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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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Preprints
https://doi.org/10.5194/wes-2020-70
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-70
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  19 May 2020

19 May 2020

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A revised version of this preprint was accepted for the journal WES and is expected to appear here in due course.

Wind tunnel testing of wake steering with dynamic wind direction changes

Filippo Campagnolo, Robin Weber, Johannes Schreiber, and Carlo L. Bottasso Filippo Campagnolo et al.
  • Wind Energy Institute, Technische Universität München, Garching bei München, D-85748 Germany

Abstract. The performance of an open-loop wake steering controller is investigated with a new unique set of wind tunnel experiments. A cluster of three scaled wind turbines, placed on a large turntable, is exposed to a turbulent inflow and dynamically changing wind directions, resulting in dynamically varying wake interactions. The changes in wind direction were sourced and scaled from a field-measured time history and mirrored on to the movement of the turntable.

Exploiting the known, repeatable and controllable conditions of the wind tunnel, this study investigates the following effects: fidelity of the model used for synthesizing the controller, assumption of steady state vs. dynamic plant behavior, wind direction uncertainty, the robustness of the formulation in regard to this uncertainty, and a finite yaw rate. The results were analyzed for power production of the cluster, fatigue loads and yaw actuator duty cycle.

The study highlights the importance of using a robust formulation and plant flow models of appropriate fidelity, and the existence of possible margins for improvement by the use of dynamic controllers.

Filippo Campagnolo et al.

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Filippo Campagnolo et al.

Filippo Campagnolo et al.

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Latest update: 25 Sep 2020
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Short summary
The performance of an open-loop wake steering controller is investigated with a new wind tunnel experiment. Three scaled wind turbines are placed on a large turntable and exposed to a turbulent inflow, resulting in dynamically varying wake interactions. The study highlights the importance of using a robust formulation and plant flow models of appropriate fidelity, and the existence of possible margins for improvement by the use of dynamic controllers.
The performance of an open-loop wake steering controller is investigated with a new wind tunnel...
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