Abstract: The invention relates to a method for pitch angle measurement and/or for constructing a pitch angle measurement system on a rotor blade (100) of a wind turbine, the rotor blade comprising a blade root (114) and extending along a longitudinal blade axis (180). The rotor blade is rotatably mounted, by its blade root (114), to rotate about the longitudinal blade axis (180), on a rotor hub (20) of the wind turbine, the rotor hub rotating or being rotatable about a rotor axis (36). At least one chord line direction indicator (430) is firmly connected to the rotor blade (100) at a distance from the blade root (114), and defines a chord line direction indicator direction (160) indicative of a direction of a chord line (140) of the rotor blade (100) at the location of the chord line direction indicator (430).

Abstract: A method is disclosed for estimating the surface condition of a blade rotating about a rotational axis in an air or fluid stream.

Abstract: The invention relates to a switchgear cabinet for a wind power plant, having a U-shaped base plate, comprising a bottom and two side parts, two end plates connected to the base plate, and a cover, by means of which the switchgear cabinet is closed, wherein the end plates are lengthened beyond the side parts or longitudinal sides formed by the latter, or the end plates are each set back at a distance with respect to an outer edge of the base plate, such that the base plate and/or the end plates form tabs projecting outward, which are useful for the fixing of holders.

Abstract: Method for controlling a rotor blade adjustment device (14) of a wind turbine or water hydroelectric powerplant (1), wherein the rotor blade adjustment device (14) has a drive (20) which is connected to a rotor blade (8) which is subjected to a flow of wind or water and has the purpose of rotating the rotor blade (8) about a rotor blade axis (15) relative to a rotor hub (7) on which the rotor blade (8) is mounted so as to be rotatable about the rotor blade axis (15), and an electromagnetic brake (34) which is connected to the rotor blade (8) and has the purpose of blocking rotation of the rotor blade (8) about the rotor blade axis (15), wherein the brake (34) is actuated in order to change its activation state at a brake activation time (tB), wherein the drive (20) is actuated to change its driving state at a drive activation time (tA) which has a predetermined chronological offset (?tv) with respect to the brake activation time (tB), and wherein an electric current (IB) which flows through the brake (34) is

Abstract: The invention relates to a wind turbine having at least one measuring device for measuring deformations of an elongated component of the wind turbine, such as a tower or a rotor blade. The measuring device is part of a transmitting/receiving device with a remotely arranged reflector device, is mounted in a bracket, and has adjusting devices for precise adjustment and alignment of the measuring device relative to the bracket. The adjusting device has a cam rotation device at the bearing point of the adjusting device. The cam rotation device has, at every bearing point, a cam disc with an adjusting wheel, at least one ball disc with an associated ball socket and a clamping screw. The invention also relates to a method for adjusting and aligning a measuring device of the wind turbine, wherein the measuring device is aligned in the horizontal and vertical direction by rotating the cam rotation device.

Abstract: The present invention relates to a wind turbine and a measuring system for determining the pitch angle of at least one blade relative to a hub of a wind turbine.

Abstract: The invention relates to a wind turbine comprising a rotor hub (7) rotating about a rotor axis (8), rotor blades (9, 10, 11) extending radially with respect to the rotor axis (8) at the same angular spacing relative to one another, and a remote wind gauge (19) that is fastened externally on the surface of the hub (7) in a mounting (20) and oriented such that wind characteristics at a distance in front of the hub (7) can be ascertained or measured, wherein the remote wind gauge (19) is arranged between two neighbouring rotor blades (9, 10) and in the radial direction of the rotor axis (8) and the mounting (20) is fastened to a respective blade bearing flange (21, 22) in the region of the connection of the rotor hub (7) to the rotor blades (9, 10), such that the remote wind gauge (19) can be retrofitted to the wind turbine (1).

