Phase-shifted carrier modulation techniques for cascaded H-bridge multilevel converters

Title: Phase-shifted carrier modulation techniques for cascaded H-bridge multilevel converters
Creator: Townsend, Christopher D.; Summers, Terrence J.; Betz, Robert E.
Relation: IEEE Transactions on Industrial Electronics Vol. 62, Issue 11, p. 6684-6696
Publisher Link: http://dx.doi.org/10.1109/TIE.2015.2442516
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Resource Type: journal article
Date: 2015
Description: Phase-shifted carrier modulation is an industry standard in its application to multilevel H-bridge converters. The major advantage of this scheme over level-shifted and space vector modulation schemes is its inherent ability to evenly distribute losses between semiconductor devices. However, until now, its implementation has necessitated a capacitor voltage balancing scheme that degrades converter harmonic performance. This paper develops two phase-shifted carrier modulation schemes that avoid harmonic degradation by exploiting an extra degree of freedom in the available switching states. Simulation and experimental results are presented that confirm the correct operation of the modulation strategies.
Subject: control strategy; modulation strategy; multilevel converters; StatCom; voltage balancing
Identifier: http://hdl.handle.net/1959.13/1314104
Identifier: uon:22706
Identifier: ISSN:0278-0046
Language: eng
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