Cold Climate Experiences in Stor

Cold Climate Experiences in Stor-Rotliden
Daniel Gustafsson, Måns Håkansson
Kalle Blomberg, Jan-Åke Dahlberg, Peter Krohn, Sven-Erik Thor
Confidentiality class: Medium (C2)
Cold Climate Experiences in Stor-Rotliden
Confidentiality class: None (C1)
Basics
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Installed capacity 78MW
Number of turbines 40
Supplier Vestas V90 1.8 (11) and 2.0 MW (29)
Expected annual production 229 GWh
Investment cost 1.5bSEK
Building and Construction spring 2009 to fall 2010
Last machine was grid connected November 16th
Located in Åsele Community
• No de/anti icing equipment
• Equipment to detect vibrations
• Ice sensors will be mounted
Confidentiality class: None (C1)
Location
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Google Earth
Confidentiality class: None (C1)
Details
Confidentiality class: None (C1)
Confidentiality class: None (C1)
Confidentiality class: None (C1)
Confidentiality class: None (C1)
Icing event 2010
Confidentiality class: None (C1)
How do we detect ice
• Several ice sensors in the met mast
• Holooptics icing rate sensors will be installed on six nacelles, during
2011
• Vibration sensors have trigged a number of automatic stops
• Power curve deterioration observed at several locations
Confidentiality class: None (C1)
Ice Measurements started 2009 (on-going)
IceMonitor
Confidentiality class: None (C1)
Holooptics
Sensors in mast
Confidentiality class: None (C1)
Challenge to analyze icing situations
[ °C,
m/s ]
20
[g]
Stor-Rotliden
15
8000
7000
Temp mastfot °C
Wind speed m/s
T26 accu
IceMonitor g
10
6000
5
5000
0
4000
-5
3000
-10
2000
-15
1000
-20
0
2009-11-01
00:00
Confidentiality class: None (C1)
2009-11-04
00:00
2009-11-07
00:00
2009-11-10
00:00
2009-11-13
00:00
2009-11-16
00:00
2009-11-19
00:00
2009-11-22
00:00
2009-11-25
00:00
.
Ice measurement data 2010
Stor Rotliden
[ °C,
m/s]
[g]
4000
20
Temp mastfot °C
Wind speed m/s
IceMonitor g
15
3500
10
3000
5
2500
0
2000
-5
1500
-10
1000
-15
500
-20
0
2010-11-11
00:00
2010-11-15
00:00
2010-11-19
00:00
2010-11-23
00:00
2010-11-27
00:00
2010-12-01
00:00
2010-12-05
00:00
.
Confidentiality class: None (C1)
Anemometers at nacelle
Confidentiality class: None (C1)
Anemometers at nacelle
Confidentiality class: None (C1)
Additional measurements 2011 partly financed by Vindforsk
• Title ”Icing – complementary work to V-313”
• Application near approval
• Sensors:
-
Three NRG
Labkotec
Goodrich
Camera
Confidentiality class: None (C1)
Assessment of power performance in Stor-rotliden
Confidentiality class: None (C1)
Stand still in % of total time
Stand still in % of total time
12
10
Total stand still
8
%
Possible ice occurence
6
4
2
0
October
November
December
Disclaimer:
These results were obtained when the wind farm was in commissioning phase and may
not be representative for ”real life” operation
Confidentiality class: None (C1)
Energy losses due to stand stills
Energy losses in % of total production (stops only)
12,0
Total Losses
Due to ice?
%
8,0
4,0
0,0
October
November
December
Disclaimer:
These results were obtained when the wind farm was in commissioning phase and may
not be representative for ”real life” operation
Confidentiality class: None (C1)
Performance of C11 using the mast anemometer
2200
2000
1800
1600
Power kW
1400
1200
Below zero
Above zero
1000
800
600
400
200
0
-200
0
Confidentiality class: None (C1)
2
4
6
8
10
12
Wind Speed (Mast 60m x 1.15)
14
16
18
An example of performance in CC
2200
2000
1800
1600
Power kW
1400
1200
WP-Level 0 - Mode 0 - 07-2009
> 0, Median (Mast)
< 0, Median (Mast)
1000
800
600
400
200
0
-200
0
2
4
6
8
10
12
Wind Speed (Mast 60m x 1.15)
Confidentiality class: None (C1)
14
16
18
Discussion and conclusions
Preliminary results
- Data from commissioning period
- Only part of a winter season analyzed
- Fairly simple analysis methodology
- Data quality to some extent questionable
Conclusion
- Significant production losses…
- Further analysis are to be carried out after this
winter season
Invitation to co-operation
- Open to all suggestions for information and data
exchange
Confidentiality class: None (C1)