直供方式回流系统故障诊断方法研究

Study on Fault Diagnosis Methods for Return Current System under Direct Power Supply

近年来牵引回流系统故障频发,对铁路供电、信号设备造成了严重危害。为对牵引回流系统的运行状态进行监视,并实现回流系统故障的快速诊断与定位以确保铁路安全运行,将运行的机车视为移动的激励源,对故障情况下机车经过故障点时变电所处的各路回流分配系数变化情况进行分析,确定回流系统故障的诊断判据,提出一种回流系统故障诊断与定位的方法,并通过搭建牵引回流系统仿真模型验证方法的可行性。

In recent years,frequent faults in traction return systems have caused severe harm to railway power supply and signal equipment.In order to monitor the operation status of the traction return system and realize the rapid diagnosis and location of the return system fault to ensure the railway safe operation,the running locomotive is regarded as the driving source of movement,analysis is made for the change of the return distribution coefficient of each circuit of the substation when the locomotive passes the fault point under the fault condition,and the diagnostic criteria of the return system fault are determined.A method of fault diagnosis and location of the return system is proposed,and the feasibility of the method by building a simulation model for the traction return system is verified accordingly.