Novel Cascade Multilevel Inverter Based on H-Bridge Unit for Production of 56-Levels

Abstract

Multilevel inverters have received more attentions their considerable advantages such as high power quality, lower harmonic components, better electro- magnetic consistence, lower dv/dt and lower switching losses. Lot of research was going on multi level inverter topologies and many researchers are proposed so many multi level inverter topologies. Most of the research conducted on these topologies emphasizes on voltage stress reduction, usage of optimized number of switches for production of more number of levels at the output terminals. In this project a single phase multi level configuration based on H-Bridge units for production of 56 levels in the output terminals is proposed for analysis. Mathematical modeling and simulation studies using Simpower systems Block set of MATLAB are proposed. Switching scheme for the proposed converter circuit is designed with the help of sinusoidal pulse width modulation scheme. Total Harmonic distortion in the output voltage is evaluated using FFT tool of MATLAB SIMULINK.
Keywords: Hybrid cascaded multilevel inverter; Total harmonic Distortion; Sinusoidal Pulse width modulation; H-Bridge Units; Switching control