ZPW-2000轨道电路的多轮对动态分路建模研究

Research on dynamic multi-wheel sets shunted track circuit modeling

针对现有ZPW-2000轨道电路单轮对分路模型难以反映列车真实分路情况的问题,提出一种轨道电路多轮对动态分路建模方法。根据实际列车分路情况下轮对与补偿电容和轨道区段的相对位置关系,分别推导出轮对间和收发端间的传输矩阵,最终建立列车由驶入至出清轨道电路区间的轨道电路多轮对动态分路模型。在ZPW-2000型轨道电路实验台上测取钢轨的一次参数并进行列车分路实验,将模型仿真数据与列车分路数据进行对比分析,分析多轮对分路模型轮对数量对仿真数据和模型性能的影响。研究结果表明:多轮对分路模型分路轮对数越接近实际分路情况,模型的精确性越高,验证了本文建模思想和模型的正确性。模拟2种常见的轨道电路故障,相对于现有单轮对模型,本文模型能够更好地模拟轨道电路工作情况,可为故障诊断研究提供更高质量的数据支持。

Aiming at the shortcomings that ZPW-2000 track circuit single-wheel-shunt model is difficult to reflect the real shunted situation,a new modeling method of track circuit based on dynamic multi-wheel sets shunting was proposed in this paper.Based on the positional relationship of the wheelset,the compensation capacitor and track section,the transmission matrix of wheel sets,transmitter and reciever was deduced.Finally,the dynamic multi-wheel sets shunted model in the process of entering and pulling out the track circuit was established.Primary parameters and shunted test data was measured on ZPW-2000 test bed,and the influence of quantity of shunted wheel sets on simulated data and model<file:///C:\Users\wei\AppData\Local\youdao\DictBeta\Application\7.0.0.2017\resultui\dict\result.html?keyword=model>performance<file:///C:\Users\wei\AppData\Local\youdao\DictBeta\Application\7.0.0.2017\resultui\dict\result.html?keyword=performance>was analyzed through the the comparative analysis of the simulated data and test data.As a result,the nearer quantity of shunted wheel sets on multi-wheel sets shunted model approximates to real shunted condition,the higher accuracy of model is,the modeling idea and validity of multi-wheel sets shunted model in this paper is verified.Two kinds of track circuit fault were simulated.The results shows that compared with the single-wheel set shunted model,multi-wheel sets model matches the practice better and provides more accurate data to support fault diagnosis of track circuit.