【摘要】 在牵引网分段供电技术基础上,提出基于双端电气量的高速铁路牵引网故障测距方法。采用广义对称分量法,通过建立牵引网复合序网模型,分析短路阻抗特性,绘制出AT牵引网测量阻抗特性曲线,给出故障测距算法与实现流程。仿真结果表明,与既有方案相比,该测距方法有效且测距精度高,为现有高速铁路牵引网故障测距提供了新途径。更多还原

【Abstract】 All paralleling AT power supply scheme has been widely used in high-speed railway in China due to lots of advantages. The fault location is the key problem in practical application and how to improve the accuracy of fault location has drawn more and more attention. Based on the segmented power supply technology for traction network, the fault location method of high-speed railway traction network using two-terminal electrical quantities was proposed in this paper. By virtue of the generalized method of symmetrical components, the sequence network model of traction network was established and the characteristics of short circuit impedance were analyzed. Furthermore, the impedance characteristic curves of AT traction network were presented and the process of fault location was illustrated. Simulation results indicate that the method proposed is efficient and has higher accuracy compared with the existing schemes, which can be used in traction network fault location for high speed railway.更多还原