The iSpin technology at the spinner allows owners to accurately measure the most important input parameter of wind turbine operation: the wind speed and direction. This allows operators to determine undetected yaw misalignment. After correcting the yaw misalignment, owners can tap the full potential of the wind turbines, reduce damaging loads, and decrease repair cost. Combining yaw misalignment with turbulence intensity and inflow angles in all wind sectors, the iSpin technology turns the wind turbines into virtual wind met masts. Finally, the iSpin technology is capable of determining IEC compliant power curves as well as performance monitoring during operations of the wind turbine life time.

1. #WindWebinar

2. #WindWebinar
ROMO Wind is a technology and service company
and the exclusive provider of the patented iSpin technology.
We provide our customers with the best solutions for measuring,
monitoring and improving wind turbine performance for a
better return on their investment.
ROMO Wind at a glance
Page 2
ROMO Wind AG
Baarer Strasse 80
6300 Zug
Switzerland
sales@romowind.com
Offices in Denmark,
Germany, Italy, UK, Ireland,
Spain, Switzerland and
France.
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin
Our partner in North America:

3. #WindWebinar
Agenda
Page 3
Create transparency in your wind park operations by monitoring3
A solution: The iSpin technology2
The problem: Inaccurate wind measurements at wind turbines1
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

4. #WindWebinar
Illustration of why nacelle
anemometers don’t work
Page 4
Wind vane issues
• Even very small installation errors mean large yaw misalignments
• Sensor resolution
• Errors with the wind sensors
• Turbines today do not monitor and correct yaw misalignments
Site conditions differ
• Terrain conditions
• Turbine prototype test conditions
• Other wind turbines
Ancillary equipment alters the nacelle flow
• Retrofitting of e.g. new aviation lights
• Relocation or change of wind direction sensor
• Nacelle based lidars
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

5. #WindWebinar
Agenda
Page 5
3
2
1
Create transparency in your wind park operations by monitoring
A solution: The iSpin technology
The problem: Inaccurate wind measurements at wind turbines
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

6. #WindWebinar
Overcoming issues with current
wind measurements
Page 6
Control
loads
Yaw
misalignment
correction
Relative
power curve
comparisons
Improve
production
forecast
iSpin
Improve
performance
Reduce
maintenance
costs
Life time
extension
Optimise
revenues
Monitor
performance
Position of
conventional nacelle
anemometer
Position of
iSpin spinner
anemometer
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

7. #WindWebinar
The iSpin technology
Page 7
• Invented and developed by DTU / RISØ in Denmark since 2004
• Innovative application of “old” proven ultrasonic measurement technology
• Since April 2013: IEC 61400-12-2 standard for performance measurement
• Acquired and industrially developed by ROMO Wind since 2011
• What iSpin measures:
- Wind speed (rotor speed and “free” wind)
- Yaw misalignment
- Inclination angle
- Turbulence intensity
- Temperature
- Air density (by adding an air pressure sensor)
- Wind direction (by adding a nacelle direction sensor)
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

8. #WindWebinar
How the spinner anemometer
works
Page 8
38 degree yaw misalignment0 degree yaw misalignment
Measured wind speed by the 3 sensors
at wind direction 90° to rotor swept area
Measured wind speed by the 3 sensors
on a wind turbine with yaw misalignment
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

9. #WindWebinar
Agenda
Page 9
3
2
1
Create transparency in your wind park operations by monitoring
A solution: The iSpin technology
The problem: Inaccurate wind measurements at wind turbines
Power performance3.3
Advanced wind measurements3.2
Yaw misalignments3.1
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

10. #WindWebinar
Agenda
Page 10
3
2
1
Create transparency in your wind park operations by monitoring
A solution: The iSpin technology
The problem: Inaccurate wind measurements at wind turbines
Power performance3.3
Advanced wind measurements3.2
Yaw misalignments3.1
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

11. #WindWebinar
Yaw misalignment measured
with iSpin
Page 11
static yaw
misalignment
range of dynamic yaw
misalignment
relevant range of
wind speeds
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

12. #WindWebinar
Yaw misalignment monitoring is
necessary
Page 12
15o initial yaw
misalignment
Correction
Wind vane
exchange
Re-correction
Wind vane exchange Aviation lights
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

13. #WindWebinar
Static yaw misalignments are very
frequent
Page 13
ROMO Wind’s static yaw misalignment statistics
(266 wind turbines)
Static yaw
misalignment
<4° 4°- 8° 8°-12° 12°-16° >16°
Distribution 48% 28% 14% 5% 5%
à 1,98% more AEP
by having the static yaw misalignments corrected.
Every day without yaw misalignment optimisation is a net loss.
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

