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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

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Page 1: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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

Page 2: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

European Union has set a

20% renewable energy target for 2020

Page 3: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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

Page 4: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Offshore wind is generally 8 m/s higher at European

coastal waters compared to those onshore

Page 5: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Exploitation

expensive

Page 6: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 7: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Operation & maintenance actions take ± 30% of the

total production cost of offshore electricity in wind farms

Page 8: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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

Page 9: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 10: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

Downtime caused by turbine subsystems

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 11: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 12: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 13: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Hot spot temperature profiles

for healthy and faulty bearing

Non-contact

Non-intrusive

Not disrupting operation

Page 14: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 15: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

NF

NF-IM

MRL

MRL-IM

HRL

HRL-IM

ORF

ORF-IM

Page 16: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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

Page 17: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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

Page 18: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Random Decision

Forest Classification

Page 19: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 20: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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

Page 21: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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%

Page 22: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

AITA 2015 – Sofie Van Hoecke - 02/10/2015

Page 23: Towards thermal imaging based condition monitoring in ...€¦ · Towards thermal imaging based condition monitoring in offshore wind turbines Sofie Van Hoecke, Olivier Janssens,

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