In a first aspect, the present invention provides 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 comprises determining the speed of the rotor, determining the fore-aft speed of the
nacelle, and calculating a difference between the determined speed of the rotor and a predefined speed of reference of the rotor. After,
pitch commands are obtained by performing a PID control of this calculated difference of speeds, said PID control being tuned for adapting the sensitivity of the PID control as a function of the determined fore-aft speed of the nacelle. Then, the one or more
pitch systems pitch the blades in accordance with said obtained pitch commands.