Comparative study for the installation of overhead ground wire affecting the electric field of high voltage transmission lines

This paper presents a study comparing the distance and height of overhead ground wire that affects the distribution of the electric field of high voltage transmission towers, single circuit 500 kV voltage level, type 4 bundle is the highest of Thailand. The analysis focuses on the electric field distribution from the transmission line. When changing the overhead ground wire position to installation. By considering suitable location that makes the electrical field distribution around the ground were minimal. Consider for a height of 1 meter from the ground and to compare the electric field with standard ICNIRP This paper has been living a mathematical model of the electric field in the form of differential equations and, based on simulation results with Finite Element Method. It is being designed within the sliding wire overhead. A long scroll both horizontally and vertically. From the simulation results, it was found that the area overhead ground wire installed at a height of 50.484 meters from the ground and the horizontal distance from the center pillar on each side of 10.65 meters, the electric field is minimal which equals 7.5907 kV / m.