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.
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