Generalized Three-Level Optimal Pulse Patterns With Lower Harmonic Distortion

Optimized pulse patterns (OPPs) minimize the harmonic distortions of inductive loads. To simplify the analysis and computation, quarter- and half-wave symmetry is typically imposed. Moreover, for three-level converters, the switch positions are required to be non-negative in the positive half-wave o...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2020-06, Vol.35 (6), p.5741-5752
Main Authors: Birth, Annika, Geyer, Tobias, Mouton, Hendrik du Toit, Dorfling, Martinus
Format: Article
Language:English
Subjects:
Converters
Half-wave symmetry
Harmonic analysis
Harmonic distortion
Inverters
Linear programming
medium-voltage drives
Modulation
Optimization
optimized pulse patterns (OPPs)
quarter-wave symmetry
Switches
Symmetry
synchronous optimal pulsewidth modulation
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Summary:Optimized pulse patterns (OPPs) minimize the harmonic distortions of inductive loads. To simplify the analysis and computation, quarter- and half-wave symmetry is typically imposed. Moreover, for three-level converters, the switch positions are required to be non-negative in the positive half-wave of the fundamental period. This article investigates the impact of these restrictions on the harmonic distortions. By relaxing the symmetry requirements and by allowing also negative switch positions in the positive half-wave of the fundamental period, the current distortions can be reduced by up to one-third compared to the traditional OPP formulation.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2019.2953819