Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow

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Resumé

Wind turbines operate with sudden change in pitch angle, rotor or wind speed. In such cases the wake behind the turbine, achieve steady state conditions only after a certain delay. This phenomenon is commonly called dynamic inflow. There are many models for dynamic inflow. The most accurate use a method that can be characterised as the blade element momentum method plus a dynamic equation for the induction factor. This method then needs calculations along the blade for a number of sections including numerical solution of equations. This is numerical demanding. The simplest models amounts to placing a lead-lag filter after rotor torque and thrust calculated from static tables of the power and thrust coefficients. The filter constants will then vary with average wind speed. The filtered versions of torque and thrust are then an approximate modelling of the dynamic inflow. The dynamic inflow model suggested here places itself in between the most complex and the most simple both in accuracy, numerical demands and physical appeal. The suggested models behavior is demonstrated by simulation and the usefulness for extended Kalman filtering is assessed both via simulated data and real full scale turbine data.
OriginalsprogEngelsk
TitelAmerican Control Conference (ACC), 2013
Antal sider7
ForlagIEEE
Publikationsdato17 jun. 2013
Sider640-646
ISBN (Elektronisk)978-1-4799-0177-7
StatusUdgivet - 17 jun. 2013
Begivenhed The 2013 American Control Conference - Washington, USA
Varighed: 17 jun. 201319 jun. 2013

Konference

Konference The 2013 American Control Conference
LandUSA
ByWashington
Periode17/06/201319/06/2013
NavnProceedings of the American Control Conference
ISSN0743-1619

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Wind turbines
Turbines
Torque
Rotors
Dynamic models
Momentum
Lead

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    Knudsen, T., & Bak, T. (2013). Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow. I American Control Conference (ACC), 2013 (s. 640-646). IEEE. Proceedings of the American Control Conference
    Knudsen, Torben ; Bak, Thomas. / Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow. American Control Conference (ACC), 2013 . IEEE, 2013. s. 640-646 (Proceedings of the American Control Conference).
    @inproceedings{8e9219856f4849ac88a83630ff0beccd,
    title = "Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow",
    abstract = "Wind turbines operate with sudden change in pitch angle, rotor or wind speed. In such cases the wake behind the turbine, achieve steady state conditions only after a certain delay. This phenomenon is commonly called dynamic inflow. There are many models for dynamic inflow. The most accurate use a method that can be characterised as the blade element momentum method plus a dynamic equation for the induction factor. This method then needs calculations along the blade for a number of sections including numerical solution of equations. This is numerical demanding. The simplest models amounts to placing a lead-lag filter after rotor torque and thrust calculated from static tables of the power and thrust coefficients. The filter constants will then vary with average wind speed. The filtered versions of torque and thrust are then an approximate modelling of the dynamic inflow. The dynamic inflow model suggested here places itself in between the most complex and the most simple both in accuracy, numerical demands and physical appeal. The suggested models behavior is demonstrated by simulation and the usefulness for extended Kalman filtering is assessed both via simulated data and real full scale turbine data.",
    keywords = "Wind energy, Control of wind turbines, Dynamic inflow, Extended Kalman filter",
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    Knudsen, T & Bak, T 2013, Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow. i American Control Conference (ACC), 2013 . IEEE, Proceedings of the American Control Conference, s. 640-646, Washington, USA, 17/06/2013.

    Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow. / Knudsen, Torben; Bak, Thomas.

    American Control Conference (ACC), 2013 . IEEE, 2013. s. 640-646.

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

    TY - GEN

    T1 - Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow

    AU - Knudsen, Torben

    AU - Bak, Thomas

    PY - 2013/6/17

    Y1 - 2013/6/17

    N2 - Wind turbines operate with sudden change in pitch angle, rotor or wind speed. In such cases the wake behind the turbine, achieve steady state conditions only after a certain delay. This phenomenon is commonly called dynamic inflow. There are many models for dynamic inflow. The most accurate use a method that can be characterised as the blade element momentum method plus a dynamic equation for the induction factor. This method then needs calculations along the blade for a number of sections including numerical solution of equations. This is numerical demanding. The simplest models amounts to placing a lead-lag filter after rotor torque and thrust calculated from static tables of the power and thrust coefficients. The filter constants will then vary with average wind speed. The filtered versions of torque and thrust are then an approximate modelling of the dynamic inflow. The dynamic inflow model suggested here places itself in between the most complex and the most simple both in accuracy, numerical demands and physical appeal. The suggested models behavior is demonstrated by simulation and the usefulness for extended Kalman filtering is assessed both via simulated data and real full scale turbine data.

    AB - Wind turbines operate with sudden change in pitch angle, rotor or wind speed. In such cases the wake behind the turbine, achieve steady state conditions only after a certain delay. This phenomenon is commonly called dynamic inflow. There are many models for dynamic inflow. The most accurate use a method that can be characterised as the blade element momentum method plus a dynamic equation for the induction factor. This method then needs calculations along the blade for a number of sections including numerical solution of equations. This is numerical demanding. The simplest models amounts to placing a lead-lag filter after rotor torque and thrust calculated from static tables of the power and thrust coefficients. The filter constants will then vary with average wind speed. The filtered versions of torque and thrust are then an approximate modelling of the dynamic inflow. The dynamic inflow model suggested here places itself in between the most complex and the most simple both in accuracy, numerical demands and physical appeal. The suggested models behavior is demonstrated by simulation and the usefulness for extended Kalman filtering is assessed both via simulated data and real full scale turbine data.

    KW - Wind energy

    KW - Control of wind turbines

    KW - Dynamic inflow

    KW - Extended Kalman filter

    M3 - Article in proceeding

    SP - 640

    EP - 646

    BT - American Control Conference (ACC), 2013

    PB - IEEE

    ER -

    Knudsen T, Bak T. Simple Model for Describing and Estimating Wind Turbine Dynamic Inflow. I American Control Conference (ACC), 2013 . IEEE. 2013. s. 640-646. (Proceedings of the American Control Conference).