Distribution line single-phase earth fault line selection method and computer readable storage medium

The invention provides a distribution line single-phase earth fault line selection method based on phase current traveling wave comparison. The method comprises the following steps: collecting three-phase current traveling waves on a distribution line, and taking a bus pointing line as a current positive direction; when a single-phase earth fault occurs in the distribution line, comparing the amplitude and the polarity relationship of the difference before and after the three-phase current traveling wave fault; when the amplitude of one phase of current traveling wave difference is greater than the amplitude of the other two phases of current traveling wave differences by more than 1.5 times, and the polarity of the phase of current traveling wave difference with the maximum amplitude is opposite to the polarity of the other two phases of current traveling wave differences, judging that the fault occurs on the line on the load side of the measurement point and the phase with the maximum current traveling wave