Abstract: A blade tip for a rotor blade of a wind turbine, and a method of inserting the blade tip into a rotor blade are provided. The blade tip for the rotor blade of a wind turbine simplifies the installation and the replacement of the blade tip as well as a method of inserting such a blade tip. The blade tip can be inserted by means of an adjustable clamping wedge so as to simplify replacement of the tip if necessary. The associated method of inserting the blade tip outside the shell mould removes the likelihood of damage to the shell mould due to sawing.

Abstract: A wind turbine component has a laminate of fibrous material and plastic and an electrical line embedded in the laminate, wherein a profile is arranged on a lateral surface of the electrical line, the profile counteracting the formation of a hollow space or plastic nest between the lateral surface and a fibrous material layer which covers an upper side of the electrical line during the manufacture of the laminate.

Abstract: A method is provided for operating a wind turbine with a rotor having a rotor blade adjustable in its blade pitch angle. A generator is connected to the rotor and a measurement unit captures an actual value of a variable representative of a rotational speed of the generator. A set-point for a generator torque is provided and the set-point thereof is corrected. An actual value of a variable representative of a rotational speed of the generator is captured. A set-point for the torque as a function of the captured actual value is provided and the set-point for the torque as a function of a parameter for air density is corrected. A pitch angle value is captured and the set-point for the torque is increased when the captured value for the pitch angle exceeds a minimum value and has been corrected on the basis of an air density parameter.

Abstract: The invention is directed to a method for operating a wind turbine in the event of a grid error. The wind turbine has a rotor having a rotor blade adjustable in its blade pitch angle, a generator and a unit for capturing an actual value of the rotational speed of the generator, a value of the blade pitch angle and an actual value of a variable which is representative of a generator torque. The method includes recognizing a grid error; capturing the actual value of the generator torque and actual value of rotational speed of the generator when a grid error was recognized; determining a change in torque; capturing the pitch angle; determining a corrective value for the pitch angle in dependence upon the change in the generator torque and the value for the pitch angle; and, determining a corrected set-point for the pitch angle.

Abstract: A method for waking a wind turbine rotor blade half shell includes arranging a fibrous material in a mold, which has an inner side predetermining an aerodynamic surface of the half shell and has a pinching edge defining the profile of a trailing edge of the half shell. A liquid plastics material surrounding the fibrous material is cured. An insert is arranged in relation to the mold in a predetermined position, in which a surface of the insert and a bordering portion of the inner side of the mold conjointly define an acute angle tapering toward the pinching edge, so that a thinly tapering trailing edge of the half shell is formed between the surface of the insert and the bordering portion.

Abstract: A method for making a wind turbine member wherein a plurality Of components are arranged in a mold. The inner side of the mold determines a surface of the wind turbine member. The components are connected to one another. At least one of the components is a prefabricated structural element which has a fixed geometry with an outer surface. The prefabricated structural element has a positioning projection protruding out of the outer surface and the mold has, on its inner side, a positioning receptacle. The positioning projection is inserted positively into the positioning receptacle to determine the disposition of the prefabricated structural element in the mold.

Abstract: A wind turbine comprising a tower and a nacelle which is rotatably mounted on the tower and whose alignment is adjustable by way of a yaw system, wherein the yaw system has at least one adjusting drive, a rotatable yaw bearing, at least one brake disk and at least two brake units which can exert a braking torque on the brake disk, wherein the at least one of the brake units has a first brake pad with a first coefficient of friction, and at least one of the brake units has a second brake pad with a second coefficient of friction, wherein the first and the second coefficient of friction are different from each other.

Abstract: A wind energy plant comprising a gearbox with a gearbox housing, a rotor hub mounted outside of the gearbox and a satellite carrier in the gearbox housing, the satellite carrier having an input side and an output side. At the input side, the satellite carrier is only connected to the rotor hub and mounted in the gearbox housing without a bearing. At the output side, the satellite carrier is mounted in the gearbox housing via a torque bearing arranged in the gearbox housing on the output side of satellite carrier.

Abstract: A method for operating a wind turbine includes detecting a surface temperature of a component of the wind turbine and determining a risk of icing of the component of the wind turbine. A frost or dew point temperature of the ambient air is determined and a difference between the surface temperature and the frost or dew point temperature is evaluated during the determination of the risk of icing.

Abstract: A method controls the rotational speed of a wind turbine having a tower, a nacelle mounted on the tower and a drive train which includes a rotor having at least one rotor blade. The rotor is rotatably mounted about a rotor axis in the nacelle. The drive train further includes a generator configured to be driven by the rotor. In a nacelle-fixed reference system, the rotational speed (?G*) of a component of the drive train which rotates with the rotor in correspondence to a transmission ratio (Ue) is measured. A movement of the nacelle relative to the ground is measured and the rotational speed is controlled to a rotational speed setpoint with a speed controller which outputs a generator torque (MG) and/or a blade pitch angle (?). The measured rotational speed (?G*) is converted into a corrected rotational speed (?GC) which corresponds to the rotational speed of the rotor in a ground-fixed reference system multiplied by the transmission ratio (Ue).

