2020/07/31 by Michael F. Howland, Howland, Michael F., Carlos Moral González +13
Engineering · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Wind Energy Research and Development #Wind Turbine Control Systems
paper · pdf · doi:10.48550/arxiv.2008.00873
openalex publication_date 2020/07/31 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
The intentional yaw misalignment of leading, upwind turbines in a wind farm,\ntermed wake steering, has demonstrated potential as a collective control\napproach for wind farm power maximization. The optimal control strategy, and\nresulting effect of wake steering on wind farm power production, are in part\ndictated by the power degradation of the upwind yaw misaligned wind turbines.\nIn the atmospheric boundary layer, the wind speed and direction may vary\nsignificantly over the wind turbine rotor area, depending on atmospheric\nconditions and stability, resulting in freestream turbine power production\nwhich is asymmetric as a function of the direction of yaw misalignment and\nwhich varies during the diurnal cycle. In this study, we propose a model for\nthe power production of a wind turbine in yaw misalignment based on aerodynamic\nblade elements which incorporates the effects of wind speed and direction\nchanges over the turbine rotor area in yaw misalignment. A field experiment is\nperformed using multiple utility-scale wind turbines to characterize the power\nproduction of yawed freestream operating turbines depending on the wind\nconditions, and the model is validated using the experimental data. The\nresulting power production of a yaw misaligned variable speed wind turbine\ndepends on a nonlinear interaction between the yaw misalignment, the\natmospheric conditions, and the wind turbine control system.\n