Title :
Tree initiation mechanisms
Author :
Tanaka, Toshikatsu
Author_Institution :
Central Res. Inst. of Electr. Power Ind., Tokyo, Japan
Abstract :
Tree initiation mechanisms are described mainly for polyethylene. The importance of V-t characteristics is emphasized for tree initiation studies, since processes may be different for different voltages and times. Not only morphological aspects, but also space-charge effects are accentuated. The V-t characteristics for tree initiation are explained in terms of electric-field-induced degradation of polymers and space-charge accumulation. A space-charge-oriented model is demonstrated for tree initiation, which includes submodels to explain many associated phenomena
Keywords :
electric breakdown of solids; organic insulating materials; polymers; space charge; electric-field-induced degradation; morphological aspects; polyethylene; space-charge accumulation; space-charge effects; space-charge-oriented model; submodels; tree initiation studies; voltage-time characteristics; Cable insulation; Dielectric breakdown; Dielectrics and electrical insulation; Manufacturing; Partial discharges; Polyethylene; Power transmission; Stress; Trees - insulation; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172345
