1.State Grid Jiangsu Electric Power CoLtd Maintenance Company;2.Hohai University
In order to solve the problem that serious insulation fault caused by free pulsation of spherical conducting particle in GIL, an experimental platform proportional shrunken according to GIL device was set up on the basis of analyzing the force of metal particles. The movement locus of metal particle and jumping field were observed and recorded. The generality of the experimental results were discussed through multiple repetitive experiments. The results indicate that particle jumping field is determined by the radius of the particles when the material is fixed, not relevant with the gas pressure and the voltage direction. The range of jumping field decreases gradually with the increase of the quantity of neighboring particles. The pseudo resonance phenomena and firefly phenomena may appear when spherical particle jumps in DC GIL, the probability of firefly phenomena increase with the increase of the particle radius. The jump rate is faster near the insulator than in the middle of the high voltage conductor；Multiple particles will cause the time-divided jumping phenomena and the movement locus is basically similar of the single particle.