An important issue affecting the sustainability of power transformers is systematic and progressive deterioration of the insulation system by the action of partial discharge. Ideally, it is appropriate to use on line, non-destructive techniques for detection and diagnosis of failures related to insulation systems, in order to determine whether preventive maintenance action is required. Thus, huge material losses can be saved (spared), while improving reliability and system availability.
Based on a new generation of piezoelectric sensors (High Temperature Ultrasonic Transducers HTUTs), recently developed by the Industrial Materials Institute (IMI) in Boucherville (Qc, Canada) and offers very interesting features (broad band frequency response, flexible, miniature, economic, etc..), we propose in this thesis an investigation on the applicability of this technology to the problematic of partial discharges.
This work presents an analysis of the metrological performance of these sensors and demonstrated empirically the consistency of their measures. It outlines the results of validation from a comparative study with the measures of a standard detection circuit. In addition, it also presents the potential of these sensors to locate partial discharge source position by acoustic emission.
| Date | 14 Sept 2012 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Antoine Tahan (Supervisor) & Éric David (Co-supervisor) |
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Danouj, B. (Author),
Tahan (Supervisor) &
David (Co-supervisor),
14 Sept 2012Student thesis: Doctoral thesis › Doctorate in Engineering: Engineering