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ECN publication
Title:
Comparison of extreme load extrapolations using measured and calculated loads of a MW wind turbine
 
Author(s):
Peeringa, J.M.
 
Published by: Publication date:
ECN Wind Energy 20-4-2009
 
ECN report number: Document type:
ECN-M--09-055 Conference Paper
 
Number of pages: Full text:
12 Download PDF  

Presented at: European Wind Energy Conference 2009, Marseille, France, 16-19 maart 2009.

Abstract:
Since edition 3 of the standard IEC 61400-1 "Wind Turbines-Part 1; Design requirements" has been issued extreme load extrapolation during normal production is an important part of the wind turbine design and certification. At the ECN test site ’ECN Windturbine Testpark Wieringermeer’ (EWTW) five in line 2.5 MW turbines are used for research purposes. A data base with about 4 years of high quality load and meteorological measurements for a 2.5 MW wind turbine in free stream and wake conditions is available for research. This gives ECN the unique opportunity to compare extreme loads using extreme value statistics based on load simulations and load measurements for both free stream and wake conditions. Extreme load extrapolation will be applied on the flat blade root bending moment and the for aft tower bottom bending moment. Attention will be paid to the selection of the extreme value probability distribution and the amount of data needed.


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