Measurement and simulation of electrical tree growth and partial dischargeactivity in epoxy resin

Electrical treeing in an epoxy resin under an ac voltage for a point-to-pla ne gap configuration has been investigated using a phase-resolved partial d ischarge measurement system and shadow survey and light emission registrati on techniques. A self-consistent model based on the concepts of energy and electric field has been developed and used for quantitative description the temporal-spatial and electric characteristics of electrical treeing obtain ed in experiment. The electrical treeing is considered to be a phenomenon o f self-organized criticality.