摘要
输电线路对邻近无线电台站的无源干扰可能影响无线电台站信号的有效接收和发射,因此准确计算在外界电磁波入射情况下包括架空导线和杆塔在内的输电线路的电磁散射是确定两者合理避让间距的基础。对于雷达台站而言,由于雷达的工作方式等影响,架空导线是影响雷达探测的主要因素。针对一般情况下应用矩量法开展无源干扰计算时,将架空导线全部假设为圆柱导体,分别就建模方法为线模型、三角形面模型的架空导线空间电磁场的方法进行了阐述,并且与实际绞线形式架空导线的计算结果进行了对比,获得了建模方法不同的导线在雷达不同工作频率和空间不同位置处的电场强度,分析了应用线模型和三角形面模型等面模型以及实际绞线模型对导线建模的适用范围。从而为获得雷达与无线电台站的避让距离提供了建模基础。
Passive interference from transmission lines to neighboring radio stations may affect the effective reception and transmission of radio station signals.Therefore,to determine the safe distance between radar and its neighbouring radio station,it is basic to accurately calculate the electromagnetic scattering of transmission lines including overhead wires and towers with incidence of external electromagnetic waves.For radar stations,the overhead conductor is the main factor that affects the radar detection because of their working mode and other reasons.In general cases,the moment method was applied to carry out passive interference calculations and all overhead lines were assumed to be cylindrical conductors.However,this paper described the calculation of space electromagnetic field with line model and triangular surface model and compared with the calculation results of the overhead conductor in actual wire.This paper found out the space electric field strength through different conductor modelings with different operating frequencies and at various spacial positions.It also analyzed the application scope of conductor modelings including line model,triangle surface model and actual twisted line model.Thus,this paper provided basis for modeling the safe distance between radar and radio stations.
作者
卢莹
赵志斌
干喆渊
张建功
LU Ying;ZHAO Zhibin;GAN Zheyuan;ZHANG Jiangong(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Wuhan Branch of China Electric Power Research Institute,State Key Laboratory for Environmental Protection of Power Grid,Wuhan 430074,China)
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2019年第3期66-72,共7页
Journal of North China Electric Power University：Natural Science Edition
关键词
输电导线
矩量法
无源干扰
雷达
transmission conductor
moment method(MOM)
passive interference
radar
