Harmonic Reduction for Three Phase Voltage Source Inverters

Abstract

Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width Modulation (SVPWM) are the most popular modulation strategies for Multilevel inverters. This paper provides the theoretical analysis and simulation results of SPWM and SVPWM inverters. This software implementation is performed by using MAT LAB/SIMULATION software. This paper gives comparison between SVPWM three Phase two & three level inverters. Also this paper gives comparison between three level SVPWM & SPWM inverters. Two level inverters is the basic technique to implement any level. It is becomes difficult in high voltage & high power applications due to the increased switching losses and limited rating of the dc link voltage. Multilevel inverters are used in high voltage and high power applications with less harmonic contents. The simulation study reveals that three levels SVPWM inverter generates less THD compared to two-level SVPWM & Three level SPWM inverters.