Electric Field Analysis of Multi-shape Metal Particle Adhesion Defects in 110 kV GIS
Gas insulated switchgear(GIS) is widely used in high voltage substation field,and its safe and stable operation is crucial for power system,and metal particle adhesion defect is one of the main causes of GIS equipment failure.Based on the finite element simulation,a simulation model of 110 kV GIS equipment is established to simulate the influence of different shapes and multiple metal particle attachment defects on the electric field of GIS equipment.The results show that the electric field distortion at the elongated particles increases with the increase of the degree of slenderness;spiked particles with a spike angle of 60° when the electric field distortion is more serious;the thinner the circular lamellar particles,the more serious the electric field distortion;multi-particle attached electric field distortion mainly for the role of two of the particles,with the particles increased radial separation distance and increase,and the rest of the situation is similar to a single particle attached;the degree of electric field distortion caused by each shape of metal particles in descending order:round flake>linear>rectangular flake>spherical.The calculation results can be used for the local discharge detection and diagnosis of the defects of metal particles attached to the solid insulation surface in GIS.
Gas insulated switchgearfinite elementmetal particlesmorphologydefectselectric field analysis
万方数据
维普
