Harmonic wave analysis and disturbance localization method of charging pile based on wavelet Adaline improvement
Aiming at the problem that it is difficult to obtain the fundamental wave frequency of Adaline network in harmonic wave detection of complex signals,a harmonic wave analysis method combining wavelet reconstruction and improved Adaline network is proposed and applied to harmonic analysis of charging piles.Firstly,Mallat algorithm is used to decompose the original signal,and then the detail signal is reconstructed to achieve disturbance localization.The approximate signal is reconstructed to obtain the denoised original signal and fundamental wave signal,and the frequency is obtained through the fundamental wave.Secondly,the phase extraction algorithm of Adline network is optimized to make it compatible with all phase ranges.The denoised original signal is detected for harmonic wave amplitude and its corresponding phase through the optimized Adaline network.The comprehensive error is 0.766％,which is 28.642％ higher than the precision of the traditional Adaline model.Finally,the method is applied to the charging pile model to realize harmonic wave detection and accurately locate the disturbance occurrence period,further demonste the applicability of the method.
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