A theoretical analysis of the capacitive modelling and the induced charge concept in partial discharges

The presence of partial discharges (PD) is one of the most prominent indicators of defects and ongoing degradation processes of electrical insulation. As a high percentage of failures are associated with PD, the need for the classification, extraction and evaluation of PD signals is essential. Therefore, an electrical model of a breakdown void is more than a necessity. In this paper the classical capacitive network representation of the void (model) and a new capacitive model based on the induced charge concept are presented and discussed.