View
14
Download
0
Category
Preview:
Citation preview
Title slide/end slide image dimensions:
Title slide images must always fit this size:
Height: 10.6 cm; Width: 25.4 cm
Title slide images must always follow this position:
Horizontal: 0 cm; Vertical: 0 cm
To change title slide/end slide image:
Contact Communication Support
Tip:
Vestas drawing guides will help you position and
crop images and objects. Images and objects will
snap to drawing guides when repositioned or
cropped.
To add drawing guides:
• Right-click on next to slide
• Select ‘Grid and Guides…’
• Check ‘Display drawing guides on screen’
• Press ‘OK’
Advanced nacelle anemometry and SCADA-data, analysis techniques and limitations
Frank Ormel
Chief Specialist in Product Integration
Vestas
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
Outline
EWEA presentation July 2012 Lyon 2
• Introduction
• State of the art
• Advanced methods
• Nacelle Power Curve standard
• Conclusion
Contributors:
Irene Lauret Ducosson, Martin de Mare, Rolf Erik Keck,
Carsten Krogh Nielsen
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
EWEA presentation July 2012 Lyon 3
The purpose: performance monitoring and park optimisation
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
The problem: correlation to free stream wind
EWEA presentation July 2012 Lyon 4
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
EWEA presentation July 2012 Lyon 5
The problem: correlation to free stream wind
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
Apparent AEP & real AEP
EWEA presentation July 2012 Lyon 6
The apparent effect of a nacelle
anemometer measurement error
The real effect of the same
nacelle anemometer
measurement error
Original power curve
It seems like the power
performance has ben
reduced by 10% whereas
in reality it has been
reduced by 0.5%
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
EWEA presentation July 2012 Lyon 7
The problem: seasonal variation
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
EWEA presentation July 2012 Lyon 8
State of the art: detection of icing
161412108642
1800
1600
1400
1200
1000
800
600
400
200
0
Wind speed (Normalized)
Av
gP
ow
er
2010-12-24
2010-12-25
2010-12-26
2010-12-27
2010-12-28
Day
Scatterplot of AvgPower vs Wind speed (Normalized)
161412108642
1800
1600
1400
1200
1000
800
600
400
200
0
Wind speed (Normalized)
Av
gP
ow
er
2010-12-27
2010-12-28
2010-12-29
2010-12-30
2010-12-31
2010-12-18
2010-12-19
2010-12-20
2010-12-21
2010-12-22
2010-12-23
2010-12-24
2010-12-25
2010-12-26
Day
Scatterplot of AvgPower vs Wind speed (Normalized)
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
State of the art: incorrect pitching
EWEA presentation July 2012 Lyon 9
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
State of the art: overview
EWEA presentation July 2012 Lyon 10
In general, we can confidently detect the following field
performance issues:
• Icing
• Yaw error
• Pitch problems
• De-rating problem
• Curtailment
• Incorrect control parameters influencing performance
• Incorrect nacelle transfer function
• Directional influence
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
Standardisation: IEC 61400-12-2 standard
EWEA presentation July 2012 Lyon 11
The project team has submitted the FDIS to the IEC June
2012. When approved by the national committees the
standard can be expected around summer 2013
The standard is not easier than -12-1; a lot of focus has
been put in to reduce variance. Still, total uncertainty of the
test is higher than -12-1 standard (power curve test with
met-mast)
Useability will largely depend on OEMs to be compliant with
this standard through their software – in which case costs
are significantly lower than for a -12-1 test
Main challenge is to separate terrain influence on wind
speed from rotor infuence
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
Advanced techniques: NTF calculated by CFD
EWEA presentation July 2012 Lyon 12
WS Correlation graph of Free WS vs Anemometer Sensor WS (CFD & Field)
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
0 2 4 6 8 10 12 14 16
Freestream WindSpeed (m/s)
An
em
om
ete
r S
en
so
r W
ind
Sp
ee
d (
m/s
)
Anemometer_Right-CFD
Anemometer_Left-CFD
Anemometer_Right-Field
Anemometer_Left-Field
Wind speeds Actuator disc Actuator line Field data
4 0.998 0.982 1.010
6 1.024 - 1.105
8 1.018 1.025 1.036
10 1.021 1.037 1.025
12 1.024 1.032 1.052
14 1.015 - -
16 1.009 1.008 -
Some encouraging
results but high
variability from site to
site and operator to
operator. Not ready for
field testing or
standardisation
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
Advanced techniques: Spinner anemometry
EWEA presentation July 2012 Lyon 13
• Site calibration done
• Turbine running with spinner anemometer for half a
year
• Availability 51% (100% of the data) per 10-min data
set, 97% available (99% of the data per 10-min data
set)
• Correlation to free stream wind has R2 of 0.89, which
is less than standard anemometer (R2 = 0.97)
• Correlation to free stream turbulence is equally bad
between standard anemometer and spinner
anemometer
• More data requirement for spinner anemometery to
establish itself as a valuable option
Add presentation information via
View/Header and Footer
To add pre-formatted bullets please
use the increase/decrease indent
buttons found in the PowerPoint menu
Limitations and Conclusions
EWEA presentation July 2012 Lyon 14
In order to get value out of nacelle anemometry data we
have to overcome these limitations:
• Data quality currently lowers the capability of the analysis
– we are looking with ‘foggy glasses’ and results are not
clear
• Main challenge of understanding the physics through the
available data – data must be used to verify hypotheses,
not only to postulate problems
• Data must be used together with other sources (other
turbines, met-masts, other signals, logbooks
While addressing these challenges, we can identify and solve
a number of problems with park operation and add value by
optimising park performance
Title slide/end slide image dimensions:
Title slide images must always fit this size:
Height: 10.6 cm; Width: 25.4 cm
Title slide images must always follow this position:
Horizontal: 0 cm; Vertical: 0 cm
To change title slide/end slide image:
Contact Communication Support
Tip:
Vestas drawing guides will help you position and
crop images and objects. Images and objects will
snap to drawing guides when repositioned or
cropped.
To add drawing guides:
• Right-click on next to slide
• Select ‘Grid and Guides…’
• Check ‘Display drawing guides on screen’
• Press ‘OK’
Thank you for your attention
Recommended