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

作　　者：谷山强 李健[1,2,3] 吴敏 张昊琛 邓冶强[4] 王羽 马志青 GU Shanqiang;LI Jian;WU Min;ZHANG Haochen;DENG Yeqiang;WANG Yu;MA Zhiqing(NARI Group Corporation Ltd.,Nanjing 211106,Jiangsu Province,China;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,Hubei Province,China;Hubei Key Laboratory of Power Grid Lightning Risk Prevention(Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute),Wuhan 430074,Hubei Province,China;School of Electrical and Automation,Wuhan University,Wuhan 430072,Hubei Province,China;State Grid Qinghai Electric Power Research Institute,Xining 810008,Qinghai Province,China)

机构地区：[1]南瑞集团有限公司,江苏省南京市211106 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北省武汉市430074 [3]电网雷击风险预防湖北省重点实验室(国网电力科学研究院武汉南瑞有限责任公司),湖北省武汉市430074 [4]武汉大学电气与自动化学院,湖北省武汉市430072 [5]国网青海省电力公司电力科学研究院,青海省西宁市810008

出　　处：《电网技术》2024年第7期3075-3083,I0119,共10页Power System Technology

基　　金：国家自然科学基金项目(批准号51777037)。

摘　　要：在调研了输电线路防雷设计的研究现状后,针对考虑密集输电通道中线路间屏蔽作用的绕击跳闸率计算问题提出了改进的电气几何模型法并验证其可行性,主要包括了计算思路的优化和地面倾角处理方式的修正。基于所提出的计算方法,针对3条输电线路并行工况进行了计算和规律分析,发现对线路间屏蔽效果占主导作用的为相邻线路,且屏蔽作用的强弱并非随线路间距线性变化,而是存在一个快速变化的区间范围。在此基础上,提出了考虑实际中线路走向和弧垂的线路间距和对地高度计算方法,基于所提出的方法对实际工程进行了计算,证明了方法的可行性,对输电线路的防雷改造具有一定的指导作用。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 

分 类 号：TM721[电气工程—电力系统及自动化]