基于小波变换的电气化铁路谐波检测

Harmonic detection of electrified railway based on wavelet transform

为了提高电气化铁路谐波检测准确度,提出一种基于小波变换的电气化铁路谐波检测方法。首先分析电气化铁路谐波检测原理,并采集电气化铁路谐波信号;然后采用小波变换对电气化铁路谐波信号进行分解和去噪,得到无噪的电气化铁路谐波信号;最后采用递推最小二乘法对电气化铁路谐波进行检测,并在Matlab2017平台上进行电气化铁路谐波检测仿真模拟实验。结果表明,该方法的电气化铁路谐波检测准确度高,不仅减少了电气化铁路谐波检测误差,而且电气化铁路谐波检测的实时性好,谐波检测的整体结果要优于当前其他电气化铁路谐波检测方法,具有广泛的应用前景。

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 railways are better than those of other current harmonic detection methods of electrified railways, and it has broad application prospects.