Spectral analysis of electric current in compact fluorescent lamps

This work presents an analysis of electric current signal in compact fluorescent lamps (CFLs). Electrical signals are measured in two circuits, one that corresponds to the CFL shunt connected with the AC source and another one that incorporates a control system into the CFL. Such control system works as a power factor correction (PFC) and is designed by employing a boost converter and a current controller. Signals are analyzed in terms of frequency-based representations oriented to estimate the power spectral density (PSD). In this study, three approaches are employed: Fourier transform, periodogram and a window-based PSD.  The goal of this work is to show that more complex PSD estimation methods can provide useful information for studying the quality energy in electric power systems, which is comparable with traditional approaches.