Numerical Analysis and Experiment of Corona Discharge due to Conductive Particle in High-Voltage System

摘要

Corona discharge due to a conductive particle in high-voltage system is analyzed using a coupled equation, which consists of Poisson's equation for electric field distribution and a discharge equation for space charge density variation. The charge of a conductive particle is calculated using the finite element method, and the electric force acing on the particle is obtained using the calculated result. Corona discharge occurs when the electric field intensity between the particle and an electrode exceeds the dielectric breakdown strength of air. The analysis result is the electron density distribution due to discharge. A conductive particle is used in the experiment, and the particle motion is observed using a high-speed camera.