Effect of Vibration on Surface Discharge of Epoxy Resin

Abstract

As mechanical vibration usually exists in reactors, its influence on partial discharge (PD) needs to be studied so as to provide new clues for further understanding of the abnormal aging process of the insulation material as well as improve the reliability of on-line PD monitoring method. In this paper, PD characteristics of epoxy resin under different vibration conditions are investigated. Research shows that vibration could promote or suppress the occurrence and development of discharge by changing the state of field emission, the dissipation of charges and the conduction current, obvious variation was observed with the changing vibration amplitude. Moreover there are differences between the variation trend of the PD magnitude at different vibration frequency, which is due to the relative displacement of the electric field distribution and space charge, and the promotion or suppression of surface charge dissipation.