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Grid-Connected Voltage Source Converters with integrated Multilevel-Based Active Filters

Bernet, Daniel; Stefanski, Lukas; Schwendemann, Rudiger; Rollbühler, Christoph; Hiller, Marc

Abstract:
Low- and medium voltage power converters for grid applications require bulky and expensive LCL-filters in order to meet the harmonic limits defined by the grid code. This paper presents a novel hybrid converter topology with smaller passive components, composed of a high power main converter with an integrated low power active filter. The presented coupled control strategies for a current-source and a voltage-source topology enable the immediate mitigation of the switching frequency current ripple, significantly decreasing the total harmonic distortion (THD) of the output current to below 5 % and thereby eliminating the need for a passive LCL-filter. Compared to LCL-filter based converter systems, a reduction of the inductive component expenditure of up to 50 % is achievable even for a very low active filter to main converter power rating ratio of 10 %. The outstanding harmonic performance and reduced passive component demand of the hybrid converter allow increased power density and efficiency as well as lower costs of low- and medium voltage power converters.

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Postprint §
DOI: 10.5445/IR/1000089950
Veröffentlicht am 23.01.2019
Originalveröffentlichung
DOI: 10.1109/ECCE.2018.8557648
Zugehörige Institution(en) am KIT Elektrotechnisches Institut (ETI)
Publikationstyp Proceedingsbeitrag
Jahr 2018
Sprache Englisch
Identifikator ISBN: 978-1-4799-7313-2
urn:nbn:de:swb:90-899501
KITopen-ID: 1000089950
Erschienen in 2018 IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR, USA, 23-27 Sept. 2018
Verlag IEEE, Piscataway (NJ)
Seiten 127–134
Externe Relationen Abstract/Volltext
Schlagworte active filter, converter systems, multilevel converter, control systems, LCL filter, active front end
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