当前无人机诱骗设备发射的GPS欺骗信号对变电站自动化系统的安全问题尚未明晰.为此提出了一种全球定位系统(global positioning system,GPS)欺骗信号对变电站时间同步装置的干扰评测方法,理论分析了GPS欺骗信号对变电站时间同步装置的影响.测量了无人机诱骗设备在不同发射功率下的欺骗信号功率强度及电场强度空间分布,实验验证了GPS欺骗信号对时间同步装置接收卫星质量与授时精度的影响,分析了无人机诱骗设备的发射功率以及其与时间同步装置GPS/北斗卫星导航系统(Bei-Dou system BDS)接收天线间的距离对授时精度的影响规律.结果表明:时间同步装置天线距离无人机诱骗设备10 m以外,GPS诱骗信号不会使时间同步装置进入守时状态;时间同步装置天线距离无人机诱骗设备60 m以上,GPS诱骗信号对时间同步装置的影响可忽略不计,为变电站安全稳定运行提供了参考依据.
Analysis and Test of the Interference of GPS Deception Signal on Time Synchronization Device in Substation
The security problem of the global positioning system(GPS)deception signal transmitted by unmanned aerial vehicle(UAV)to the automatic system in the substation is not clear.This paper proposes a method to evaluate the interference of GPS deception signal to the time synchronization device of substation,and theoretically analyzes the influence of GPS deception signal on the time synchronization device of substation.The spatial distribution of deception signal power intensity and the electric field intensity of unmanned aerial vehicle decoy equipment under different transmitting power are measured.The experiment verifies the influence of GPS deception signal on the quality of the satellite received by the time synchronization device and the accuracy of time service.The influence laws of the transmitting power of the unmanned aerial vehicle decoy equipment and the distance between it and the GPS/BeiDou navigation satellite system(BDS)receiving antenna of the time synchronization device on the time service accuracy are analyzed.The results show that the GPS decoy signal will not make the time synchronization device enter the punctual state when the antenna of the time synchronization device is 10 m away from the unmanned aerial vehicle decoy device.The antenna of the time synchronization device is more than 60 m away from the unmanned aerial vehicle decoy equipment,and the impact of GPS deception signal on the time synchronization device can be ignored,which provides reference for safe and stable operation of substation.
万方数据
维普
