The effect of wake position and yaw misalignment on power loss in wind turbines

Albert M. Urbán*, Jaime Yikon Liew, Ebba Dellwik, Gunner Chr. Larsen

*Corresponding author for this work

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

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Abstract

For a single wind turbine, the efficiency of extracting energy from the wind depends on the ability to align the wind turbine with the dominating wind direction. Considering average power production, yaw misalignment is relevant when the wind turbine operates with maximum power coefficient. On the other hand, the power production is less sensitive to yaw misalignment in high wind speeds, where the available energy in the wind field is higher than the maximum wind turbine capacity. In a wind farm, the interaction between nearby wind turbines alters the flow, and the power production is reduced. The present study investigates how yaw misalignment affects the power production in these wake situations compared to yaw misalignment effects for a wind turbine in the free-stream. Two generic cases are presented in this paper, offshore and forest, where the atmospheric conditions alter the morphology of the wake and, therefore, the power output of a yawed wind turbine operating in wake conditions. The results show that, for a conventional downstream spacing further than 3 rotor diameters, yaw misalignment results in larger power loss in wake situations than in free-stream. In wake situations, the presented results also show that the spatial distribution of the deficit influences the relative power loss when the wind turbine is operating in yawed conditions.
Original languageEnglish
Title of host publicationProceedings of the WindEurope Conference and Exhibition 2019
Number of pages8
Publication date2019
Article number012002
DOIs
Publication statusPublished - 2019
EventWindEurope Conference and Exhibition 2019: Delivering a Clean Economy for all Europeans - BEC – Bilbao Exhibition Centre , Bilbao, Spain
Duration: 2 Apr 20194 Apr 2019
https://windeurope.org/confex2019/
https://windeurope.org/confex2019/information/venue/

Conference

ConferenceWindEurope Conference and Exhibition 2019
LocationBEC – Bilbao Exhibition Centre
CountrySpain
CityBilbao
Period02/04/201904/04/2019
Internet address
SeriesJournal of Physics: Conference Series (Online)
NumberConf. 1
Volume1222
ISSN1742-6596

Bibliographical note

Content from this work may be used under the terms of theCreative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Published under licence by IOP Publishing Ltd

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