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8/7/2019 Catch the Wind Technical Presentation - March 2011
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Tech Brief
October 2010
Catch the Wind
VINDICATOR LASER WIND SENSORThe Future of Wind Sensing Technology
CTW TECHNICAL PRESENTATION 2011 CATCH THE WIND INC.
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Genesis of Catch the Wind
Optical Air Data Systems
(OADS) Established in 1990
Based in Washington, DCarea
Industry leader in fiber-optic
pulsed LDV technology
R&D for aerospaceapplications
Catch the Wind, Inc.
(CTW) Spin-off of OADS
Listed on Toronto VentureExchange (TSX-V: CTW)
Experienced management
team
CEO: Philip Rogers
Former Special Projects
Director at Lockheed Skunk
Works
Co-founder of OADS
2010 Catch the Wind Inc.
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The Ideal Wind Sensor
Measures wind speed and direction at multiple distances ahead of the
sensor location
Can be remotely located from the measurement volume
Measures a volume of air rather than a point measurement
Provides real time measurement of shear, veer, and turbulence
Easily interfaces with turbine controllers and data loggers
Is not sensitive to the operating environment
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Unlike gas and hydro turbines, wind turbines
cannot expect a laminar and controlled inflow.
Traditional anemometers such as cups,
wind vanes, and sonics are point
measurement devices.
Their location on a turbine nacelle results
in the measurement of disturbed and
turbulent airflow.
How Can Wind Turbines Optimally Respond
to the Changing Inflow?
Wind Sensing: The Traditional Approach
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Current Method is Sub-Optimal for Turbine Control
Current Turbine Control Methods Are Reactive
Standard anemometry mounted at rear of nacelle measures wind speed and
direction, after wind has passed through the rotor plane.
This old wind information is fed into the turbine PLC for control.
Since the nacelle anemometry is located in a disturbed flow field, the data often has
to be significantly averaged.
Typical transfer functions (used in some turbine PLCs) cannot account for a non-
laminar uncontrolled in-flow of wind at all times, especially on a complex terrain.
Often, data from stress and strain measuring devices is used to trigger turbine
response to off-axis loading and gusts.
Turbine response to the incoming flow field is almost always REACTIVE.
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Increased Efficiency
andReduced Stress
Control
System
2010 Catch
Catch the Winds Solution
Proactive Turbine Control with VindicatorLaser Wind Sensor (LWS)
Measure wind speed and directionin front of the wind turbine blades
More accurate wind data from undisturbed air
Smart control system adjusts turbine proactively
Intelligent yaw and pitch control
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We simultaneously sense the color change atdifferent distances ahead of the turbine and
calculate wind speed and direction
1
3
4
Three laser beams pulse multiple times
per second
Vindicator LWS provides accurate look-ahead wind data for optimal
turbine alignment and blade pitch
2Lasers reflect off dust particles in wind and
change color
2
How We See the WindLaser Doppler Velocimetry (LDV)
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The Advantage of a Look-Ahead SensorVindicatorLWS vs. Turbine-Mounted Anemometer
Wind Direction (relative to nacelle centerline)
Degrees
Jun. 30, 2010, North-American Wind Farm | Wind speeds: 4.5 to 10.5 m/s; Avg. 7.5 m/sSonic Anemometer: After-market Ultrasonic device, MEASNET-calibrated, IEC-certified
0:10am 1:10am 2:10am 3:10am
Measurements Differ By Up to 20 Degrees
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Laser and Sonic Anemometer Data Comparison20 Second Averages
Wind Direction, 20s-average, 20 minutes
Degrees
Time
-40
-30
-20
-10
0
10
20
30
00:10:00 00:15:00 00:20:00 00:25:00 00:30:00
Laser Anemometer
Jun. 30, 2010, Wind Farm B | Wind speed: 4.5 to 10.5 m/s; Avg. 7.5 m/s
Sonic Anemometer: after-market ultrasonic device, MEASNET-calibrated, IEC-certified
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Difference in Wind Direction Measurements
(Sonic Anemometer vs. Vindicator LWS)
EXAMPLE # 1: Wind Farm in North America
Advantage of Measuring the InflowVindicatorLWS vs. Turbine-Mounted Anemometer
Nacelle Centerline
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Difference in Wind Direction Measurements
(Sonic Anemometer vs. Vindicator LWS)
Advantage of Measuring the InflowVindicatorLWS vs. Turbine-Mounted Anemometer
EXAMPLE # 2: Wind Farm in Europe
Advantage of Measuring the InflowVindicatorLWS vs. Turbine-Mounted Anemometer
Nacelle Centerline
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VindicatorLaser Wind Sensor
Class 1 eye-safe all fiber-optic pulsed Doppler laser
Full motion compensation for turbine mounting as well as offshore buoy installation
Tested under extreme conditions
Operated in harsh marine environment & arctic temperatures
Operating temperature: -40C to 55C Other technical data:
Total weight: 69 kg
External unit: 79 cm L x 43 cm D
Power requirements:
