SYSTEM AND METHOD FOR VARIATION OF THE PITCH ANGLE POSITION OF ROTOR BLADES OF A WIND ENERGY INSTALLATION

摘要

The invention relates to a system (200) for variation of the pitch angle position of rotor blades (1) of a wind energy installation, with drive units (2, 21, 22) which are in each case individually associated with the rotor blades (1), and closed-loop control devices (31, 32) which are in each case individually associated with the drive units (2, 21, 22), in which system control connections (331, 332, 340) which can be switched by switching means (S) are provided, via which control connections, in the event of a failure or a malfunction of at least one closed-loop control device (31, 32) a drive unit (2, 21, 22) which is associated with this closed-loop control device (31, 32) can be operated in parallel with and at the same time as another drive unit (2, 21, 22), by means of a closed-loop control device (31, 32) which is associated with the other drive unit (2, 21, 22).