Study on the protection characteristics of lightning protection measures for 35kV transmission lines
Sheng Guo, Yong He, Jin Hui Li, Yaohua Zheng, Hanjie Yuan, Harry Tan, Congzhen Xie · 2024
Lightning arrester is an important component to protect the safety of the power grid and reduce the lightning strike trip rate, and its internal nonlinear conductive valve piece can effectively inhibit the overvoltage at both ends of the insulator, so that the insulator does not flashover, and at the same time, reduce the amplitude of the overvoltage of the transmission line. However, due to the high cost of the line arrester, the current 35 kV transmission line is only arranged for the tower section with high lightning strike trip rate. Therefore, this paper establishes a simulation model of 35 kV transmission lines, to study the line in the absence of lightning arrester, configuration of gapless zinc oxide lightning arrester and series air gap arrester in these three cases, the lightning arrester protection characteristics, for 35 kV transmission line lightning arrester installation strategy research to provide theoretical support. First set the transmission line and tower parameters, the use of ATP-EMTP electromagnetic transient simulation software for the simulation of the lightning process, the characteristics of the lightning arrester research. Simulation calculations show that the installation of lightning arrester can prevent insulator flashover and reduce the overvoltage amplitude. The results of the study have a certain guiding effect and reference value for the lightning protection of 35 kV transmission lines.