电网技术2024，Vol.48Issue(7)：3075-3083,中插117,10.DOI:10.13335/j.1000-3673.pst.2023.1103
计及邻近线路架设方向和屏蔽影响的密集输电通道防雷性能仿真分析
Simulation of Lightning Protection Effects in Dense Transmission Channels Considering Erection Directions and Shielding Effects of Adjacent Lines
摘要
Abstract
After investigating the research status of transmission line lightning protection designs,this paper proposes an improved electrical geometric model to calculate the shielding failure tripping rate considering the shielding effects between lines in dense transmission channels and verifies its feasibility,mainly including the optimization of the calculation idea and the modification of the ground dip angle processing method.Based on the proposed calculation method,the calculation and rule analyses are carried out for three transmission lines under the parallelled working conditions.It is found that the adjacent lines play a dominant role in the shielding effect between lines,and the strength of shielding effect does not change linearly with the line spacing,but change with a rapidly changing range.On this basis,the calculation of the line spaces and the heights to the ground considering the actual line trends and sags is proposed.The proposed method is used to calculate in the actual project,which proves the feasibility of the method.This method has a certain guiding role in the lightning protection reconstruction of the transmission lines.关键词
密集输电线路/绕击跳闸率/屏蔽系数/改进电气几何模型法Key words
dense transmission lines/shielding failure trip-out rate/shielding coefficient/improved EGM method分类
信息技术与安全科学引用本文复制引用
谷山强,李健,吴敏,张昊琛,邓冶强,王羽,马志青..计及邻近线路架设方向和屏蔽影响的密集输电通道防雷性能仿真分析[J].电网技术,2024,48(7):3075-3083,中插117,10.基金项目
国家自然科学基金项目(批准号51777037).Project Supported by the National Natural Science Foundation of China(Grant No.51777037). （批准号51777037）
