UHV输电线路对无方向信标台无源干扰仿真

Simulation of Reradiation Interference in Non-Directional Radio Beacon Caused by UHV Transmission Line

由于采用传统的飞行校验方法研究对无方向信标台的无源干扰具有费用昂贵,测量结果不能全面反映各种条件下的干扰情况等缺点,应用电磁仿真软件FEKO对特高压输电线路对无方向信标台的无源干扰进行仿真研究。以近距无方向信标台和特高压直流输电线路为研究对象,建立无源干扰线模型,在固定频率和固定间距条件下,分别研究了特定下滑角度对应的电场方向图以及全方位的无源干扰程度。结果表明:在特高压直流输电线路无源干扰下,天线方向图发生明显畸变,特定下滑角度对应的不同方位电场强度呈对称分布状交替增加和减少,随着距离增加,总体干扰程度逐渐降低,随着频率升高,总体干扰程度逐渐加深。研究方法及结论可以为实际工程的干扰预测分析提供参考。

The electromagnetic simulation software FEKO is used to study the reradiation interference in non-directional radio beacon caused by ultra high voltage direct current（ UHVDC） transmission line for the reason that traditional flight verify is not economic which can not measure interference in all kinds of conditions. Close non-directional radio beacon and UHVDC transmission line were studied by reradiation interference wire model about electric field direction chart and the total interference level in all directions at the special glide angle under the condition of special frequency and distance between close non-directional radio beacon and UHVDC transmission line. The results show that under the condition of reradiation interference caused by UHVDC transmission line,antenna two-dimensional direction chart changes seriously. Electric field intensity in different directions at the special glide angle increases and reduces in turn with symmetrical distribution. The total interference level gradually drops with the increase of distance between close non-directional radio beacon and UHVDC transmission line while it grows with the increase of frequency. The study method and results can provide reference for interference prediction and analysis in practical engineering.