Selective harmonic elimination (SHE) based 3-phase multilevel voltage source inverter (VSI) for standalone applications

Shanono, Ibrahim Haruna and Nor Rul Hasma, Abdullah and Hamdan, Daniyal and Aisha, Muhammad (2019) Selective harmonic elimination (SHE) based 3-phase multilevel voltage source inverter (VSI) for standalone applications. SN Applied Sciences, 1 (1670). pp. 1-15. ISSN 2523-3963 (Print); 2523-3971 (Online). (Published)

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Abstract

The breakthroughs in power electronics semiconductor technology have led to the raised in popularity of Multi-level Voltage Source Inverters, which is the reason industries and researchers are relentlessly working towards extending it to both medium and high-power applications. Consequently, this paper presents a modified Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM) controlled three-phase 5-level Multi-level Inverter (MLI) topology. The work is an extension of a single-phase topology proposed by the authors. The uniqueness of the proposed topology is that it comprises of six Cascaded H-bridge modules (two modules per phase) that are powered through a single direct current (DC) source, hence eliminating the need for multiple DC sources. In addition, conventional 5-level MLI has two switching angles (n = 2), which restricts its harmonic elimination capability to one (n = 1) lower order harmonics. This study removes that restriction by utilising the concept of multiple switching per step, resulting in the superimposing of 12 notches (n = 12) on the output voltage at the 3/9 distribution ratio. With the fundamental switching SHE-PWM, twelve non-linear, transcendental equations are generated, and they are optimally solved using the Hybrid Coded Genetic Algorithm to eliminate 11 (n − 1) lower-order harmonics. The low-switching frequency results in less electromagnetic interference as well as reduced switching loss, which improves the overall inverter efficiency. The topology has less output Total Harmonics Distortion, fewer components, and lower weight and cost than conventional topologies. The circuit was designed and validated through simulations performed in PSIM software.

Item Type:	Article
Uncontrolled Keywords:	Total harmonic distortion (THD), Selective harmonic elimination (SHE), Reduced device count, Multi-level inverter
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division:	Institute of Postgraduate Studies Faculty of Electrical and Electronic Engineering Technology Faculty of Mechanical & Manufacturing Engineering
Depositing User:	Noorul Farina Arifin
Date Deposited:	25 May 2022 08:43
Last Modified:	25 May 2022 08:43
URI:	http://umpir.ump.edu.my/id/eprint/34250
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