250 W (temp.>0C)
450 W (temp.
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Industry ValidationTesting and First Purchases
Technical & environmental testing
Wind Energy Institute of Canada (WEICan)
National Renewable Energy Laboratory, CRADA
Helimax (Germanischer Lloyd)
Customer validation Nebraska Public Power District
TransAlta
BP Wind Energy
enXco EDF - EN
OEM Validation
Gamesa
(Anonymous first-tier manufacturer)
Offshore buoy integration & testing
AXYS Technologies
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Technical Validation by Helimax
(Germanischer Lloyd)
Data supplied by Helimax GL, Apr. 2010
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VindicatorControl of V-82 at NPPD
Installed in July 2009
Deployed and in control for
19Months on Vestas V-82Turbine #T22 at NPPD
Began Control Algorithm
Optimization Program in
July 2010
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Field TrialsNebraska Public Power District
Average Energy IncreaseOver 11 Months Prior to Optimization
14%
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NPPD: Reduced Stress Load on Critical Components
SWANTech report
Independent third party
Test turbine went from worst to best with
Vindicator LWS control
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Preliminary Optimization Experiment Data
Over 20% Average Energy Increase
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Nordex N60 Data
11.1%Average Energy
Increase
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-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00
50.00
14:10 14:15 14:20 14:25
10min avg.
On Average, Turbines Seem Well Aligned With the Wind
Aug. 14, 2009, NPPD-Ainsworth, T22, Laser measurement
Laser Wind Direction (relative to nacelle centerline)
Degrees
Time
Most turbine controllers would not initiate yawing here
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-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00
50.00
14:10 14:15 14:20 14:25
10min avg. 3min avg.
The Picture Looks Less Favorable For Shorter Time-
Averages
Aug. 14, 2009, NPPD-Ainsworth, T22, Laser measurement
Laser Wind Direction (relative to nacelle centerline)
Degrees
Time
Most efficiency calculations stop here
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This is How The Wind Really Behaves
Aug. 14, 2009, NPPD-Ainsworth, T22, Laser measurement
Laser Wind Direction (relative to nacelle centerline)
Degrees
Time
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00
50.00
14:10 14:15 14:20 14:25
10min avg. 3min avg. Observed
Optimization potential much larger than assumed by industry
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Average Integrated Yaw Error
Summary of turbine yaw misalignment at trial sites
Turbine Model Avg. Integrated Yaw Error RMS Error
Vestas V-82 15 21
Nordex N60 13 16
Vestas V-82 15 19Other 2.0 MW 15 19
Other >2.0 MW 12 17
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Yaw Error Equals Loss of Power
Source:
TF Pederson, et al, "Wind Turbine Power Performance Verification in
Complex Terrain and Wind Farms" (RISO-R-1330)
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Power Increase Translates to Cash Flow
Vestas 1.65 MW Clipper 2.5 MW 25
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Increased ROI
1. Increased Power Output
2. Decreased OperatingCosts
3. Longer Lifetime
Value Created by Vindicator LWS
PROVEN TECHNOLOGY FOR WIND FARM
OPERATORS AND TURBINE OEMS
Decreased cost
per kilowatt hour
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Summary
Existing methodologies in wind measurement dont capture real wind characteristics:
Measure from sub-optimal location
Use time-averaging and transfer functions to compensate for location of measurement
instruments in turbulent flow
Results in significant average yaw misalignment = loss of power
Future wind turbines need forward looking laser wind sensor data to increase
efficiency and reduce stress loading
Accurate and timely speed and direction of undisturbed flow
Feed forward yaw control
Proactive blade pitch regulation
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Providing the wind industry better wind information forproactive, intelligent yaw and pitch control
28
Bill Fetzer
VP, Business Development
703-393-0754
wfetzer@catchthewindinc.com
Contact
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