Chen, G. (2003) Space Charge Effect on the Impulse Breakdown of Low Desnity Polyethylene. In: The 2nd International Conference on Insulation Condition Monitoring of Electrical Plant, October 27-30, 2003, Chongqing, China. pp. 133-136.
Full text not available from this repository.
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.
| Creators: | G Chen |
|---|---|
| Item Type: | Conference or Workshop Item |
| Keywords: | Impulse breakdown, space charge, low-density polyethylene |
| Research Group: | Electrical Power Engineering Electrical Power Engineering > High Voltage Laboratory |
| Deposited On: | 10 Nov 2003 by Chen, George |
| ISBN: | 7-900371-56-7 |
| ID Code: | 8515 |
| Last Modified: | 11 Nov 2009 12:16 |
| Performance Indicator: | EZ~01~01~04 |
| Citations: | Google Scholar: 2 |
Tools
Metadata
Corrections
ECS staff and postgraduates may modify this record
