The invention relates to a double-end traveling wave
distance measurement method and device suitable for a power distribution network and a storage medium, and the method comprises the steps: firstly, carrying out the preprocessing of a fault phase current traveling wave through the normalization and rough characteristic
frequency band zero-phase band-pass filtering of a double-end current traveling wave; using
spline wavelet transform to calibrate a proper modulus maximum point as initial
estimation of a wave head starting point; further estimating a wave head on the double-end
time domain original traveling wave waveform by using a threshold method, and obtaining an accurate wave head starting point through double-end amplitude interpolation correction; and finally, calculating the position of a fault point according to a double-end traveling wave
distance measurement principle. According to the method, a fault phase current waveform is preprocessed into a current traveling wave in a rough characteristic
frequency band through a zero-phase filtering means, interference outside the characteristic
frequency band is eliminated, a wave head
break point serves as a wave head starting point, the
break point is estimated step by step through a
wavelet modulus maximum value and a
signal amplitude threshold value method, and the fault phase current waveform is obtained. And more accurate approximation of the
break point is obtained through double-end amplitude interpolation, so that the
range finding precision exceeding the sampling rate limit is achieved.