论文部分内容阅读
IEEE对中波频段输电线路无源干扰谐振机理及其影响因子进行了较为深入的研究,但相关结论无法解释短波频段无源干扰仍存在的谐振现象。为得到短波频段输电线路无源干扰谐振的决定性影响因子,考虑各种可能对干扰造成影响的因素,如线路档距、铁塔数量、导线、地线等单一宏观结构,研究输电线路与天线组成的电磁开放系统中场域的无源干扰水平。引入灰色系统理论及相关性分析,计算各种影响因子对干扰变化的灵敏度,得到各种宏观结构与干扰的关联程度。分析结果表明,线路档距是短波频段无源干扰谐振的决定性影响因子,线路设计阶段可采取调整档距的方法规避干扰极值频点。
IEEE conducted a more in-depth study on the passive resonance mechanism and its influencing factors of transmission lines in the medium-frequency band, but the relevant conclusions can not explain the resonance phenomena still existing in the passive interference of the short-wave band. In order to obtain the decisive influencing factors of passive interference resonance of transmission line in shortwave frequency band, various factors that may affect the interference, such as single macro structure such as line span, tower number, conductor and ground, etc., are considered to study the influence factors of transmission line and antenna Passive interference levels in the field in electromagnetic open systems. The gray system theory and correlation analysis are introduced to calculate the sensitivity of various influencing factors to disturbance changes and the correlation between various macro structures and interferences is obtained. The analysis results show that the line span is the decisive factor of the passive interference resonance in the short-wave frequency band. The circuit design stage can adopt the method of adjusting the span to avoid the interference extreme frequency point.