Classification of voltage sag based on wavelet transform and wavelet network

Abstract

Voltage sag due to line fault, transformer energizing and induction motor starting was analyzed in this paper. The respective sag waveform was presented. The analysis results illustrate that interference source would be identified based on characteristics of voltage sag. An interference source identification method is brought forward by using wavelet transform and wavelet network. The wavelet Daubechies 6 is used to extract the character vector. The voltage sag can be classified by using the wavelet network.