Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines

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Resumé

Wind turbines in a wind farm, influence each other through the wind flow. Downwind turbines are in the wake of upwind turbines and the wind speed experienced at downwind turbines is hence a function of the wind speeds at upwind turbines but also the momentum extracted from the wind by the upwind turbine. This paper establishes flow models relating the wind speeds at turbines in a farm. So far, research in this area has been mainly based on first principles static models and the data driven modelling done has not included the loading of the upwind turbine and its impact on the wind speed downwind. This paper is the first where modern commercial mega watt turbines are used for data driven modelling including the upwind turbine loading by changing power reference. Obtaining the necessary data is difficult and data is therefore limited. A simple dynamic extension to the Jensen wake model is tested without much success. The best model turns out to be non linear with upwind turbine loading and wind speed as inputs. Using a transformation of these inputs it is possible to obtain a linear model and use well proven system identification methods. Finally it is shown that including the upwind wind direction to explain the wake improve the prediction performance.
OriginalsprogEngelsk
Titel16th IFAC Symposium on System Identification
Antal sider6
Vol/bind16
ForlagElsevier
Publikationsdato2012
Sider1677-1682
ISBN (Trykt)978-3-902823-06-9
DOI
StatusUdgivet - 2012
Begivenhed16th IFAC Symposium on System Identification - Brussels, Belgien
Varighed: 11 jul. 201213 aug. 2012

Konference

Konference16th IFAC Symposium on System Identification
LandBelgien
ByBrussels
Periode11/07/201213/08/2012
NavnI F A C Workshop Series
ISSN1474-6670

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Wind turbines
Data structures
Turbines
Farms
Identification (control systems)
Momentum

Emneord

    Citer dette

    Knudsen, T., & Bak, T. (2012). Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines. I 16th IFAC Symposium on System Identification (Bind 16, s. 1677-1682). Elsevier. I F A C Workshop Series https://doi.org/10.3182/20120711-3-BE-2027.00128
    Knudsen, Torben ; Bak, Thomas. / Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines. 16th IFAC Symposium on System Identification. Bind 16 Elsevier, 2012. s. 1677-1682 (I F A C Workshop Series).
    @inproceedings{8c271e5555394e21b62f903bc31009e2,
    title = "Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines",
    abstract = "Wind turbines in a wind farm, influence each other through the wind flow. Downwind turbines are in the wake of upwind turbines and the wind speed experienced at downwind turbines is hence a function of the wind speeds at upwind turbines but also the momentum extracted from the wind by the upwind turbine. This paper establishes flow models relating the wind speeds at turbines in a farm. So far, research in this area has been mainly based on first principles static models and the data driven modelling done has not included the loading of the upwind turbine and its impact on the wind speed downwind. This paper is the first where modern commercial mega watt turbines are used for data driven modelling including the upwind turbine loading by changing power reference. Obtaining the necessary data is difficult and data is therefore limited. A simple dynamic extension to the Jensen wake model is tested without much success. The best model turns out to be non linear with upwind turbine loading and wind speed as inputs. Using a transformation of these inputs it is possible to obtain a linear model and use well proven system identification methods. Finally it is shown that including the upwind wind direction to explain the wake improve the prediction performance.",
    keywords = "Multivariable System Identification, Nonlinear System Identification, Wind Energy, Turbine wakes, Wind farm modeling",
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    Knudsen, T & Bak, T 2012, Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines. i 16th IFAC Symposium on System Identification. bind 16, Elsevier, I F A C Workshop Series, s. 1677-1682, Brussels, Belgien, 11/07/2012. https://doi.org/10.3182/20120711-3-BE-2027.00128

    Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines. / Knudsen, Torben; Bak, Thomas.

    16th IFAC Symposium on System Identification. Bind 16 Elsevier, 2012. s. 1677-1682.

    Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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    Knudsen T, Bak T. Data Driven Modelling of the Dynamic Wake Between Two Wind Turbines. I 16th IFAC Symposium on System Identification. Bind 16. Elsevier. 2012. s. 1677-1682. (I F A C Workshop Series). https://doi.org/10.3182/20120711-3-BE-2027.00128