Abstract

Abstract – Among the various types of multilevel inverters,cascaded multilevel inverter emerges to be better at highpower rating because of its modular character ofmodulation, control and protection necessities of each Hbridge inverters. Cascaded Multilevel Inverter (CMLI)produces a medium voltage output derived from sequentialconnections of power cells that employs configurations ofstandard low-voltage components. This distinctive featureenables to obtain better quality output voltages and inputcurrents with exceptional accessibility owing to theirinherent component redundancy. In this paper, HybridModulation Technique (HMT) has been proposed toexamine the performance characteristics of Cascaded Fivelevel Inverter.Many new modulation techniques for MLItopologies have been developed to provide an accuratesinusoid in steady state. The major challenges inmodulation techniques used in MLI topologies are toprovide high power quality and minimum switchingfrequency. This paper deals with the methodology tominimize the Total Harmonic Distortion (THD) generatedin Multilevel Sinusoidal Pulse Width modulation(MSPWM) schemes with low computational involvedness.MATLAB-SIMULINK block set with logical elements isoffered adopting sequential switching hybrid-modulation(SSHM) algorithm with PWM circulation. Even thoughonly the five-level case is presented, the projected methodcan be equally applied to any number of voltage levels, anynumber of phases and switching transitions.Keywords: - CMLI, Hybrid Modulation, Total HarmonicDistortion.I