Successive Imaging Technique for Electric Field Distribution around Conductors Above a Two-Layer Earth

摘要

The present work aims at developing a method-for the first time-for as- sessing the electric field around a charged conductor positioned in air (of zero conductivity) at a given height above a two-layer earth. The method is based on the complex successive imaging technique, being a quasi-static approxima- tion for estimating the potential due to a line charge above the earth. With the knowledge of the image charges, the electric field values in air and earth are assessed. A laboratory transmission-line model and an electrolytic-tank model were constructed to simulate three-phase and single-phase transmission lines above a two-layer earth.