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WINDSCANNER.DK: LIDAR WIND SPEED MEASUREMENTS FROM A ROTATING SPINNER T. Mikkelsen, K. Hansen, N. Angelou, M. Sjöholm, M. Harris, P. Hadley, R. Scullion,

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Presentation on theme: "WINDSCANNER.DK: LIDAR WIND SPEED MEASUREMENTS FROM A ROTATING SPINNER T. Mikkelsen, K. Hansen, N. Angelou, M. Sjöholm, M. Harris, P. Hadley, R. Scullion,"— Presentation transcript:

1 WINDSCANNER.DK: LIDAR WIND SPEED MEASUREMENTS FROM A ROTATING SPINNER T. Mikkelsen, K. Hansen, N. Angelou, M. Sjöholm, M. Harris, P. Hadley, R. Scullion, G. Ellis, G. Vives Risø DTU, Roskilde, Denmark Natural Power, Malvern, UK

2 2Risø DTU, Technical University of Denmark WindScanner.dk From new Wind Lidar Technology towards new Wind Energy Research Infrastructures…: Technical focus Scientific focus RI focus Current Status EU ESFRI Road Map 2010 ? First CW Wind lidar 2004 MusketeerEX 2007/2008 SpinnerEX 2009 WindScanner. dk

3 3Risø DTU, Technical University of Denmark WindScanner.dk methodology is based on 3-dimensional scanning with wind lidar's to determine the instantaneous turbulence fields: Since 2005 new wind lidar's have enabled replacement of tall ( m) MET masts

4 4Risø DTU, Technical University of Denmark

5 5 Ø H 25 kW Wind Turbine 1975: Ø/H ~ MW NM80 Height 59 m; Ø=80H <Ø/H ~ 1.4

6 6Risø DTU, Technical University of Denmark Spinner Integrated Lidar I: Experimental Setup: Pro-active wind turbine control from upwind measurements by lidars integrated in the rotating Spinner… :

7 7Risø DTU, Technical University of Denmark Tjæreborg SPINNER-EX 2009 Tjæreborg SPINNER-EX 2009 Spinner – mounted lidar CW Lidar: ZephIR (50 Hz) Wind Turbine: NM80 (NegMicon/Vestas) Wind Turbine: NM80 (NegMicon/Vestas)

8 8Risø DTU, Technical University of Denmark Tjæreborg: ZephIR “Spinner-Ex.” …:

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11 11Risø DTU, Technical University of Denmark Real-time LIDAR Raw data (50 Hz un-calibrated):

12 12Risø DTU, Technical University of Denmark Time series (10 s) of approaching wind conditions measured +100 m upwind: Ex.: Inhomogeneous wind field

13 13Risø DTU, Technical University of Denmark Spinner Integrated Lidar II: Measurements and Results Pro-active wind turbine control from upwind measurements by lidar's integrated in the rotating Spinner… :

14 14Risø DTU, Technical University of Denmark Measurement Setup’s: Wind speed values per rotation (each frame contains 10 consecutive scanning circles)

15 15Risø DTU, Technical University of Denmark The loci of the focussed lidar beam Radial wind speeds during a 10-min sampling period 1.24 Ø (+ 100 m):

16 16Risø DTU, Technical University of Denmark Geometry Radial Wind Speeds – Wind Turbine-referenced: Horizontal Wind Speeds – ground-referenced:

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29 29Risø DTU, Technical University of Denmark Results Correlation between lidar and mast Study of the approaching wind field

30 30Risø DTU, Technical University of Denmark Wind turbine Yaw-misalignment relative to time-averaged wind direction as measured by lidar: Yaw misalignment angles at hub height (57m) Direction [degrees] Time [HH:MM] Time [sec] Θ w [degrees]

31 31Risø DTU, Technical University of Denmark 10-min averages Power curve measurements based on Spinner Lidar data: Power curves from lidar wind speed 100 m (1.24 Ø) upwind Power curves based on hub-height cup anemometer 1-min averages1-s averages Power [kW] U [m/s]

32 32Risø DTU, Technical University of Denmark Spinner Integrated Lidar III: Future Work 2D Rotor Plane Scans Pro-active wind turbine control from upwind measurements by lidars integrated in the rotating Spinner… :

33 33Risø DTU, Technical University of Denmark Scanning in 2-D: ”Risley prism” Dual-prism single-axis beam steering:

34 34Risø DTU, Technical University of Denmark Scope for further wind LIDAR integration: Rotor Plane Upwind Blade integrated lidar Spinner integrated lidar

35 35Risø DTU, Technical University of Denmark Future research and applications: 1.More precise yaw alignment using lidar 2.Proactive (typically +10 s) Pitch control 3.Pro-active RPM control 4.Warning and mitigating of extreme loads (from gusts) 5.More percise power-curve measurememts 6. … Acknowledgements: The Tjæreborg “Lidar-in-spinner Experiment” was conducted as part of the Windscanner.dk RI activities Windscanner.dk Meteorology and turbine data have been provided via the Danish DAN-AERO MW project. Access to the NM80 research Turbine was granted by Vestas and Dong Energy.


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