THD Minimization Based Asymmetrical Cascade Multilevel Inverter with Different Modulation Techniques

Abstract— In this paper mainly focused on the implementation of novel topology in a series connection of battery voltages in 9-level asymmetrical cascaded multilevel inverter (ACMLI) help to reduced the total harmonic distortion (THD) output level and higher the number of different level generated. Multilevel inverters have unique structure which makes it possible to reach high voltages with less harmonic content and lower EMI. The harmonic content of the output voltage waveform decreases as the number of output voltage increases. This requires less number of components, and gate drive circuit as compared to other multilevel inverters. The paper presents of different types of modulation techniques based multicarrier level shifted pulse width modulation (PWM) and Finally simulation results of asymmetrical cascaded seven-level multilevel topology are carried out using MATLAB/simulink R2013a software version.

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