Wake detection in the turbine inflow using nacelle lidars

Dominique P. Held*, Nikolaos Kouris, Antoine Larvol, Jakob Mann

*Corresponding author for this work

    Research output: Contribution to journalConference articleResearchpeer-review

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    Abstract

    In this study we present the ability to detect wakes in the inflow of turbines using nacelle-mounted continuous-wave lidar systems. Wake flows generate small-scale turbulence, which has significantly smaller length-scales than ambient turbulence. Due to the lidars large probe volume this turbulence is attenuated and will not be visible in the lidar’s measurements. One approach to retrieve information about small-scale turbulence is by measuring the lidar Doppler spectrum width. Here we present an wake detection algorithm based on these measurements at two distinct locations in front of the turbine. By comparing the line-of-sight turbulence intensity and considering the instantaneous misalignment it is possible to detect half-and full-wakes. This has been tested during a 4.5 month long experiment and results show that situations where the wake affects the lidar measurements can be removed.
    Original languageEnglish
    Article number012005
    Book seriesJournal of Physics: Conference Series
    Volume1102
    Issue number1
    Number of pages7
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2018
    EventWindEurope 2018 Conference at the Global Wind Summit - Hamburg, Hamburg, Germany
    Duration: 25 Sep 201828 Sep 2018
    https://windeurope.org/summit2018/

    Conference

    ConferenceWindEurope 2018 Conference at the Global Wind Summit
    LocationHamburg
    Country/TerritoryGermany
    CityHamburg
    Period25/09/201828/09/2018
    Internet address

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