Nonlinear robust control to maximize energy capture in a variable speed wind turbine using an induction generator

The emergence of wind turbine systems for electric power generation can help satisfy the growing global demand. This paper proposes a control strategy to maximize the wind energy captured in a variable speed wind turbine, with an internal induction generator, at low to medium wind speeds. The proposed strategy controls the tip speed ratio, via the rotor angular speed, to an optimum point at which the efficiency constant (or power coefficient) is maximal for a particular blade pitch angle and wind speed. This control method allows for aerodynamic rotor power maximization without exact wind turbine model knowledge.

[1]  R. Datta,et al.  Direct power control of grid-connected wound rotor induction machine without rotor position sensors , 2001 .

[2]  Erkan Zergeroglu,et al.  Adaptive backstepping control of variable speed wind turbines , 2008, Int. J. Control.

[3]  K. Gopakumar,et al.  Vector control of induction motor with split phase stator windings , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[4]  R. Cavin,et al.  Transient Load Model of an Induction Motor , 1973 .

[5]  P.V. Kokotovic,et al.  The joy of feedback: nonlinear and adaptive , 1992, IEEE Control Systems.

[6]  R. Chedid,et al.  Adaptive fuzzy control for wind-diesel weak power systems , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[7]  R. W. De Doncker,et al.  Doubly fed induction generator systems for wind turbines , 2002 .

[8]  Darren M. Dawson,et al.  Adaptive control of induction motor systems despite rotor resistance uncertainty , 1995, Proceedings of 1995 American Control Conference - ACC'95.

[9]  Weiqing Wang,et al.  Fuzzy Control of Variable Speed Wind Turbine , 2006, 2006 6th World Congress on Intelligent Control and Automation.

[10]  V. T. Ranganathan,et al.  A simple position-sensorless algorithm for rotor-side field-oriented control of wound-rotor induction machine , 2001, IEEE Trans. Ind. Electron..

[11]  Palle Andersen,et al.  Comparing PI and Robust Pitch Controllers on a 400kw Wind Turbine by full scale Tests , 1997 .

[12]  D. Dawson,et al.  Nonlinear robust control to maximize energy capture in a variable speed wind turbine , 2008, 2008 American Control Conference.

[13]  Torbjörn Thiringer,et al.  Comparison of reduced-order dynamic models of induction machines , 2001 .

[14]  Jon Clare,et al.  Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation , 1996 .

[15]  Mark J. Balas,et al.  Full-State Feedback Control of a Variable-Speed Wind Turbine: A Comparison of Periodic and Constant Gains , 2001 .

[16]  R. Datta,et al.  Variable-Speed Wind Power Generation Using a Doubly Fed Wound Rotor Induction Machine: A Comparison with Alternative Schemes , 2002, IEEE Power Engineering Review.

[17]  Kathryn E. Johnson,et al.  Methods for Increasing Region 2 Power Capture on a Variable-Speed Wind Turbine , 2004 .

[18]  G. Tapia,et al.  Modeling and control of a wind turbine driven doubly fed induction generator , 2003 .

[19]  Brad S. Liebstt.  A pitch control system for large scale wind turbines , 1981 .

[20]  Bradley S. Liebst.  Pitch control system for large-scale wind turbines , 1983 .

[21]  Weiping Li,et al.  Applied Nonlinear Control , 1991 .

[22]  M. J. Balas,et al.  Non-Linear and Linear Model Based Controller Design for Variable-Speed Wind Turbines , 1999 .

[23]  M. O'Malley,et al.  The inertial response of induction-machine-based wind turbines , 2005, IEEE Transactions on Power Systems.

[24]  Y. D. Song,et al.  Variable speed control of wind turbines using nonlinear and adaptive algorithms , 2000 .

[25]  V. T. Ranganathan,et al.  Variable-Speed Wind Power Generation Using a Doubly Fed Wound Rotor Induction Machine: A Comparison with Alternative Schemes , 2002 .

[26]  Riccardo Marino,et al.  Global adaptive output feedback control of induction motors with uncertain rotor resistance , 1996, Proceedings of 35th IEEE Conference on Decision and Control.

[27]  R. Marino,et al.  Adaptive input-output linearizing control of induction motors , 1993, IEEE Trans. Autom. Control..