Determination of Permissible Distance Between Air Defense Surveillance Radar and UHVAC Power Transmission Lines

Considering the blank of standards determining the permissible distance between UHVAC (1000 kV) power transmission lines and ADSR stations, we proposed a method combining the physical optics and a linear-phase-Rao-Wilton-Gisson (LP-RWG) basis function to calculate the scattering field of the UHVAC transmission lines. In the calculation, we use the LP-RWG function to discrete the induced current, and then, acquire the radar cross section (RCS) by calculating the scattering field. Especially we carried out in-field full-scale experiments, and the results verified the accuracy of the proposed RCS calculation method. After further analyzing the impact of incident angles, tower types, and tower numbers on the radar detection loss, we were able to obtain a general estimation of the permissible distance to be 1.9-2.1 km with the RCS as an intermediate parameter.