电气化铁路影响下二次雷达的电磁环境评估分析

Electromagnetic Environment Assessment and Analysis of Secondary Surveillance Radar under the Influence of Electrified Railway

为探究电气化铁路对二次雷达的电磁环境影响程度。分析了二次雷达的电磁环境要求;对动车的锚段关节、牵变所、分区所等典型位置,利用电磁干扰接收机进行点频测试,得到了其在二次雷达下行工作频率下的电磁辐射特性;应用电磁传播理论,以电气化铁路垂直穿越航空器下滑道为例,理论分析了典型位置电磁辐射对二次雷达的影响。根据GB 6364航向信标防护率要求,结合典型位置实测数据,进行了电磁兼容预测。结果表明:当电气化铁路满足二次雷达场地保护要求时,电气化铁路不会影响二次雷达的正常工作。研究结果能给电气化铁路和民用航空机场区域的电磁兼容问题提供建议和数据支撑。

To explore the degree of influence of electrified railway on the electromagnetic environment of Secondary Surveillance Radar,the electromagnetic environment requirements of the Secondary Surveillance Radar are analyzed. For the typical positions such as overlap,traction substation and section post, the electromagnetic frequency interference receiver is used for the point frequency test, and the electromagnetic radiation characteristics of the Secondary Surveillance Radar operating frequency are obtained. Using electromagnetic propagation theory, taking the electrified railway vertically through the aircraft glide path as an example, the theoretical analysis of the influence of typical position electromagnetic radiation on the Secondary Surveillance Radar is conducted. According to the GB 6364 localizer protection rate requirement, combined with the measured data of the typical position, the electromagnetic compatibility prediction was carried out. The results show that when the electrified railway meets the requirements of Secondary Surveillance Radar site protection, the electrified railway will not affect the normal operation of the Secondary Surveillance Radar. The findings provide advice and data support for electromagnetic compatibility issues in electrified railway and civil aviation airport areas.