Frequency and Sequence Couplings in Type 4 and Type 3 Wind Turbines

Behnam Nouri*, Lukasz Kocewiak, Poul Sørensen

*Corresponding author for this work

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


    The multi-frequency (harmonic) interaction among converters is an increasing challenge in converter-dominated power grids. To study steady-state harmonics and transient harmonic stability, it is crucial to develop accurate multifrequency models for converters. However, the frequency and sequence couplings have not been addressed in the state-of-the-art analytical models as well as model validation tests for converters. This paper overviews the impedance measurement test methods for converters and demonstrates the couplings in frequencydomain based on time-domain simulations using typical Type 4 and Type 3 wind turbine models. The analysis shows significant frequency and sequence couplings which are neglected in the simplified analytical models.
    Original languageEnglish
    Title of host publicationProceedings of the 19th Wind Integration Workshop
    Number of pages6
    PublisherEnergynautics GmbH
    Publication date2020
    ISBN (Electronic)978-3-9820080-8-0
    Publication statusPublished - 2020
    Event19th Wind Integration Workshop - Online
    Duration: 11 Nov 202012 Nov 2020
    Conference number: 19


    Conference19th Wind Integration Workshop


    • Frequency coupling
    • Sequence coupling
    • Pertubation test
    • Wind turbine
    • Multi-frequency model


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