Individual blade pitch for yaw control

The Science of Making Torque from Wind 2014

Navalkar, S.T.^1 ; Van Wingerden, J.W.^1 ; Van Kuik, G.A.M.^2

Delft Centre for Systems and Control, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, 2628CD Delft, Netherlands^1

Wind Energy Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629HS Delft, Netherlands^2

关键词: Concept demonstration;    High-fidelity;    Individual blade pitches;    Individual pitch control;    Stationary frame;    Support structures;    Tuning parameter;    Turbine designs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012057/pdf
DOI  :  10.1088/1742-6596/524/1/012057

来源: IOP

【 摘 要 】

Individual pitch control (IPC) for reducing blade loads has been investigated and proven successful in recent literature. For IPC, the multi-blade co-ordinate (MBC) transformation is used to process the blade load signals from the rotating to a stationary frame of reference. In the stationary frame of reference, the yaw error of a turbine can be appended to generate IPC actions that are able to achieve turbine yaw control for a turbine in free yaw. In this paper, IPC for yaw control is tested on a high-fidelity numerical model of a commercially produced wind turbine in free yaw. The tests show that yaw control using IPC has the distinct advantage that the yaw system loads and support structure loading are substantially reduced. However, IPC for yaw control also shows a reduction in IPC blade load reduction potential and causes a slight increase in pitch activity. Thus, the key contribution of this paper is the concept demonstration of IPC for yaw control. Further, using IPC for yaw as a tuning parameter, it is shown how the best trade-off between blade loading, pitch activity and support structure loading can be achieved for wind turbine design.