|Study of the influence of nonlinear parameters on the efficiency of resistive field grading tube for cable termination |
(Article) Publié: Ieee Transactions On Dielectrics And Electrical Insulation, vol. p.2413 (2018)
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The aim of this paper is to investigate the influence of nonlinear parameters (threshold field, low field conductivity and nonlinearity coefficient) on the performance of a cable termination equipped with a resistive field grading tube in 50 Hz and impulse voltage. The electrical field distribution over the insulator silicone housing surface was computed and analyzed using a finite element software (Flux 2D). Comparative studies between linear field grading (r = 2.9 and 16) and nonlinear resistive field grading (12 < r < 19) show that better effectiveness is achieved with a low threshold field and a high permittivity under 50 Hz and a high nonlinearity coefficient under impulse voltage.