Physics of Failure approach to wind turbine condition based maintenance
Article first published online: 3 AUG 2009
Copyright © 2009 John Wiley & Sons, Ltd.
Volume 13, Issue 5, pages 395–405, July 2010
How to Cite
Gray, C. S. and Watson, S. J. (2010), Physics of Failure approach to wind turbine condition based maintenance. Wind Energ., 13: 395–405. doi: 10.1002/we.360
- Issue published online: 16 JUL 2010
- Article first published online: 3 AUG 2009
- Manuscript Accepted: 1 JUL 2009
- Manuscript Revised: 19 MAY 2009
- Manuscript Received: 5 MAR 2009
- physics of failure;
- wind turbine;
- damage calculation;
- condition monitoring
Wind turbine condition monitoring systems provide an early indication of component damage, allowing the operator to plan system repair prior to complete failure. However, the resulting cost savings are limited because of the relatively low number of failures that may be detected and the high cost of installing the required measurement equipment. A new approach is proposed for continuous, online calculation of damage accumulation using standard turbine performance parameters and Physics of Failure methodology. The wind turbine system is assessed in order to identify the root cause of critical failure modes and theoretical damage models are developed to describe the relationship between the turbine operating environment, applied loads and the rate at which damage accumulates. Accurate estimates may then be made in real time concerning the probability of failure for specific failure modes and components. The methodology is illustrated for a specific failure mode using a case study of a large wind farm where a significant number of gearbox failures occurred within a short space of time. Such an approach may be implemented at relatively low cost and offers potential for significant improvements in overall wind turbine maintenance strategy. Copyright © 2009 John Wiley & Sons, Ltd.