摘要
全并联AT牵引网是我国高速电气化铁路供电系统中重要的供电架构,其快速精确的故障定位对保障电气化铁路安全畅通运行具有重要意义。在全并联AT牵引网发生故障短路的情况下,通过测取短路故障行波的波头到达时间以及行波测距原理,找出线路的故障位置。根据全并联AT牵引网的架构特点,采用D型双端行波测距法,通过误差较小的北斗卫星导航系统同步时钟实现数据的同步采样,并根据小波变换的信号奇异性检测原理和模极大值理论对两端测得的行波信号进行数据处理,有效解决了行波波头的识别和提取问题。通过仿真实验验证,得出的结果与实际故障位置相差不大,能够实现线路的快速精准定位。
Parallel AT traction network is an important power supply structure in China’s high-speed electrified railway power supply system.Its fast and accurate fault location is of great significance to ensure the safe and smooth operation of electrified railway.In this paper,the fault location of the whole parallel AT traction network was found by measuring the arrival time of the traveling wave of the short-circuit fault and the principle of traveling wave ranging.According to the structure characteristics of full parallel AT traction network,this paper adopted D-type two-terminal traveling wave ranging method,realized synchronous sampling of data by synchronous clock of Beidou satellite navigation system,and processes data of traveling wave signals measured at both ends according to singularity detection principle of wavelet transform and modulus maximum theory,which effectively solved the problem of identification and extraction of traveling wave heads.The simulation results show that there is little difference between the results and the actual fault location,which can achieve fast and accurate line location.
作者
贺凤珂
陈保平
安晓静
王艺霏
He Fengke;Chen Baoping;An Xiaojing;Wang Yifei(School of Electrical and Electronic Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《石家庄铁道大学学报（自然科学版）》
2020年第3期72-77,共6页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
关键词
全并联AT牵引网
故障测距
D型行波
北斗卫星导航系统
小波变换
full parallel AT traction network
fault location
D-type traveling wave
Beidou satellite navigation system
wavelet transform