14. #WindWebinar
Yaw misalignments = loss of
production
Page 14
Yaw
misalignments
Lower
production
4° 0.5%
6° 1.1%
8° 1.9%
10° 3.0%
12° 4.3%
14° 5.9%
16° 7.6%
18° 9.5%
Relative power
curve comparison
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

15. #WindWebinar
All turbine types suffer yaw
misalignment – to varying degrees
Page 15
Per turbine type
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

16. #WindWebinar
Benchmarking of yaw control (1/2)
Page 16
Bad yaw controlAverage yaw controlGood yaw control
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

17. #WindWebinar
Yaw misalignments = higher loads*
Page 17
*report by GL Garrad Hassan, Fatigue Load Calculations for ROMO Wind to Assess Sensitivity to Changes in 10-min Mean Yaw Error, 29-11-2012,
report is publicly available on our website www.romowind.com in the “Knowledge centre” section.
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

18. #WindWebinar
Agenda
Page 18
3
2
1
Create transparency in your wind park operations by monitoring
A solution: The iSpin technology
The problem: Inaccurate wind measurements at wind turbines
Power performance3.3
Advanced wind measurements3.2
Yaw misalignments3.1
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

19. #WindWebinar
Advanced wind measurements:
wind speed
Page 1921 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

20. #WindWebinar Page 20
24% turbulence
intensity
21% turbulence
intensity
20% turbulence
intensity
20% turbulence
intensity
Enables comparison of the original site evaluation
with measured data for turbulence intensity and flow
inclination.
IEC 61400:
• Turbulence intensity A < 18%; B < 16%
• Flow inclination < 8°
Turbulence intensity and flow
inclination
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

21. #WindWebinar
Advanced wind measurements:
turbulence intensity
Page 2121 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

22. #WindWebinar Page 22
Advanced wind measurements:
flow inclination
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

23. #WindWebinar
Agenda
Page 23
3
2
1
Create transparency in your wind park operations by monitoring
A solution: The iSpin technology
The problem: Inaccurate wind measurements at wind turbines
Power performance3.3
Advanced wind measurements3.2
Yaw misalignments3.1
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

24. #WindWebinar
Power Curve Measurements
Page 2421 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

25. #WindWebinar Page 25
High correlation between met mast
and iSpin
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

26. #WindWebinar Page 26
Power curve comparison (1/2)
Met mast
Nacelle based
LiDAR
Nacelle
anemometer
iSpin
Filtered for wake, air density and wind sector according to IEC standard.
iSpin shows 30% less variation on wind speeds than met-mast and LiDAR
Forward looking wind measurement Local wind measurement
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

27. #WindWebinar Page 27
Power curves and scatter (std.
dev.) in undisturbed inflow
101 – 229 deg
0
500
1000
1500
2000
2500
0 5 10 15 20 25
Power[kW]
Wind speed [m/s]
Manufacturer
SA
Lidar
Met-mast
0
20
40
60
80
100
120
140
160
180
0 5 10 15 20
Standarddeviation[kW]
Wind speed [m/s]
SA
Lidar
Met-mast
Comparison with the IEC met mast measurement:
iSpin 2 IEC: Δ = 0,4 %
Lidar 2 IEC: Δ = -7,7 %
Comparison with the warrantied power curve:
IEC 2 PCw: Δ = 1,2 %
iSpin 2 PCw: Δ = 1,6 %
Lidar 2 PCw: Δ = -6,5 %
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

28. #WindWebinar Page 28
Power curves – undisturbed inflow
101 – 229 deg
Power curves for turbines
2,3,4,5,6,10,11,12,13
Turbines 7,8,9 running in noise
reduced mode – different power
curves.
Turbine 1 with different installation
mode.
Data
#2,3,4,5,6: 7 Sep -> 22 Oct 2015
#1,10,11,12: 23 Sep -> 22 Oct 2015
0
500
1000
1500
2000
2500
Power[kW]
Wind speed [m/s]
Power curves - undisturbed inflow
NKE02, AEP=9.196 GWh, 1.10% w.r.t
MF
NKE03, AEP=9.189 GWh, 1.02% w.r.t
MF
NKE04, AEP=9.244 GWh, 1.63% w.r.t
MF
NKE05, AEP=9.260 GWh, 1.81% w.r.t
MF
NKE06, AEP=9.077 GWh, -0.20%
w.r.t MF
NKE10, AEP=9.198 GWh, 01.12%
w.r.t MF
NKE11, AEP=9.130 GWh, 0.38% w.r.t
MF
NKE12, AEP=9.292 GWh, 2.16% w.r.t
MF
NKE13, AEP=9.0167 GWh, -0.88%
w.r.t MF
Manufacturer (MF) power curve
Comparison with the IEC met mast measurement:
iSpin 2 IEC: Δav. = 0,4 %; Δmax = 1,0 %
Comparison with the warranted power curve:
iSpin 2 PCw: Δav. = 1,3 %; Δmax = 2,2 %
(except for NKE01 where sensor mounting was slightly different, 4.7%)
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

