Abstract: A method for controlling operation of a wind turbine is described. The wind turbine includes a rotor having a plurality of rotor blades. The method includes measuring an atmospheric condition associated with the environment surrounding the wind turbine, providing the measured atmospheric condition to a processor, and determining at least one monitor set point limit based at least partially on the measured atmospheric condition. The method also includes applying the at least one monitor set point limit to wind turbine operation.

Abstract: A method for mounting components at a wind turbine support unit of a wind turbine is provided. The method includes the steps of providing a captive bolt gun, providing a fastening means, inserting a captive bolt into the fastening means, and shooting the captive bolt into the wind turbine support unit by means of the captive bolt gun such that the fastening means is fixed at the wind turbine support unit.

Abstract: The disclosure concerns a wind power plant and its operation during grid loss, wherein the wind power plant comprises a plurality of rotor blades, a blade pitch drive, a rotor shaft, an electric generator, and a control unit for controlling the operations of the wind power plant, wherein the plurality of rotor blades are rotatably connected to the rotor shaft, such that the pitch of the rotor blades can be adjusted by the blade pitch drive under the control of the control unit, and wherein the rotor shaft is operatively connected to the electric generator for generating electric energy, the wind power plant further comprising an energy storing unit for powering the blade pitch drive, wherein the control unit comprises a control module for adjusting the rotor blades and for entering a self-sustaining mode of operation of the wind power plant.

Abstract: A damper system for damping base frame vibrations of a wind turbine having a tower, a nacelle, a frame in the nacelle, at least one rotor blade, and a generator, the damper system includes a mass for damping vibrations of the frame, wherein the mass is positioned outside a vibration center and at least one drive mechanism adapted for actively controlling a movement of the mass. A method for reducing frame vibrations of a wind turbine is provided.

Abstract: A wind turbine is disclosed. The wind turbine includes a synchronous generator having a stator and a rotor, and an AC-DC-AC link for coupling the synchronous generator to a grid, the AC-DC-AC link including a DC link. The DC link is used for supplying an excitation voltage to a rotor winding of the rotor. A DC-DC converter connects the DC link to the rotor winding of the rotor.

Abstract: A wind turbine is provided, the wind turbine comprising, a synchronous generator having a stator and a rotor, an AC-DC-AC link for coupling said synchronous generator to a grid, wherein the DC link is connected to the rotor of said synchronous generator for supplying an excitation voltage to a rotor winding of said rotor. Furthermore, a method of starting a wind turbine with an electrically excited synchronous generator is provided, the method comprising the steps of (a) opening a grid contactor; (b) closing a bypass contactor to bypass a grid-side DC-AC inverter of said wind turbine; (c) charging a DC link of said wind turbine; (d) supplying an excitation voltage to rotor windings of said synchronous generator, wherein said excitation voltage is supplied from the DC link; and (e) opening said bypass connector and closing said grid connector.

Abstract: A wind turbine braking system including: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applying an electrical load to the generator converter.

Abstract: A wind turbine braking system including: a wind turbine including turbine blades and a control system; a generator coupled to the turbine blades; a generator converter coupled to the generator and connectable to a utility power grid; at least one dump resistor coupled to the generator and generator converter, and if the utility power grid losses power, the dump resistor applying an electrical load to the generator converter.

Abstract: An emergency pitch drive power supply is provided, the emergency pitch drive power supply comprising an auxiliary generator for producing electric power, wherein the auxiliary generator is a permanently excited multi-pole generator adapted to generate sufficient power for a pitch drive of a wind turbine when driven with wind rotor speed, and wherein the auxiliary generator is connected to at least one pitch drive motor of the wind turbine.