Towards thermal imaging based condition
monitoring in offshore wind turbines
Sofie Van Hoecke, Olivier Janssens, Raiko Schulz,
Kurt Stockman, Mia Loccufier , Rik Van de Walle
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
European Union has set a
20% renewable energy target for 2020
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Three possible growth scenarios for
wind energy towards 2020
Increase in installed wind turbine
capacity of 41%, 64%, or 85%
respectively compared to 2013
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Offshore wind is generally 8 m/s higher at European
coastal waters compared to those onshore
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Exploitation
expensive
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Operation & maintenance actions take ± 30% of the
total production cost of offshore electricity in wind farms
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Reducing O&M-costs by the use of
new and more advanced
condition monitoring techniques
VIS-Project OWOME
Offshore Wind Operations & Maintenance Excellence
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Downtime caused by turbine subsystems
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Hot spot temperature profiles
for healthy and faulty bearing
Non-contact
Non-intrusive
Not disrupting operation
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
NF
NF-IM
MRL
MRL-IM
HRL
HRL-IM
ORF
ORF-IM
AITA 2015 – Sofie Van Hoecke - 02/10/2015
IR video
Preprocessing
Feature extraction
Classification
Preprocessing
Feature extraction
Classification
Healthy bearing
Mildly inadequately lubricated bearing
Outer raceway
Imbalance (-IM)
Balance
Extremely inadequately lubricated bearing P
ipelin
e 1
Pip
eline 2
AITA 2015 – Sofie Van Hoecke - 02/10/2015
IR video
Preprocessing
Feature extraction
Classification
Preprocessing
Feature extraction
Classification
Healthy bearing
Mildly inadequately lubricated bearing
Outer raceway
Imbalance (-IM)
Balance
Extremely inadequately lubricated bearing P
ipelin
e 1
Pip
eline 2
AITA 2015 – Sofie Van Hoecke - 02/10/2015
Random Decision
Forest Classification
AITA 2015 – Sofie Van Hoecke - 02/10/2015
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
NF
NF-IM
MRL
MRL-IM
HRL
HRL-IM
ORF
ORF-IM
Be
arin
g 1
Be
arin
g 2
Be
arin
g 3
Be
arin
g 4
Be
arin
g 5
40 recordings (5 bearings * 8 faults/conditions)
1 hour video per recording
Corrected for ambient temperature
Leave-one-bearing-out cross validation
AITA 2015 – Sofie Van Hoecke - 02/10/2015
AITA 2015 – Sofie Van Hoecke - 02/10/2015
IR video
Preprocessing
Feature extraction
Classification
Preprocessing
Feature extraction
Classification
Healthy bearing
Mildly inadequately lubricated bearing
Outer raceway
Imbalance (-IM)
Balance
Extremely inadequately lubricated bearing P
ipelin
e 1
Pip
eline 2
100% (+/- 0%)
87.5% (+/- 1.12%)
Overall accuracy: 87.5%
AITA 2015 – Sofie Van Hoecke - 02/10/2015
prof. dr. ir. Sofie Van Hoecke
Universiteit Gent - iMinds
Tel. +32 9 3314958 | Fax +32 9 3314896 | GSM +32 486 569609
Dept. of Electronics and Information Systems | Multimedia Lab
http://be.linkedin.com/in/svhoecke
AITA 2015 – Sofie Van Hoecke - 02/10/2015