Particle Motion Full-Scale Test Under the Condition of Operation of AC GIS Isolation Switch and Inhibition Means Analysis

In GIS, the generation and movement of metal particles are one of the important reasons leading to discharge faults. At present, in the research of particle motion and particle trap validation in GIS, the simplified model is often used for test, which is still different from the actual working condition, and it is difficult to directly support the fault analysis.In this paper, based on the 252 kV GIS products, a full-scale test platform is constructed, and the motion process of three kinds of free metal particles is studied on this platform. The influence of isolator operation on the motion of various particles is proposed, and the motion trend of various particles on the full-scale test platform is summarized. Based on this, a trap structure suitable for 252 kV GIS products is proposed. The size of the trap is optimized from the perspective of electric field verification, and the trapping effect of the particle trap is verified and discussed. The results of this study can provide some guidance for the analysis of insulation faults caused by metal particles in GIS and the improvement of particle suppression methods.