WO2025056131 - INDIVIDUAL PITCH CONTROL FOR MITIGATING WHIRLING MOTION OF WIND TURBINE ROTOR BLADES
National phase entry is expected:
Publication Number
WO/2025/056131
Publication Date
20.03.2025
International Application No.
PCT/DK2024/050208
International Filing Date
10.09.2024
Title **
[English]
INDIVIDUAL PITCH CONTROL FOR MITIGATING WHIRLING MOTION OF WIND TURBINE ROTOR BLADES
[French]
COMMANDE DE PAS INDIVIDUEL PERMETTANT D'ATTÉNUER LE MOUVEMENT DE TOURBILLONNEMENT DE PALES DE ROTOR D'ÉOLIENNE
Applicants **
VESTAS WIND SYSTEMS A/S
Inventors
GILES, Alexander Duncan
THOMSEN, Jesper Sandberg
NETO, Julio Xavier Vianna
Priority Data
PA202330199
11.09.2023
DK
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
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| Number of Office Actions | * |
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International Searching Authority |
EPO
* |
| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
* |
| Type of Assignment |
The Standard Agent's Assignment
* |
| Applicant's Legal Status |
Legal Entity
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| * | |
| * | |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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* The data is based on automatic recognition. Please verify and amend if necessary.
** IP-Coster compiles data from publicly available sources. If this data includes your personal information, you can contact us to request its removal.
Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2046 | |
| EPO | Filing, Examination, Granting | 8193 | |
| Japan | Filing, Examination, Granting | 2171 | |
| South Korea | Filing, Examination, Granting | 2057 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
19,207
The term for entry into the National Phase has expired. This quotation is for informational purposes only
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Abstract[English]
The invention relates to adjusting individual pitch of wind turbine rotor blades. The invention involves obtaining an edge load signal indicative of edge loading on the individual rotor blades in a wind turbine rotor rotational frame, removing forward whirling frequency content corresponding to forward whirling motion from the edge signal, and applying a rotor azimuth-based transformation operation to obtain a backward whirling edge signal in a wind turbine rotor azimuth fixed frame. The backward whirling edge signal is split into first and second signals corresponding to disturbances at an edge frequency and at the edge frequency minus 2P, respectively. First and second control actions for mitigating backward whirling motion are applied to the first and second signals, respectively. The resulting signals are transformed back into rotor rotational frame to obtain individual pitch offset values which are then used to adjust pitch of the rotor blades.[French]
L'invention concerne l'ajustement de pas individuel des pales de rotor d'éolienne. L'invention comprend les étapes : l'obtention d'un signal de charge de bord indiquant un chargement de bord sur les pales de rotor individuelles dans un trame rotatif de rotor d'éolienne ; l'élimination d'un contenu de fréquence de tourbillonnement vers l'avant correspondant à un mouvement de tourbillonnement vers l'avant à partir du signal de bord ; et l'application d'une opération de transformation basée sur un azimut de rotor pour obtenir un signal de bord de tourbillonnement vers l'arrière dans un trame fixe d'azimut de rotor d'éolienne. Le signal de bord tourbillonnant vers l'arrière est divisé en des premier et second signaux correspondant à des perturbations à une fréquence de bord et à la fréquence de bord moins 2P, respectivement. Des première et seconde actions de commande pour atténuer un mouvement de tourbillonnement vers l'arrière sont appliquées aux premier et second signaux, respectivement. Les signaux résultants sont retransformés en trame rotatif de rotor pour obtenir des valeurs de décalage de pas individuelles qui sont ensuite utilisées pour ajuster le pas des pales de rotor.