An efficient harmonic detection approach for shunt active filter based on wavelet transform

Abstract

This paper described with the harmonics detection and compensation in power system. The two accepted and impressive methods in noise and harmonic detection field are implemented in this present work. These methods are based on windowing and wavelet transforms technique. These techniques are used in the proposed method namely synchronous reference-frame algorithm. A windowing-wavelet based technique is used like a low pass filter. Now expressions of their enactment on transient response truncated overshot and fluctuation at frequency domain, the db-3 wavelet is selected for this purpose. In harmonic detection process, the identified harmonic is inserted with the help of shunt active filter based on predictive current control technique. Due to the fast transient response, this method is acceptable over the traditional Fast Fourier Transform (FFT) based filter. The accessible approach has been substantiated with MATLAB/Simulink environment. Keywords: Shunt active filter, Wavelet transform, FFT, Harmonic detection