29. #WindWebinar Page 29
Power curve comparison (2/2)
Met mast
Nacelle based
LiDAR
Nacelle
anemometer
iSpin
Forward looking wind measurement Local wind measurement
No filtering for wind sector or wake. The nacelle anemometer power curve as seen in SCADA system.
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

30. #WindWebinar Page 30
Power curves and scatter (std.
dev.) in undisturbed inflow
0 – 360 deg
0
500
1000
1500
2000
2500
0 5 10 15 20 25
Power[kW]
Wind speed [m/s]
Manufacturer
SA
Lidar
Met-mast
0
100
200
300
400
500
600
0 5 10 15 20 25
Standarddeviation[kW]
Wind speed [m/s]
SA
Lidar
Met-mast
Comparison with the IEC power curve measurement:
iSpin 2 IEC*: Δ = 0,1 %
*… IEC compliant in the free wind sectors only
Comparison with the warrantied power curve:
iSpin 2 PCw*: Δ = 1,63 %
*… IEC compliant in the free wind sectors only
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

31. #WindWebinar Page 31
Power curves 0–360 deg including
wakes
Power curves for turbines
2,3,4,5,6,10,11,12,13
Turbines 7,8,9 running in noise
reduced mode – different power
curves (not shown)
Turbine 1 – different installation
mode
Data
#2,3,4,5,6: 7 Sep -> 22 Oct 2015
#1,10,11,12: 23 Sep -> 22 Oct
2015
0
500
1000
1500
2000
2500
Power[kW]
Wind speed [m/s]
Power curves 0-360 deg including wakes
NKE02, AEP=9.179 GWh, 0.92%
w.r.t MF
NKE03, AEP=9.158 GWh, 0.69%
w.r.t MF
NKE04, AEP=9.214 GWh, 1.30%
w.r.t MF
NKE05, AEP=9.203 GWh, 1.18%
w.r.t MF
NKE06, AEP=9.056 GWh, -0.43%
w.r.t MF
NKE10, AEP=9.135 GWh, 0.43%
w.r.t MF
NKE11, AEP=9.079 GWh, -0.18%
w.r.t MF
NKE12, AEP=9.237 GWh, 1.56%
w.r.t MF
NKE13, AEP=8.967 GWh, -1.41%
w.r.t MF
Manufacturer (MF) power curve
Comparison with the IEC met mast measurement:
iSpin 2 IEC: Δav. = -0,3 %; Δmax = 0,4 %
Comparison with the warranted power curve:
iSpin 2 PCw: Δav. = 0,9 %; Δmax = 1,6 %
(except for NKE01 where sensor mounting was slightly different, 4.7%)
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

32. #WindWebinar
Summary: iSpin brings tangible
and large benefits
Page 32
Increased annual energy production:
• Possible to measure and correct static yaw alignments (~2.0 % AEP increase)
• Enables improved turbine operation to account for sector wise characteristics based on actual
measurements (turbulence intensity, flow inclination, etc.)
• Enables assessment and documentation of the effects of other optimisation technologies by accurately
measuring relative power curve changes
• Enables intervention if the wind turbine underperforms
• Some turbines can further increase the AEP by 0.2-1.5% by improving dynamic yaw problems. Requires
collaboration with turbine manufacturer
Prolonged turbine life time and reduced maintenance costs
• Correcting yaw misalignment reduces loads; stop decreasing life time and increasing maintenance costs of
major components (rotor, drivetrain, gearbox)
• Optimised turbine operation resulting from measurement of damaging wind conditions (flow inclinations and
turbulence intensity) in all wind sectors can also prolong life time and reduce maintenance costs
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

33. #WindWebinar
Questions?
Karl Fatrdla
Head of Sales
Romo Wind AG
619.606.8797
kf@romowind.com
Michelle Froese
Editor - Moderator
Windpower Engineering
mfroese@wtwhmedia.com
@Windpower_Eng

34. #WindWebinar
cos² relationship
Page 34
Turbine
comparison
Relative power
curve comparison
Documented
proof
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

35. #WindWebinar
All turbine types suffer yaw
misalignment – to varying degrees
Page 35
Per turbine type
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

36. #WindWebinar
Yaw misalignment measured with
iSpin vs. lidar
Page 3621 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

37. #WindWebinar
Yaw misalignment measured with
iSpin vs. lidar open sectors*
Page 37
*Wind sectors with wake effects or terrain obstacles filtered out
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

