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Semi-empirical high-field conduction model for polyethylene and implications thereof

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1 Author(s)
Boggs, S.A. ; Dept. of Electr. Eng., Toronto Univ., Ont., Canada

A semi-empirical model for high-field conduction in polyethylene is developed on the basis of data in the literature for ac conductivity in the range of 30 to 60 kV/mm and `charge injection' from a needle in the range of 160 kV/mm. The model is used to compute high-field conduction-related phenomena by solving Poisson's equation with field-dependent conductivity and time-dependent applied voltage for a highly inhomogeneous field geometry. Parameters computed include field, current density, charge density, power density, and force density. Temperature rise in the dielectric is estimated based on the computed power density

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:2 ,  Issue: 1 )