Single-phase earth fault location device of power distribution network based on DC signal detector

The invention discloses a single-phase earth fault location device of a power distribution network based on a DC signal detector. The single-phase earth fault location device comprises a high-voltage DC signal source and a DC signal detection unit. The high-voltage DC signal source comprises a voltage inverter, a transformer, a rectifier bridge and a filter, wherein the voltage inverter, the transformer, the rectifier bridge and the filter are connected in sequence; and the input end of the voltage inverter is externally connected with a vehicle-mounted DC voltage. The DC signal detection unit comprises a Hall sensor, a DC signal detector and an alarm indication lamp, wherein the output end of the Hall sensor is connected to the input end of the DC signal detector; and the output end of the DC signal detector is connected to the alarm indication lamp. The single-phase earth fault location device provided by the invention has the advantages of mature technology and high reliability.