2014•Unpublished venueRequires access

Comparison of multicarrier PWM techniques for cascaded H-bridge inverter

Prabhu Omer, Jagdish Kumar, Balwinder Singh Surjan

Abstract

Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. Multicarrier pulse-width-modulation (PWM) strategies for cascaded H-bridge (CHB) inverter are used to identify phase-shifted PWM (PSPWM) that produces almost same THD as produced by carrier disposition PWM or level-shifted PWM (LSPWM), but PSPWM has the effect of even power distribution among cells while LSPWM has the effect of uneven power distribution among cells in a CHB. Simulation for a 9-level CHB is carried out in MATLAB/SIMULINK and simulation results are presented in this paper.

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Key concepts: Pulse-width modulation, H bridge, Total harmonic distortion, Inverter, MATLAB, Power (physics), Electronic engineering, Modulation (music)