Abstract: The invention relates to a safety system for a wind turbine, comprising a pitch system (23), which comprises a plurality of drive systems (15, 16, 17) and at least one safety switching device (24), by means of which each of the drive systems (15, 16, 17) can be controlled to carry out a travel to a safe position in accordance with at least one control signal, a safety circuit, which is provided in a machine part adjacent to the pitch system (23) and which comprises a transmission device (32) and a controller (29), by means of which the at least one control signal can be generated, which can be transmitted from the controller (29) to the safety switching device (24) by means of the transmission device (32), wherein the control signal can be generated and/or output by the controller (29) in the form of at least two control signals (EFC 1, EFC 2), the control signals (EFC 1, EFC 2) can be transmitted from the controller (29) to the safety switching device (24) by means of the transmission device (32), a safety-r

Abstract: A sensor device for measuring aerodynamic loads of a rotor blade for a wind power installation. The sensor device includes a reflector arranged in a cavity of the rotor blade which signals a signal evaluation device arranged at a distance from the reflector. The signal evaluation device detects and quantifies physical changes of the rotor blade from the reflected signal. A cleaning device for the reflector is arranged on the reflector for activation by a centrifugal force generated during the rotation of the rotor to clean the reflector.

Abstract: A box-shaped electric control cabinet is provided which can be closed by a cover and which is used to receive electric components and devices for a blade angle adjustment drive (pitch drive) of a wind energy power plant, by means of which one or more rotor blades of the plant can be rotated about the blade axis. The control cabinet includes at least two cabinet segments, and specific electric components and devices are associated with respectively each module according to its function. The cabinet segments can be associated with and/or assigned to respectively different electric components and devices, with which, combined as a part function, different total functions and/or embodiment forms of the control cabinet can be produced or are producible.

Abstract: A pitch system for a wind turbine installation having an electrically driven pitch drive associated with each rotor blade and an electric motor arranged in a rotating part of the wind turbine installation for blade adjustments. A power and control unit is associated with the motor and has line connections for the transmission of power and control data from the power and control unit to the motor and vice versa. The line connections are passed via a first rotating bushing arranged at a connecting point between the rotating part and an axially adjacent stationary region. The pitch system also includes second rotating bushing which operates mechanically and electrically separately from the first rotating bushing and is connectable to the power and control unit and to the motor for maintaining reliable transmission of the power and control data if the first rotating bushing fails.

Abstract: A method for checking an electric energy storage device for a blade angle adjustment drive of a wind turbine. The method includes blocking an electric motor, loading an electric energy storage device from the blocked electric motor by means of a converter; and observing the discharging of the electric energy storage device.

Abstract: The disclosure relates to a wind turbine having a machine support (5), a rotor (6) which can be driven by wind (13) to rotate about the rotor axis (7) and is mounted so that it can rotate on the machine support (5) about a rotor axis (7). The rotor includes a rotor hub (8) and several rotor blades (9, 10) which extend respectively in the direction of a blade axis (11, 12) running transverse or essentially transverse to the rotor axis (7). The rotor blades (9,10) are mounted so that they can rotate on the rotor hub (8) about the respective blade axis (11, 12). Blade angle adjustable drives (17, 18) are arranged on the rotor (6) and enable the rotor blades (9, 10) to rotate about the blade axes thereof (11, 12). A blade angle control device (24) is coupled to the blade angle adjusting drives (17, 18) and can control the blade angle adjusting drives (17, 18). An electric generator (15) is mechanically coupled to the rotor (6) and can be driven by the rotor to generate electric energy.

Abstract: This disclosure relates to a device for optically measuring the curvature of a rotor blade (18) of a wind power plant (1). The rotor blade is fixed at the blade root (23) to a rotor hub (8) or a rotor (6). The device includes at least one light-emitting external marking (33) fixed to the rotor blade (18) at a distance from the blade root (23), at least one camera (27) fixed to the rotor (6) for capturing the light (35) emitted from the external marking (33). The device provides first location information as a function of the relative position of the camera (27) with respect to the external marking (33). An evaluating device (37) is coupled to the camera (27), and a position detection means detects the relative location of the camera (27) with respect to the blade root (23) and provides second location information as a function of said relative location. The evaluating device (37) determines at least one variable characterizing the curvature of the rotor blade (18) while evaluating the position information.

