SiC modular multilevel converters: Sub-module voltage ripple analysis and efficiency estimations

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Abstract

Two important technical challenges associated with the Modular Multilevel Converter (MMC) are the reduction of the voltage ripple of the Sub-Module (SM) capacitors and the reduction of the converter losses. This paper conducts a study focused on these two topics. Firstly, the effect of a circulating current with a predefined second harmonic on the SM voltage ripple is assessed. Secondly, an efficiency study for two different MMCs, one with silicon (Si) and the other with silicon carbide (SiC) devices is carried out. Results suggest that a SiC MMC converter with a circulating current including a second harmonic represent a good solution since it achieves a reduction of the SM capacitors together with a high efficiency operation.

Original languageEnglish
Title of host publicationProceedings - PCIM Europe 2014
Subtitle of host publicationInternational Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
PublisherMesago PCIM GmbH
Pages1418-1425
Number of pages8
ISBN (Print)9783800736034
Publication statusPublished - 2014
EventInternational Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2014 - Nuremberg, Germany
Duration: 20 May 201422 May 2014

Publication series

NamePCIM Europe Conference Proceedings
ISSN (Electronic)2191-3358

Conference

ConferenceInternational Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2014
Country/TerritoryGermany
CityNuremberg
Period20/05/1422/05/14

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