Individual Pitch Control for Large Scale Wind Turbines: A multivariable control approach

In the next decennia, upscaling even towards 10 MW wind turbi nes may be necessary to lower the costs of offshore wind energy. This requires considerable re ductions of turbine loads. Variable speed turbines with active pitch control are most favorable and pr evailing nowadays. Currently, the turbine blades are turned collectively to limit the excess of wi nd power and to regulate the rotor speed above rated wind conditions. To reduce the blade and tower lo ads, it has been shown that Individual Pitch Control (IPC) is much promising. A multivariable contro l c ncept using advanced feedbackfeedforward control method is implemented for IPC and is comp ared with the traditional scalar control concept. The advantage of using such a control concept is also shown.

[1]  Torben J. Larsen,et al.  Active load reduction using individual pitch, based on local blade flow measurements , 2005 .

[2]  Ervin Bossanyi,et al.  Wind Turbine Control for Load Reduction , 2003 .

[3]  Ervin Bossanyi,et al.  Further load reductions with individual pitch control , 2005 .

[4]  Alan Wright,et al.  Design of Controls to Attenuate Loads in the Controls Advanced Research Turbine , 2004 .

[5]  J. Doyle.  Synthesis of robust controllers and filters , 1983, The 22nd IEEE Conference on Decision and Control.

[6]  V. Verdult,et al.  ESTIMATION AND ROBUSTNESS ANALYSIS OF ACTUATOR FAULTS BASED ON KALMAN FILTERING , 2022 .

[7]  Michel Verhaegen,et al.  A systematic and numerically efficient procedure for stable dynamic model inversion of LTI systems , 1999, Proceedings of the 38th IEEE Conference on Decision and Control (Cat. No.99CH36304).

[8]  Karl Stol,et al.  Disturbance Tracking and Blade Load Control of Wind Turbines in Variable-Speed Operation , 2003 .

[9]  Wayne Johnson,et al.  Self-Tuning Regulators for Multicyclic Control of Helicopter Vibration , 1982 .

[10]  Ervin Bossanyi,et al.  Individual Blade Pitch Control for Load Reduction , 2003 .

[11]  B. H. Bulder,et al.  Fatigue Equivalent Load Cycle Method A General Method to Compare the Fatigue Loading of Different Load Spectrums , 1995 .

[12]  Ian Postlethwaite,et al.  Multivariable Feedback Control: Analysis and Design , 1996 .

[13]  Robert P. Coleman,et al.  Theory of self-excited mechanical oscillations of helicopter rotors with hinged blades , 1958 .

[14]  C. L. Archer,et al.  Evaluation of global wind power , 2005 .

[15]  A. D. Wright,et al.  Modern Control Design for Flexible Wind Turbines , 2004 .

[16]  T. G. van Engelen.  Design model and load reduction assessment for multi-rotational mode individual pitch control (higher harmonics control) , 2006 .