Active tip deflection control for wind turbines

RENEWABLE ENERGY

卷:149

Article

Liew, Jaime¹  Lio, Wai Hou¹  Urban, Albert Meseguer¹  Holierhoek, Jessica²  Kim, Taeseong^1,3 

[1] Tech Univ Denmark DTU, Dept Wind Energy, Frederiksborgvej 399, DK-4000 Roskilde, Denmark

[2] Delft Univ Technol, Dept Wind Energy, Delft, Netherlands

[3] Loughborough Univ, CREST, Wolfson Sch Mech Elect & Mfg Engn, Loughborough LE11 3TU, Leics, England

关键词: Wind energy;    Tip deflection sensors;    Individual pitch control;    Tower clearance;    Fatigue load reduction;   

DOI  :  10.1016/j.renene.2019.12.036

来源: Elsevier

【 摘 要 】

This paper studies the use of blade tip sensors for load reductions and blade-tower clearance control. Typically, modern blade tip sensors measure flapwise tip deflection distances at a high sampling rate, and such measurements can be utilised as feedback signals for control operations. Thus, this paper proposes a novel blade pitch control design based on the tip deflection measurements and individual pitch control (IPC). Firstly, an IPC system design is presented, using the tip deflection measurements to alleviate turbine fatigue loads caused by differential loads such as wind shear, yaw misalignment and turbulence. Secondly, a novel implementation of IPC with tip trajectory tracking feature is proposed 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 and flexible rotors. The presented controller is implemented in HAWC2, and high fidelity load measurements are produced using the DTU10MW reference wind turbine. The simulation results showed that the fatigue damage reduction on key turbine components and the improved blade-tower clearance can be achieved simultaneously. Lifetime equivalent load reductions were seen in both rotating and fixed frame components under the normal operating conditions. (C) 2019 Published by Elsevier Ltd.

【 授权许可】

Free