Electric stress computation - a needle-plane electrode system with space charge effects

Authors: Chen, G; Davies, A.E.

Source: COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng., Volume 15, Number 1, 1996 , pp. 40-56(17)

Publisher: Emerald Group Publishing Limited

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Abstract:

The electric stress profiles of a needle-plane electrode system used in the laboratory for investigation of tree initiation and growth have been studied. Results from analytical solution based on a hyperboloid shaped needle tend to differ from those from experiments. One reason is that in practice it is difficult to produce a needle of such a shape. Moreover, researchers have used various shaped needles for their tests. Presents the effects of these needle parameters on the electric stress profile. To simulate the presence of space charge, examines two models, i.e. spherical and cylindrical regions around the tip. For simplicity, the space charge was assumed to be uniformly distributed in the confined region. Results show that space charges can enhance or reduce the electric stress adjacent to the needle tip depending on the nature of the applied voltage.

Keywords: Electrical Engineering; Electricity; Electricity Industry

Document Type: Research article

DOI: http://dx.doi.org/10.1108/03321649610120679

Publication date: 1996-01-01