高速铁路信号系统的雷电暂态模型研究  

Research of Lightning Transient Model for High-speed Railway Signal System

作　　者：乔志超 向念文 阳晋 张璐 QIAO Zhichao;XIANG Nianwen;YANG Jin;ZHANG Lu(Institute of Basic Equipment,Beijing National Railway Research&Design Institute of Signal&Communication Group Co., Ltd.,Beijing 100070,China;College of Electrical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]北京全路通信信号研究设计院集团有限公司基础院,北京100070 [2]华北电力大学电气工程学院,北京102206

出　　处：《铁道学报》2018年第9期90-96,共7页Journal of the China Railway Society

摘　　要：信号系统是高速铁路的控制中枢,也是容易遭受雷击的薄弱环节,为了实现信号系统防雷故障的定量分析,需要建立信号系统的雷击仿真模型。通过测试获得系统中设备的散射参数、进行导纳参数转换,采用矢量匹配法获得导纳函数的极点分布。利用电路综合理论建立系统的差模和共模雷电暂态仿真模型,并通过实验室暂态响应试验验证模型的有效性,仿真结果与试验结果误差在5%以内。基于该模型建立包括接触网在内的整个信号系统雷电暂态模型,分析雷击接触网时各信号设备的雷击过电压,并结合设备的绝缘耐受水平分析信号系统中雷电防护的薄弱环节,所获结果可以用于指导高铁信号系统的防雷设计和故障分析。Signal system,as the control center of high speed railway,is vulnerable to lightning strikes.In order to realize the quantitative analysis of lightning protection failure of the signal system,a lightning simulation model of the signal system is required.Firstly,the scattering parameters of the equipment in the system were obtained through testing,and were converted to the admittance parameters.Then the vector fitting method was applied for the extraction of the pole distribution of the admittance parameters.At last the differential-mode and common-mode lightning transient simulation model was established by applying the circuit synthesis theory,the validity of which was verified by the experimental transient response test.The simulation results were in good agreement with the experimental results,with the errors less than 5%.Finally,based on the model,the lightning transient model of the whole signal system that includes the catenary was established to analyze the lightning overvoltage and the weakness of the system under lightning strike based on this model and the insulation tolerance level of each equipment.The results obtained can be applied to guide the lightning protection design and fault analysis of the high-speed railway signal system.

关 键 词：高速铁路 信号系统 矢量匹配 雷电暂态模型 

分 类 号：U284[交通运输工程—交通信息工程及控制]