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PD Defect Monitoring for Oil-Impregnated Paper Bushing by Measuring the Inner Pressure
- Source :
- IEEE Access, Vol 7, Pp 53411-53418 (2019)
- Publication Year :
- 2019
- Publisher :
- IEEE, 2019.
-
Abstract
- When the inner insulation of oil-impregnated paper bushing breaks down in service, gases decomposed by oil and paper may cause an explosion. The explosion of bushing occurs from time to time because of the lack of an effective monitoring method. In order to provide an effective online monitoring method for the bushing to avoid explosion, this paper presents a method to monitor the PD defect in bushing by measuring the inner pressure of bushing. In this paper, the relationship of variation between characteristic gases content and inner pressure is studied, the effect of inner temperature on inner pressure is analyzed and the method for reducing this effect is also presented, and the monitoring method is proved to be useful by PD tests on a real bushing. The results show that the inner pressure increases obviously due to the generation of characteristic gases by internal discharge in oil-impregnated paper bushing, and the pressure increases with the deterioration of the discharge; although the inner pressure has a great influence on the inner pressure, the influence can be reduced or eliminated greatly by the method of common-mode rejection. According to the results, the internal discharge defect of the oil-impregnated paper bushing can be detected by monitoring the pressure, and the bushing explosion can be avoided.
- Subjects :
- 010302 applied physics
Materials science
General Computer Science
Inner pressure
fault warning
0211 other engineering and technologies
General Engineering
02 engineering and technology
on-line monitoring
01 natural sciences
Temperature measurement
humanities
inner pressure
Bushing
0103 physical sciences
discharge defect
General Materials Science
021108 energy
Monitoring methods
lcsh:Electrical engineering. Electronics. Nuclear engineering
Composite material
Oil-impregnated paper bushing
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 21693536
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....27e1b0ad8a472f7d59a1749c80233a2e