Electromagnetic scattering field calculation of UHV power transmission line at VHF based on fitting algorithm

The reradiation interference protection of UHV power transmission line is the key issue of the current Chinese UHV field of electromagnetic compatibility, however solving the problem of traditional transmission lines interference protection is limited to the MoM, so it can´t resolve the VHF (30-300 MHz) wide-band electromagnetic scattering field sweep calculation. This paper introduces the MBPE technique, using a number of sampling points information, selects Pade polynomial to interpolate the information on a large number of scattered field wide-band transmission lines, reduces the number of solving MoM, and obtains the Electromagnetic Scattered field characteristics of VHF UHV transmission lines by fitting calculation method. The results illustrate that the maximum absolute error for extreme points can´t exceed 5%.