Abstract: The invention relates to a wind turbine having at least one measuring device (28) for measuring deformations of an elongated component of the wind turbine (1), such as a tower or a rotor blade. The measuring device (28) is part of a transmitting/receiving device with a remotely arranged reflector device (25), is mounted in a bracket (35), and has adjusting devices (41, 38) for precise adjustment and alignment of the measuring device (28) relative to the bracket (35). The adjusting device (41, 38) has a cam rotation device (41) at the bearing point of the adjusting device. The cam rotation device (41) has, at every bearing point, a cam disc (46) with an adjusting wheel, at least one ball disc (44) with an associated ball socket (45) and a clamping screw (43). The invention also relates to a method for adjusting and aligning a measuring device of the wind turbine (1), wherein the measuring device (28) is aligned in the horizontal and vertical direction by rotating the cam rotation device (41).

Abstract: The invention relates to a rotor for a wind turbine of the type having a rotor hub (8) and a set of rotor blades (9). Each rotor blade (9) is rotatably mounted on the rotor hub (8) for rotation about a blade axis (11). A threaded spindle mechanism (13) interconnects the rotor blade (9) and the rotor hub (8). The threaded spindle mechanism (13) includes a spindle nut (32), a threaded spindle (31) and a drive (21) mounted on the rotor blade (9) adjacent a transition between the rotor hub (8) and the rotor blade (9). The drive (21) is rotatable together with the rotor blade (9) about the blade axis (11) relative to the rotor hub (8) by actuation of the threaded spindle mechanism (13).

Abstract: The invention relates to a method for controlling a wind power plant having a rotor (5) driven by wind and rotating about a horizontal or substantially horizontally aligned rotor axis (6). The rotor includes a plurality of rotor blades (1, 2, 3), each extending in the direction of a blade axis (11, 12 13) which is perpendicular or substantially perpendicular to the rotor axis and about which the respective rotor blade (1, 2, 3) is rotated, wherein the rotor (5) is rotated about a vertical or substantially vertically aligned yaw axis (8) having a yaw angle velocity (?), whereby gyroscopic loads are generated on the rotor blades (1, 2, 3), and wherein the gyroscopic loads on the rotor blades (1, 2, 3) are reduced by rotating the rotor blades (1, 2, 3) about the blade axes (11, 12, 13) thereof depending on the yaw angle velocity (?) or a guide variable (?c) influencing said velocity.

Abstract: The invention relates to a safety system for a wind turbine, comprising a pitch system (23), which comprises a plurality of drive systems (15, 16, 17) and at least one safety switching device (24), by means of which each of the drive systems (15, 16, 17) can be controlled to carry out a travel to a safe position in accordance with at least one control signal, a safety circuit, which is provided in a machine part adjacent to the pitch system (23) and which comprises a transmission device (32) and a controller (29), by means of which the at least one control signal can be generated, which can be transmitted from the controller (29) to the safety switching device (24) by means of the transmission device (32), wherein the control signal can be generated and/or output by the controller (29) in the form of at least two control signals (EFC 1, EFC 2), the control signals (EFC 1, EFC 2) can be transmitted from the controller (29) to the safety switching device (24) by means of the transmission device (32), a safety-r

Abstract: A meteorological measurement system is disclosed having a meteorological mast which extends upwards from a base and supports one or more wind gauges. At least one of the wind gauges is disposed in the region of the upper tip of the mast and is designed as a remote wind gauge for measuring wind conditions at one or more remote measurement locations situated above the mast tip at a distance from the remote wind gauge. At least another wind gauge is disposed in the region of the upper tip of the mast in close spatial proximity to the remote wind gauge and is designed as a local wind gauge for measuring wind characteristics at the location of the remote wind gauge.

Abstract: The present invention relates to a wind-velocity-field measurement system for use in a wind turbine having a rotor with? two or more blades, comprising at least one sensor-signal obtained by measuring a physical quantity on at angle least one of the blades, the physical quantity being indicative of at least one wind-velocity-field characteristic; a table (140, 142, 144) build for a plurality of wind conditions by associating values characterizing the at least one sensor-signal with values of the at least one wind-velocity-field characteristic, and; searching means (150, 152, 154) for determining from the table a value of the at least one wind-velocity-field characteristic for a current wind condition given values characterizing the at least one sensor-signal.