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High-Power Modular Multilevel Converters With SiC JFETs

This paper studies the possibility of building a modular multilevel converter (M2C) using silicon carbide (SiC) switches. The main focus is on a theoretical investigation of the conduction losses of such a converter and a comparison to a corresponding converter with silicon-insulated gate bipolar transistors. Both SiC BJTs and JFETs are considered and compared in order to choose the most suitable technology. One of the submodules of a down-scaled 3 kVA prototype M2C is replaced with a submodule with SiC JFETs without antiparallel diodes. It is shown that the diode-less operation is possible with the JFETs conducting in the negative direction, leaving the possibility to use the body diode during the switching transients. Experimental waveforms for the SiC submodule verify the feasibility during normal steady-state operation. The loss estimation shows that a 300 MW M2C for high-voltage direct current transmission would potentially have an efficiency of approximately 99.8% if equipped with future 3.3 kV 1.2 kA SiC JFETs. / © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.QC 20111220

Identiferoai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kth-52687
Date January 2012
CreatorsPeftitsis, Dimosthenis, Tolstoy, Georg, Antonopoulos, Antonios, Rabkowski, Jacek, Lim, Jang-Kwon, Bakowski, Mietek, Ängquist, Lennart, Nee, Hans-Peter
PublisherKTH, Elektrisk energiomvandling, KTH, Elektrisk energiomvandling, KTH, Elektrisk energiomvandling, KTH, Elektrisk energiomvandling, KTH, Elektrisk energiomvandling, KTH, Elektrisk energiomvandling, KTH, Elektrisk energiomvandling, Acreo AB
Source SetsDiVA Archive at Upsalla University
LanguageEnglish
Detected LanguageEnglish
TypeArticle in journal, info:eu-repo/semantics/article, text
Formatapplication/pdf
Rightsinfo:eu-repo/semantics/openAccess
RelationIEEE transactions on power electronics, 0885-8993, 2012, 27:1, s. 28-36

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