Abstract In order to study the motion behavior and hazard of spherical particle and linear particle, a 2:1 scaled model cavity according to 126kV gas insulated switchgear (GIS) was set up. The whole process of jumping, collision, movement and stopping of spherical and linear particles was record and described. The hazards of the final stopping position of the two kinds of particles were discussed through multiple repetitive experiments. The results indicate that after the spherical particles jump, the radial height is about 2mm. As the linear particles jump, one end first lifts, the particles stand and jump, and the radial jump height is about 5mm. The spherical particles bounce back when colliding with insulators and they all stop in the weak external electric field. Linear particles adsorbed will easily cause partial discharges and induce flashover voltage along the surface. The effects of Coulomb force, gravity, electric field gradient and image force were analyzed. It is also demonstrated that the image force is the main reason for the final formation of particle adsorption on the insulator.
Zhang Liangen,Lu Shijie,Li Chengrong等. Motor Behavior and Hazard of Spherical and Linear Particle in Gas Insulated Switchgear[J]. Transactions of China Electrotechnical Society, 2019, 34(20): 4217-4225.
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2019, Vol. 34 
