基于Simulink的ZPW-2000轨道电路仿真分析

ZPW-2000 track circuit simulation analysis based on Simulink

轨道电路是我国铁路列车运行控制系统的关键设备之一,在此基于Simulink建立了ZPW-2000轨道电路仿真模型,并实现了轨道信号的调制与解调。在模型基础上,分析了室外环境及故障对轨道电路性能的影响。结果表明,道床电阻值降低至0.7Ω/km时,轨道电路"红光带"故障发生;3个及其以上补偿电容断线时,轨道电路将产生错误的占用信息;电气绝缘节破损会造成机车信号设备受到干扰,破损严重时列车会收到相邻区段的错误控制信息。仿真结果与现场测试数据的比较,验证了该模型的准确性,通过该文方法,可为铁路现场的维护及调试工作提供技术支持。

The track circuit is one of the key devices of China′s railway train operation control system.On the basis of Simulink,the simulation model of the ZPW?2000track circuit was established,and the modulation and demodulation of the track signal were realized.The impact of outdoor environment and fault on the track circuit performance is analyzed on the basis of this model.The results show that the″red light strip″fault of the track circuit occurs when the track bed resistance is lower than0.7Ω/km;when more than three compensation capacitors disconnect from the rail,the track circuit generates the wrong occupancy information;the cab signal equipment may be disturbed if the electrical insulation joint is broken,and the train may receive the false control information of the adjacent segment if the breakage is severe.The site test data is compared with the simulation result to verify the accuracy of the model.The method can provide the technical support for railway on?site maintenance and debugging.