Space vector modulated cascade multi-level inverter for PMSG wind generation systems

Vilathgamuwa, D.M., Jayasinghe, S.D.G., & Madawala, U.K. (2009) Space vector modulated cascade multi-level inverter for PMSG wind generation systems. In Proceedings of the 35th Annual Conference of IEEE Industrial Electronics (IECON 2009), IEEE, Porto, Portugal, pp. 4600-4605.

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Abstract

Modulation and control of a cascade multilevel inverter, which has a high potential in future wind generation applications, are presented. The inverter is a combination of a high power, three level “bulk inverter” and a low power “conditioning inverter”. To minimize switching losses, the bulk inverter operates at a low frequency producing square wave outputs while high frequency conditioning inverter is used to suppress harmonic content produced by the bulk inverter output. This paper proposes an improved Space Vector Modulation (SVM) algorithm and a neutral point potential balancing technique for the inverter. Furthermore, a maximum power tracking controller for the Permanent Magnet Synchronous Generator (PMSG) is described in detail. The proposed SVM technique eliminates most of the computational burdens on the digital controller and renders a greater controllability under varying DC-link voltage conditions. The DC-link capacitor voltage balancing of both bulk and conditioning inverters is carried out using Redundant State Selection (RSS) method and is explained in detail. Experimental results are presented to verify the proposed modulation and control techniques.

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ID Code: 75629
Item Type: Conference Paper
Refereed: Yes
Keywords: Multi-level converter, PMSG, Neutral point potential balancing, Space Vector Modulation, Redundant State Selection
DOI: 10.1109/IECON.2009.5414862
ISBN: 9781424446483
ISSN: 1553-572X
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2009 by IEEE
Deposited On: 28 Aug 2014 03:57
Last Modified: 29 Aug 2014 00:56

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