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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

  • 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

    ip elin

    e 1

    P ip

    elin e 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

    ip elin

    e 1

    P ip

    elin e 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

    B e

    a ri n

    g 1

    B e

    a ri n

    g 2

    B e

    a ri n

    g 3

    B e

    a ri n

    g 4

    B e

    a ri n

    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

    ip elin

    e 1

    P ip

    elin e 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