Patent ID: 7705481

Claim:
A wind energy plant having at least one rotor blade with a pitch angle, the pitch angle being adjustable by means of a pitch controller, and a generator converter unit, at least one electrical quantity of the generator converter unit being adjustable by means of a converter controller, wherein the wind energy plant has a power train with a rotor having the at least one rotor blade, the rotor being disposed at a front end of the power train and the power train leading to the generator converter unit, characterized in that a first rotation speed detection unit ( 30 ) is provided at the power train near the front end of the power train and a second rotation speed detection unit ( 24 ) is provided at the power train near the generator converter unit ( 22 ), wherein the measured rotation speed (n rot ) of the first rotation speed detection unit ( 30 ) is applied as an input variable to the pitch controller ( 36 ) and the measured rotation speed of the second rotation speed detection unit ( 24 ) is applied as an input variable to the converter controller ( 28 ).