Smart rotor control of wind turbines under actuator limitations

As the diameters of wind turbine rotors increases, the loads across the rotors are becoming more uneven due to the inhomogeneous wind fields. Therefore more advanced sensors as well as passive and active load reduction techniques are introduced to improve the controller performance. We investigate two methods to consider the saturation and rate limits of the pitch and trailing edge flaps during individual pitch and trailing edge flap control implementation. We compare two saturation and rate limit implementations in the rotating and non-rotating frame of reference. The results show that considering the saturation in the non-rotating frame of reference leads to a more straightforward controller design and implementation.

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