Title :
Thermal stability of a defect-tolerant dielectric
Author :
Boggs, Steven A.
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont., Canada
fDate :
7/1/1994 12:00:00 AM
Abstract :
This paper investigates the power frequency, highly inhomogeneous field properties of a dielectric for which the conductivity is an exponential function of the electric field. Oil-paper constitutes the best known example of such a system. Based on solutions to Poisson´s equation with field-dependent conductivity and time-dependent voltage, the paper concludes that such a dielectric could be defect-tolerant (electrically and thermally stable in spite of a defect) for reasonable defects geometries
Keywords :
composite insulating materials; dielectric properties of solids; electric fields; electrical conductivity of solids; paper; thermal analysis; Poisson´s equation; conductivity; defect-tolerant dielectric; defects geometries; electric field; electric stability; field-dependent conductivity; floating stress enhancement; highly inhomogeneous field; oil-paper; power frequency field; thermal stability; time-dependent voltage; Dielectric losses; Electrodes; Materials science and technology; Poisson equations; Solids; Stress; Thermal conductivity; Thermal engineering; Thermal stability; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
