基于VMD的ZPW-2000A型轨道电路复杂故障特征提取方法研究  

Study on ZPW-2000A Track Circuit Complex Fault Feature Extraction Method Based on VMD

作　　者：张帅 周游 赵少翔 Zhang Shuai;Zhou You;Zhao Shaoxiang

机构地区：[1]中铁工程设计咨询集团有限公司电化通号设计研究院信号所,北京100044 [2]中国铁路设计集团有限公司电化电信院信号所,天津300308 [3]兰州交通大学自动化与电气工程学院,兰州730070

出　　处：《铁道通信信号》2021年第10期1-5,共5页Railway Signalling & Communication

摘　　要：针对无绝缘轨道电路复杂故障特征难以准确识别的问题,提出一种基于VMD的故障特征提取方法。在详细分析ZPW-2000A型轨道电路原理的基础上,利用四端网络对其各部分进行建模,推导分路电流幅值包络表达式;仿真研究2类补偿电容和调谐区组合故障的类型,对比分析复杂故障下分路电流曲线特点;使用VMD对分路电流曲线进行分解,提取各分量信号的能量值作为故障特征。研究结果可以为轨道电路复杂故障的诊断提供可靠的基础依据。Aiming at the problem that it is difficult to accurately identify the complex fault features of jointless track circuit, a fault feature extraction method based on Variation Mode Decomposition(VMD) is proposed. Firstly, the four-terminal network is used to model its parts and the envelope expression of the amplitude of the shunt current is derived based on the analysis of the principle of ZPW-2000 A track circuit. Then, two types of combined faults of compensation capacitor and tuning zone are studied by simulation and the characteristics of shunt current curves under complex faults are compared and analyzed. Finally, the VMD is used to decompose the fault current curve and the energy values of each component signal are extracted as the fault features. The research results can provide a reliable basis for the diagnosis of complex fault of track circuit.

关 键 词：无绝缘轨道电路 故障特征 变分模态分解 分路电流 

分 类 号：U284.2[交通运输工程—交通信息工程及控制]