铁路轨道电路补偿电容故障定位的仿真研究

Simulation Analysis of Location of the Compensation Capacitor with Fault on Track Circuit

研究优化测试补偿电容故障,保证信号传输安全,由于补偿电容易受环境,天气、浪涌电压等因素影响,经常发生故障,常规的检查补偿电容故障的方法耗时长且劳动强度大。为了更加快速准确地定位故障补偿电容,提出了一种新的故障定位方法,即基于均匀传输线理论,运用补偿电容四端网级联结构的无绝缘轨道电路模型,重点仿真研究了不同位置的补偿电容分别发生故障时,分路电流和从输入端看往接收端输入电阻受到影响的规律特征。仿真结果表明,故障定位方法快速准确,为及时发现和定位补偿电容故障,保证信号传输安全提供了参考依据。

As being vulnerable to environmental,weather,surge voltage and other factors,compensation capacitor often fails,and the conventional method of checking fault compensation capacitors is time consuming and labor-intensive.In order to locate the fault compensation capacitor more quickly and accurately,this paper presented a new fault location method.In this paper,based on transmission-line theory and jointless track circuit with cascade form of compensation capacitor four terminal networks,the simulation analysis of influence on track circuit signal transmission was carried out under the typical fault mode of compensation capacitor,and we have find the law of influence on the short circuit current and the impedance seeing from sending end to receiving end from compensation capacitor with fault at different location.Simulation results show that the new method is rapid and accurate for detecting and locating faults,and provides a reference for finding and locating the compensation capacitor failure and ensuring the safety of signal transmission.