Increasing Electric Field Uniformity in Insulator Under Pulse Excitation by Varying Its Conductivity

In this paper, how the electrical conductivity affects electric field distribution uniformity in a cylindrical insulator under double exponential pulse excitation is investigated. The underlying basis is the vectorial-scalar potential equations and the mathematical model is developed in COMSOL and solved with its internal solver. It is found that by regulating the inhomogeneous conductivity of the insulator, the purpose of controlling the conduction current of the material and thus improving the electric field distribution uniformity in the interior and along the surface can be achieved.