Active tip deflection control for wind turbines
| Autor: | Wai Hou Lio, J.G. Holierhoek, Albert Meseguer Urban, Taeseong Kim, Jaime Liew |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Wind power
060102 archaeology Discretization Renewable Energy Sustainability and the Environment business.industry Computer science Turbulence 020209 energy Tip deflection sensors 06 humanities and the arts 02 engineering and technology Turbine High fidelity Control theory Deflection (engineering) Wind shear Individual pitch control 0202 electrical engineering electronic engineering information engineering Design process 0601 history and archaeology business Wind energy Fatigue load reduction Tower clearance |
| Zdroj: | Liew, J, Lio, W H, Meseguer Urbán, A, Holierhoek, J & Kim, T 2020, ' Active tip deflection control for wind turbines ', Renewable Energy, vol. 149, pp. 445-454 . https://doi.org/10.1016/j.renene.2019.12.036 |
| Popis: | This thesis presents an individual tip control (IPC) system based on blade tip deflection measurements. The controller is based on novel sensor inputs which measure flapwise tip deflection distance at a high sampling rate. IPC plays a key role in reducing fatigue loads in wind turbine components. These fatigue loads are caused by differential loads such as wind shear, yaw misalignment and turbulence. The presented controller is implemented in HAWC2 and high fidelity load measurements are produced using the DTU10MW Reference Wind Turbine. Lifetime equivalent load reductions were seen in both rotating and fixed frame components under extreme turbulence, inverse shear conditions and in normal operating conditions. A novel implementation of IPC is also presented where the blade tips are guided along a fixed trajectory to maximise blade-tower clearance. The motivation of this implementation is to reduce the chance of blade-tower interactions for large diameter turbine rotors. The theoretical background used in this study is presented first along with details of controller discretisation methods. Details of the iterative control design process is presented, and the simulated fatigue loads are compared for a number of control architectures. Finally, the implementation of the tip trajectory tracking control is presented along with an analysis of the pitch rate limits and the effect of IPC on electrical power output. |
| Databáze: | OpenAIRE |
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