Partial discharge is a localized electric breakdown due to the presence of micro size voids in the solid insulation of switchgear, cables, transformers etc. It is one of the main causes for electric breakdown of solid insulating material. High electric stress concentration due to the presence of voids/impurities leads to partial discharge which further leads to electrical treeing. The objective of this paper is to investigate the effect of nano fillers in inhibiting tree propagation. This is done by calculating electric stress at different points in pure epoxy and epoxy nano composite. For that various analyses are conducted viz. study the electric field stress distribution in base epoxy resin without and with void, the electric field stress distribution in base epoxy resin with three different nano materials added and probability of tree growth in base epoxy resin with filler nano materials. Simulations are done using Finite Element Method (FEM) in COMSOL software.
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Da Kavitha, Sindhu, T. Kb, and Nambiar, T. N. Pa, “Investigation of treeing process in nanofilled epoxy material by Finite Element Method”, Journal of Electrical Engineering, vol. 14, pp. 344-349, 2014.