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

Rojas, Felix and Cardenas, Roberto and Kennel, Ralph and Clare, Jon C. and Diaz, Matias (2016) A simplified space-vector modulation algorithm for four-leg NPC converters. IEEE Transactions on Power Electronics, 32 (11). pp. 8371-8380. ISSN 1941-0107

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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.

Item Type: Article
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.
Keywords: NPC converters, four-leg converters, Space vec¬tor Modulation (SVM), Distributed Power Generation Systems (DPGS), Unbalanced Distribution Systems
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: 10.1109/TPEL.2016.2618061
Depositing User: Burns, Rebecca
Date Deposited: 12 Oct 2017 12:57
Last Modified: 16 Oct 2017 07:03
URI: http://eprints.nottingham.ac.uk/id/eprint/47231

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