Electric Field Simulation of Line Jumping Process of UHV Tension Tower by Live Working

The squirrel-cage rigid jumper is used in UHV DC tensile tower, which is suspended by double V-type suspension string. In live working, workers usually enter the equal potential position from the tower mast horizontally. In order to study the path of entering, the electric field calculation was carried out. In the study, two paths were selected, including facing the large grading ring and keeping one meter off it when entering the equipotential position horizontally. And 20 points were selected in each path, to calculate the electric field of the large grading ring and the worker surface, when the worker in each point selected before. According to the calculation results, basing the principle of low field strength and gentle change, keeping one meter off the large grading ring when entering the equal potential position horizontally from the tower mast is recommended.