Electric field distribution characteristics of live working entering equipotential process of ±1100kV transmission line

In this paper, the electric field distribution characteristics of ±1100kV UHV transmission line under the typical entry mode of live working are studied by simulation, the tangent tower head of ±1100kV UHV transmission line and the human body simulation model of live working are created by choosing the entrance mode that is swing from tower body into the line, the surface electric field intensity of the human body during the entrance process of live working is simulated, the results show that the field intensity of the human body surface decreases first and then increases with the shortening of the distance from the line when entering equipotential along the channel directly opposite the granding ring. Typical position during live working, when the human body is on the ground directly below the line, the maximum field intensity of the human body surface appears in the head, and the maximum field intensity of the other positions appears in the foot, when the human body is in the middle of the granding ring, the maximum field intensity of the human body surface exceeds the critical discharge field intensity of the air, which may cause corona discharge to the human body.