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Validated extrapolation of measured damage within an offshore wind farm using instrumented fleet leaders
Authors
Christof Devriendt
Clemens Hübler
Nymfa Noppe
Wout Weijtjens
Publication date
1 January 2020
Publisher
Bristol : IOP Publishing Ltd.
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Abstract
As the older wind farms are slowly reaching their design lifetime, topics like fatigue and lifetime assessment gain importance. To decide on a possible lifetime extension of the turbine and its foundation, an accurate fatigue assessment for every wind turbine in the farm is needed. As the installation of specific sensors needed for a fatigue assessment is too time consuming and costly, the "Fleet Leader Concept" is applied and validated in this paper. Here, a few turbines are instrumented and a fatigue assessment based on rainflow counting and Miner's rule can be performed. For a farm-wide fatigue assessment, the obtained damage is extrapolated towards the other turbines. Sample based bootstrapping is performed to introduce an uncertainty on the results. A successful extrapolation was obtained for in-field measurements at an older offshore wind farm. In general, relative errors of less than 5% on damage were found. © 2020 Published under licence by IOP Publishing Ltd
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 11/04/2021