Effects of Corona Ring Parameters on Electric Field Sharing Along Suspension Insulator String under Lightning Impulse Overvoltage Based On FEM

摘要

Porcelain insulators are extensively used in high voltage transmission lines. O ne practical way to reduce electric field stresses on insulator string is corona ring installation at the energized side. This paper presents a 3 -D finite element method simulation of electric field distributio ns around HV insulator string under lightning impulse voltage. Also, The impact of corona ring parameters on reduction of electric field stress is determined for 230kV cap and pin type porcelain insulator string under lightning impulse excitation