| 摘要 |
<p>The underlying purpose of the invention is to create an additional apparatus as a 'second emergency apparatus', in the case that one or multiple standard emergency devices are failing to adjust the rotor-blade angle of one or multiple rotor blades, into a position of a power limitation. The method to decelerate a wind turbine in case of an emergency by adjusting the rotor blades for wind turbines with power control by the concept of pitch control or active stall control,and for each rotor blade with at least one actuator and at least one position brake to secure the position of one rotor blade, includes a redundancy for emergency,in order to open one or multiple position brakes (10), which fixate the rotor blade (29) against pitching, depending on the required rotor blade direction of turning, the brake resp.the brakes opens resp. open, and in case of a unwanted direction of rotation, the position-brake resp. the position-brakes (10) closes resp. are closing or kept/held closed. The inventive devices contains at least one actuator (13), once with at least one active position brake (10),and once with at least one passive position-brake (10), and each with corresponding parts for fulfilling the function of the apparatus.</p> |
