Method of High-speed Railway Traction Nets Fault Single-ended Traveling-wave Location Based on Wavelet Transformation Adaptive Matching

Abstract

In order to reduce the influence of the transmission dispersion characteristics on the wave head detection and the wave transmission velocity measurement, put forward a new algorithm. This method combined with wavelet transform singularity and similarity algorithm, extracted the reconstruction high-frequency signal of wavelet function multi-scale decomposing structure, to calculate fault traveling-wave positioning. Got characteristic value point, calculated arrival time of traveling-wave head, obtained the reference speed of traveling-wave by simulation experiment results. Analysis result of the field test data showed that the high-speed railway traction nets fault positioning method can extract the faults characteristic effectively, and eliminate the influence of traveling-wave dispersion characteristic, and the fault positioning error is no more than 100 m.