Patent ID: 9476407
Filing Date: 2016-10-25
CPC Classification: F03D,F05B,Y02E

Claim Text:
1. A method of operating a wind turbine having a rotor with a plurality of blades, a nacelle, one or more pitch systems for pitching the blades, a system for determining a speed of the rotor, and a system for determining a fore-aft speed of the nacelle; the method comprising: determining the speed of the rotor; determining the fore-aft speed of the nacelle; calculating a difference between the determined speed of the rotor and a predefined speed of reference of the rotor; obtaining pitch commands by performing a PID control of the calculated difference of speeds, wherein the PID control is tuned for adapting the sensitivity of the PID control as a function of the determined fore-aft speed of the nacelle; and the one or more pitch systems pitching the blades in accordance with the obtained pitch commands.