Staircase Modulation using GWO Technique for CHB-MLI with Symmetrical and Asymmetrical Mode

Staircase Modulation using GWO Technique for CHB-MLI with Symmetrical and Asymmetrical Mode

© 2021 by IJETT Journal
Volume-69 Issue-8
Year of Publication : 2021
Authors : Asala. S. AL-Dmour, Hussein. D. AL-Majali, Ziyad. S. AL-Majali
DOI :  10.14445/22315381/IJETT-V69I8P209

How to Cite?

Asala. S. AL-Dmour, Hussein. D. AL-Majali, Ziyad. S. AL-Majali, "Staircase Modulation using GWO Technique for CHB-MLI with Symmetrical and Asymmetrical Mode," International Journal of Engineering Trends and Technology, vol. 69, no. 8, pp. 71-80, 2021. Crossref,

In this research, the Grey Wolf Optimizer GWO algorithm through staircase modulation strategy is utilized to estimate switching angles and bridge DC voltage (input variables) of five-level and seven-level cascade H-Bridge inverters. Estimated values make sure that total harmonics distortion THD of the selected inverters will be minimized as possible. The simulation results using MATLAB/Simulink software and harmonic spectrum using Fast Fourier Transform window for five and seven-level CHB inverter in symmetric (equal DC voltage) and asymmetric (un-equal DC voltage) mode have been presented based on the magnitude of THD in output voltage. The analysis has been done for both R and RC loads.

Cascaded H-bridge multilevel inverter (CHBMLI), Grey Wolf Optimizer (GWO) algorithm, Staircase modulation, Total Harmonic Distortion (THD).

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