Space Charge Effect on the Impulse Breakdown of Low Desnity Polyethylene
Chen, G (2003) Space Charge Effect on the Impulse Breakdown of Low Desnity Polyethylene. At The 2nd International Conference on Insulation Condition Monitoring of Electrical Plant, Chongqing, China, 27 - 30 Oct 2003. Sichun Publishing House of Science & Technology, 133-136.
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Description/Abstract
Polymeric materials employed in the power transmission system may be subjected to transient voltages resulting from lighting strokes or switching surges. The rise time of these transient voltages varies in a large range from a fraction of microsecond to several hundred microseconds. The breakdown often occurs during the transient overvoltage. In the present report the breakdown stress of low density polyethylene subjected to impulse with different rise times has been measured. Single impulse was employed in order to reduce space charge ageing effect. It has been found that the breakdown stress increases with the rise time initially and becomes stable when the rise time reaches to 350μs. However, DC breakdown strength is slightly lower than the stable value obtained from the impulse. The results indicate that the space charge plays a very important role in the breakdown. The presence of space charge has been confirmed by the direct measurements of the space charge in the bulk using the pulsed electroacoustic method.
| Item Type: | Conference or Workshop Item (Speech) |
|---|---|
| Additional Information: | Event Dates: October 27-30, 2003 |
| ISBNs: | 7900371567 |
| Keywords: | Impulse breakdown, space charge, low-density polyethylene |
| Divisions: | Faculty of Physical and Applied Science > Electronics and Computer Science Faculty of Physical and Applied Science > Electronics and Computer Science > EEE |
| Item ID: | 258515 |
| Date Deposited: | 10 Nov 2003 |
| Last Modified: | 01 Mar 2012 10:56 |
| Contributors: | Chen, G (Author) |
| Date: | 2003 |
| Additional Information: | Event Dates: October 27-30, 2003 |
| Status: | Published |
| Publisher: | Sichun Publishing House of Science & Technology |
| Further Information: | Google Scholar |
| URI: | http://eprints.soton.ac.uk/id/eprint/258515 |
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