短波频段内UHV输电线路对无线电台站的无源干扰  

Passive Interference to Radio Station Caused by UHV AC Transmission Line in Shortwave Frequency

作　　者：赵志斌[1] 干喆渊[2] 张小武[2] 崔翔[1] 邬雄[2] 

机构地区：[1]华北电力大学电力工程系,保定071003 [2]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2009年第8期1818-1823,共6页High Voltage Engineering

基　　金：国家"十一五"科技支撑计划(2006BAA02A09)~~

摘　　要：为了解特高压交流输电线路对无线电站的无源干扰的影响,利用基于线天线电磁场计算的矩量法程序NEC研究了入射电磁波在1000kV特高压交流输电线路、架空地线以及铁塔上产生的电磁散射对附近无线电台站的无源干扰问题。利用该方法计算分析不同类型的特高压输电线路的无源干扰水平,得到了特高压输电线路的避让距离;通过与特高压线路缩比模型试验的比较验证了所提出避让距离的有效性。考虑到1000kV交流特高压输电线路的其他因素可能产生的影响,从偏严和保护环境的角度出发,建议在短波频段内1000kV交流特高压输电线路对不同无线电台站无源影响的防护间距为:一级无线电台站2000m;二级无线电台站1000m;三级无线电台站500m。The scattering of transmission lines will affect the propagation of the electromagnetic wave, so the distance between transmission lines and the shortwave radio station should be assigned in order to assure the communication quality. Therefore, the radio interference of the 1000 kV UHV AC transmission lines, overhead ground line and power tower on the nearby radio station, which was resulted from the scattering of the incidence electromagnetic wave, was analyzed. By using the method of moment simulator NEC （Numerical Electromagnetic Codes）, based on the calculation of the electromagnetic field from the wire antenna, the radio interference level from the UHV transmission line of different type was investigated, and corresponding protective distance was obtained. The resultant protective distance was validated by the measurement on the UHV transmission line ratio model. With the possible effect of other factors taken into account as well, the protective distance of the 1000 kV UHV AC transmission line for different radio station within shortwave frequency band was proposed from viewpoints of the environment protection and reliability. The protective distances are 2000 m, 1000 m and 500 m respectively for the station of the first, second and third levels.

关 键 词：特高压 无线电台站 无源干扰 避让距离 矩量法 短波 

分 类 号：TN972[电子电信—信号与信息处理]