Multiple switching pattern for a modified reduce switch multilevel inverter: A comparison analysis

Author:

Arshad M H,Khodijah S,Ashbahani Mohamad Kajaan Nor,Mohd Nayan Norkharziana,Mat Isa Zainuddin,Ismail Baharuddin,Izati Abdullah Nor

Abstract

Abstract A primary concern of multilevel inverter is its capability to produce desired alternating voltage close to sinusoidal at the output, using multiple sources of DC voltage input. Mostly a multilevel inverter is used to generate the AC voltage from DC voltage. The aim of this paper is to investigate the output of 9 level multilevel inverter by modifying the conventional 5 levels H-bridge cascade multilevel inverter. The proposed design intending to reduce the number of switches from 16 switches to 10 switches. Implementation of different switching pattern methods; equal phase (EP), half equal phase (HEP), half height (HH) and feed forward (FF) and the related expression are presented in this paper. In the result section shows a different percentage of total harmonic distortion achieved. Out of all 4 methods, HH method suppressed distortion wave the most and resulted in the lowest THD in the proposed inverter. This paper shows that by reducing the number of switches in multilevel inverter structure maintains the same quality output as the conventional H-bridge topology. Furthermore, the manipulation of the switches firing angle contribute in decreasing the system THD.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Reference15 articles.

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1. The Technique of Voltage Level Time Division Based on Maximum Pulse Width to Reduce Total Harmonic Distortion on Multilevel Transformerless Photovoltaic Inverter (MLTPVI) System;Journal of Electrical Engineering & Technology;2022-03-22

2. Performance Analysis of Modified Nine-level Inverter with SHEPWM using an Artificial Bee Colony Algorithm;2021 4th International Iraqi Conference on Engineering Technology and Their Applications (IICETA);2021-09-21

3. Harmonic Analysis of Modified Nine-level Inverter with SHEPWM using Grey Wolf Optimization;2021 4th International Iraqi Conference on Engineering Technology and Their Applications (IICETA);2021-09-21

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