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- Title
Application of Acoustic Signals for Rectifier Fault Detection in Brushless Synchronous Generator.
- Authors
RAHNAMA, Mehdi; VAHEDI?, Abolfazl
- Abstract
One of the most important issues that power companies face when trying to reduce time and cost maintenance is condition monitoring. In electricity market worldwide, a significant amount of electrical energy is produced by synchronous machines. One type of these machines is brushless synchronous generators in which the rectifier bridge is mounted on rotating shafts. Since bridge terminals are not accessible in this type of generators, it is difficult to detect the possible faults on the rectifier bridge. Therefore, in this paper, a method is proposed to facilitate the rectifier fault detection. The proposed method is then evaluated by applying two conventional kinds of faults on rectifier bridges including one diode open-circuit and two diode open-circuit (one phase open-circuit of the armature winding in the auxiliary generator in experimental set). To extract suitable features for fault detection, the wavelet transform has been used on recorded audio signals. For classifying faulty and healthy states, K-Nearest Neighbours (KNN) supervised classification method was used. The results show a good accuracy of the proposed method.
- Subjects
FAULT indicators (Electricity); SYNCHRONOUS generators; BRUSHLESS electric motors; ACOUSTIC signal processing; COST control
- Publication
Archives of Acoustics, 2019, Vol 44, Issue 2, p267
- ISSN
0137-5075
- Publication type
Article
- DOI
10.24425/aoa.2019.128490