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Grid-connected medium-voltage converters with parallel voltage-source active filters

Bernet, Daniel; Hiller, Marc

Abstract:
Grid-connected medium voltage converters are typically operated at switching frequencies of several hundred hertz per switch position, requiring bulky and expensive LCL-filters in order to meet the harmonic limits given by the grid code. Commonly, semiconductor current derating and increased switching frequencies are used to reduce the LCL-filter costs, leading to a reduced utilization and efficiency of the converter system. To overcome these disadvantages of conventional converter systems, the presented hybrid converter uses a parallel voltage-source active output filter and thus allows a significant reduction of the passive component demand. The harmonic performance is improved for the operation with small passive filter components, revealing the potential for increasing the utilization and efficiency of high power medium voltage converters. As a result, significant reductions of the filter losses and passive components as well as an increased output power are achieved compared to a reference LCL-filter based converter system.

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Postprint §
DOI: 10.5445/IR/1000095918
Veröffentlicht am 24.06.2019
Originalveröffentlichung
DOI: 10.1049/iet-epa.2019.0021
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Elektrotechnisches Institut (ETI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2019
Sprache Englisch
Identifikator ISSN: 1751-8660, 1751-8679
KITopen-ID: 1000095918
HGF-Programm 37.06.01 (POF III, LK 01)
Networks and Storage Integration
Erschienen in IET electric power applications
Band 13
Heft 10
Seiten 1507–1513
Vorab online veröffentlicht am 15.05.2019
Externe Relationen Abstract/Volltext
Nachgewiesen in Scopus
Web of Science
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