Wake detection in the turbine inflow using nacelle lidars

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

*Corresponding author for this work

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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
CountryGermany
CityHamburg
Period25/09/201828/09/2018
Internet address

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