摘要
接触网是支撑电气化铁路运行的核心装备,由于接触网系统的鲁棒性研究与故障监测诊断需要大量且不同类别的故障特征数据,但该数据难以从铁路的运营现场大量获得,因此,通过有效的仿真模拟生成可信的故障数据,是从理论上研究接触网故障的有效手段。基于有限元方法,利用受力等效的方式模拟接触网的各类故障,搭建相应的仿真模型并建立故障仿真平台,从而通过平台生成大量的接触网故障仿真数据,解决了故障数据获取困难的问题。根据故障的机理特征以及数学特征将故障模型分为五类,建立不同故障类型的等效方法,提出平台主要架构,完成接触网参数输入、静态求解、动态求解、数据分析四大功能模块。算例计算了在指定位置的吊弦断裂与定位器钩环脱落发生时,接触网在短时间内的动态响应,当发生吊弦故障时,故障处的加速度变化最大,随着时间的变化呈现衰减趋势,距离故障位置越远,垂向振动越不明显;当发生钩环故障时,拉出值方向加速度变化明显,线路方向和垂直方向变化波动较小,说明该平台能够在接触网故障诊断中提供相关的定性与定量结论,为接触网系统设计、故障诊断识别提供理论支持。
Overhead Contact System(OCS)is the core equipment supporting the operation of electrified railway.Due to the need of robustness research and fault monitoring and diagnosis of OCS,a large number of different types of fault characteristic data are required,but this data is difficult to obtain from the railway in operation.Therefore,generating credible fault data through effective simulation is an effective means to study OCS fault in theory.Based on finite element method,using the force equivalent method to simulate all kinds of OCS faults,build the corresponding simulation model and establish the fault simulation platform,so as to generate a large number of OCS fault simulation data through the platform,which solves the problem that it is difficult to obtain fault data.According to the mechanism and mathematical characteristics of the fault,the fault model is divided into five categories,the equivalent methods of different fault types are established,the main framework of the platform is proposed,and the four functional modules of OCS parameter input,static solution,dynamic solution and data analysis are completed.The calculation example calculates the dynamic response of the OCS in a short time when the suspension string breaks and the shackle of the locator falls off at the specified position.It is found that when the suspension string fault occurs,the acceleration at the fault changes the most,and shows a attenuation trend with time.The farther away from the fault location,the less obvious the vertical vibration is.When the shackle fault occurs,the acceleration in the pull-out direction changes significantly,and the changes in the line direction and vertical direction fluctuate less,It shows that the platform can provide relevant qualitative and quantitative conclusions in OCS fault diagnosis,and provide theoretical support for OCS design,fault diagnosis and identification.
作者
田升平
张学武
关金发
陈俊卿
TIAN Shengping;ZHANG Xuewu;GUAN Jinfa;CHEN Junqing(State Key Laboratory of Rail Transit Engineering Information(FSDI),Xi'an 710043,China;School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)
出处
《铁道标准设计》
北大核心
2023年第12期176-181,共6页
Railway Standard Design
基金
中国铁建股份有限公司科技重大专项课题(18-A02)。
关键词
电气化铁路
仿真平台
故障模型
故障模拟
动态响应
接触网
electrical railway
simulation platform
fault model
fault simulation
dynamic response
OCS
