管制中心天馈线系统雷电暂态效应仿真分析

针对管制中心天馈线系统的3种防雷保护形式,运用电磁暂态分析程序(ATP-EMTP)的线路分散元件建立了它们的等效电路模型,分析了无保护、单个保护间隙和双保护间隙下雷电流对天线馈线系统的冲击特性,理论分析和仿真结果表明,滤波器入口电压、放电时间受保护间隙、放电电压等因素的影响较大.采用双保护间隙可有效降低滤波器入口电压峰值,缩短放电时间,保护滤波器及后续设备不受直击雷损害.该结论具有实用推广意义.

Simulation Analysis of Lightning Transient Effect on Antenna Feeder System in Control Center

In this paper,concerned with three types of lightening protection measures taken for the antenna feeder system in control center,the equivalent circuit model is set up by using the circuit discrete elements of the alternative transients program-elector-magnetic transient program（ATP-EMTP）,the impulse characteristics of lightening current on the antenna feeder system are analyzed in the case of no protection,single protective gap,and double protective gap.Theoretical analysis and simulation results demonstrate that the input voltage of the filters and discharge time are much affected by protective gap and discharge voltage,etc.And the peak voltage of the filter input can be effectively reduced,discharge time shortened and the filters along with following devices protected for not being damaged due to lightening,by employing double protective gap.The conclusions drawn are of availability and spreading use.