deep sea offshore wind power r&d seminar trondheim, 20-21 ... · vision i: (1) full scale off...
TRANSCRIPT
Deep Sea Offshore Wind PowerR&D Seminar Trondheim, 20-21 Jan. 2011 ,
Atmospheric Profiling by Lidar for Wind Energy ResearchEnergy Research
Torben Mikkelsen
Wind Energy DivisionRisø National Laboratory for Sustainable Energy - DTU
WindScanner.dk
From new Wind Lidar Technologygy
towards new Wind Energy
Research Infrastructures : EU ESFRISpinnerEX
WindScanner.dk2010-2013
Research Infrastructures…: EU ESFRI
Road Map
2010 MusketeerEX 2007/2008
SpinnerEX 2009
RI focusFirst CW Wind
lidar 2004
00 / 008
Scientific focus
Technical focus
Risø DTUWINDSCANNER.DK 2 Risø DTU, Technical University of Denmark
VISION I:(1)
VISION I:Full scale off and on shore measurements on WT arrays & wakes e.g. as here at Horns reef
Risø DTUWINDSCANNER.DK 3 Risø DTU, Technical University of Denmark
Vision II: RI WindscannerSecure wind resource estimation in particular in complex terrain2
Risø DTUWINDSCANNER.DK 4 Risø DTU, Technical University of Denmark
(3)
VISION IIIPro active wind turbine control from upwind measurements by lidars Pro-active wind turbine control from upwind measurements by lidars
integrated in the nacelle… :
Risø DTUWINDSCANNER.DK 5 Risø DTU, Technical University of Denmark
Short-range WindScannersS o t a ge dSca e s
Risø DTUWINDSCANNER.DK 6 Risø DTU, Technical University of Denmark
The RI WINDSCANNER methodology is based on 3-dimensional scanning with wind lidars to determine the instantaneous turbulence
fields:fields:
Since 2005 wind lidar technology has enabled
Risø DTUWINDSCANNER.DK 7 Risø DTU, Technical University of Denmark
gyreplacement of tall (>100m) met masts
Our Aim: To measure 3-D wind fields in 2-D planes p
Risø DTUWINDSCANNER.DK 8 Risø DTU, Technical University of Denmark
Wind Turbines of today and tomorrow extract energy from the wind… ….but generates also wakes, over land…(eScience):
…and off-shore (Middelgrunden @ Copenhagen…)
Risø DTUWINDSCANNER.DK 9 Risø DTU, Technical University of Denmark
MusketeerEx-II:MusketeerEx-II:Høvsøre Dec. 2008 Windscanner lidar testSpatial-resolution improved ”Stretch Pod” Unit 107 (left) vs. Windscanner Unit 120 (right)
Risø DTUWINDSCANNER.DK 10 Risø DTU, Technical University of Denmark
.. The first assembled Windscanner (April 2010):
Risø DTUWINDSCANNER.DK 12 Risø DTU, Technical University of Denmark
WindScanner.dk: 12 -axes Control System
Conneting and steering of 9 (+3 ) akser:
Risø DTUWINDSCANNER.DK 14 Risø DTU, Technical University of Denmark 14
Long-Range WindScanning:o g a ge dSca gOn and offshore Ressource Assessment,Wind Conditions, Wakes
Risø DTUWINDSCANNER.DK 15 Risø DTU, Technical University of Denmark
Specifications: Long-Range Wind Scanner:
WLS70 +2D Risø DTU/ Leosphere Scan Head:
• Range:• Range 1.5 - 5 km depending on aerosols
and sampling time• Resolution:• Space: Line-of-sight: 50-55 m(FWHM)• Time: 1-10 s pr. measurement• Drive specifications for both axis:• Resolution ≤ 2mrad• Speed ≤ 50°/s• Acceleration > 100°/s2• Rotation = Continuous• Backlash ≤ 0.5mrad• Endless rotation• Full sky scanning + “down-look”
