The statistics of electrical tree inception

A theoretical model is proposed to explain the statistics of electrical tree inception based on the geometry of the initiating electrode and the field variation around its surface. Numerical calculations show that the model is sufficient to describe qualitatively the observed features of both the time to inception distribution and the distribution of inception voltages (fields) obtained in ramp experiments. The implications of the model for the analysis of such experiments are discussed. >

[1]  Thomas Dr Baumann,et al.  Space charge injection and partial discharge inception at the metal polymer interface , 1989, Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics.

[2]  L.A. Dissdo,et al.  Fractal processes and Weibull statistics , 1989, Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics.

[3]  L. A. Dissado,et al.  Theoretical basis for the statistics of dielectric breakdown , 1983 .

[4]  Robert A. Millikan,et al.  Fields currents from points , 1928 .

[5]  Allan Greenwood,et al.  Effects of Charge Injection and Extraction on Tree Initiation in Polyethylene , 1978, IEEE Transactions on Power Apparatus and Systems.

[6]  Fumitoshi Noto,et al.  Voltage and frequency dependence of tree growth in polyethylene , 1974 .

[7]  D. W. Auckland,et al.  Mechanical processes in the long term degradation of solid insulation , 1988 .

[8]  E. Forster,et al.  The Metal/Liquid Interface: the Charge Injection Process , 1984, IEEE Transactions on Electrical Insulation.

[9]  M. Ieda,et al.  DC treeing breakdown associated with space charge formation in polyethylene , 1977, 1976 IEEE International Conference on Electrical Insulation.

[10]  G. Stone,et al.  The Statistical Analysis of a High Voltage Endurance Test on an Epoxy , 1979, IEEE Transactions on Electrical Insulation.

[11]  J. H. Mason.  Assessing the resistance of polymers to electrical treeing , 1981 .