Numerical Calculation of Electric Field Intensity on the Surface of Bundle Conductors of Overhead Transmission Lines

The electric field intensity on surface of con ductors can be calculated accurately by applying FEM numerical method to the bun dle conductors of overhead lines. This method is suitable for all kinds of tower s and all arrangements of bundle conductors. It is found from the results of cal culation that, the electric field intensity on surface of bundle conductors beco mes higher, if the radius of conductors increase; it is increased moderately if bundle spacing is widened; it is decreased if distance between phases increase; when the height of conductors increase, the surface electric field intensity on B and C phases decreases but increases on A phase.