Risø DTUWINDSCANNER.DK 16 Risø DTU, Technical University of Denmark
First Long Range Windscanner: O t 2010First Long-Range Windscanner: Oct.2010Joint Risø DTU-Leosphere WLS70 (<1.5 km)/200 (<5 km)
Risø DTUWINDSCANNER.DK 17 Risø DTU, Technical University of Denmark
First Long-Range (Max range 5 km) WindScanner
Risø Workshop Risø DTU, Leosphere, Fr. and IPU, DK, Oct. 2010
Risø DTUWINDSCANNER.DK 18 Risø DTU, Technical University of Denmark
Turbulence measured over Risø DTU by Doppler Lidar
for basic power spectral and coherence studies
Risø DTUWINDSCANNER.DK 20 Risø DTU, Technical University of Denmark
Risø MET- Mast EX Dec 2009
• 125 m above ground: Inertial Subrange
Risø DTUWINDSCANNER.DK 21 Risø DTU, Technical University of Denmark
(3)
Results to date…: Pro active wind turbine control from upwind measurements by lidars Pro-active wind turbine control from upwind measurements by lidars
integrated in the nacelle… :
Risø DTUWINDSCANNER.DK 22 Risø DTU, Technical University of Denmark
• 25 kW Wind Turbine 1975: •2.3 MW NM80
Ø
• Ø/H ~ 0.3 • Height 59 m;
• Ø=80HØ • Ø/H ~ 1.4
HHHH
Risø DTUWINDSCANNER.DK 24 Risø DTU, Technical University of Denmark
Measurement Setup’s:
Period Wedge Distance
April – May 2009 15o ~1.24Øp y
July – August 2009 30o ~0.58Ø
Animation Horizontal Wind Speed.avi
Wind speed values per rotation (each frame contains 10 consecutive
scanning circles)
Risø DTUWINDSCANNER.DK 25 Risø DTU, Technical University of Denmark
CW Lidar: ZephIR (50 Hz)
Tj b Tjæreborg SPINNER-EX
2009
Spinner – mounted lidar
Wind Turbine: NM80(NegMicon/Vestas)(NegMicon/Vestas)
Risø DTUWINDSCANNER.DK 26 Risø DTU, Technical University of Denmark
Tjæreborg: ZephIR “Spinner-Ex.” …:Tjæreborg: ZephIR Spinner Ex. …:
Risø DTUWINDSCANNER.DK 27 Risø DTU, Technical University of Denmark
Time series (10 s) of approaching wind ( ) pp gconditions measured +100 m upwind:
E I h i d fi ldEx.: Inhomogeneous wind field
Risø DTUWINDSCANNER.DK 30 Risø DTU, Technical University of Denmark
Upwind @ 1.24 Ø (+ 100 m):
The loci of the focussed lidar beam
Radial wind speeds
during a 10-min sampling period
Risø DTUWINDSCANNER.DK 31 Risø DTU, Technical University of Denmark
Results
Correlation between lidar and mast
Study of the approaching wind field
Risø DTUWINDSCANNER.DK 32 Risø DTU, Technical University of Denmark
Scanning in 2-D:Scanning in 2 D:
”Risley prism”
Dual-prism single-axis beam steering:p g g
Risø DTUWINDSCANNER.DK 33 Risø DTU, Technical University of Denmark
2D LIDAR UpWind Scan patterns:
Scan Patterns for principle 1,different possibilities
Scan pattern series 2, n= 6
and
Scan pattern series 8, n=6
Risø DTUWINDSCANNER.DK 34 Risø DTU, Technical University of Denmark
Scope for further wind LIDAR integration:Scope for further wind LIDAR integration:
Rotor Plane Upwind
Blade integrated
Spinnerintegratedintegrated
lidarintegrated
lidar
Risø DTUWINDSCANNER.DK 35 Risø DTU, Technical University of Denmark
Lidar-based Remote Sensing:
Off h Wi d S d P filOffshore Wind Speed Profiles:
Why ”Remote Sensing” ?
