Transformer Based 15 Level MLI for PVCELL Applications

Abstract

This study presents a novel topology for multilevel inverters so called cascaded transformer inverter (CTRSI). This topology consists of one DC source and several single-phase transformers. Each single-phase transformers generates three levels with four semiconductor switches and only two switches for all transformers alter  the direction of single DC source.Whereas each single-phase transformers in conventional cascaded transformer multilevel inverter includes more  switches. Hence, CTRSI has the advantage of a reduced number of components compared with conventional cascaded transformer multilevel inverter. Simulation results carried out by MATLAB/SIMULINK.The results show that the proposed inverter topology is able to reach high-quality output voltages. THD of output voltage is verified using FFT analsysis tool

Keywords: multilevel inverter; transformer; three phase; PWM