Simulation of Particle Trajectories in a Three Phase Common Enclosure Gas Insulated Busduct with Monte Carlo Technique

The excellent insulation properties of compressed sulphur hexaflouride are adversely affected by metallic particle contamination in practical gas insulated systems. The movement of such particles is random and the particles play a crucial role in determining the insulation behavior of GIS. Aluminum, copper and silver particles were considered to be present on enclosure surface. In order to determine the random behavior of moving particles, the calculation of movement in axial and radial directions was carried at every time step using rectangular random numbers. Simulation of particle movement with reduced phase conductor is also carried out with a view to obtain optimum size of conductor for reliable operation by reducing the original diameter of the conductor from 64 mm to 54 mm in steps of 5 mm. At each reduced diameter the particle movement is calculated at each instant in both radial and axial directions using Monte Carlo Technique. Monte Carlo simulation is also carried out by changing the random solid angle from 1 degree to 0.5 degrees. The results have been presented and analyzed.