NDLI: Particle swarm optimisation-based modified SHE method for cascaded H-bridge multilevel inverters

Content Provider	IET Digital Library
Author	Etesami, Mohammadhossein Ghasemi, Negareh Vilathgamuwa, Don Mahinda Malan, Wynand Louis
Abstract	Low-frequency switching strategies are considered as an effective way of achieving efficient performance in multilevel inverters. Selective harmonic elimination (SHE) is a modulation technique of this category which gives a superior outcome suppressing low-order detrimental harmonics. Limited number of decision variables offered by SHE in the corresponding non-linear equations hinders obtaining high-quality waveforms. Current research is targeted on two distinct objectives for cascaded H-bridge inverters. First objective is to obtain a high-quality output signal. The second one is accomplishing a realistic solution with compromised voltage quality where a broad operating range becomes mathematically challenging. These aims are achievable by deploying additional degree of freedom in the equation set. In other words, the introduction of floating voltage levels contributes to effectively doubling the number of variables. The enhancement of output waveforms is presented through several illustrations and comparisons. Subsequent laboratory implementation validates the proposal and confirms its feasibility.
Starting Page	18
Ending Page	28
Page Count	11
ISSN	17554535
Volume Number	10
e-ISSN	17554543
Issue Number	Issue 1, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/10/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0864
Journal	IET Power Electronics
Publisher Date	2017-01-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bridge Circuit Cascade Network Cascaded H-bridge Multilevel Inverters Floating Voltage Levels Harmonics Suppression Invertors Low-frequency Switching Strategy Low-order Detrimental Harmonics Mathematical Analysis Modulation Technique Nonlinear Equation Optimisation Technique Particle Swarm Optimisation Power Conversion Harmonics Power Electronics Power Supply Selective Harmonic Elimination SHE Method Supervisory Circuit Switching Converter Voltage Quality
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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