摘要:
A method for controlling a wind turbine, comprising a rotor and at least one rotor blade, and a corresponding control unit are disclosed. The method is characterised in adjusting a pitch angle ¸ of the rotor blade and determining the limit of an input value based on the adjusted pitch angle ¸, wherein the input value comprises information about the turbine rotational speed.
摘要:
A method is proposed for operating a wind turbine, wherein - an inflow power (342) to the wind turbine is determined, - a pitch angle (354, 384) of at least one rotor blade of the wind turbine is derived based on the inflow power (342). Further, a wind turbine, a control device, a computer program product and a computer readable medium are suggested.
摘要:
It is described a method and a control device (160) for damping an oscillatory movement of the top of a tower (120) of a wind turbine (100). The described method comprises (a) rotating a rotor (110) being rotatably attached to a nacelle (122) of the wind turbine (100) with a rotational speed, and (b) yawing the nacelle (122) of the wind turbine (100) around an axis being aligned with the longitudinal axis of the tower (120) with a yawing speed. Thereby, a yawing movement being associated with yawing the nacelle (122) is coordinated with the oscillatory movement in such a manner that a gyroscopic torque resulting (i) from rotating the rotor (110) and (ii) from yawing the rotor (110) damps the oscillatory movement of the top of the tower (120). It is further described a wind turbine comprising such a control device and a computer program for controlling this method.
摘要:
The invention provides a stall sensor for a wind turbine, a wind turbine comprising such a stall sensor and a method of operating such a wind turbine. The stall sensor comprises detector means (10) adapted to measure vibration of a rotor blade of the wind turbine and to output a vibration signal representative of the vibration of the rotor blade, conversion means (11) connected to the detector means (10) and adapted to determine a noise figure representative of a spectral signal content within a frequency band of the vibration signal received from the detector means (10) and arbiter means (12) connected to the conversion means (11) and adapted to signal a presence or an absence of stall based on the noise figure received from the conversion means (11).
摘要:
It is described a method for controlling a generator (115) having a rotor (104) with plural magnets (106) and at least a first stator winding (163) and a second stator winding (165), electrically separate from the first stator winding, the rotor being adapted to rotate, around a rotation axis (160) perpendicular to a radial direction (164), relative to the stator windings, the method comprising: allowing flow of a first electric current (154) through the first stator winding (163), thereby generating a first radial force (167) having a first magnitude and acting between the first stator winding (163) and the rotor (104); allowing flow of a second electric current (156) through the second stator winding (165), thereby generating a second radial force (169) having a second magnitude and acting between the second stator winding (165) and the rotor (104), wherein the first magnitude is different from the second magnitude resulting in a net generator generated radial force (170) generated by the first stator winding and the second stator winding at the rotor.
摘要:
It is described a method for controlling a generator (115) having a rotor (104) with plural magnets (106) and at least a first stator winding (163) and a second stator winding (165), electrically separate from the first stator winding, the rotor being adapted to rotate, around a rotation axis (160) perpendicular to a radial direction (164), relative to the stator windings, the method comprising: allowing flow of a first electric current (154) through the first stator winding (163), thereby generating a first radial force (167) having a first magnitude and acting between the first stator winding (163) and the rotor (104); allowing flow of a second electric current (156) through the second stator winding (165), thereby generating a second radial force (169) having a second magnitude and acting between the second stator winding (165) and the rotor (104), wherein the first magnitude is different from the second magnitude resulting in a net generator generated radial force (170) generated by the first stator winding and the second stator winding at the rotor.
摘要:
It is described a method and a computing module for determining pitch angle adjustment signals for adjusting a pitch angle of a rotor blade connected to a rotation shaft of a wind turbine, the method comprising: obtaining a first maximal speed signal (ms1) indicative of a first desired maximal rotational speed (ms1) of the rotation shaft; deriving a first pitch angle ( β 1) adjustment signal (s β 1) based on the first maximal speed signal; obtaining a second maximal speed signal indicative of a second desired maximal rotational speed of the rotation shaft different from, in particular smaller than, the first desired maximal rotational speed of the rotation shaft; deriving a second pitch angle ( β 2) adjustment signal (s β 2) based on the second maximal speed signal, wherein the second pitch angle adjustment signal is different from the first pitch angle adjustment signal. Further an adjustment method and arrangement are described.