• Wind Turbines are becoming BIG!• Tall ( > 100 meters) Meteorological Towers expensive• Tall Met Towers are difficult to move
Risø DTUWINDSCANNER.DK 36 Risø DTU, Technical University of Denmark
3
SODAR SO nd Detection And RangingSODAR: SOund Detection And Ranging
Risø DTUWINDSCANNER.DK 37 Risø DTU, Technical University of Denmark
3
R.L Schwiesow, Probing the atmospheric boundary layer
Monostatic SODAR
Risø DTUWINDSCANNER.DK 38 Risø DTU, Technical University of Denmark Lidar and sodar Introduction
3
Test of SODAR’S
HeimdallHeimdall
Aeronvironment
Risø DTUWINDSCANNER.DK 40 Risø DTU, Technical University of Denmark
4
N o n - f i l t e r e d d a t a ( p o i n t s r e c o v e r e d 9 5 4 9 o u t o f 1 2 5 3 2 ) , s e c t o r : 0 ° -3 6 0 °
y = 1 . 0 0 3 5 x - 0 . 0 7 9
2 0
2 5
1 0
1 5
2 0
soda
r 130
m, w
sp (m
/s)
0
5
0 5 1 0 1 5 2 0 2 5
t o w e r 1 2 5 m , w s p ( m / s )
s
8<SNR<35 (no. of points 4210), sector: 0°-360°
y = 1.0331x - 0.3219
14
16
18
6
8
10
12
dar 1
30m
, wsp
(m/s
)
-2
0
2
4
0 2 4 6 8 10 12 14 16 18
tower 125m, wsp (m/s)
sod
Risø DTUWINDSCANNER.DK 42 Risø DTU, Technical University of Denmark
4
Ground-based RS Wind Sensors @ Høvsøre 2004 - 2009:
SODARS
CW LIDARS
Pulsed LIDARS
Risø DTUWINDSCANNER.DK 44 Risø DTU, Technical University of Denmark
4
Sodar data is inherently noisier than lidar datadata
d lid
AQS500 Spd 75m vs Cup 80my = 1.0237x + 0.0055
R2 = 0.989 Windcube vs Cup at 80my = 0.9969x - 0.0447
R2 = 0.9962y = 0.9922xR2 = 0.9962
sodar lidar
20
25
20
25
15
500
75m 15
peed
[m/s
]5
10AQ
S5
5
10
Lida
r sp
00 5 10 15 20 25
Cup 80m
0
5
0 5 10 15 20 25
C d 80 [ / ]
Risø DTU, Technical University of Denmark
Cup 80m Cup speed 80m [m/s]
Meteorological masts and transformer platformMeteorological masts and transformer platform
C t d t• Cup anemometers and vanes atdifferent levels on all masts(15~70m)
Courtesy: Dong Energy
• LIDAR/SODAR installed at 20mon the platform
• Campaign period: May 2 – Oct29, 2006
Risø DTUWINDSCANNER.DK 49 Risø DTU, Technical University of Denmark
4
Courtesy: Dong Energy
Horns Rev 2006 ZephIR Lidar and an AQ-SODAR side-by-
12 Mega Watt….RS Off Shore
Horns Rev 2006 ZephIR Lidar and an AQ SODAR side byside…:
Risø DTUWINDSCANNER.DK 50 Risø DTU, Technical University of Denmark
5
Correlations between LIDAR and M2/M6 for free Correlations between LIDAR and M2/M6 for free sectors
Risø DTUWINDSCANNER.DK 51 Risø DTU, Technical University of Denmark
5
Wind profile extension with LIDAR data at M2/M6
Risø DTUWINDSCANNER.DK 52 Risø DTU, Technical University of Denmark
5
Wind Shear as function of TemperatureWind Shear as function of Temperaturedifference: Tair - SST Courtecy: Leo Jensen, Dong Energy
Risø DTUWINDSCANNER.DK 56 Risø DTU, Technical University of DenmarkDoc. info 271939 56
Tall Wind Profiles: Lidar WLS70 50m-1.5 km
Lidar vs. Høvsøre Met-mast @ 100 m:
Risø DTUWINDSCANNER.DK 64 Risø DTU, Technical University of Denmark
Wind Speeds @ Høvsøre 100m heightWRF Prediction vs Lidar MeasurementsWRF Prediction vs. Lidar Measurements
Risø DTUWINDSCANNER.DK 65 Risø DTU, Technical University of Denmark
WRF vs. Lidar @ 100 m (left) @ 600 m (right)
Risø DTUWINDSCANNER.DK 66 Risø DTU, Technical University of Denmark
WRF Profiles vs. Met-mast/Lidar @ 10-600mFriction velocity u from WRFFriction velocity u* from WRF.Binned according to Atm. Stability.
Risø DTUWINDSCANNER.DK 67 Risø DTU, Technical University of Denmark
Find more details at:www risoe dk
• Acknowledgements to many Risø DTU colleges:
www.risoe.dkwww.windscanner.dk
• Acknowledgements to many Risø DTU colleges:
• Charlotte HasagerAlfredo Peña• Alfredo Peña
• Roger Floors, • Ekaterina Batchvarova
S E ik G i• Sven-Erik Gryning• Andrea Hahmann• Mikael Sjöholm
k l l• Nikolas Angelou• Kasper Hansen
Risø DTUWINDSCANNER.DK 68 Risø DTU, Technical University of Denmark