Breakdown voltage prediction of rod-plane gap in rain condition based on support vector machine

Abstract

Listen

Translate article

Air gap breakdown is the result of the synthetic effect of electric field distribution and atmospheric environment. The breakdown voltage prediction model of rod-plane air gaps under rain conditions was established by support vector machine (SVM). The electric field features and atmospheric parameters were taken as the input of the prediction model. Based on the idea of binary classification, the withstanding or breakdown of an air gap under applied voltage was characterized by −1 and 1, which was taken as the output of the prediction model. 9 training samples were selected based on the idea of orthogonal design, and the power frequency breakdown voltages of other 29 test samples were predicted by the proposed model. The predicted results coincide well with the experimental values, and the average error of the 29 test samples is only 0.74%. The influence rules of the atmospheric parameters on breakdown voltage obtained by analysing the predicted results are almost the same with those obtained by experiments, which validates the accuracy and rationality of the proposed method. The research results can provide reference for breakdown voltage prediction and discharge characteristic study of air gaps in complex atmospheric environment.