Study on pulsed electrical stress aging characteristics of epoxy resin based on partial discharge

A set of Tesla pulse power generators is designed to deal with the impact of electrical stress aging in GIS.By controlling the output amplitude and frequency of the pulse voltage,the nano-Al₂O₃ filler and epoxy resin are mixed and filled at different voltages.Variations of insulation characteristics and partial discharges are studied under amplitude and frequency test conditions.The results show that higher pulse amplitude and pulse frequency will accelerate the process of space charge incidence and de-collapse,intensify the partial discharge process inside the composite material,promote the development of conductive channel branches,and then make the composite material more aging.The results of this study are conducive to improving the ability to detect defects in electrical equipment,reducing the probability of failure,reducing the time for power failure and maintenance,and providing a reference for the analysis of abnormal failures of equipment.