38. #WindWebinar
EFFECT OF O&M RE-
CALIBRATION OF WIND SENSORS
Page 3821 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

39. #WindWebinar
RE-CALIBRATION OF WIND
SENSORS
Page 39
YM measured
(degrees)
YM after OEM
recalibration
Delta YM after
recalibration
Turbine #1 7,8 11,0 3,2
Turbine #2 1,8 4,6 2,8
Turbine #3 4,2 6,8 2,6
Turbine #4 3,8 4,8 1
Turbine #5 6,7 7,2 0,5
Turbine #6 8,7 8,3 -0,4
Turbine #7 8,6 7,8 -0,8
Turbine #8 7,9 7,0 -0,9
Turbine #9 11,9 11,0 -0,9
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

40. #WindWebinar Page 40
Relative power curve monitoring
For 6m/s annual wind
speed with Rayleigh
wind distribution the
increase would be
around 5.5%
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

41. #WindWebinar Page 41
iSpin measurements not affected
by vortex generator installation or
yaw misalignment correction
iSpin vs met mast Nacelle anemometer vs met mast
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

42. #WindWebinar
iSpin Basic
Page 42
Designed for:
• Turbine owners and operators who want to
maximise the revenue from their installed base
• Permanent installation
Data included in the quarterly reports:
• Static yaw misalignment
Power supply:
• Fixed power supply in hub: 230 VAC, 24 VDC
or 24 VAC (other by request)
Service technician interface:
• SMS via mobile phone
• LEDs on the iSMB HW
Requirements:
• Local SIM card for SMS and dial up data
(2G or 3G GSM coverage)
3 x Spinner
Anemometer
Sensor Control
Unit (Metek Box)
Hub/rotor Nacelle
Power supply
Data Collection and
Communication Unit
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

43. #WindWebinar
iSpin Advanced
Page 43
3 x Spinner
Anemometer
Sensor Control
Unit (Metek Box)
Hub/rotor Nacelle
Power supply
Data Collection and
Communication Unit
Designed for:
• Turbine owners and operators
• Permanent installation
Data included in the quarterly reports:
• All values from iSpin Basic
• Wind speed
• Turbulence intensity
• Flow inclination
• Temperature
Customer data interface:
• Modbus/TCP for online data
• FTP for historical data (10 min. avr.)
ROMO data interface:
• Mita-Teknik Gateway
Power supply:
• Fixed power supply in hub: 230 VAC, 24 VDC
or 24 VAC (other by request)
Service technician interface:
• Web browser with Java
Requirements:
• Internet access via Broadband or local SIM
card for 3G data (3G GSM coverage on site)
Nacelle position Sensor
(GPS) option 1*
ROMO Wind Data
Centre via Internet
Nacelle power
supply 230 VAC
Nacelle
position
Sensor/
option 2*
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

44. #WindWebinar
iSpin Advanced Plus
Page 44
3 x Spinner
Anemometer
Sensor Control
Unit (Metek Box)
Hub/rotor Nacelle
Power supply
Data Collection and
Communication Unit
ROMO Wind Data
Centre via Internet
Nacelle power
supply 230 VAC
Nacelle
position
Sensor/
option 2*
Nacelle position sensor
(GPS) option 1* and
Air pressure sensor
Designed for:
• Turbine owners and operators
• Permanent installation
Data included in the quarterly reports:
• All values from iSpin Advanced
• Air density
• Relative power curve
Customer data interface:
• Modbus/TCP for online data
• FTP for historical data (10 min. avr.)
ROMO data interface:
• Mita-Teknik Gateway
Power supply:
• Fixed power supply in hub: 230 VAC, 24 VDC
or 24 VAC (other by request)
Service technician interface:
• Web browser with Java
Requirements:
• Internet access via Broadband or local SIM
card for 3G data (3G GSM coverage on site)
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

45. #WindWebinar
Installation of iSpin in the spinner
Page 45
• Installed from the inside of the spinner in all
kinds of weather conditions (120 degrees spacing)
• Spinner anemometer(s) aligned with the centre line
• Completed within 2 to 5 hours
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

46. #WindWebinar
Installation of iSpin Advanced in the nacelle
Page 46
• Installation is independent of all other
equipment in the wind turbine except for
power in the spinner for iSpin Basic and
power in the nacelle for iSpin Advanced /
iSpin Advanced Plus.
Collector
Ring
Fuse box Transformer
21 January 2016 | ROMO Wind Introducing the spinner anemometer iSpin

47. #WindWebinar
q This webinar will be available at
www.windpowerengineering.com & email
q Tweet with hashtag #WindWebinar
q Connect with Windpower Engineering & Development
q Discuss this on EngineeringExchange.com
Don’t Forget!

48. #WindWebinar