the N main transformers. According to the wiring system provided by the invention, the problem of overload of the main transformer receiving load transfer can be avoided under the condition that the transformer substation provided with four or more main transformers is N-1; according to the wiring system, the design limit value of the load rate of the main transformer under N-1 safety criterion verification is ensured, so that the utilization ra