Statistical evaluation of the identified structural parameters of an idling offshore wind turbine

H.C. Kramers, Paul van der Valk, Jan-Willem van Wingerden

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

With the increased need for renewable energy, new offshore wind farms are being developed at an unprecedented scale. However, as the costs of offshore wind energy are still too high, design optimization and new innovations are required for lowering its cost. The design of modern day offshore wind turbines relies on numerical models for estimating ultimate and fatigue loads of the turbines. The dynamic behavior and the resulting structural loading of the turbines is determined for a large part by its structural properties, such as the natural frequencies and damping ratios. Hence, it is important to obtain accurate estimates of these modal properties. For this purpose stochastic subspace identification (SSI), in combination with clustering and statistical evaluation methods, is used to obtain the variance of the identified modal properties of an installed 3.6MW offshore wind turbine in idling conditions. It is found that one is able to obtain confidence intervals for the means of eigenfrequencies and damping ratios of the fore-aft and side-side modes of the wind turbine.
Original languageEnglish
Title of host publication Journal of Physics: Conference Series
Subtitle of host publicationTORQUE 2016: The Science of Making Torque from Wind
EditorsE. Bossanyi, T. Chaviaropoulos, P.W. Cheng
Place of PublicationBristol, UK
PublisherIOP Publishing
Number of pages10
Volume753
EditionD. Control and supporting technologies
DOIs
Publication statusPublished - 2016
EventTORQUE 2016: 6th International Conference "The Science of Making Torque from Wind" - Technische Universität München (TUM), Campus Garching, Munich, Germany
Duration: 5 Oct 20167 Oct 2016
https://www.events.tum.de/?sub=29

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Publishing
Volume753

Conference

ConferenceTORQUE 2016: 6th International Conference "The Science of Making Torque from Wind"
CountryGermany
CityMunich
Period5/10/167/10/16
Internet address

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