On- and Offshore Assessment of the ZephIR Wind-LiDAR
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1 On- and Offshore Assessment of the ZephIR Wind-LiDAR Detlef Kindler Kaiser-Wilhelm-Koog GmbH Andy Oldroyd Oldbaum Services Ltd. IEA R&D Task 11, Wind Energy 51 st Topical Expert Meeting on Remote Sensing RISØJanurary 2007 Title Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 1
2 Motivation of test programm, acceptance criteria Onshore campaign at 5M site, Brunsbüttel Offshore campaign on FINO-1: Summary of assessment campaign o o o o WS turbulence Met. conditions: precipitation and visibility WS profiles Twin experiment Further objectives - technical experiences - offshore challanges - future applications Outline Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 2
3 Remote Sensing (LiDAR) chosen as the primary wind resource monitoring method for the DOWNVinD / Beatrice Windfarm Demonstrator Project 5M Offshore Assessment of the capabilities of the the system in terms of availability and data quality Suitability for offshore challanges as of an installation on Beatrice Motivation Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 3
4 Acceptance criteria for the ZephIR being used as the primary wind monitioring method on the Beatrice Alpha platform: Availability Data quality > 95 % (system & data) relative to cups linear regressions through origin Y = mx + b (i.e.with b==0) 0.97 < m < 1 R 2 > 97% Acceptance Criteria Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 4
5 Thies first class Sonic Risoe 120 m 4.0 m Windrichtung (Thies) Temperatur (Thies) Luftdruck (Thies) 90 m 70 m Thies first class 60 m Thies first class sonic Thies first class Niederschlag Temperatur (Thies) 3 Month campaign Straight forward setup procedures Good data access Onshore Test Site Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 5
6 Overall System Availability: 99.6 % Overall Data Availability (10-Min.-Av.): 95.2 % Availability Onshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 6
7 120m Slope: m = m Slope: m = 0.97 Regr. coefficient: R 2 = 0.96 Regr. coefficient: R 2 = 0.97 WS Regressions Onshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 7
8 Onshore results Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 8
9 Cup / LiDAR Sector Wise Comparison 120m Slope R 2 WS Regressions Onshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 9
10 No Correction 90 m AGL Cloud Correction Applied Slope: m = 1.03 Slope: m = 0.97 Regr. coefficient: R 2 = 0.93 Regr. coefficient: R 2 = 0.96 Cloud correction check Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 10
11 103 m North Sea, 45 km North of Island Borkum (D) Platform height: 20 m 81 m 61 m Mast top height: 103 m Annual mean wind speed on 100m app. 10 m/s Prevailing wind dir. SW ZephIR 5 Month campaign March to July Comparison levels cups, vanes, sonics FINO-1 Offshore Test Site Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 11
12 Overall System Availability: % Overall Data Availability (10-Min.-Av.): 99.6 % Availability Offshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 12
13 Height: 103 (78) m WS range: 2 to 20 m/s Slope: m = 0.99 b = 1.48 Regr. coefficient: Wind Vane R 2 = 0.98 Wind Direction Comparison Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 13
14 Height: 103 (78) m WS range: 2 to 23 m/s Slope: m = 0.97 Regr. coefficient: R 2 = 0.99 WS Comparison Offshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 14
15 WS Weibull Distribution Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 15
16 81 (56) m 61 (36) m Slope: m = 0.97 Slope: m = 0.98 Regr. coefficient: R 2 = 0.99 Regr. coefficient: R 2 = 1.00 WS Regressions Offshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 16
17 Offshore results Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 17
18 The QinetiQ ZephIR system has been subject to a stringent test campaign to test the quality of data output; The system has performed well onshore despite the complexity of the terrain surrounding the test site and passed acceptance; System has been tested offshore in similar conditions to the final deployment location on Beatrice, results offshore show better correlation than that returned onshore; Most promissing results are WS deviation from Cups < 3% Availibility close to 100% (NO weather dependence seen) good handling, easy to install System has passed acceptance onshore and offshore; ZephIR has returned quality results in both on- and offshore environments indicating its potential for deployment in the wind industry in both on- and offshore environments. Summary of Assessment Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 18
19 103m Slope: m = m Slope: m = 0.99 Regr. coefficient: R 2 = 0.83 Regr. coefficient: R 2 = 0.89 Turbulence Offshore (%) Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 19
20 Turbulence Offshore (%) Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 20
21 Turbulence Onshore (%) Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 21
22 Quality (PiF) vs. Visibility Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 22
23 Quality (PiF) vs. Visibility Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 23
24 No precipitation influence Precipitation Offshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 24
25 No significant precipitation influence Precipitation Onshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 25
26 Profiles Offshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 26
27 WS Shear Offshore (%) Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 27
28 Twin Experiment Device to Device Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 28
29 Device to Device Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 29
30 Technical Experiences handling, general setup on site theft pre-cautions data retrieval wind data acquisition turbulence measures Technical Experiences Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 30
31 Challenges Offshore accessibility structural stability weather during erection proximity to mast / available space power supply screen clearance, salt & spray debris from birds corrosion: joints and aluminium parts remote control & data retrieval Challenges Offshore Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 31
32 Acceptance and Standardized Application perform a number of real applications to increase experiences and knowledge of the system share experiences within the user community - scientific - best practice application create reproducible calibration procedures - focal length - absolute wind speed accuracy assure device to device reproducibility test site and position independent behaviour of system test each device individually against same standard prior to (and after?) actual deployment Acceptance Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 32
33 Applications & Options wind resource studies power performance tests profiles over rotor plane site assessments Turbulence WS WD shear Max. WS gust forecasting wind turbine wake studies Applications & Options Kaiser-Wilhelm-Koog GmbH IEA T.E.M. RISØ Jan 2007 Slide No. 33
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