特高压线路对对空雷达站电磁干扰的防护间距

Guard Spacing of the Air Surveillance Radar Station to Ultrahigh Voltage Transmission Lines

根据国家标准,我国现有输电线路与对空雷达站间的防护规范所涉及到的电压等级为500kV及以下,缺乏针对特高压等级线路的防护间距设计与施工依据.为此,从雷达探测功率损耗角度出发,通过建立特高压线路与雷达站防护间距的数学求解模型,对铁塔塔型、一定线路长度下的铁塔基数以及雷达入射波角度进行了分析,并分别求解了在这3种变量因子影响下的雷达探测功率损耗随两级系统间的距离变化时的规律.结果表明,影响雷达探测功率损耗的主要因子是一定线路长度下的铁塔基数和雷达入射波角度.根据研究结果,建议雷达站与特高压输电线路防护间距设定在1.9~2.1km范围内较为合理.

According to the national standard,the voltage levels involved in the protection norms of existing transmission lines and radar stations in China are 500 kV and below,so there is a lack of protection spacing design and construction basis for ultrahigh voltage level lines.Therefore,based on the power loss of radar detection,the towers＇ type,the towers＇ number which is based on a certain length of line and the angle of radar incident wave are analyzed by establishing the mathematical solution model of guard spacing between ultrahigh voltage transmission line and radar station.The law of the power loss of radar detection under the influence of these three variable factors varies with the distance between the two systems.The results show that the main factor affecting the power loss of radar detection is the tower base and radar incident wave angle under a certain line length.According to the research results,it is reasonable to suggest that the guard spacing between radar stations and ultrahigh voltage transmission lines should be set within the range of 1900 m-2100 m.