Propagation of Electrical Trees under the Influence of Mechanical Stresses: A Short Review

Abstract

The present paper deals with the phenomenon of electrical treeing in solid insulation, under the influence of mechanical stresses. In this short review, it is indicated that mechanical stressing can affect the propagation of electrical trees and –depending on whether it is tensile or compressive- it can facilitate (or render more difficult) the breakdown. In aged insulating materials, electrical trees can appear very quickly and can lead to breakdown.

Some Factors Affecting the Breakdown Strength of Solid Dielectrics: A Short Review

“…Without the need of an exaggeration, one can conclude that the problems arising in VII. MECHANICAL STRESSING In the context of the present paper we will not deal with mechanical stressing and its effect on electrical trees in solid dielectrics (since this topic has been dealt before [78]) nor we will deal with internal residual mechanical stresses. The aim here is to somehow mention several studies in relation to the mechanical stressing to the breakdown strength of soli dielectrics.…”

Influence of Electric Field on Electrical Tree Growth in Epoxy Resin with Fillers

“…However, void-defects may exist owing to imperfection of manufacturing because of several surface boundaries between epoxy resin and conductor. Additionally, the mechanical stress and the large temperature difference between the conductor and the epoxy resin may produce cracks [3]. The electric eld in such void-defect becomes higher than that at other regions, and then partial discharges (PDs) [4][5][6] occur in the void-defect in which electric eld strength exceeds a PD inception electric eld [7,8].…”

Efficiency of different optimisation approaches for optimal parameters of the CSM for investigating the onset field due to corona point

“…The needle tip generates a massive electric field with a non-uniform property [4,5]. This non-uniform electric field arisen from the needle electrode tip makes the field calculations more and more complicated [1,6,7].…”