Özet:

Abstract Bushing is considered an essential part in the transmission lines stations and power plant. It acts as an essential part of its function includes meeting all the requirements of the application which are electrical, thermal, and mechanical.  Bushing failures are critical especially in transformer applications as it could lead to total failure of the transformer. Based on previous research, common failures of the bushing are associated with ageing, design, operation and possible quality issues. In this paper, porcelain type bushing coated Room Temperature Vulcanization (RTV) material was modelled and simulated under the lightning impulse voltage which is used as an electrical stress in this project. Objective of this paper is to evaluate the effect of RTV coating material to enhance the performance of porcelain bushing under lightning impulse in term of voltage profile and the electric field distribution along the bushing. ANSYS software is used to design bushings and the criteria of a bushings for a simulation of a real-life bushings. From the simulation work, RTV coating appeared to be useful in that it would protect the bushing and improve the surface to withstand flashover. The RTV coating material also helps in improving the bushing insulator performance and increases the lifespan and the reliability of the power system.

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