Analysis and design of a series resonant converter with wide operating range and minimized transformer ratings

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Abstract

This paper is introducing a new method of operation for a series resonant converter, with intended application in megawatt high voltage DC wind turbines. Compared to a frequency-controlled series resonant converter operated in sub-resonant mode, the new method (entitled pulse removal technique) allows the transformer design to be determined by peak load and maximum switching frequency, while still avoiding over-excitation at reduced load and reduced excitation frequency. This promises transformer size reduction of more than 50%, while losses are kept below 1% from zero to nominal power. A step by step design procedure is proposed and circuit component ratings and efficiency are compared for two variants.
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This paper is introducing a new method of operation for a series resonant converter, with intended application in megawatt high voltage DC wind turbines. Compared to a frequency-controlled series resonant converter operated in sub-resonant mode, the new method (entitled pulse removal technique) allows the transformer design to be determined by peak load and maximum switching frequency, while still avoiding over-excitation at reduced load and reduced excitation frequency. This promises transformer size reduction of more than 50%, while losses are kept below 1% from zero to nominal power. A step by step design procedure is proposed and circuit component ratings and efficiency are compared for two variants.
Original languageEnglish
Title of host publicationProceedings of the 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)
Number of pages10
PublisherIEEE Press
Publication dateSep 2017
ISBN (Electronic)978-90-75815-27-6
DOI
StatePublished - Sep 2017
Publication categoryResearch
Peer-reviewedYes
Event2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) - Warsaw, Poland
Duration: 11 Sep 201714 Sep 2017

Conference

Conference2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)
LandPoland
ByWarsaw
Periode11/09/201714/09/2017

    Research areas

  • High voltage power converters, Resonant converter, DC collector network, Wind energy

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