Static electrification in large power transformers
Static electrification due to dielectric liquid flow has been found to be the cause of many field failures in the large forced-oil-cooled power transformers and in compact HVDC substations. The accumulation of static charge in the oil and isolated solid insulating surfaces causes the electric potent...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2009
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| Online Access: | http://hdl.handle.net/10356/19729 |
| _version_ | 1811678876253814784 |
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| author | Zhang, Jian |
| author2 | Cao, Long Jian |
| author_facet | Cao, Long Jian Zhang, Jian |
| author_sort | Zhang, Jian |
| collection | NTU |
| description | Static electrification due to dielectric liquid flow has been found to be the cause of many field failures in the large forced-oil-cooled power transformers and in compact HVDC substations. The accumulation of static charge in the oil and isolated solid insulating surfaces causes the electric potential to rise in the same fashion as a Van de Graff generator. The potential builds up until either the rate of charge accumulation equals to the rate of charge leakage, or spark discharges occur. Though the problems of flow electrification were well recognized in petroleum industry, the charging mechanism and effect on transformer insulation and operation are still under active investigation. |
| first_indexed | 2024-10-01T03:00:13Z |
| format | Thesis |
| id | ntu-10356/19729 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:00:13Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/197292023-07-04T15:22:57Z Static electrification in large power transformers Zhang, Jian Cao, Long Jian School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Electric power Static electrification due to dielectric liquid flow has been found to be the cause of many field failures in the large forced-oil-cooled power transformers and in compact HVDC substations. The accumulation of static charge in the oil and isolated solid insulating surfaces causes the electric potential to rise in the same fashion as a Van de Graff generator. The potential builds up until either the rate of charge accumulation equals to the rate of charge leakage, or spark discharges occur. Though the problems of flow electrification were well recognized in petroleum industry, the charging mechanism and effect on transformer insulation and operation are still under active investigation. Master of Engineering 2009-12-14T06:31:50Z 2009-12-14T06:31:50Z 1996 1996 Thesis http://hdl.handle.net/10356/19729 en Nanyang Technological University 121 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Electric power Zhang, Jian Static electrification in large power transformers |
| title | Static electrification in large power transformers |
| title_full | Static electrification in large power transformers |
| title_fullStr | Static electrification in large power transformers |
| title_full_unstemmed | Static electrification in large power transformers |
| title_short | Static electrification in large power transformers |
| title_sort | static electrification in large power transformers |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Electric power |
| url | http://hdl.handle.net/10356/19729 |
| work_keys_str_mv | AT zhangjian staticelectrificationinlargepowertransformers |