Abstract: A control device is provided which is adapted for controlling at least one operational parameter of a wind turbine including a machine nacelle and a rotor having at least one rotor blade. The control device includes an input adapted for inputting a signal which is indicative of environmental data of the wind turbine, an evaluation unit adapted for generating at least one control signal on the basis of currently acquired environmental data and on the basis of previously acquired environmental data, and an output adapted to output the control signal adapted for adjusting the at least one operational parameter of the wind turbine.

Abstract: A wind turbine comprising a main generator, a main power converter connected to the main generator and adapted to convert the electrical output power of the main generator to an electrical power to be fed into the utility grid up to a first rated converter output power and an auxiliary power converter connected to the main generator and adapted to convert the electrical output power of the main generator to an electrical power up to a second rated converter output power which is lower than the first rated converter output power is provided. Further, a control architecture for controlling the power balance of a wind turbine and a method for operating a wind turbine are provided.

Abstract: A fluidic system mechanically coupled to a mechanical component is provided. The fluidic system comprises a first pump of a first type coupled to the mechanical component and a second pump of a second type in fluid communication with the first pump. The fluidic system can operate in a pumping mode in which at least the first pump feeds a fluid through the fluidic system. The fluidic system can further operate in an actuating mode in which the second pump feeds the fluid through the fluidic system and the first pump extracts energy from the fluid flow. Further, a drive train for a wind turbine and method for actuating a mechanical component are provided.

Abstract: The invention concerns a method for reducing mechanical oscillation in a wind power plant which comprises a plurality of rotor blades, a wind turbine drive train and a generator, wherein the rotor blades are rotatably connected to the generator by the wind turbine drive train. The method comprises the steps: mathematically modeling the dynamical response and/or transfer function of a group of rotatable parts of the wind power plant, the group of rotatable parts comprising at least the wind turbine drive train, and determining dynamical response and/or transfer function of the group; in operation of the wind power plant, determining a first parameter characteristic of the mechanical oscillation at a first location, controlling the operation of at least one rotatable part in response to the dynamical response and/or transfer function of the group and at least the first parameter. In effect, resonance induced mechanical wear is reduced which leads to an increased life time of the wind power plant.

Abstract: The present invention relates to a preassembled tower section of a wind power plant and a method of transporting a tower section of a wind power plant, the method comprising the steps providing the tower section at a preassembly site, preassembling at least one electronic subsystem of the wind power plant onto the tower section, transporting the preassembled tower section from the preassembly site to an installation site. In effect transport thereof is considerably simplified and a higher degree of modular design and preassembly is achieved.

Abstract: A method for operating a wind farm which includes a wind farm control system and at least two wind turbines, which are connected via an internal grid, is provided. The method includes determining the actual power consumption of the wind farm; and adjusting the power production of at least one of the wind turbines so that the actual power production and actual power consumption of the wind farm are substantially equal. Further, a method for operating a wind farm which includes a wind farm control system and several power sources, are connected via an internal grid, is provided. At least two of the power sources are wind turbines and at least one power source is an additional power source selected from a group consisting of a fuel power source, a battery-based power source and a solar power source.

Abstract: A method of positioning a wind turbine rotor comprises defining a predetermined angular position in a main rotation plane of the rotor and controlling a rate of deceleration of the rotor, such as to stop the rotor at the predetermined angular position.

Abstract: A multi-section blade for a wind turbine comprising at least one non-pitchable section and at least one pitchable section is provided. The non-pitchable section is configured to be fixed to a hub of the wind turbine. The pitchable section is configured to be rotated about a pitch axis which is substantially parallel to the span of the multi-section blade. A pitch bearing and a pitch motor are located within the blade and near the non-pitchable section and pitchable section interface.