Loss of Synchronism of Wind Turbine Converters during Low Voltage Grid Faults

Ömer Göksu, Poul Ejnar Sørensen, Florin Iov, Claus Leth Bak, Philip Carne Kjær

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

    Abstract

    In the recent grid codes, wind power plants are
    required to stay connected and inject reactive and active
    currents during grid short-circuit faults, even when the grid
    voltage drops down to zero. However, the physical fact, Loss
    of Synchronism (LOS) of wind turbines during these very low
    voltage faults has been underestimated in the grid codes; and
    the LOS has recently been explored only in few studies. In this
    paper the LOS phenomenon is studied, especially focusing on
    the case of a string of wind turbines, rather than an
    aggregated one. It is shown that the LOS affects the wind
    power plant as whole. Additionally, existing methods to solve
    the LOS problem are briefly reviewed, and a closed loop
    frequency based solution is implemented within PowerFactory
    simulations of a detailed generic wind power plant model.
    Original languageEnglish
    Title of host publicationProceedings of the 13th Wind Integration Workshop
    Number of pages6
    Publication date2014
    Publication statusPublished - 2014
    Event13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Power - Berlin, Germany
    Duration: 11 Nov 201413 Nov 2014
    Conference number: 13

    Conference

    Conference13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Power
    Number13
    Country/TerritoryGermany
    CityBerlin
    Period11/11/201413/11/2014

    Keywords

    • Short-circuit faults
    • Converters
    • Current control
    • Power system stability
    • Wind Power Generation
    • Phase locked loops
    • IEC standards

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