A New Model for AC Insulators Flashover

摘要

This paper presents a new model for high voltage insulators flashover that describes the different phases of flashover process under AC voltage. This model uses an equivalent electrical circuit consisting of two resistances in series. It comprises two algorithms: (1) the first one is a static sub-model that describes the stable mode for the beginning of flashover; and (2) the second one describes the unstable mode of the discharge by a dynamic sub-model. This model allows us studying the different characteristic parameters of discharge channel. The temperature and the linear resistance of discharge are determined using an energetic balance. It is shown among others that the simulated and experimental values of discharge current are found in a good accordance.