... turbine using a CVT. The wind turbine with CVT is simulated using two controllers: a proportional-integral controller and a nonlinear torque controller of the type commonly used in the wind industry. The manufacturer-reported CVT efficiency rates that we have obtained have been between 84.2% and 95.5...

.... Associate Editor: D. Berg. 20 January 2004 24 June 2004 18 11 2004 wind turbines torque control optimal control adaptive control Figure 1 is an example of a C p -TSR-Pitch surface, created using the modeling software PROP, developed by Walker and Wilson 1...

... that observability of this mode decreased when blade pitch angles approached zero. The generator torque controller is designed from this state-space model. The poles are placed to add significant damping to the first drive train torsion mode, because the system is controllable. In addition, state estimation...

...Karl A. Stol A composite linear state-space controller was developed for a multi-objective problem in the variable-speed operation of wind turbines. Disturbance Tracking Control theory was applied to the design of a torque controller to optimize energy capture under the influence of persistent wind...