A new space-vector-modulation algorithm for a three-level four-leg NPC inverter

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

Abstract

For power conversion systems interfaced to 4-wire supplies, four-leg converters have become a standard solution. A four-leg converter allows good compensation of zero-sequence harmonics and full utilization of the dc-link voltage. These are very important features when unbalanced and/or non-linear loads are connected to the system. This paper proposes a 3D-SVM algorithm and provides a comprehensive analysis of the algorithm implemented on a three-level, four-leg NPC converter. The algorithm allows a simple definition of the different switching patterns and enables balancing of the dc-link capacitor voltages using the redundancies of the converter states. A resonant controller is selected as the control strategy to validate the proposed SVM algorithm in a 6kW experimental rig.

Citation

Rojas, F., Kennel, R., Cardenas, R., Clare, J. C., & Diaz, M. (in press). A new space-vector-modulation algorithm for a three-level four-leg NPC inverter. IEEE Transactions on Energy Conversion, PP(99), https://doi.org/10.1109/TEC.2016.2605076

• Journal Article Type: Article
• Acceptance Date: Aug 20, 2016
• Online Publication Date: Sep 1, 2016
• Deposit Date: Oct 19, 2016
• Publicly Available Date: Oct 19, 2016
• Journal: IEEE Transactions on Energy Conversion
• Print ISSN: 0885-8969
• Electronic ISSN: 0885-8969
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: PP
• Issue: 99
• DOI: https://doi.org/10.1109/TEC.2016.2605076
• Keywords: Four-Leg Converters, Three level Neutral Point Clamped (NPC) inverter, Three Dimensional Space Vector Modulation (3D-SVM)
• Public URL: https://nottingham-repository.worktribe.com/output/803259
• Publisher URL: http://ieeexplore.ieee.org/document/7558237/
• Additional Information: c2016 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.