Distribution network fault processing method based on relay protection and multiple reclosing locking

The invention discloses a distribution network fault processing method based on relay protection and multiple reclosing locking, and the method comprises the following steps: 1, setting fixed values of a pole-mounted circuit breaker according to an overcurrent protection fixed value of a transformer substation outlet circuit breaker, the fixed values including a current fixed value and a time fixed value, and the larger the current fixed value close to the transformer substation side is, the longer the time fixed value is; and step 2, according to the switch action time, setting the constant value of the distribution line circuit breaker according to the level difference, the current constant values of the overcurrent I section, the overcurrent II section and the overcurrent III section are sequentially reduced from the power supply side to the load side, and the time constant value is sequentially increased. According to the invention, on-site isolation of relay protection and self-recovery after faults occu