Electric Field Behavior of Water Drop on Composite Insulator Surface under DC Stress

The objective of this paper is to study the behavior of the electric field near a water drop on composite insulator surface under DC stress. The studies are performed using a simple structure of composite insulator with two sheds. Simulation software based on Maxwell equations is considered in the investigation of a water drop. Water drop is placed at different positions on the insulator shed. The electric field values while moving the water drop from the core of the insulator to the edge of the shed are observed. The electric field values under DC stress are measured using the DC conduction solver in the ANSYS MAXWELL software. It can be seen from the simulations that positions of water drop significantly affects the electric field. The contact angle between the insulator surface and water drop has an impact on the electric field. Therefore it is important to observe the simulation results to know the behavior of a contact angle on the electric field stress. For this purpose four different angles are considered in this study. It can be seen from the results that the contact angle considerably affects the electric field values.