29 Jun 2023
 | 29 Jun 2023
Status: a revised version of this preprint was accepted for the journal WES.

Wind Vane Correction during Yaw Misalignment for Horizontal Axis Wind Turbines

Andreas Rott, Leo Höning, Paul Hulsmann, Laura J. Lukassen, Christof Moldenhauer, and Martin Kühn

Abstract. This paper investigates the accuracy of wind direction measurements for horizontal axis wind turbines and its impact on yaw control. The yaw controller is crucial for aligning the rotor with the wind direction and optimizing energy extraction. Wind direction is conventionally measured by one or two wind vanes located on the nacelle, but the proximity of the rotor can interfere with these measurements. The authors show that the conventional corrections, including low-pass filters and calibrated offset correction, are not adequate to account for a systematic overestimation of the wind direction deviation caused by the rotor misalignment. This measurement error can lead to an overcorrection of the yaw controller, and thus, to an oscillating yaw behaviour, even if the wind direction is relatively steady. The authors present a theoretical basis and methods for quantifying the wind vane measurement error and validate their findings using computational fluid dynamics simulations and operational data from two commercial wind turbines. Additionally, the authors propose a correction function that improves the wind vane measurements and demonstrate its effectiveness in two free field experiments. Overall, the paper provides new insights into the accuracy of wind direction measurements and proposes solutions to improve the yaw control for horizontal axis wind turbines.

Andreas Rott et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on wes-2023-53', Johannes Schreiber, 04 Jul 2023
  • RC1: 'Comment on wes-2023-53', Anonymous Referee #1, 05 Jul 2023
  • RC2: 'Comment on wes-2023-53', Anonymous Referee #2, 10 Jul 2023
  • AC1: 'Comment on wes-2023-53', Andreas Rott, 25 Aug 2023

Andreas Rott et al.

Andreas Rott et al.


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Short summary
This study examines wind vane measurements of commercial wind turbines and their impact on yaw control. The authors found that rotor interference can cause an overestimation of wind vane measurements, leading to overcorrection of the yaw controller. A correction function that improves the yaw behavior is presented and validated in free field experiments on a commercial wind turbine. This work provides new insights into wind direction measurements and suggests ways to optimize yaw control.