Dynamic Simulation of Metal Particles Randomly and Driving Efficiency of Drive Electrodes for High Voltage DC GIL

It is important to solve the problem of metal particle pollution inside the dc gas insulated metal enclosed transmission line (GIL). Using numerical simulation to calculate the trajectory of metal particles is an important method of designing particle traps and drive electrodes. In this article, a 3-D simulation method of dynamic particle motion randomly based on quadratic Rodrigues' rotation is proposed to solve the trajectory of metal particles inside the dc GIL, considering the random reflection. Based on this model, the influence characteristics of random reflection angle, gravity inclination, particle size, and other factors on particle motion are analyzed. From the results, the trapping efficiency of particle traps becomes weaker under the effect of gravity, and particles with larger sizes are more likely to escape. The drive electrodes set at the high voltage conductor can prevent particles from crossing the drive electrode. It can effectively improve the capture efficiency of the particle trap and increase the capture-escape ratio by more than 45.9%.