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有关UHV交流输电线路与无方向信标台电磁兼容方面的研究主要集中在防护距离的分析,对间距无法满足要求时的兼容问题研究较少。为此,从台站频谱参数入手,分析特高压交流输电线路有源干扰下无方向信标台的发射功率限值。首先介绍无方向信标台的工作原理及配置区域,然后分析UHV交流输电线路对台站的干扰机理,最后根据飞行航迹,以防护率为干扰判别依据,结合防护距离的研究,分别针对航路无方向信标台、近距无方向信标台和远距无方向信标台进行有效辐射功率的分析。结果表明,在给定条件下,对于航路和远距无方向信标台,有效辐射功率分别大于5.298 W、5.273 W时,机载无线电罗盘不受干扰;对于近距无方向信标台,与输电线路始终满足兼容的要求,无需分析限值。
The research on UHV AC transmission line and non-directional beacon electromagnetic compatibility mainly focuses on the analysis of protection distance, and few studies on the compatibility problems when the spacing can not meet the requirements. Therefore, starting from the station spectrum parameters, the transmission power limit of non-directional beacon station under active interference of UHV AC transmission lines is analyzed. Firstly, the working principle and configuration area of non-directional beacon are introduced. Then the interference mechanism of UHV AC transmission line to the station is analyzed. Finally, according to the flight path, the protection rate is taken as the basis for interference determination. Combining with the study of protection distance, Non-directional beacon, near-distance non-directional beacon and long-range non-directional beacon for effective radiated power analysis. The results show that the airborne compass is not disturbed when the effective radiated power is greater than 5.298 W and 5.273 W, respectively, for fairways and long-range non-directional beacons under given conditions. For close-range non-directional beacons, Transmission lines always meet compatible requirements without the need to analyze limits.