关角隧道内牵引供电与回流系统综合测试与分析

Integrated Test and Analysis of Traction Power Supply and Reflux System of Guanjiao Tunnel

以青藏铁路西格线关角隧道为例,结合隧道电气结构与布置方式,计算牵引供电系统主要参数,提出牵引供电与回流系统测试方案,测试牵引负荷特性、钢轨电位、钢轨电流和土壤电阻率,对牵引负荷过程和牵引回流分布进行同步测试,分析牵引负荷、钢轨电流和钢轨电位分布规律。同时,针对牵引回流特性进行分析,主要技术参数满足相关标准与规范,为青藏铁路电气化区段的安全运营提供重要保障。

By taking Guanjiao Tunnel of Xining-Golmud Section of Qinghai-Tibet Railway as an example, the paper proposes the test plan for traction power supply and reflux system based on the electrical structure and arrangement of the tunnel and calculation of main parameters of traction power supply system. The tests include traction load characteristics, rail potential, rail current and soil resistivity. The tests for traction load and traction reflux distribution are conducted simultaneously to analyze the distribution roles of traction load, rail current and rail potential. Besides, the paper analyzes the characteristics oflraction reflux and indicates that the main technical parameters meet the related standards and norms, guaranteeing safe operation of electrified section of Qinghai-Tibet Railway.