UHVAC输电线路对无方向信标台有源干扰的分级

Study on Classification of Active Interference in Non-directional Radio Beacon Caused by UHVAC Transmission Line

特高压交流输电线路对无方向信标台有源干扰的影响程度是工程中必须考虑的因素,目前这方面的研究还较为少见。在特高压交流输电线路有源干扰下,对无方向信标台所面临的干扰进行了分级。首先描述了特高压交流输电线路对无方向信标台有源干扰的产生机理,然后提出干扰分级方法,推导了接收机信噪比模型,给出了无方向信标台在输电线路有源干扰下的信噪比曲线,并对晴空和大雨条件下的信噪比进行了对比分析,根据仿真结果对无方向信标台受到的干扰进行了分级。研究表明,分级结果能细致地反映台站受输电线路有源干扰的程度,为线路、台站的架设提供理论依据。

The influence degree of active interference in non-directional radio beacon caused by ultra high voltage alternating current（ UHVAC） transmission line is a necessary factor in practical engineering,which is studied little.The active interference in non-directional radio beacon caused by UHVAC transmission line is classified.Firstly the interference mechanism of non-directional radio beacon from UHVAC transmission line is described.Then the interference classification method is put forward.Non-directional radio beacon receiver＇s signal to noise ratio（ SNR） model is derived.The curve of SNR under the condition of active interference caused by UHVAC transmission line is provided.The SNR under the condition of clear sky and heavy rain is contrasted and analyzed.The interference non-directional radio beacon facing is classified according to the simulation results.The study shows that the classification results can reflect the influence degree of the active interference to the station in details,which provide theory basis for erection of lines and stations.