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Title: Optimised phase disposition pulse-width modulation strategy for hybrid-clamped multilevel inverters using switching state sequences
Authors: Ma, M.
He, X.
Cao, W.
Song, X.
Ji, Bing
First Published: 6-May-2015
Publisher: Institution of Engineering and Technology (IET)
Citation: Power Electronics, IET, 2015, 8(7), pp. 1095-1103
Abstract: This study describes an optimised modulation strategy based on switching state sequences for the hybrid-clamped multilevel converter. Two key control variables defined as ‘phase shift angle’ and ‘switching state change’ for a five-level hybrid-clamped inverter are proposed to improve all switches’ operation, and by changing their values, different control methods can be obtained for modulation optimisation purposes. Two example methods can solve the voltage imbalance problem of the dc-link capacitors and furthermore avoid two switches’ simultaneous switching transitions and improve the inverter's performance as compared with the traditional phase disposition pulse-width modulation strategy. A 6 kW prototype inverter is developed and a range of simulation and experiments are carried out for validation. It is found that simulation and experimental results are in a good agreement and the proposed modulation strategy is verified in terms of low-order harmonic reduction.
DOI Link: 10.1049/iet-pel.2014.0748
ISSN: 1755-4543
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © The Institution of Engineering and Technology 2015. This file is distributed under the Creative Commons “Attribution Non-Commercial No Derivatives” licence, further details of which can be found via the following link:
Appears in Collections:Published Articles, Dept. of Engineering

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