Abstract
Abstract. In this paper, a field test of wake-steering control is presented. The field test is the result of a collaboration between the National Renewable Energy Laboratory (NREL) and Envision Energy, a smart energy management company and turbine manufacturer. In the campaign, an array of turbines within an operating commercial offshore wind farm in China have the normal yaw controller modified to implement wake steering according to a yaw control strategy. The strategy was designed using NREL wind farm models, including a computational fluid dynamics model, Simulator fOr Wind Farm Applications (SOWFA), for understanding wake dynamics and an engineering model, FLOw Redirection and Induction in Steady State (FLORIS), for yaw control optimization. Results indicate that, within the certainty afforded by the data, the wake-steering controller was successful in increasing power capture, by amounts similar to those predicted from the models.
Highlights
Wind farm control is an active field of research in which the controls of individual turbines co-located within a wind farm are coordinated to improve the overall performance of the farm
The pP term, which describes the loss of power against yaw misalignment, can be derived from the experimental data and compared with the value computed from Simulator fOr Wind Farm Applications (SOWFA) and used in FLOw Redirection and Induction in Steady State (FLORIS)
The most interpreted results come from the closer 7 D spacing, whereas the 8.5 D spacing has some changes that are partly caused by limited data availability
Summary
Wind farm control is an active field of research in which the controls of individual turbines co-located within a wind farm are coordinated to improve the overall performance of the farm. In one wind farm control concept, turbines are yawed to introduce a deflection of the wake away from downstream turbines. This method has been referred to as “controlling the wind” (Wagenaar et al, 2012) and “yaw-based wake steering” (Fleming et al, 2014b). In Fleming et al (2014b), they used National Renewable Energy Laboratory (NREL)’s CFD-based Simulator fOr Wind Farm Applications (SOWFA) to investigate the capabilities of wind turbines to redirect wakes. In Fleming et al (2014a), simulations of two-turbine wind farms, again using SOWFA, were used to show that through wake steering, the net power of the two turbines is increased when the upstream turbine applies an intentional yaw misalignment
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