Abstract: A wind turbine rotor blade is assembled from a first and a second rotor blade half shell made of a fiber-reinforced plastics material. An electrical heating arrangement includes a first heating element connected to the first rotor blade half shell and having a blade root end and a blade tip end and a second heating element connected to the second rotor blade half shell also having a blade root end and a blade tip end. The heating arrangement also includes a third heating element connected to the rotor blade half shells and having a blade root end and a blade tip end. The blade tip ends of the first, second and third heating elements are mutually electrically connected. The blade root ends of the first, second and third heating elements are connected to respective electrical connecting lines.

Abstract: Method for assembling a rotor blade for a wind turbine, wherein the rotor blade has a first half shell, a second half shell and at least one shear web running in the longitudinal direction of the rotor blade.

Abstract: The invention relates to a wind turbine rotor blade having a blade root, a blade tip, two interconnected rotor blade half shells, which include a fiber-reinforced plastics material, and an electrical heating element, which is arranged on an outer side of the rotor blade and has a blade root end and a blade tip end, wherein the blade tip end is connected via an electrical line leading to the blade root and at least a first segment of the electrical line, which is arranged on an inner side of one of the rotor blade half shells, is made of a carbon fiber material. Further, the present invention relates to a method for making a wind turbine rotor blade having an electrical heating element.

Abstract: A blade connection for a rotor blade of a wind turbine having a plurality of receptacles which extend in the longitudinal direction of the rotor blade and can each receive a longitudinal bolt and are in contact with a component having an inner thread for the longitudinal bolt. The rotor blade is manufactured from two materials, at least in the region of the blade connection, wherein a first material is a composite material, and a second material is a composite material provided with at least one reinforcement layer made of metal and/or ceramic. The receptacles are composed of the first material and the second material is bonded to the first material.

Abstract: A gearbox for a wind energy plant, with a satellite carrier, which is connected to a rotor shaft or a rotor hub at its input side and which is mounted via a bearing arranged in a gearbox housing, wherein the bearing is arranged in the gearbox housing at the output side of the satellite carrier, and a torque bearing is provided as the bearing for the satellite carrier.

Abstract: 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.

Abstract: Method for the emergency braking of a wind power plant, in which at least one rotor blade of the wind power plant is adjusted into its feathering position, wherein a first phase, in which the at least one rotor blade is adjusted with a first speed, and a second phase, in which the at least one rotor blade is adjusted as of a predetermined first blade pitch angle with a second speed, which is increased until a maximum speed is reached and/or until a second determined blade pitch angle is reached.

Abstract: A wind farm with plural wind turbines which are connectible to a farm grid that is in turn connectible to an electricity supply mains via a connection point, wherein the wind farm features the following: a central control system, which determines a correction value for a local desired value for one or plural wind turbines by way of a first regulator, depending on an actual value of an electric variable before or after the connection point, and a turbine control for at least one wind turbine, which determines a local desired value for an electric variable to be generated by the wind turbine by way of a second regulator, depending on an actual value of an electric variable measured in the farm grid, wherein the turbine control determines the sum of the local desired value and the correction value as the total desired value for the electric variable of the wind turbine to be generated.

Abstract: The invention is related to a rotor shaft for a wind energy plant, wherein the rotor shaft is at least partially hollow, comprising a line pipe, extending in the interior of the rotating rotor shaft and being stationary and accommodating electric lines, a transmission device, arranged at least partially in the rotor shaft, for the electric connection between a stationary nacelle and a rotating rotor of the wind energy plant, wherein the transmission device features a first body, stationary and connected to the line pipe, and a second body rotating with the rotor shaft, and wherein there is an electric sliding contact between the first and the second body, a casing surrounding the transmission device and formed separately from the second body, which is connected to the rotor shaft and/or adapted to be connected to a rotor hub of the wind energy plant, and which rotates with the rotor shaft, and a torque transmitting connection between the casing and the second body of the transmission device.

Abstract: The present invention is related to a method for determining a characteristic curve (9) for an electric variable (Pel, Q, ?, cos ?, IP, IQ) of a wind energy plant (1). According to the present invention, it is provided that at least one characteristic value of the electric variable (Pel, Q, ?, cos ?, IP, IQ) is measured for at least one value of the wind (vW), and for the at least one value of the wind (vW), a characteristic value of the electric variable (Pel, Q, ?, cos ?, IP, IQ) is adapted from a predetermined characteristic curve (7) containing characteristic values of the electric variable (Pel, Q, ?, cos ?, IP, IQ) as a function of different values of the wind (vW), taking into account the characteristic value measured for the at least one value of the wind (vW).