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Non-Linear Aeroelastic Stability of Wind Turbines

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Authors:
  • Zhang, Zili ;
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    The Faculty of Engineering and Science (ENG), Aalborg University
  • Sichani, Mahdi Teimouri ;
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    Structural Dynamics, Reliability and Risk Analysis, Department of Civil Engineering, The Faculty of Engineering and Science, Aalborg University
  • Li, Jie ;
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    Tongji University
  • Chen, Jianbing ;
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    Tongji University
  • Nielsen, Søren R.K.
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    Orcid logo0000-0002-8540-6792
    Department of Civil Engineering, The Faculty of Engineering and Science, Aalborg University
Editor:
Basu, Biswajit
DOI:
10.4028/www.scientific.net/KEM.569-570.531
Abstract:
As wind turbines increase in magnitude without a proportional increase in stiffness, the risk of dynamic instability is believed to increase. Wind turbines are time dependent systems due to the coupling between degrees of freedom defined in the fixed and moving frames of reference, which may trigger off internal resonances. Further, the rotational speed of the rotor is not constant due to the stochastic turbulence, which may also influence the stability. In this paper, a robust measure of the dynamic stability of wind turbines is suggested, which takes the collective blade pitch control and non-linear aero-elasticity into consideration. The stability of the wind turbine is determined by the maximum Lyapunov exponent of the system, which is operated directly on the non-linear state vector differential equations. Numerical examples show that this approach is promising for stability identification of the non-linear wind turbine system.
ISBN:
9783037955222, 9783037857960
Type:
Conference paper
Language:
English
Published in:
Key Engineering Materials: 10th International Conference on Damage Assessment of Structures (damas 2013), July 8-10, 2013, Dublin, Ireland, 2013, p. 531-538
Keywords:
Wind Turbine; Non-Linear Systems; Aeroelastic Stability; Lyapunov Exponent
Main Research Area:
Science/technology
Publication Status:
Published
Series:
Key Engineering Materials
Review type:
Peer Review
Conference:
10th International Conference on Damage Assessment of Structures, 2013
Publisher:
Trans Tech Publications Ltd.
Submission year:
2013
Scientific Level:
Scientific
ID:
244649762

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