直供方式牵引网故障行波特征分析

Characteristic Analysis of Fault Generated Traveling Waves in Direct Feeding Traction Network

给出了适用于带有回流线直供方式牵引网的行波故障测距模型,分析了接触线对钢轨(大地)、接触线对回流线等不同类型故障产生的电压、电流行波特征以及行波在不同结构牵引线路上的传播规律。分析表明:各种故障均可产生可用于故障测距的行波信号,但锚段、站场分段、不等长回流线等特殊线路结构将延缓行波波头上升速度,增加了故障测距技术难度。仿真和现场实际数据验证了分析结果。

Based on fault generated travelling waves, a fault location model suitable for direct feeding traction network with return line is proposed. The characteristics of voltage and current travelling waves due to various fault types such as the fault between catenaries and earth or rail, the faults between catenaries and return line as well as the propagation characteristics of travelling waves along traction lines with different structures are analyzed. Analysis results, which are verified by both simulation and field tests, show that various types of faults can generate travelling wave signals suitable for fault location, however anchor section, railway segmented line, return lines with unequal lengths and so on detay the r^s~ug velocity of travelling wave head, thus such a delay makes the fault location based on fault generated travelling waves more difficult.