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Experimental Study of the Transient Behavior of a Wind Turbine Wake Following Yaw Actuation

Author

Listed:
  • Derek Micheletto

    (Department of Engineering Mechanics, KTH Royal Institute of Technology, 11428 Stockholm, Sweden)

  • Jens H. M. Fransson

    (Department of Engineering Mechanics, KTH Royal Institute of Technology, 11428 Stockholm, Sweden)

  • Antonio Segalini

    (Department of Earth Sciences, Uppsala University, 75236 Uppsala, Sweden)

Abstract

Wind tunnel experiments were performed to investigate the response of a wind turbine model immersed in a replicated atmospheric boundary layer to dynamic changes in the yaw angle. Both the flow field in the wake and the operating properties of the turbine, namely its thrust force, torque, and angular velocity, were monitored during repeated yaw maneuvers for a variety of yaw angles. It was observed that the characteristic time scale of the transient experienced by the turbine scalar quantities was one order of magnitude larger than that of the yaw actuation and depended primarily on the inertia of the rotor and the generator. Furthermore, a Morlet wavelet analysis of the thrust signal showed a strong peak at the rotation frequency of the turbine, with the transient emergence of high activity at a lower frequency during the yaw maneuver. The insights provided by the proper orthogonal decomposition analysis performed on the wake velocity data enabled the development of a simple reduced-order model for the transient in the flow field based on the stationary states before and after the yaw maneuver. This model was then further improved to require only the final state, extending its applicability to any arbitrary wind farm as a dynamical surrogate of the farm behavior.

Suggested Citation

  • Derek Micheletto & Jens H. M. Fransson & Antonio Segalini, 2023. "Experimental Study of the Transient Behavior of a Wind Turbine Wake Following Yaw Actuation," Energies, MDPI, vol. 16(13), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5147-:d:1186239
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    References listed on IDEAS

    as
    1. Francesco Mazzeo & Derek Micheletto & Alessandro Talamelli & Antonio Segalini, 2022. "An Experimental Study on a Wind Turbine Rotor Affected by Pitch Imbalance," Energies, MDPI, vol. 15(22), pages 1-16, November.
    2. Ebrahimi, Abbas & Sekandari, Mahmood, 2018. "Transient response of the flexible blade of horizontal-axis wind turbines in wind gusts and rapid yaw changes," Energy, Elsevier, vol. 145(C), pages 261-275.
    3. Abraham, Aliza & Hong, Jiarong, 2020. "Dynamic wake modulation induced by utility-scale wind turbine operation," Applied Energy, Elsevier, vol. 257(C).
    4. Zhang, Buen & Jin, Yaqing & Cheng, Shyuan & Zheng, Yuan & Chamorro, Leonardo P., 2022. "On the dynamics of a model wind turbine under passive tower oscillations," Applied Energy, Elsevier, vol. 311(C).
    5. Wim Munters & Johan Meyers, 2018. "Dynamic Strategies for Yaw and Induction Control of Wind Farms Based on Large-Eddy Simulation and Optimization," Energies, MDPI, vol. 11(1), pages 1-32, January.
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