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A simplified space-vector modulation algorithm for four-leg NPC converters

Rojas, Felix; Cardenas, Roberto; Kennel, Ralph; Clare, Jon C.; Diaz, Matias

Authors

Felix Rojas

Roberto Cardenas rcd@ieee.org

Ralph Kennel

Jon C. Clare jon.clare@nottingham.ac.uk

Matias Diaz



Abstract

To interface generation sources and loads to four-wire distribution networks is important to use power converters and modulation methods which provide high performance, flexi¬bility and reliability. To achieve these goals, this paper proposes a simple and efficient Space Vector Modulation (SVM) algorithm in α3-y coordinates for Neutral Point Clamped (NPC) converters. The proposed SVM method reduces a three-dimensional (α3-y) search of the modulating vectors into a simple two-dimensional (α3) problem. Moreover, the algorithm provides full utilisation of the dc-link voltage, full utilisation of the redundant vectors and it can be applied to any other four-leg converter topology. The proposed SVM has been successfully validated using a 6kW three-level four-leg NPC converter, achieving control over the voltages of the dc-link capacitors and simple definition of switching pattern for shaping frequency spectrum.

Journal Article Type Article
Publication Date Nov 30, 2016
Journal IEEE Transactions on Power Electronics
Print ISSN 0885-8993
Electronic ISSN 1941-0107
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 32
Issue 11
APA6 Citation Rojas, F., Cardenas, R., Kennel, R., Clare, J. C., & Diaz, M. (2016). A simplified space-vector modulation algorithm for four-leg NPC converters. IEEE Transactions on Power Electronics, 32(11), doi:10.1109/TPEL.2016.2618061
DOI https://doi.org/10.1109/TPEL.2016.2618061
Keywords NPC converters, four-leg converters, Space vec¬tor Modulation (SVM), Distributed Power Generation Systems (DPGS), Unbalanced Distribution Systems
Publisher URL http://ieeexplore.ieee.org/document/7592426/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information ©2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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