Cellulose Particle Dynamics Tests and Simulation in Mineral Oil under Impulse Voltage

The high pollution degree of cellulose particles in mineral oil will reduce the dielectric strength of oil-paper insulation of transformer. The dynamics of the cellulose particle in mineral oil under two types of impulse, the standard lighting impulse and the standard switching impulse, are experimentally explored in this paper. An experiment is conducted on particle moving in mineral oil gap submitted the two types of impulse. The aggregation of particles in concentrated area of the electric field in the oil gap is observed under the standard switching impulse. This may constitute the fault risk of transformer operation, which should be paid enough attention.