Modified optical fiber sensor for PD detection in high-voltage power equipment
- Univ. of New South Wales, Sydney, New South Wales (Australia)
Detection of electrical partial discharges (PDs) inside power transformers is a good indicator of the quality of the insulation system. Ultrasonic pressure waves are produced by partial discharges and can be detected with suitable pressure transducers. The sensitivity of the externally mounted sensors is reduced due to signal attenuation and multiple paths. Advances in optical fiber technology enable more accurate measurements even in hostile environments with a high background noise level. An all-optical fiber sensor system is investigated as an alternative which can be safely immersed inside the transformer. The perturbation caused by pressure wave induces stress on the fiber core and affects the light beam traversing the fiber. By using interferometric techniques the optical phase shift caused by the perturbation can be detected accurately with a phase-modulated type optical sensor.
- OSTI ID:
- 524651
- Report Number(s):
- CONF-960614-; ISBN 0-7803-3531-7; TRN: IM9740%%125
- Resource Relation:
- Conference: 1996 IEEE international symposium on electrical insulation, Montreal (Canada), 16-19 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of Conference record of the 1996 IEEE international symposium on electrical insulation. Volume 1; PB: 475 p.
- Country of Publication:
- United States
- Language:
- English
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