Abstract: A method and manufacturing unit for producing a rotor blade (5) of a wind turbine (1) from at least a first rotor blade element (11, 11?, 12, 12?) and a second rotor blade element (11, 11?, 12, 12?). The first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?) are positioned in the desired relative arrangement with respect to each other such that a joint gap (13) remains between the first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?). Adhesive is introduced into the joint gap (13) for joining the first rotor blade element (11, 11?, 12, 12?) and the second rotor blade element (11, 11?, 12, 12?).

Abstract: The invention relates to a method for operating a wind turbine by switching on an aircraft warning light, the luminaries of which comprise LEDs, said LEDs radiating light with a maximum intensity in the range of visible light. At least one NIR LED is switched on when the aircraft warning light is switched on, said at least one NIR light source radiating light with a maximum intensity in the NIR range.

Abstract: A harmonic predictor for a wind farm comprising at least two wind turbines, each having a generator with a converter for generating electrical energy. The harmonic predictor determines the harmonic component expected from the wind farm in order to limit the harmonic component to a harmonic limit. The harmonic predictor comprises a calculation module, an iteration module and a summing module. The calculation module calculates a complex mean value over at least one period of the harmonic component of one of the wind turbines and determines a first equivalent vector therefrom. The iteration module successively connects the calculation module to at least one other of the wind turbines to form at least one second equivalent vector. The summing module sums the equivalent vectors to form a total vector and compares the total vector with the harmonic limit.

Abstract: A tubular tower (11), of a wind energy plant (10) with a current conduction means system (25, 35) for transmitting electrical power from a generator on the tower (11), to a power module at the base of the tower. The current conduction means system (25, 35) has three electrical conductors (27.1, 27.2, 27.3; 37.1, 37.2, 37.3; 45.1, 45.2, 45.3) arranged next to one another. A housing (26, 36, 46) is connected to the inner tower wall at predetermined distances using connecting devices which have electrical cross-sections conducting with the tower wall. The distances between the connecting devices in the longitudinal extent of the tower (11) and the cross-sections of the connecting devices between the housing (26, 36, 46) and the tower wall are dimensioned such that during a fault, the voltage drop between the tower wall and the housing (26, 36, 46) does not exceed a predetermined touch voltage.

Abstract: An arrangement of components (12, 13, 30) for a wind power plant. A first component (12, 13) has a flange (15, 130) having a flange contact surface (121, 122, 133). A second component (30) has a flange-mounting surface (131, 132) for a flange (15, 130) of the first component (12, 13). Alternatively, the second component (12, 13) has a flange (15, 130) having a flange contact surface (122, 133) and the flange contact surface (122, 133) of the first component (12, 13) and the flange-mounting surface (131, 132) of the second component (30) are arranged opposite each other, or the flange contact surfaces (122, 121) of the components are arranged opposite each other. At least one flange contact surface (121, 122, 133) of a flange (15, 130) and/or the flange-mounting surface (131, 132) of the second component (30) has an outer coating made of a chrome-steel alloy.

Abstract: A method for operating a wind turbine (10). The wind turbine (10) is operated with variable rotational speed between predeterminable minimum and maximum rotational speeds. A characteristic variable (51) of an oscillation of the wind turbine (10) is detected. The wind turbine (10) includes a tower (14) and a rotor (13). An open-loop or closed-loop control device (36, 50) provides open-loop control or closed-loop control of the rotational speed of the rotor (13) between a minimum rotational speed and a maximum rotational speed during a power-supplying operation of the wind turbine. A sensor (40) detects a characteristic variable (51) of an oscillation of the wind turbine (10) and the minimum rotational speed is changed depending on the characteristic value (51) of the oscillation. The minimum rotational speed is altered depending on the characteristic variable (51) of the oscillation by the open-loop or closed-loop control device (36, 50).

Abstract: The invention relates to a wind power plant having a main controller. A set of condition parameters is fed to the main controller. The main controller determines settings for the operation of the wind power plant from the condition parameters. According to the invention, a minimal controller and a monitoring module are further provided. The minimal controller determines a setting for the pitch angle and/or pitch speed from a subset of the condition parameters. In the event of an error in the processing of the main controller, the monitoring module transfers the control over the wind power plant to the minimal controller. The invention further relates to a method for operating such a wind power plant. The wind power plant can be shut down in a controlled manner by means of the minimal controller according to the invention if an error occurs in the main controller.

Abstract: A fastening element (12) for arrangement in a receptacle of a rotor blade connection (17) of a rotor blade (5). The receptacle is formed on the rotor hub-side end of the, preferably flange-free, rotor blade (5). The fastening element (12) is arranged in the receptacle between an inner fastening side and an outer fastening side of the rotor blade (5) and the fastening element (12) introduced into the receptacle (10) is connected to the inner fastening side and the outer fastening side of the rotor blade (5). The fastening element (12) is formed tapered in the longitudinal extension thereof. The fastening element (12) has a connector (15) transverse, particularly perpendicular, to the longitudinal extension for a lightning protection conductor (18) of the rotor blade (5).

