Wavelet-Fourier analysis of electric signal disturbances
Juan Carlos Montañó, Dolores D. Borras, Juan Carlos Bravo Rodríguez, Manuel V. Castilla, Antonio López, Jaime Gutierrez · Renewable Energy and Power Quality Journal · 2017
The Fourier transform usually has been used in the past for analysis of stationary and periodic signals. Its interest is the knowledge of spectral components existing in a waveform; it doesn't matter the moment where they happen. However, when the time localization of the spectral components is needed, the Wavelet Transform (WT) can be used to obtain the optimal time-frequency representation of the signal. In this paper, the joint wavelet-Fourier transform has been proposed for detecting, analyzing and compacting electrical disturbances. Finally, results of experiments have been included.