摘要:
The invention relates to a wind turbine (100) comprising: -a wind turbine tower (2); -a nacelle (4) pivotally mounted on top of said wind turbine tower (2); -a primary rotor (6) comprising two or more primary rotor blades (8, 8', 8'') arranged on a primary rotor axle (10); -an energy converter (12) for converting mechanical rotational energy of said primary rotor (6) into another energy form; -a yaw controlling mechanism (200); -wherein said primary rotor axle (10) is being rotably arranged in said nacelle (4); characterized in that said yaw controlling mechanism (200) is being coupled to said nacelle (4) and is comprising: -a wind vane (14) configured for being able to pivot around a wind vane pivot axis (16), thereby defining a wind vane direction (18) of said wind vane; -a secondary rotor (20) comprising two or more secondary rotor blades (22, 22', 22'', 22''') connected to a secondary rotor axle (24); -a clutching mechanism (26); wherein said wind vane (14) and said secondary rotor axle (24) are mechanically coupled to said clutching mechanism (26) in such a way that said wind vane (14) may engage or disengage said clutching mechanism (26).
摘要:
The invention relates to a method of controlling a wind turbine comprising a wind direction sensor, a number of pitch-adjustable rotor blades, a yawing system, and a control system for yawing the wind turbine rotor relative to the wind and for changing the pitch of the rotor blades. The method comprises measuring a wind direction parameter by the wind direction sensor, wherein the wind direction parameter is indicative of the wind direction relative to the wind turbine. Then firstly the measured relative wind direction is calibrated as a function of a predetermined offset parameter, and secondly the calibrated relative wind direction is adjusted as a function of a wind direction compensation parameter, wherein the wind direction compensation parameter depends on the calibrated relative wind direction. The adjusted relative wind direction is then used in the determining of a control parameter of the wind turbine. The parameters for the calibration and adjustment of the relative wind direction are obtained from a set of data comprising the wind direction relative to the wind turbine over time and as measured by the wind direction sensor on the wind turbine and as measured by a second wind direction sensor. The invention further relates to a control system for a wind turbine for performing a control method as mentioned above.
摘要:
Die Erfindung betrifft ein Verfahren zum Bestimmen eines Azimutwinkels einer Windenergieanlage (100), mit den Schritten Anbringen von mindestens zwei GNSS- Empfängern (300) an einer Gondel (104), Vergleichen der Empfangssignale der GNSS- Empfänger, Ableiten des Azimutwinkels aus dem Vergleichsergebnis, wobei die mindestens zwei GNSS-Empfänger an einem Windmesstraggestell angebracht werden; ein Verfahren mit den Schritten Anbringen eines Zielfernrohrs (700) an einer Gondel, Anpeilen eines Peilobjekts (710) mit dem Zielfernrohr in einem Peilwinkel (ß), Ableiten des Azimutwinkels aus einem Abgleich des Peilwinkels (ß) mit realen Koordinaten des Peilobjekts und/oder der Windenergieanlage, wobei das Zielfernrohr an einem Windmesstraggestell angebracht wird; und ein Verfahren mit den Schritten: Anbringen von einem GNSS-Empfänger an einer Gondel, Drehen der Gondel um ihre eigene Achse und Vergleichen der Empfangssignale des GNSS-Empfängers von unterschiedlichen Positionen der Drehung, Ableiten des Azimutwinkels aus dem Vergleichsergebnis, wobei der mindestens eine GNSS-Empfänger, an einem Windmesstraggestell angebracht wird. Die Erfindung betrifft ferner eine Windenergieanlage.
摘要:
Techniques are disclosed for actively determining a yaw misalignment value for a wind turbine based in part on identifying the position of a tower shadow effect that occurs the moment a blade passes in front of the wind turbine tower. The present disclosure has identified that when a wind turbine is properly aligned with the wind, tower shadowing occurs the moment when a blade is substantially in front of the tower (e.g., 6 o'clock position). A wind turbine control system consistent with the present disclosure correlates incidences of tower shadowing effect with blade position at the moment the tower shadowing occurs, and therefore may identify whether tower shadowing occurs substantially directly in front of the tower, and thus, the wind turbine is properly aligned with oncoming wind, or whether tower shadowing occurs prior to or after passing through the front of the tower, thus indicating a yaw misalignment.
摘要:
A sensor system for a wind turbine blade, the system comprising: a blade load sensor providing a load measurement; a processing unit interfaced with the blade load sensor and configured to provide a corrected load parameter as an output. The processing unit includes: an axial force estimation module that determines an estimated axial force on the wind turbine blade in a direction along the length of the blade; and a load calculation module that 10 determines the corrected load parameter based on the estimated axial force and the load measurement of the blade load sensor.
摘要:
Es wird ein Verfahren zum Betreiben einer Windenergieanlage (100) vorgestellt, das einen Schritt des Ermitteins einer Windrichtung (122) unter Verwendung zumindest einer Rotorblattbiegeinformation (1 18) umfasst, wobei die Rotorblattbiegeinformation (118) eine Blattbiegung (120) eines Rotorblatts (106) eines Rotors (104) der Windenergieanlage (100) repräsentiert.
摘要:
A control method and apparatus for safe mode operation at high yaw error is described. A yaw error detection block (2) detects a yaw error. A load-reducing controller (4), for mitigating one or more structural loads associated with the yaw error, operates when a yaw error is detected, to engage a safe mode in which it operates to prevent the pitch angle applied to the individual wind turbine blades from falling below a minimum non-zero value.
摘要:
A wind turbine (1) in which the yaw speed of a rotor (4) of the wind turbine (1) is increased, in a direction to reduce yaw error, from a first speed to a faster second speed when at least one of a yaw error threshold and a rate of change in yaw error threshold is exceeded. Yaw error is an amount an axis about which the rotor (4) is rotatable is offset from the wind direction to which the rotor (4) is exposed. As a result, the maximum loads that a wind turbine 1 should withstand may be reduced and lighter wind turbine components result.
摘要:
A system and a method for controlling operation of an underwater power generator is described, as well as computing componentry for controlling the operation of the underwater power generator. The system comprises: meters for measuring selected properties associated with blade speed and inward water flow of the underwater power generator; a drive for altering one or more selected aspects of operation of the underwater power generator; and a data processing apparatus comprising a central processing unit (CPU), a memory operatively connected to the CPU, the memory containing a program adapted to be executed by the CPU, wherein the CPU and/or memory are operatively adapted to receive information from the meters to calculate a Tip Speed Ratio (TSR or λ) and implement an instruction to the drive to change the one or more selected operating parameters of the underwater power generator in response to the calculated TSR or λ.