Abstract: A method for operating a wind farm and to a wind farm is disclosed. When a wind farm and the wind energy installations involve target values for the reactive power being prescribed by a farm regulatory device, said target values for the reactive power ignored by the control units when controlling the respective wind energy installation in the event of a power supply system fault in the power supply system. Only when the power supply system fault has been rectified are said target values considered by the control units again for controlling the respective wind energy installation.

Abstract: A gear mechanism (22) of a wind power plant (10) that includes at least one planetary stage (24.1, 24.2) that has at least one planet gear carrier (41, 61) and a method for dismantling a multi-stage gear mechanism (22) of a wind power plant (10). The gear mechanism (22) is arranged in a nacelle (15) arranged on a tower (11) of a wind power plant (10). The gear mechanism (22) has at least one planetary stage (24.1, 24.2), and the at least one planetary stage (24.1, 24.2) has a planet gear carrier (41, 61) and several planet gears (45, 65) held in the planet gear carrier (41, 61) using planetary bolts (47, 67). The planet gears (45, 65) are in operative connection with a ring gear (49, 69) of the planetary stage (24.1, 24.2) surrounding the planet gears (45, 65).

Abstract: The present invention provides an apparatus for the controlled rotation of a nacelle of a wind turbine, which includes a control device and n of yaw brakes. In standstill operation, the n yaw brakes are actuated to impart a standstill holding moment M1 for holding the nacelle, and the n yaw brakes impart a substantially equal first holding moment. In tracking operation, the n yaw brakes are actuated to impart a tracking holding moment, M2, which is lower than the standstill holding moment M1 (M1>M2). The control device, in tracking operation, actuates a number m of the n yaw brakes to generate substantially the same constant holding moment M3, where M1/n>M3>M2/n, and where the other (n?m) yaw brakes are actuated to generate substantially the same constant holding moment M4, where m*M3+(n?m)*M4˜=M2, and M1/n>M2/n>M4.

Abstract: A bulkhead (22) of a wind turbine (10) to be arranged on a rotor blade connection of a rotor blade (14), especially on a rotor hub (9). The bulkhead (22) has a core body (30). A layer (31, 32) of fiberglass-reinforced plastic (31, 32) is arranged on the core body (30) on both sides respectively and a metal layer body (33) is arranged on one side of the layer of fiberglass-reinforced plastic (31). A method for producing a bulkhead (22) of a wind turbine (9), which is arranged on a rotor blade connection of a rotor blade (14) and a use of a bulkhead (22) of a wind turbine (10).

Abstract: A hydraulic actuation device (1) for a brake device of a wind turbine including a hydraulic control line (10), which runs from a hydraulic system circuit (P) of a wind turbine to at least one brake cylinder (2) of a brake device. At least one restrictor (13) is arranged in the control line (10). At least one branch line (14) includes a pressure regulating member (15) that branches off from the control line (10) upstream of the restrictor (13) in the pressure build-up direction, bypassing the restrictor (13), and leads back into the control line (10) downstream of the restrictor (13). The pressure regulating member (15) open when the pressure present on the output side is low, but closes when the pressure at the pressure regulating member (15) on the output side of the pressure regulating member (15) exceeds a preset closing pressure (PS).

Abstract: A rotor blade (10) of a wind power plant having a first and a second duct (16, 17) running inside the rotor blade (10) for conducting an air flow (21, 22) is provided. A method for de-icing a rotor blade (10) of a wind power plant is also provided. The rotor blade has a partition device (15) which separates the ducts (16, 17) from one another, such that the first duct (16) is arranged on a first side of the partition device (15) at the pressure side (26) of the rotor blade (10), and the second duct (17) is arranged on a second side of the partition device (15) at the suction side (25) of the rotor blade (10). In the method, the flow speed of the air flow provided in the first and second duct (16, 17) is predefined at least in portions of the rotor blade (10).

Abstract: The disclosure relates to checking a rotational speed relay of a wind turbine. The wind turbine comprises a rotational speed sensor for the rotational speed of a shaft. The rotational speed sensor outputs a rotational speed signal, which is fed to a signal input of the rotational speed relay. According to disclosure, the rotational speed signal fed to the rotational speed relay is first inactivated. Then a signal generator is activated, which produces a check signal equivalent to the rotational speed signal. The check signal is fed to the signal input of the rotational speed relay. The signal generator is operated with a check signal that is beyond a rotational speed limit, and a check is performed to determine if the rotational speed relay generates a switch-off command. This allows the functional capability of the rotational speed relay to be checked reliably and at low cost.

Abstract: A wind power plant tower having a multiplicity of tower segments which are arranged one on top of the other and enclose an interior tower space, and at least two system components from the group of a conductor, a lighting and a climbing device for operating personnel arranged in the tower inner space. Segments for the system components are structurally combined with a beam to form a separate supply module spanning a number of tower segments. The laborious assembly of the system components can thus be carried out at ground level, and only the supply module thus completed, which spans a number of segments, is then mounted in the tower. This obviates the need for a considerable amount of work in the form of hazardous working in the tower.

Abstract: A method for operating a wind energy installation (10) with a rotor (12) and at least one rotor blade (14), which can be adjusted in terms of its angle of attack. The rotor blade (14) is accelerated by virtue of at least five repeated adjustment operations of the angle of attack about its longitudinal axis (15), wherein a rotor blade bending vibration with a vibration amplitude and a vibration frequency is excited.