PERFORMANCE INVESTIGATION OF PULSE-WIDTH MODULATION TECHNIQUES FOR MULTI-LEVEL INVERTERS

Abstract

This work proposes a comparison study of various pulse width modulation (PWM) schemes using symmetrical arrangement of five level H-bridge multilevel inverter (CHBMLI) in order to find an optimized output voltage quality with lower harmonic distortion. It studies performance evaluation of the most widely used PWM schemes for three-phase voltage source inverters such as In-Phase Disposition (in-PD), Phase Opposition Disposition(POD), Alternate Phase Opposition Disposition(APOD), Variable frequency, Phase Shifted and Space Vector PWM (SVPWM) on RL load . MATLAB/SIMULINK software is used for simulation. This paper is concerned with various principles of PWM, and its use in inverters. It compares various types of modulation techniques widely used in the present scenario. The carried out simulation studies shows that space vector PWM configuration provides high output voltage with very low total harmonic distortion (THD) and better bus utilization using less switching devices.