We present an application of L1 adaptive output feedback control design to wind turbine collective pitch control and load mitigation. Our main objective is the design of an L1 output feedback controller without wind speed estimation, ensuring that the generator speed tracks the reference trajectory with robustness to uncertain parameters and time-varying disturbances (mainly the uniform wind disturbance across the wind turbine rotor). The wind turbine model CART (controls advanced research turbine) developed by the national renewable energy laboratory (NREL) is used to validate the performance of the proposed L1 adaptive controller using the FAST (fatigue, aerodynamics, structures, and turbulence) code. A comparative study is also conducted between the proposed controller and the most popular methods in practice: gain scheduling PI (GSPI) controls and disturbance accommodating control (DAC) methods. The results show better performance of L1 output feedback controller over the other two methods. Moreover, based on the FAST software and LQR analysis in the reference model selection of L1 adaptive controller, tradeoff can be achieved between control performance and loads mitigation. © 2014 Danyong Li et al.


    Access

    Download


    Export, share and cite



    Title :

    Wind turbine pitch control and load mitigation using an l1 adaptive approach



    Publication date :

    2014-01-01



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629



    CFD Analysis on Load Mitigation of Wind Turbine Utilizing Individual Pitch Control in Stable ABL

    Oe, Harutaka / Tanabe, Yasutada / Sugawara, Hideaki et al. | AIAA | 2016


    IMPROVED INDIVIDUAL PITCH CONTROL FOR WIND FARM TURBINE LOAD REDUCTION VIA WAKE MODELLING

    Yang, Z. / Li, Y. / Seem, J. et al. | British Library Conference Proceedings | 2011




    Fault tolerant control for wind turbine pitch actuators

    Rodellar Benedé, José / Acho Zuppa, Leonardo / Tutivén Gálvez, Christian et al. | BASE | 2015

    Free access