郑州大学学报（工学版）2013，Vol.34Issue(1)：70-74,5.DOI:10.3969/j.issn.1671-6833.2013.01.017
雷击接触网对信号电缆电磁影响分析及防护
Analysis and Protection of Lightning Catenary Electromagnetic Impact on the Signal Cable
摘要
Abstract
The signal cable was interfered by the lightning current mainly via the space inductive coupling and the earth resistive coupling when we analyzed the way that lightning current acted on the signal cable. According to the catenaries model of the route, electromagnetic transient software ATP-Draw was used to establish lightning catenaries insulator flashover lightning current propagation simulation circuit. Studies have shown that; Cable sheath current coupling led to over voltage and the earth resistive coupling caused the potential rise, and both factors have the biggest influence on signal cable. While contact line, protection line and through ground line current coupled to the cable core voltage is small, signal cable core over voltage along with the increase of grounding resistance increases. By reducing the signal cable grounding resistance, separate set of earth electrode and other measures to improve the lightning interference on the signal cable. References to catenary lightning strengthen the implementation program of Beijing-Shanghai high-speed railway; this paper also analyzes the height of ground wire erected, and gives advice erection height to improve the catenary lightning withstand level.关键词
雷电流/耦合/信号电缆/接地电阻/地电位升/避雷线Key words
lighting current/coupling/signal cable/grounding resistance/potential rising on earth/ground wire分类
交通工程引用本文复制引用
徐迎辉,闫智,罗映红..雷击接触网对信号电缆电磁影响分析及防护[J].郑州大学学报（工学版）,2013,34(1):70-74,5.基金项目
甘肃省科技计划资助项目(1112RJZA046) （1112RJZA046）
