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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ma Zhenli Cheng Yangchun Chen Ming Wei Jinqing Li Chengrong |
| Copyright Year | 2013 |
| Description | Author affiliation: Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Beijing, China (Ma Zhenli; Cheng Yangchun; Chen Ming; Wei Jinqing; Li Chengrong) |
| Abstract | Partial discharge (PD) in oil-paper insulation of transformer is considered to be a serious fault condition. The movement of excessive charge over pressboard may result in mechanical and chemical damage to material through thermal and electronic action. With the development of PD, gases, white marks and tracks appeared. To research the relationship among the gases white marks and carbonized tracks, a needle-plate electrode configuration was set in laboratory. Pressboards with grooves of varying depths were made to release the gases. And all the pressboards were dissected layer by layer so as to observe carbonized tracks inside the pressboard. Besides, the phenomena of gases, white marks and tracks were recorded by taking photos. The experiment showed that: with the development of PD, carbonized tracks appeared on the pressboards. And as the decomposition of the insulation oil and pressboards, a large amount of gases were generated and overflowed through the pressboard pores, then white marks were formed; Moreover, due to the existence of residual gases, the surface of pressboard was raised where PD happened; As the gases loosed and even broke the pressboards' structure, PD took place more easily. As a result, carbonized tracks grew to be more. |
| Starting Page | 967 |
| Ending Page | 970 |
| File Size | 968562 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781479908073 |
| ISSN | 15535282 |
| e-ISBN | 9781467344616 |
| DOI | 10.1109/ICSD.2013.6619886 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-06-30 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Gases Partial discharges Insulation life Degradation Discharges (electric) Oil insulation trackings partial discharge oil-paper insulation |
| Content Type | Text |
| Resource Type | Article |
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