Title :
Thermo-electric field distribution around a defect in polyethylene [power cable insulation]
Author :
Kuang, Jinbo ; Boggs, Steven A.
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont., Canada
Abstract :
In the presence of a stress enhancement, a lightning surge causes space charge formation and power dissipation which can result in substantial temperature rise in power cable dielectric materials. Poisson´s equation and the thermal diffusion equation have been solved in 2D with field-dependent material parameters to compute temperature rises of nearly 60 K during a 10 ns risetime surge which produces a background field of 40 kV/mm applied to a 300 μm protrusion with a 2.5 μm tip radius
Keywords :
electric breakdown; electric fields; polyethylene insulation; power cable insulation; power cables; space charge; temperature distribution; thermal analysis; thermal diffusion; 10 ns; 2.5 mum; 300 mum; Poisson´s equation; dielectric materials; lightning surge; polyethylene power cable insulation; power dissipation; space charge formation; temperature rise; thermal diffusion equation; thermo-electric field distribution; Dielectric materials; Lightning; Poisson equations; Polyethylene; Power cables; Power dissipation; Space charge; Surges; Temperature; Thermal stresses;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549311
