HIMER Aymen, HADJAB Mohammed AminEnca/ Khaled BELHOUCHET2023-07-122023-07-122023-07-12ELC/2023http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/40422High voltage insulators are key elements in the operation of electrical power networks. Their role is to connect the conductors to the supports by ensuring their electrical insulation. They can be exposed, during the year, to several electrical, physical and environmental factors including pollution. This can threaten and reduce the electrical performance of dielectric materials. In this work, a study on a cap and rod insulator (1512L) is proposed to study the repartition of electric field and potential along the insulator under different conditions. First, we will perform three scenarios by applying different voltage levels. Simulation studies are done using Comsol software to evaluate the potential and electrical field distribution along the insulator. To do the analysis; a statistical model to deal with the relationship between the pollution and the insulator layer parameters (conductivity of the pollution layer and its position) is proposed. These parameters are varied each time in this search. The statistical technique of variance (ANOVA) is used to assess the impact of each parameter. The study proposed in this thesis provides an effective and useful working tool to examine and enhance the thermal and dielectric properties of the studied insulatorsfrInsulator, Pollution, Electric Field, Simulations, Comsol, ANOVA.Thesis