Method for positioning fault of power distribution network lines

The invention discloses a method for positioning a fault of distribution network lines. The method comprises the following steps of controlling an arc suppression coil to generate a current detection signal with preset characteristic parameters after the occurrence of an earth fault; detecting current signals at detection points on each single-phase line; judging the detection point in which the current detection signal is received according to the preset characteristic parameters; and obtaining a fault point section according to the position information of the judged detection point. With the adoption of the method for positioning the fault of the distribution network lines, during the process of fault positioning, no special signal generation equipment is required to be provided, so that the cost is low; as the input current detection signal is identified according to the self-defined characteristics, the influence from the complexity of the distribution network lines is prevented; and in addition, the differentiability is high and the fault positioning accuracy is high as well.