Power distribution network failure detecting system

The utility model relates to a power distribution network failure detecting system comprising a core control unit used for monitoring a power distribution network and a recloser arranged in the power distribution network and connected with the core control unit, wherein the system further comprises a mutual inductor and a voltage sensor, the mutual inductor and the voltage sensor respectively connected with a power supply are respectively connected at the two ends of the recloser, and the mutual inductor is connected with the core control unit through a corresponding driving module. The power distribution network failure detecting system has the advantages of analyzing and judging the position of a failure segment by detecting the pulse signal waveform in the circuit through the voltage sensor so as to control the recloser to quickly process the failure and recover the power supply of a non-failure segment, and the failure isolation and the power supply recovery of the non-failure region can be finished by one reclosing, thereby reducing the action times of the recloser and reducing the impact on the equipment and load in the circuit.