Abstract: A method of assembling a pitch assembly for use with a wind turbine. The wind turbine includes a rotor and a plurality of rotor blades coupled to the rotor. The method includes coupling a pitch drive system to at least one of the plurality of rotor blades for rotating the rotor blade about a pitch axis. At least one sensor is coupled in signal communication with the pitch drive system. The pitch drive system rotates the rotor blade when the sensor senses rotor overspeed.

Abstract: A braking system for a wind turbine is provided, and the wind turbine includes a rotor having at least one blade. A generator includes a plurality of stator windings having a plurality of phases. The braking system includes a plurality of resistors, and at least one switch connected between the stator windings and the resistors. The switch can be configured to connect the stator windings to each other via the resistors, for the effect of slowing down or stopping the rotor of the wind turbine.

Abstract: A redundant and fail-safe blade system of a wind turbine includes at least one blade pitch drive (20, 21, 22) and at least two power control modules (60, 61, 62, 6?) for controlling the blade pitch drive (20, 21, 22). The power control modules (60, 61, 62, 6?) are connected to the blade pitch drive (20, 21, 22) by a switching unit (10) which allows an alternative connection between the blade pitch drive (20, 21, 22) and any of the power control modules (60, 61, 62, 6?). In operation, the blade pitch drive (20, 21, 22) is controlled by only one of the power control modules (60, 61, 62, 6?). If a malfunction of the currently operating power control module (60, 61, 62, 6?) is detected, switching unit (10) provides a connection to the other power control module (60, 61, 62, 6?) to allow an ongoing operation of the wind turbine without an unplanned or forced shut-down.

Abstract: A wireless sensing device for use in a wind turbine having a sensor capable of measuring one or more parameters for wind turbine operation. The sensing device also include a transmission device capable of wirelessly transmitting one or more signals corresponding to the one or more measured parameters to a controller. An independent power source is included to power the transmission device and the sensor. A method for system for operating and monitoring wind turbine operation are also disclosed.

Abstract: A wind turbine which is composed of several subunits is provided. Each of the several subunits includes a controller. Each of the controllers is adapted to operate in a cooperative mode and in an isolated mode. In the cooperative mode, one of the controllers operates as a master controller and the remaining controllers operate as slave controllers. In the isolated mode, each subunit is exclusively controlled by its respective controller, wherein each of the controllers acts as an independent master controller for its subunit. Further, a method for operating a wind turbine which includes at least two subunits is provided. Each of the at least two subunits includes at least one sensor, at least one actuator and a controller. The method for operating the wind turbine is carried out independently in each subunit and includes detecting at least one sensor signal; and determining and transferring a command to at least one actuator.

Abstract: A wind turbine having at least one rotor blade attached to a rotor hub is provided, wherein the wind turbine further includes at least one sensor disposed at or near the rotor blade, the sensor being adapted to detect an aerodynamic condition of the rotor blade.

Abstract: A redundant and fail-safe blade system of a wind turbine includes at least one blade pitch drive (20, 21, 22) and at least two power control modules (60, 61, 62, 6?) for controlling the blade pitch drive (20, 21, 22). The power control modules (60, 61, 62, 6?) are connected to the blade pitch drive (20, 21, 22) by a switching unit (10) which allows an alternative connection between the blade pitch drive (20, 21, 22) and any of the power control modules (60, 61, 62, 6?). In operation, the blade pitch drive (20, 21, 22) is controlled by only one of the power control modules (60, 61, 62, 6?). If a malfunction of the currently operating power control module (60, 61, 62, 6?) is detected, switching unit (10) provides a connection to the other power control module (60, 61, 62, 6?) to allow an ongoing operation of the wind turbine without an unplanned or forced shut-down.

Abstract: Method for operating a frequency converter of a generator The method relates to the operation of a frequency converter of a generator in particular of a wind energy turbine, in the event of a substantial grid voltage drop, wherein the frequency converter (10) comprises an AC/DC converter (20), to be connected to the generator (14), a DC/AC converter (22) to be connected to the voltage grid (18), and a DC link circuit (24) for connecting the AC/DC converter (20) to the DC/AC converter (22). The method comprises the step of reducing an output voltage of the DC link circuit (24) for increasing an output current of the DC/AC converter (22) and/or reducing the operation frequency of electronic switches (28) of the DC/AC converter (22) for increasing the output current of the DC/AC converter (22).