Enhancement of output voltage quality of multi level inverter using series active filter

In modern power electronic world, inverter is widely used to satisfy industrial needs, such as Adjustable Speed Drives (ASD), arc furnaces, UPS and used in renewable energy sector in order to integrate solar panel into grid. During this conversion process, waveform distortion induced in the output side of inverter. The waveform distortion occurs due to harmonics created by those devices, which results in devastation effects in industry and in power grid. In order to avoid those problems, Seven Level Inverter is proposed and controlled by Phase Shift Carrier Pulse Width Modulation (PSC-PWM) technique. The output voltage quality of this Multi Level Inverter is to be enhanced with help of Series Active Filter (SeAF), which injects compensation voltage generated by control theory of instantaneous real and reactive power theory by means of series injection transformer. In this paper, the effectiveness of Series Active Filter has to be analyzed in terms of voltage harmonic performance under different modulation indexes and switching frequencies the help of MATLAB/Simulink 2010.