Patent ID: 7204673
Filing Date: 2007-04-17
Classification: F03D,F05B,Y02E

Abstract:
1. A method of controlling a wind power installation including a pylon, a machine housing and a rotor with rotor blades, the method comprising: moving the rotor blades of the wind power installation into a first position with respect to the machine housing when wind speed is above a first predetermined value which is greater than 20 m/s; when wind speed is above a second predetermined value, allowing the wind to move the machine housing into an azimuth position such that the rotor and rotor blades are down wind from a rear end of the machine housing and from the pylon; and adjusting the rotor blades' position such that their position with respect to the main wind direction remains substantially unchanged after the machine housing has moved into a down wind position from their position with respect to the main wind direction in their first position.