Title :
Charge accumulation characteristics in XLPE with heat treated semiconductive electrodes
Author :
Suh, Kwang S. ; Kim, EunJoo ; Han, Min-Koo ; Takada, Tatsuo
Author_Institution :
Dept. of Mater. Sci., Korea Univ., Seoul, South Korea
Abstract :
The characteristics of charge accumulation in XLPE (cross-linked polyethylene) with heat-treated semiconductive electrodes are investigated. Both fresh ones and vacuum degassed electrodes are used. Vacuum treatment reduces the amount of residual by-products of the crosslinking reaction, which helps the buildup of homocharges near the electrodes. This indicates that the heterocharge peak observed in XLPE is caused by such by-products. In addition, the negative charges are observed near both electrodes when the charge profiles are collected during the voltage application, whereas the heterocharges are observed when the charge profiles are collected after the removal of voltage. The observation of negative charges near both electrodes is attributed to the strong contribution of injected electrons near the cathode
Keywords :
cable insulation; dielectric phenomena; electric charge; organic insulating materials; polymers; XLPE; charge accumulation; charge profiles; cross-linked polyethylene; crosslinking; heat treated semiconductive electrodes; heterocharge peak; homocharges; injected electrons; negative charges; power cables; residual by-products; vacuum degassed electrodes; Cable insulation; Cable shielding; Conductors; Electrodes; Medium voltage; Power cables; Pulse measurements; Semiconductor films; Semiconductor materials; Vacuum systems;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1992., Proceedings of the 4th International Conference on
Conference_Location :
Sestri Levante
Print_ISBN :
0-7803-0129-3
DOI :
10.1109/ICSD.1992.225003
