Abstract
In industry, there have been several documented failures on the lower (oil side) region of high voltage power transformer bushings. In these cases, the failure mode was considered to be due to localised discharges, as a result of
accumulated surface contaminants. Given failure is often catastrophic, it is therefore difficult to establish the exact point of failure. In this paper, a numerical model that simulates the electric field and equipotential distributions for an oil
impregnated paper bushing with contaminants on the lower porcelain surface is presented.
accumulated surface contaminants. Given failure is often catastrophic, it is therefore difficult to establish the exact point of failure. In this paper, a numerical model that simulates the electric field and equipotential distributions for an oil
impregnated paper bushing with contaminants on the lower porcelain surface is presented.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 2011 Electrical Insulation and Dielectric Phenomena Conference (CEIDP 2011) |
| Publisher | IEEE |
| Pages | 555-558 |
| Number of pages | 4 |
| ISBN (Print) | 9781457709852 |
| DOIs | |
| Publication status | Published - 2011 |
Keywords
- porcelian insulators
- electric fields
- surface contamination
- conductivity