Effects of frequency and applied voltage on electrical treeing discharges

摘要

We have investigated the effects of frequency and applied voltage on electrical treeing discharges. PD number increased with frequency. At a constant frequency, PD number and average PD intensity increased linearly with applied voltage for applied voltage above a certain value. In the case of triangular applied voltage, average charge per cycle are the same for both positive and negative PDs. These were explained well by using the two-threshold model.