论文信息 - A deterministic model for branched structures in the electrical breakdown of solid polymeric dielectrics

A deterministic model for branched structures in the electrical breakdown of solid polymeric dielectrics

We present a completely deterministic model for the electrical-tree breakdown mechanism in solids, and show that it is capable of generating branched structures even when the polymer is assumed to be homogeneous. The model is non-linear in the local electric fields and contains feedback features. These generate deterministic chaos in the discharges driving the breakdown, such as have been observed in laboratory experiments. It is surmised that it is this chaotic behaviour which is responsible for the branching.

[1] Yoshimichi Ohki,et al. Effects of crystallinity and electron mean-free-path on dielectric strength of low-density polyethylene , 1991 .

[2] H. Zeller,et al. Electrofracture mechanics of dielectric aging , 1984 .

[3] L. A. Dissado,et al. Propagation of electrical tree structures in solid polymeric insulation , 1997 .

[4] J. V. Champion,et al. Systematic and reproducible partial discharge patterns during electrical tree growth in an epoxy resin , 1996 .

[5] Sweeney,et al. Physical model for breakdown structures in solid dielectrics. , 1993, Physical review. B, Condensed matter.

[6] Champion,et al. Evidence for deterministic chaos as the origin of electrical tree breakdown structures in polymeric insulation. , 1995, Physical review. B, Condensed matter.

[7] John C. Fothergill,et al. Electrical degradation and breakdown in polymers , 1992 .

[8] John C. Fothergill,et al. A discharge-avalanche theory for the propagation of electrical trees. A physical basis for their vol , 1994 .

[9] L. Pietronero,et al. From physical dielectric breakdown to the stochastic fractal model , 1988 .

[10] P. Tiberto,et al. Magnetic properties and giant magnetoresistance in magnetic granular CoxCu100-x alloys , 1995 .

[11] L. Pietronero,et al. Fractal Dimension of Dielectric Breakdown , 1984 .

[12] G. Stevens,et al. Stochastic modelling of electrical treeing: fractal and statistical characteristics , 1990 .