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 Plants - Berlin, Germany
Duration: 11 Nov 201413 Nov 2014

Conference

Conference13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants
CountryGermany
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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