Analysis and Comparison of Si and SiC Power Devices on a Grid-Tie Fuel Cell Energy Storage System

Riccardo Pittini, Alexander Anthon, Zhe Zhang, Michael A. E. Andersen

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Abstract

In renewable energy applications power conversion efficiency is major concern. This is especially true for grid-tie energy storage systems based on bidirectional dc-dc and dc-ac converters where power flows through these system components. Latest developments in power semiconductors technology signif- icantly reduced switching and conduction losses in dc-dc and dc-ac converters allowing efficiencies above 98%. This paper analyzes the efficiency improvement that is achieved by the introduction of SiC power semiconductors in dc-dc and dc-ac converters. The analysis is focuses on fuel cell grid-tie energy storage systems. Results highlight dc-dc conversion efficiencies up to 98.2% with an isolated topology and dc-ac conversion efficiencies up to 97.7%. Overall system efficiency improvements above 1% are achieved compared to traditional Si devices. Results on efficiency improvement are analyzed based on two laboratory converter prototypes of an isolated full bridge boost converter (IFBBC) and a three level T-type inverter (BSNPC)
Original languageEnglish
Title of host publicationProceedings of IEEE International Power Electronics and Application Conference and Exposition
PublisherIEEE
Publication date2014
Pages296-301
ISBN (Print)978-1-4799-6768-1
DOIs
Publication statusPublished - 2014
EventIEEE International Power Electronics and Application Conference and Exposition - Holiday Inn Shanghai Pudong Kangqiao, Shanghai, China
Duration: 5 Nov 20148 Nov 2014

Conference

ConferenceIEEE International Power Electronics and Application Conference and Exposition
LocationHoliday Inn Shanghai Pudong Kangqiao
CountryChina
CityShanghai
Period05/11/201408/11/2014

Keywords

  • Silicon carbide (SiC)
  • Energy storage
  • Power Semiconductors
  • dc-dc converter
  • dc-ac converter

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