Open AccessValidated extrapolation of measured damage within an offshore wind farm using instrumented fleet leaders
Author(s) -
Nymfa Noppe,
Clemens Hübler,
Christof Devriendt,
Wout Weijtjens
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1618/2/022005
Subject(s) - extrapolation , offshore wind power , turbine , marine engineering , bootstrapping (finance) , environmental science , reliability engineering , wind power , sample (material) , computer science , engineering , statistics , mathematics , econometrics , mechanical engineering , electrical engineering , chemistry , chromatography
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.