摘要
本文针对高铁车站绝缘节和相邻钢轨烧损的现象,采用模拟测试方法,结合理论分析,对其形成原因和机理进行研究。通过模拟站内回流切断点处的线路及列车运行环境,设计室内模拟测试方案,取得了较全面的电压电流数据及相关特性,根据现场观测、测试数据和现象与电弧模型和特征的对比,确认由于电弧高温而造成绝缘节及钢轨烧损。根据电弧机理和测试分析,简述电弧对钢轨和绝缘节的危害,并对产生电弧的原因进行初步分析。从优化牵引电流切断点设置、研究其对轨道电路传输的影响、减小绝缘节两侧钢轨电位差、改进绝缘节材料性能等方面,提出防止绝缘节由于电弧烧损的对策。
Focusing on the burning and damaging phenomenon of mechanical joints and adjacent rails in high- speed railway stations, the paper tried to find its source and mechanism with the simulation method and by the- oretical analysis. The indoor simulation test was designed by simulating the actual line and train running envi- ronments at cutting points of station traction currents to obtain overall data of voltages and currents and their correlation characteristics. It was ascerlained through comparison of field observation and test data and phe- nomena with the arcing model and arcing characteristics that high arc temperature caused burns and damages to insulation joints and rails. On the basis of introducing the mechanism of arcing and analyzing the test results, the harm arcs did to rails and joints was briefly illustrated and the reasons to generate arcs were analyzed pre- liminarily. The measures to prevent joints from being burned and damaged were proposed in respect of optimi- zing setting of cutting points of traction currents, investigating the influence of arcs on transmission of track circuits, lowering the difference of electric potentials of rails on both sides of joints and improving performance of joint materials.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2013年第10期82-88,共7页
Journal of the China Railway Society
基金
铁道部科技研究开发课题(2011X025-F)
关键词
绝缘节
钢轨
电弧
牵引电流
高速铁路
模拟测试
insulated joint
rail
electric arc
traction current ~
high-speed railway
simulation test
