SGRE-Association

It is described a method of determining rotor position related information of an electrical machine (6), the method comprising: at a first rotor position, performing a HFI-method to obtain a first measurement signal set (16); at a second rotor position, performing a HFI-method to obtain a second measurement signal set (17); and deriving a corrected rotor position (θ_real1, θ_real2) and/or a rotor position error (err_6f) based on the first measurement signal set (16) and the second measurement signal set (17).

The invention describes a cable pulling arrangement (1) for use in the installation of power cables (5) in a wind turbine tower (2), comprising a transport unit (11) adapted to transport a winch assembly (12) between levels (22, 28) of the tower (2); a docking assembly (14) adapted to dock the transport unit (11) to the tower (2); and a cable guide (13) adapted to guide a winch wire (122) between levels (22, 28) of the tower (2) during a cable pulling procedure. The invention further describes a method of performing a cable pulling procedure using such a cable pulling arrangement (1).

Stabilization assembly (1) for stabilizing a load (L) suspended from a crane hook (32) of a service crane (3) during vertical displacement of the load (L) between an upper position (P1) and a lower position (P0), comprising a tagline arrangement comprising a tagline (11, 11A, 11B) adapted for connection to the crane hook (32) and a tagline winch (10, 10A, 10B) arranged at a lateral offset from the lower position (P0); and a control arrangement (12) configured to determine a lateral force (F<w>) acting on the load (L) during vertical displacement of the load (L), to compute a tagline tension (F<11>, F<11A>, F<11B>) on the basis of the determined lateral force (F<w>), and to control a tagline winch (10, 10A, 10B) accordingly.

The present invention relates to a system (100) for handling a power cable (60) of a wind turbine comprising a cable support arrangement (20) adapted to support a portion of the power cable (60) and at least one guiding arrangement (10) being fixedly connectable or connected to at least one structure (51) within a wind turbine tower (50) and adapted to guide the cable support arrangement (20) along a linear track (12) provided by at least one guide rail (11). Furthermore, a wind turbine comprising the system (100) is disclosed.The disclosed system (100) for handling a power cable (60) is advantageous for improved operational safety, requires less installation space within the wind turbine tower (50) and provides improved operational flexibility.

A method of controlling the operation of a wind turbine is provided. The wind turbine (100) comprises a wind turbine rotor (120) with one or more rotor blades (121, 122, 123) and a control system (10) that operates at least one load reduction pitch control function (40) configured to adjust a blade pitch angle to reduce a blade load. The method comprises monitoring an operating parameter of the wind turbine (100), generating, by the load reduction pitch control function (40), a pitch adjustment output (62) based on the monitored operating parameter (61), and determining, based on the monitored operating parameter (61) and/or the pitch adjustment output (62), if a predetermined criterion is fulfilled. If the predetermined criterion is fulfilled, a power output of the wind turbine (100) and/or a rotational speed of the rotor (120) of the wind turbine (100) is curtailed.

A method of controlling the operation of a wind turbine is provided. The wind turbine (100) comprises a wind turbine rotor (120) with one or more rotor blades and a control system (10) that operates at least one load reduction pitch control function (40, 50) configured to adjust a blade pitch angle to reduce a blade load. The method comprises monitoring an operating parameter of the wind turbine (100) using a blade load signal; generating, by the load reduction pitch control function (40, 50), a pitch adjustment output based on the monitored operating parameter; and determining if the operating parameter and/or the pitch adjustment output fulfills a predetermined criterion. If the predetermined criterion is fulfilled, an actual pitch adjustment is applied to one or more of the rotor blades (121, 122, 123). The operating parameter and/or the pitch adjustment output is further filtered by a filter (43, 53) having a low pass response.

It is provided a method of exciting a vibration (14, 27, 28) of a wind turbine (1) having a wind turbine generator (3) including a rotor, in particular during an operation mode different from a power production mode, the method comprising, in particular in a repeated manner: monitoring an actual characteristic (17), in particular including magnitude and/or phase and/or frequency, of the vibration (14, 27, 28); determining a torque reference (21, Tref) based at least on a desired characteristic (29) of the vibration, the torque reference being suitable for exciting the vibration; generating a torque by the generator (3) according to the torque reference (21, Tref) for exciting the vibration (14, 27, 28).

It is described a method of damping a vibration (15) of one or more rotor blades (5) of a wind turbine (1), the rotor blades being coupled to a rotor (3a) of a wind turbine generator (3), during an operation mode different from a power production mode, the vibration in particular including an edgewise vibration (14) out of a rotor plane (15), the method comprising: monitoring a characteristic (17), in particular including magnitude and/or phase and/or frequency, of the vibration (14); determining a torque reference (21, Tref) based on the characteristic of the vibration which is suitable for damping the vibration; generating a torque by the generator (3) according to the torque reference (21, Tref).

The present invention relates to a method for manufacturing a leading edge protection device (1) for a leading edge (2) of a wind turbine rotor blade (3). The method comprises providing a thermoplastic polyurethane material (4), processing the thermoplastic polyurethane material (4) by providing heat to the thermoplastic polyurethane material (4) and bringing the thermoplastic polyurethane material (4) into a predetermined shape to form the leading edge protection device (1) and further processing the leading edge protection device (1) by a surface treatment. The invention also relates to a method for manufacturing a wind turbine rotor blade (3) with a reinforced leading edge (2) and to a wind turbine rotor blade (3).

The present invention relates to an application device (1) for applying a release agent to an inner surface (2) of a mold (3) for casting a wind turbine rotor blade, comprising an application module (4) for applying the release agent to the inner surface (2) of the mold (3). The application device (1) comprises a transport module (5) for moving the application device (1) along the mold (3) and a positioning module (6) arranged at the transport module (5) for holding the application module (4) and for positioning the application module (4) relatively to the mold (3).