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

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...

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Veröffentlicht in:IET power electronics Jg. 10; H. 1; S. 18 - 28
Hauptverfasser: Etesami, Mohammadhossein, Ghasemi, Negareh, Vilathgamuwa, Don Mahinda, Malan, Wynand Louis
Format: Journal Article
Sprache:Englisch
Veröffentlicht: The Institution of Engineering and Technology 20.01.2017
Schlagworte:
bridge circuits
cascade networks
cascaded H‐bridge multilevel inverters
Electric potential
Electronics
floating voltage levels
Harmonics
harmonics suppression
Inverters
invertors
low‐frequency switching strategies
low‐order detrimental harmonics
Mathematical analysis
modulation technique
Multilevel
nonlinear equations
particle swarm optimisation
power conversion harmonics
selective harmonic elimination
SHE method
switching convertors
Voltage
voltage quality
Waveforms
voltage quality
cascade networks
low-frequency switching strategies
particle swarm optimisation
bridge circuits
modulation technique
power conversion harmonics
floating voltage levels
low-order detrimental harmonics
switching convertors
nonlinear equations
invertors
selective harmonic elimination
SHE method
harmonics suppression
cascaded H-bridge multilevel inverters
ISSN:1755-4535, 1755-4543
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Zusammenfassung: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.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1755-4535
1755-4543
DOI:10.1049/iet-pel.2015.0864