Aspects of structural health and condition monitoring of offshore wind turbines
Philosophical Transactions A: Mathematical, Physical and Engineering Sciences
© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Wind power has expanded significantly over the past years, although reliability of wind turbine systems, especially of offshore wind turbines, has been many times unsatisfactory in the past. Wind turbine failures are equivalent to crucial financial losses. Therefore, creating and applying strategies that improve the reliability of their components is important for a successful implementation of such systems. Structural health monitoring (SHM) addresses these problems through the monitoring of parameters indicative of the state of the structure examined. Condition monitoring (CM), on the other hand, can be seen as a specialized area of the SHM community that aims at damage detection of, particularly, rotating machinery. The paper is divided into two parts: in the first part, advanced signal processing and machine learning methods are discussed for SHM and CM on wind turbine gearbox and blade damage detection examples. In the second part, an initial exploration of supervisor control and data acquisition systems data of an offshore wind farm is presented, and data-driven approaches are proposed for detecting abnormal behaviour of wind turbines. It is shown that the advanced signal processing methods discussed are effective and that it is important to adopt these SHM strategies in the wind energy sector.
The support of the UK Engineering and Physical Sciences Research Council (EPSRC) through grant reference nos. EP/J016942/1 and EP/K003836/2 is greatly acknowledged. The authors also acknowledge EC Grupa and Prof. Wieslaw Staszewski and Dr Tomasz Barszcz for providing the wind turbine gearbox data and their help in the condition monitoring research of this paper. The authors would like to thank C. R. Farrar, K. Farinholt, S. G. Taylor from LANL, USA, M. Choi from the Chonbuk National University, Korea, and G. Park from Chonnam National University, Korea, and LANL, USA, for their support and guidance on the study of the blades experimental research.
This is the final version of the article. Available from the publisher via the DOI in this record
Vol. 373: 20140075
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