Effect of traps on surface flashover of XLPE in vacuum

In the present paper, we study the effect of trap depth for shallow traps on the surface flashover performance in vacuum; that is on deepening the trap depth, the flashover performance is firstly enhanced and then weakened, only when the trap depth changes in the certain range, the best surface flas...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2010-06, Vol.17 (3), p.964-970
Main Authors: Li, Shengtao, Huang, Qifeng, Sun, Jian, Zhang, Tuo, Li, Jianying
Format: Article
Language:English
Subjects:
Agglomeration
Aggregation structure
Annealing
Cross-linked polyethylene
Dielectric devices
Dielectrics and electrical insulation
Electric potential
Electrical insulation
Flashover
Grain size
Heat treatment
Polyethylene
Rough surfaces
Surface flashover
Surface flashover in vacuum
Surface roughness
Surface treatment
trap
Voltage
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the present paper, we study the effect of trap depth for shallow traps on the surface flashover performance in vacuum; that is on deepening the trap depth, the flashover performance is firstly enhanced and then weakened, only when the trap depth changes in the certain range, the best surface flashover performance in vacuum is exhibited. Further to a previous study, we extensively study wide range of trap depths by changing the aggregation structure of semi-crystalline cross-linked polyethylene (XLPE). In the present study, we firstly annealed the XLPE at 135°C for 10 minutes then cooled it at different conditions to get samples with different trap depths. We found that the trap depth deepened on increasing the grain size. Furthermore, we found that the flashover performances of the samples (Cooled at a rate of 0.5°C /min) were enhanced by 76% and 19%, respectively under dc and impulse voltage. These results demonstrate heat-treatment as an effective way to enhance the flashover performance in vacuum for the semi-crystalline polymers.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2010.5492273