In above rated conditions, wind turbines are often subjected to undesirable high struc- tural loa... more In above rated conditions, wind turbines are often subjected to undesirable high struc- tural loading. We investigate two feedback control techniques in combination with a feed- forward control method for reducing blade ap bending loads in above rated wind con- ditions. The feedback controls studied include both disturbance accommodating/tracking and integral augmented/repetitive types that incorporate models of persistent disturbances at
AbstractWe review the objectives and techniques used in the control of horizontal axis wind turb... more AbstractWe review the objectives and techniques used in the control of horizontal axis wind turbines at the individual turbine level, where controls are applied to the turbine blade pitch and generator. The turbine system is modeled as a flexible structure operating in the presence ...
Light detection and ranging systems are able to measure conditions at a distance in front of wind... more Light detection and ranging systems are able to measure conditions at a distance in front of wind turbines and are therefore suited to providing preview information of wind disturbances before they impact the turbine blades. In this study, preview-based disturbance feedforward control is investigated for load mitigation. Performance is evaluated assuming highly idealized wind
measurements that rotate with the blades and more realistic stationary measurements. The results obtained using idealized, "best case" measurements show that excellent performance gains are possible with reasonable pitch rates. However, the results using more realistic wind measurements show that without further optimization of the controller and/or better processing of measurements, errors in determining the shear local to each blade can remove any advantage obtained by using preview-based feedforward techniques.
In above rated conditions, wind turbines are often subjected to undesirable high struc- tural loa... more In above rated conditions, wind turbines are often subjected to undesirable high struc- tural loading. We investigate two feedback control techniques in combination with a feed- forward control method for reducing blade ap bending loads in above rated wind con- ditions. The feedback controls studied include both disturbance accommodating/tracking and integral augmented/repetitive types that incorporate models of persistent disturbances at
AbstractWe review the objectives and techniques used in the control of horizontal axis wind turb... more AbstractWe review the objectives and techniques used in the control of horizontal axis wind turbines at the individual turbine level, where controls are applied to the turbine blade pitch and generator. The turbine system is modeled as a flexible structure operating in the presence ...
Light detection and ranging systems are able to measure conditions at a distance in front of wind... more Light detection and ranging systems are able to measure conditions at a distance in front of wind turbines and are therefore suited to providing preview information of wind disturbances before they impact the turbine blades. In this study, preview-based disturbance feedforward control is investigated for load mitigation. Performance is evaluated assuming highly idealized wind
measurements that rotate with the blades and more realistic stationary measurements. The results obtained using idealized, "best case" measurements show that excellent performance gains are possible with reasonable pitch rates. However, the results using more realistic wind measurements show that without further optimization of the controller and/or better processing of measurements, errors in determining the shear local to each blade can remove any advantage obtained by using preview-based feedforward techniques.
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Papers by Jason Laks
Papers/Reports by Jason Laks
measurements that rotate with the blades and more realistic stationary measurements. The results obtained using idealized, "best case" measurements show that excellent performance gains are possible with reasonable pitch rates. However, the results using more realistic wind measurements show that without further optimization of the controller and/or better processing of measurements, errors in determining the shear local to each blade can remove any advantage obtained by using preview-based feedforward techniques.
measurements that rotate with the blades and more realistic stationary measurements. The results obtained using idealized, "best case" measurements show that excellent performance gains are possible with reasonable pitch rates. However, the results using more realistic wind measurements show that without further optimization of the controller and/or better processing of measurements, errors in determining the shear local to each blade can remove any advantage obtained by using preview-based feedforward techniques.