输电线路对短波无线电测向台(站)的无源干扰  

Passive Interference to Short-Wave Direction-Finding Stations Caused by Transmission Lines

作　　者：蒋陶宁[1] 邹军[2] 马信山[2] 崔鼎新[3] 

机构地区：[1]国核电力规划设计研究院,北京市海淀区100095 [2]清华大学电机系,北京市海淀区100084 [3]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2012年第5期29-35,共7页Power System Technology

摘　　要：特高压输电线路的建设对无线电设施造成了无源干扰,其主要是由输电线路的金属部件在无线电波激励下产生感应电流,进而产生反射波引起。该反射波会影响无线电测向台的测向精度,引起示向度误差。为此,建立了铁塔–架空地线系统的电磁散射模型,采用矩量法与电路相结合的方法求解输电线路在无线电波激励下产生的感应电流和反射波,该方法计算结果与解析法计算结果、现场试验测量数据吻合性较好。The construction of UHV power transmission lines lead to passive interference to radio facilities. The main reason of the passive interference is that under the energizing of radio waves induced currents are produced in metal parts of UHV transmission lines and then the reflected radio electromagnetic waves are produced, and the reflected radioelectromagnetic waves affect the finding accuracy of short-wave direction-finding stations and cause the error in lateral precision of direction-finding stations. An electromagneitc scattering model composed of transmission tower and overhead line system is built and by combining the method of moment （MOM） and Norton＇s theorem the induced currents and reflected radio electromagnetic waves produced in transmission lines due to the energization of radio waves are solved. Calculation results by the proposed method well conform to both calculation results by analytical method and measurd resuls from filed tests.

关 键 词：输电线路 无线电测向台 无源干扰 矩量法 

分 类 号：TM726[电气工程—电力系统及自动化]