In the present day, technology, economics, and environmental sustainability have all combined to produce some very significant design problems for Gas-Insulated Substations (GIS). Substations that use gas-insulated switchgear must maximise their return on investment while dealing with these issues. This necessitates lowering total cost, enhancing reliability, maintaining operational flexibility, and regulating their operations environmental impact. Recently, the insulation failures of the Gas

more »

... sulated Busduct (GIB) have been observed due to several defects caused during the switching and manufacturing process, such as delamination, protrusion, depression, gap, etc. These defects make a significant impact on the surface of the insulator and hence deenergise the Gas Insulated busduct device, resulting in a huge economic loss. In this paper, the effect of a free particle is analysed on a disc type Functionally Graded Material (FGM) insulator for a single-phase GIB at Triple Junction. The developed electric stress is reduced by inserting metal inserts at the end of the enclosure. The new technique called doping of FGM materials with different permittivity values is spatially distributed with many filler materials to achieve uniform electrical field stress. The simulation is conducted at various voltages and for different gradings of FGM for the designed insulator. The results obtained are presented and analysed showing the effectiveness of the proposed insulator.