Characteristic Analysis of Partial Discharge of Free Metal Particle in GIS

Abstract

Abstract Free metal particle is one of the main defects affecting the safe and stable operation of GIS equipment. In order to further analyze the characteristics of partial discharge produced by metal particles, an independent sealed test model which can simulate real defects is designed in this paper. By adjusting applied voltage, particle size and number of particles, PRPD and n-φ pattern of partial discharge caused by particle defects are characterized. Analysis of the causes of formation of features, especially in the light of particle motion patterns, the transfer and neutralization of charges carried by particles at various stages are elaborated, which provides a reference for the follow-up research and field detection work.