特高压线路干扰下无线电罗盘测角误差分析

Analysis of the Angle Deviation in Radio Compass Caused by UHV Transmission Line

特高压输电线路的电晕放电是机场无方向信标台的主要干扰源之一。根据无线电罗盘的工作原理,在特高压输电线路电晕干扰条件下,通过理论推导得出了无线电罗盘测得的电台相对方位角误差。针对无方向信标台不同频率、台站与输电线路间不同的距离,对无线电罗盘受干扰影响产生的测角误差进行了仿真分析。研究表明:电晕放电干扰下,机载无线电罗盘测得的电台相对方位角误差随距离的增加而增大,随频率的增加而减小,且变化趋势由陡峭逐步趋近平稳。

Ultra high voltage（ UHV） transmission line corona is one of the main interference sources of Airport Non-direction Radio Beacon. According to the working principle of radio compass,the radio relative azimuth angle deviation measured by airborne radio is given theoretically. The angle deviation is simulated on the condition of different frequency,distance between non-directional radio beacon and transmission line. The study shows that with the interference caused by corona discharge,the radio relative azimuth angle deviation measured by airborne radio increases with the increase of distance and changes steep leveled off with the increase of frequency.