Analysis of DC/DC Converter Efficiency for Energy Storage System Based on Bidirectional Fuel Cells

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

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    Abstract

    Renewable energy sources are fluctuating depending on the availability of the energy source. For this reason, energy storage is becoming more important and bidirectional fuel cells represent an attractive technology. Fuel cells require highcurrent low-voltage dc-dc or dc-ac converters as power interface to the grid. In power electronics, the converter efficiency is characterized at fixed operating voltage for various output power. This type of characterization is not suitable for fuel cells, since as the power from the fuel cell increases, the cell voltage decreases. This paper analyses how the fuel cell I-V characteristics influences the power electronics converter efficiency and their consequence on the overall system. A loaddependent efficiency curve is presented based on experimental results from a 6 kW dc-dc converter prototype including the most suitable control strategy which maximizes the dc-dc conversion efficiency.
    Original languageEnglish
    Title of host publicationProceedings of the 2013 4th IEEE PES Innovative Smart Grid Technologies Europe
    Number of pages5
    PublisherIEEE
    Publication date2013
    ISBN (Print)978-1-4799-2984-9
    Publication statusPublished - 2013
    Event2013 4th IEEE PES Innovative Smart Grid Technologies Europe - Technical University of Denmark (DTU), Lyngby, Denmark
    Duration: 6 Oct 20139 Oct 2013
    Conference number: 4
    http://www.ieee-isgt-2013.eu/

    Conference

    Conference2013 4th IEEE PES Innovative Smart Grid Technologies Europe
    Number4
    LocationTechnical University of Denmark (DTU)
    Country/TerritoryDenmark
    CityLyngby
    Period06/10/201309/10/2013
    Internet address

    Keywords

    • Fuel cells
    • Energy storage
    • Smart grids
    • Dc-dc power converters
    • Energy efficiency

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