Paper Title
Simulation of Metallic Particles in Single Phase Gas Insulated Busduct

There is an better alternative for air insulation technology i.e. SF6, in modern days due to its high dielectric strength and arc quenching properties. Nowadays, the quantum of SF6 gas insulated substations is increased because of its compactness, less maintenance and also lower space requirement. Even though there is rising trend of development of gas Insulated Substations, there are major or minor failure reports of GIS as per CIGRE survey studies. One of the major reasons for the failure of these gas insulated substations (GIS) is due to the metallic particle contamination. The free metallic particles move in the gas insulated busducts due to influence of electric field and lead to the breakdown of the insulating properties of SF6 and thus failure of GIS .The motion of these particles is experienced by various opposing forces such as drag force which is a function of the pressure of the gas medium and gravitational force .The present work is an attempt to determine the random movement of metallic particles and probability of crossing gap between earthed enclosure and energized conductor which ultimately causing the partial discharge. Besides, the study is conducted on different dimensions of particle and voltage level to investigate their impact on displacement of particle in single phase gas insulated busduct for better relevance. The Aluminium, Copper and Silver wire type particles which are mostly generated due to manufacturing defects, with length 12mm and radius 0.2mm are considered to be present on the inner surface of the enclosure. The simulation results show that the 3 dimensional representation of particle trajectories i.e. displacement of the particles in the gas insulated busduct.In order to determine the randomness of motion of particle Monte-Carlo method used in MATLAB simulation. Keywords - Particle Contamination, Gas Insulated Busduct, Monte-Carlo, Radial Movement, Particle Trajectory.