Speed-based diagnostics of aerodynamic and mass imbalance in large wind turbines

Shahriar, Md Rifat, Borghesani, Pietro, & Tan, Andy C.C. (2015) Speed-based diagnostics of aerodynamic and mass imbalance in large wind turbines. In IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM 2015), 7-11 July 2015, Busan; South Korea.

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Any kind of imbalance in the operation of a wind turbine has adverse effect on the downstream torsional components as well as tower structure. It is crucial to detect imbalance at its very inception. The identification of the type of imbalance is also required so that appropriate measures of fault accommodation can be performed in the control system. In particular, it is important to distinguish between mass and aerodynamic imbalance. While the former is gradually caused by a structural anomaly (e.g. ice deposition, moisture accumulation inside blade), the latter is generally associated to a fault in the pitch control system. This paper proposes a technique for the detection and identification of imbalance fault in large scale wind turbines. Unlike most other existing method it requires only the rotor speed signal which is readily available in existing turbines. Signature frequencies have been proposed in this work to identify imbalance type based on their physical phenomenology. The performance of this technique has been evaluated by simulations using an existing benchmark model. The effectiveness of the proposed method has been confirmed by the simulation results.

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ID Code: 87671
Item Type: Conference Paper
Refereed: Yes
Keywords: condition monitoring, wind turbine, fault diagnosis, aerodynamic imbalance, mass imbalance, speed-based diagnostics
DOI: 10.1109/AIM.2015.7222635
ISBN: 9781467391078
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 IEEE
Copyright Statement: Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Deposited On: 23 Sep 2015 22:50
Last Modified: 18 Mar 2016 19:40

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