Modeling of a high voltage insulator under uniform and non uniform pollution

Our study presents a modeling of a high voltage polluted insulator. This model is used for the calculation of the flashover voltage under pollution conditions. Two methods are proposed in this paper. In the first one, we propose a dynamic model predicting the propagation of the discharge on the polluted surface. We use an equivalent electrical circuit and the propagation criteria of Hampton. The shape of the insulator is considered by using its open model. This latter is a transformation of the insulator's profile to a 2D representation. The validation of the calculation results is done using experimental studies. In the second one, a regression model of the insulator is proposed using the Least Square Vector Machine (LS-SVM) method. A Hybrid optimization technique is proposed in order to improve the prediction performances of this supervised learning statistical method. Tests and validations are done in order to evaluate the viability of the proposed model. The ability of prediction of the two presented models is tested. According to the applied investigations, it was noted that the optimized LS-SVM model offers better performances.