windscanner.dk: lidar wind speed measurements from a rotating spinner
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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, G. Ellis, G. Vives Risø DTU, Roskilde, Denmark Natural Power, Malvern, UK. WindScanner.dk - PowerPoint PPT PresentationTRANSCRIPT
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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, G. Ellis, G. Vives
Risø DTU, Roskilde, Denmark Natural Power, Malvern, UK
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2 Risø DTU, Technical University of Denmark
WindScanner.dkFrom new Wind Lidar Technologytowards new Wind EnergyResearch Infrastructures…:
Technical focus
Scientific focus
RI focus
Current Status
EU ESFRIRoad Map
2010 ?
First CW Wind lidar 2004
MusketeerEX 2007/2008
SpinnerEX 2009
WindScanner.dk2010-2013
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3 Risø 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 (80-300 m) MET masts
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4 Risø DTU, Technical University of Denmark
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5 Risø DTU, Technical University of Denmark
Ø
HH
• 25 kW Wind Turbine 1975:• Ø/H ~ 0.3
• 2.3 MW NM80• Height 59 m;• Ø=80H• <Ø/H ~ 1.4
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6 Risø 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… :
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7 Risø DTU, Technical University of Denmark
Tjæreborg SPINNER-EX
2009Spinner – mounted
lidar
CW Lidar: ZephIR (50 Hz)
Wind Turbine: NM80(NegMicon/Vestas)
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8 Risø DTU, Technical University of Denmark
Tjæreborg: ZephIR “Spinner-Ex.” …:
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9 Risø DTU, Technical University of Denmark
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10 Risø DTU, Technical University of Denmark
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11 Risø DTU, Technical University of Denmark
Real-time LIDAR Raw data (50 Hz un-calibrated):
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12 Risø DTU, Technical University of Denmark
Time series (10 s) of approaching wind conditions measured +100 m upwind:
Ex.: Inhomogeneous wind field
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13 Risø DTU, Technical University of Denmark
Spinner Integrated Lidar II: Measurements and ResultsPro-active wind turbine control from upwind measurements by lidar's
integrated in the rotating Spinner… :
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14 Risø DTU, Technical University of Denmark
Measurement Setup’s:
Period Wedge DistanceApril – May 2009 15o ~1.24ØJuly – August 2009 30o ~0.58Ø
Wind speed values per rotation (each frame contains 10 consecutive
scanning circles)
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15 Risø DTU, Technical University of Denmark
The loci of the focussed lidar beamRadial wind speeds during a 10-min sampling period
Upwind @ 1.24 Ø (+ 100 m):
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16 Risø DTU, Technical University of Denmark
Geometry
Radial Wind Speeds –Wind Turbine-referenced:
Horizontal Wind Speeds –ground-referenced:
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17 Risø DTU, Technical University of Denmark
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18 Risø DTU, Technical University of Denmark
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19 Risø DTU, Technical University of Denmark
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20 Risø DTU, Technical University of Denmark
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21 Risø DTU, Technical University of Denmark
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22 Risø DTU, Technical University of Denmark
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23 Risø DTU, Technical University of Denmark
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24 Risø DTU, Technical University of Denmark
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25 Risø DTU, Technical University of Denmark
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26 Risø DTU, Technical University of Denmark
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27 Risø DTU, Technical University of Denmark
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28 Risø DTU, Technical University of Denmark
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29 Risø DTU, Technical University of Denmark
Results
Correlation between lidar and mast
Study of the approaching wind field
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30 Risø DTU, Technical University of Denmark
Wind turbine Yaw-misalignment relative to time-averaged wind direction as measured by lidar:
0 2000 4000 6000 8000 30 20 10010203040
Tim e s wDegrees 1 0m in
5m in3m in2m in1m in3 0 s e c
Yaw misalignment angles at hub height (57m)
01:10 01:30 01:50 02:10 02:30 02:50 03:10 03:300
10
20
30
40
50
Tim e HH :MM Direction
Degrees W TY AWSo n ic 5 7 m
Dire
ctio
n [d
egre
es]
Time [HH:MM]
Time [sec]
Θ w [d
egre
es]
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31 Risø DTU, Technical University of Denmark
0 2 4 6 8 100
100
200
300
400
500
600
700
u m sPo
werkW
0 2 4 6 8 100
100
200
300
400
500
600
700
u m s
PowerkW
0 2 4 6 8 100
100
200
300
400
500
600
700
u m s
PowerkW
0 2 4 6 8 100
100
200
300
400
500
600
700
u m sPo
werkW
0 2 4 6 8 100
100
200
300
400
500
600
700
u m s
PowerkW
0 2 4 6 8 100
100
200
300
400
500
600
700
u m s
PowerkW
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 averages 1-s averages
Powe
r [kW
]Po
wer [
kW]
U [m/s] U [m/s] U [m/s]
U [m/s]
U [m/s]
U [m/s] U [m/s]
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32 Risø 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… :
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33 Risø DTU, Technical University of Denmark
Scanning in 2-D:
”Risley prism”
Dual-prism single-axis beam steering:
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34 Risø DTU, Technical University of Denmark
Scope for further wind LIDAR integration:
Rotor Plane Upwind
Blade integrated
lidar
Spinner integrated
lidar
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35 Risø DTU, Technical University of Denmark
Future research and applications:
1. More precise yaw alignment using lidar2. Proactive (typically +10 s) Pitch control3. Pro-active RPM control4. Warning and mitigating of extreme loads (from gusts)5. More percise power-curve measurememts6. …
Acknowledgements:The Tjæreborg “Lidar-in-spinner Experiment” was conducted as part of the Windscanner.dk RI activities 2009.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.