Harmonic detection of electrified railway based on wavelet transform

In order to improve the accuracy of harmonic detection in electrified railway, a harmonic detection method for electrified railway based on wavelet transform is proposed. Firstly, the principle of harmonic detection of electrified railway is analyzed, and the harmonic signal of electrified railway is collected. Then the harmonic signal of electrified railway is decomposed and denoised by wavelet transform, and the noise-free harmonic signal of electrified railway is obtained. Finally, the recursive least square method is used to detect the harmonic of electrified railway, and the harmonic detection of electrified railway is simulated on the platform of Matlab 2017. The results of real simulation experiments show that this method has high accuracy in harmonic detection of electrified railways, reduces the error of harmonic detection of electrified railways, and has good real-time performance the overall results of harmonic detection of electrified railway are better than those of other current harmonic detection methods of electrified railway, and it has broad application prospects.(from magazine Electrotechnical Application 6/2019 on theoretical analysis.)


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