THD analysis of SPWM & THPWM Controlled Three phase Voltage Source Inverter

The aim of this paper is to determine the Total harmonic distortion (THD) of three phase voltage source inverter (VSI) fed R-L load. The modulation Techniques used is Sinusoidal pulse width modulation (SPWM) and third harmonic pulse width modulation (THPWM). The Carrier frequency is varied to analyze its effect on Current THD and Voltage THD.This paper also presents the comparison of SPWM and THPWM controlled Inverter in terms of THD. The simulation result shows THPWM has better performance when compared to SPWM. The simulation of circuit is done by using MATLAB/Simulink