Simulation on Harmonic Spectrum of Inverter Output Voltage Based on MATLAB

Abstract

Simulation model of inverter is established in MATLAB/SIMULINK on the basis of the given concepts of system, simulation and models in this paper. We studied the output harmonic characteristics of the inverter, analyzed the influence on output waveform caused by different carrier ratio and modulation depth. The results of simulation show that SPWM (sine pulse width modulation) can effectively suppress low-frequency harmonic when applying low-frequency modulation and Special Harmonic Eliminate(SHE) can effectively suppress low-frequency harmonic when using high-frequency modulation.