摘要
特高压架空输电线路的架空地线通过避雷器与杆塔连接,杆塔与地线没有构成闭环,单个杆塔可看作独立的天线元考虑,据此提出了用单个杆塔的二次辐射场推导出杆塔成列影响的计算方法以简化特高压输电线路的二次辐射场。该法首先利用阵列的概念推导了不等比幅值等相位差各向同性的天线阵列影响系数,并且考虑杆塔间的互耦干扰对阵列影响系数进行了修正;然后用NEC电磁仿真软件计算了单个杆塔对近场的二次辐射,并乘以阵列影响系数得到了整条输电线路的二次辐射场;最后,对照实际线路建模的二次辐射场计算值,给出了这种简化计算方法的误差水平,确定这一简化方法在保证高效计算的同时有足够的精度。
As the overhead ground wire of the ultra-high-voltage transmission line （UHV TL） is connected to the steel tower with attester, the wire and the tower is open-loop, the single tower can be seen as a unit of antenna, the simplified calculation method based on the single tower＇s reradiation field and the array-coefficient is provided. First in this paper, the array-coefficient of the non-geometric proportion-amplitude-equal difference-phase isotropy antenna array is derived, the coupling effect is considered to modify the array-coefficient, then using the NEC simulating software, single tower＇s reradiation at near field is calculated, multiplying the array-coefficient and the single tower＇s re-radiation, the whole transmission line＇s reradiation is got. At the end of the paper, the real model of the whole transmission line is built to verify the error of the simplified method, which has been proved to have sufficient precision.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第11期2283-2287,共5页
High Voltage Engineering
基金
“十一五”国家科技支撑计划:《特高压输变电系统开发与示范》,1000kV交流输电线路与无线电台间防护距离的研究(2006BAA02A09)~~
关键词
特高压
输电线路
二次辐射
短波段
近场
阵列影响系数
互耦影响
UHV
transmission line
reradiation
midwave frequency
near field
array-coefficient
coupling effect
作者简介
干喆渊1979-，男，博士从事电磁兼容方面的研究E—mail：ganzy@whvri．com
张小武1977-，男，博士从事电磁兼容方面的研究
张广洲1975-，男，高工从事电磁兼容方面的研究
邬雄1964-，男，教授级高工长期从事电力系统电磁兼容及电磁环境研究
周文俊1959-，男，教授，博导研究方向为微电子设备防雷接地、高电压绝缘与测试、电磁兼容、电力电子技术在高电压中的应用等
