Lightning Critical Flashover Voltage of High Voltage Insulators: Laboratory Measurements and Calculations

摘要

This paper presents the method for calculation of lightning critical flashover voltage (CFO) of high voltage insulators. Flashover occurrence on overhead transmission line insulators for 110 kV, 220 kV and 400 kV networks was studied using the leader progression model (LPM). Calculation results were compared to laboratory measurements and it was verified that presented method predicts CFO with good accuracy.