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Multi-cell DC-DC converter with high step-down voltage ratio
KTH, School of Electrical Engineering (EES), Electrical Energy Conversion.
2015 (English)In: 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015, Institute of Electrical and Electronics Engineers (IEEE), 2015, 2010-2016 p.Conference paper (Refereed)Text
Abstract [en]

The use of high voltage allows a power processing system to operate with low currents, improving efficiency. Nevertheless, final applications usually require low voltage inlet, which can be provided using modular multilevel converters submodules, for instance. However, every submodule's gate-unit requires energy from an isolated low power auxiliary supply. Generally, this is done by using an external converter since it is not practical to directly step-down the high voltage to required levels. In this context, this paper proposes a multi-cell solution based on stacking of buck-boost converters intended to be the first non-isolated stage of an isolated high step-down voltage ratio converter. Analysis and design are presented together with experimental verification of a 200 W rated power converter with 1.5 kV to 3.0 kV input voltage range and a nominal output voltage of 350 V.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2015. 2010-2016 p.
Keyword [en]
Auxiliary power supply, buck-boost converter, high step-down conversion ratio, HVDC, MMC, Electric current regulators, Electric inverters, Energy conversion, HVDC power transmission, Power converters, Buck boost converter, Experimental verification, Improving efficiency, Input voltage ranges, Modular multilevel converters, Step-down conversion, DC-DC converters
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-186849DOI: 10.1109/ECCE.2015.7309944ISI: 000378882902050ScopusID: 2-s2.0-84963546208ISBN: 9781467371506OAI: oai:DiVA.org:kth-186849DiVA: diva2:938068
Conference
7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015, 20 September 2015 through 24 September 2015
Note

QC 20160615

Available from: 2016-06-16 Created: 2016-05-13 Last updated: 2016-08-12Bibliographically approved

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Blinov, Andrei
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