This paper present a Shunt Active Filter (SAF) based on Variable Index Pulse Width Modulation (VIPWM). In the proposed method of Pulse Width Modulation (PWM), the triangular wave is derived by integration of reference signals. This method has two advantages, the first one is that the triangular signal contains the information of the signal to be obtained in output and the second advantages is that its amplitude is varied in proportion to the amplitude of the reference signal. Therefore, in our proposed PWM method, the modulation index is varied according to the variation of the reference signal, so it is termed as Variable Index Pulse Width Modulation. Furthermore, in order to demonstrate the validity of the proposed method, the results of this way compare with results of Space Vector Modulation (SVM) based on Hysteresis Current Control (HCC) technique.

Keywords