The Study on Charging Mechanism and Motion Characteristics of Particles for DC GIL/GIS
摘要
The metal particles in GIL/GIS and their failure-inducing characteristics have been fully confirmed in failure analysis in recent years. After the DC GIL/GIS equipment is put into operation in the future, affected by the DC voltage, the internal metal particles have a high speed, a wide range of activities, and the probability of causing insulation failure. Therefore, more attention should be paid to such problems. In this paper, the source and possible location of metal particles in gas-insulated transmission lines and the influence of particles on the electric field when they exist in different locations are analyzed. The force on metal particles in the GIL/GIS cavity was analyzed and the lifting field strength was calculated. Particle lifting and motion characteristics observation experiments under the flat electrode are designed to verify the above theory, which has great important academic and engineering significance for the study of particle capture methods in DC GIL/GIS.