Based on the line-mode traveling wave mutated single - phase to Ground Fault Location Method

The present invention discloses a distribution network ground fault location method of molding line based on traveling wave mutation, comprising the steps of: (A) in the first end of the three-phase power distribution network while injecting the same voltage pulse, and detects the three-phase return voltage traveling wave; (B) the phase voltage lines in step (a) obtained Polly with Sagami transformation matrix to the modulus, then get line-mode voltage traveling wave; (C) in step (B) obtained by line-mode voltage traveling-wave differential, we get the first non-zero mutation point in time, and then get a traveling wave propagation time; (D) the step (C) obtained by substituting the propagation time ranging formula, calculated fault distance. After the end of the first-phase of the present invention by simultaneous injection of high-voltage pulse mode voltage detection line mutations traveling wave fault location, distribution network to solve the unbalanced load caused by the fault of the pseudo-problem.