The layout of different conductive rod in GIS equipment has different degrees of sensitivity to foreign matter inside the enclosure.In this paper

such three typical layouts of conductive rod as positive triangle

inverted triangle and side triangle are taken as the base and the COMSOL is used to simulate the electric field strength of fixed foreign matter at the bottom of the enclosure.The dynamic trajectory collection system for foreign particles is set up through the analysis of the mechanical characteristics of pulsating foreign matter.The study shows that the inverted triangle layout of conductive rod of 126 kV GIS busbar

compared to positive triangle and side triangle

has a greater degree of distortion of the electric field strength due to fixed foreign matter

has a higher jumping height and longer flight time for beating foreign matter and greater hazard to the equipment.While

the side triangle layout is next and the positive triangle layout is relatively insensitive.