Estudo Comparativo de Técnicas Utilizadas na Detecção de Faltas em Linhas de Transmissão pela Abordagem Baseada na Análise Espectral do Sinal

This article presents the result of comparison between three techniques used to detect travelling wave signal for power lines fault location. The methods have in common identification dominant frequencies traveling waves at transmission line terminals as transients propagate along line. Among processing considered, two are more traditional, Short Time Fourier Transform (STFT) and Wavelet (WT). third technique is Hilbert-Huang (THH), a new approach based on an elaborate adaptive method data analysis non-linear non-stationary processes. spectrogram whose provides parameters, among them, instant arrival measuring terminal end shows that can accurately extract time wave.