https://doi.org/10.1051/epjconf/202533007004
Overview of Various Models of Insulators with Thin Coating Layers
National Institute of Applied Sciences and Technology, LR11ES25 MMA Lab University of Cartage Tunis, Tunisa dhahbinabila@yahoo.fr
National Institute of Applied Sciences and Technology, LR11ES25 MMA Lab University of Cartage Tunis, Tunisia haifa_nouir@hotmail.fr
National Institute of Applied Sciences and Technology, LR11ES25 MMA Lab University of Cartage Tunis, Tunisa slimkaddeche@yahoo.fr
Published online: 30 June 2025
In this study, the electric potential distribution along an insulator model coated with a thin stress grading material was analyzed using a numerical formulation based on the Spectral Collocation Method (CSM). Comparative assessments against analytical solutions, established numerical approaches from the literature, and the Finite Difference Method (FDM) validated the accuracy and robustness of the proposed method. The CSM demonstrated numerical precision equivalent to that of FDM while offering significant advantages in terms of computational efficiency and implementation simplicity when compared to both FDM and the Finite Element Method (FEM). Moreover, the evaluation of the maximum electric field reduction at the high-voltage electrode quantitatively highlighted the effectiveness of incorporating nonlinear conductivity within the grading layer.
Key words: Electric potential distribution / numerical code / collocation spectral method (CSM) / finite difference method (FDM) / finite element method (FEM) / nonlinear conductivity
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
