Patent application number | Description | Published |
20090193894 | APPARATUS FOR MONITORING THE ROTATIONAL SPEED IN A WIND ENERGY PLANT - An apparatus for monitoring the rotational speed in a wind energy plant, with a rotor shaft which is driven by the rotor and runs out into a gear unit, and with a generator shaft, which connects an output shaft of the gear unit with a generator/converter unit, characterised by a first rotational speed detection unit on the rotor shaft and a second rotational speed detection unit on the generator shaft, wherein each rotational speed detection unit has at least two rotational speed sensors working independently from each other, an analysing unit for the rotational speed, to which the measured signals of the rotational speed detection units are applied and which generates an error signal for a rotational overspeed when a certain maximum value for the rotational speed is exceeded. | 08-06-2009 |
20090212565 | WIND ENERGY PLANT WITH PITCH CONTROLLER - A wind energy plant having at least one rotor blade with a pitch angle, the pitch angle being adjustable by means of a pitch controller, and a generator converter unit, at least one electrical quantity of the generator converter unit being adjustable by means of a converter controller, wherein the wind energy plant has a power train with a rotor having the at least one rotor blade, the rotor being disposed at a front end of the power train and the power train leading to the generator converter unit, wherein a first rotation speed detection unit is provided at the power train near the front end of the power train and a second rotation speed detection unit is provided at the power train near the generator converter unit, wherein the measured rotation speed n | 08-27-2009 |
20090212566 | METHOD FOR OPERATING A WIND ENERGY PLANT AND WIND ENERGY PLANT - The invention relates to a method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, and a regulation means which, if a there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by a reduction of a preset value for the generator, wherein prior to the regulation means noticing a deviation of the rotation speed of the rotor or generator from the rotation speed set point effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle is initiated, wherein at the new pitch angle the rotation speed of the rotor or the generator reaches the rotation speed set point at the reduced electrical quantity and the current wind speed. In addition, the invention relates to a wind energy plant. | 08-27-2009 |
20090212567 | CONTROLLER FOR A BLADE ADJUSTMENT ANGLE OF AT LEAST ONE ROTOR BLADE OF A WIND POWER PLANT - Controller for a blade adjustment angle for at least one rotor blade of a wind power plant, in which a first controller branch is switched for the determination of the blade adjustment angle depending on the operating states of the wind power plant, wherein at least one differentiating member is provided in the switched first controller branch. | 08-27-2009 |
20100124498 | WIND ENERGY PLANT WITH A CENTRAL CONTROL DEVICE AND A CONTROL UNIT IN THE ROTOR AND METHOD FOR THE OPERATION OF SUCH A WIND ENERGY PLANT - A wind energy plant with a nacelle, a rotor, which features at least one rotor blade adjustable in its blade pitch angle, a central control device for controlling the wind energy plant and a control unit disposed in the rotor for controlling the blade pitch angle of the at least one rotor blade, wherein the central control device and the control unit in the rotor can exchange data with each other via a data link, which comprises at least one first sending and receiving device at the nacelle side and at least one second sending and receiving device at the rotor side, wherein a wireless network connection with a safety-oriented communication protocol is provided between the at least one first sending and receiving device and the at least one second sending and receiving device, and that one monitoring- and communication device at a time is associated to the first and/or the second sending and receiving device, which can monitor the function of the sending and receiving device and initiate a predetermined action in the case of an error. | 05-20-2010 |
20100225113 | METHOD FOR THE OPERATION OF A WIND TURBINE AND WIND TURBINE USING THIS METHOD - A method for the operation of a wind turbine comprising a rotor with at least one rotor blade, a generator and a speed regulator for regulating the rotational speed of a drive train element by adjusting a generator torque and/or a blade pitch angle, comprising the steps of: determining the angular speed of the drive train element through the time derivative of an angular position signal, determining the angular acceleration of the drive train element, presetting desired values for the generator torque and/or the blade pitch angle taking into account the angular speed of the drive train element and the angular acceleration of the drive train element, wherein the angular acceleration of the drive train element is determined from the angular position signal, wherein a filtering with an upper cut off frequency is performed after the first time derivative of the angular position signal and before a second time derivative of the angular position signal, said upper cut off frequency being tuned to a maximum adjustment speed of the generator torque and/or of the blade pitch angle. | 09-09-2010 |
20100320761 | METHOD FOR THE OPERATION OF A WIND TURBINE, AND WIND TURBINE FOR CARRYING OUT THIS METHOD - A method of operating a wind turbine, comprising the steps of measuring a meteorological value and using the measured meteorological value to preset a desired value for the turbine operation, to select an operation condition and/or to determine a boundary condition for the turbine operation, wherein the measured meteorological value is an air mass flow caused by the wind. | 12-23-2010 |
20120146332 | Method for Operating a Pitch-Controlled Wind Turbine - The invention is directed to a method for operating a pitch-controlled wind turbine having a rotor blade adjustable about its longitudinal axis and having a generator wherein a set-point for a generator torque (M) is specified in dependence upon a rotational speed (n) of the generator or of the rotor. A transition point (n | 06-14-2012 |
20120148402 | Method for Operating a Pitch-Controlled Wind Turbine - Method for operating a pitch-controlled wind turbine, in which a set-point value for the generator torque (M) is prescribed in dependence upon a rotational speed (n) of the generator or of the rotor. A transition point (n | 06-14-2012 |