中国电机工程学报2016，Vol.36Issue(2)：554-562,615,10.DOI:10.13334/j.0258-8013.pcsee.2016.02.029
高铁信号系统多芯扭绞电缆宽频建模研究
Research on Wideband Modeling of Multi-core Twisted Cables Utilized for High-speed Railway Signaling Systems
摘要
Abstract
In order to study transient overvoltage characteristics of multi-core twisted cables utilized for high-speed railway signaling systems, the deficiencies of the available cable transient modeling were analyzed and an improved modeling method was proposed. This improved modeling method was performed in two steps: cascade transmission line parameter calculation for a length of one twist cycle and the wideband equivalent model of multi-conductor transmission lines for multi-core twisted cables in the time domain. This modeling method considers the influence of the proximity effect and skin effect among the core wires as well as the twisted features of the cable. As a validation, the experiment of the transfer impedance and transmission characteristics under lightning impulse was conducted. It shows good correspondence between simulations and experiments. The wideband model for multi-core twisted cables of two star quads was established. In addition, the effects of several important factors influencing the magnitude of the lightning transient overvoltage were analyzed. The basic characteristics were as follows: The cable shields grounded at both ends can significantly limit the transient over-voltage amplitude of cable wires. The spare wire shorted to ground will reduce the open-circuit transient voltage of active wires.关键词
高速铁路/多芯扭绞电缆/暂态过电压/多导体传输线/矢量匹配/宽频建模Key words
high-speed railway/multi-core twisted cable/分类
信息技术与安全科学引用本文复制引用
向念文,陈维江,李成榕,陈家宏,谷山强,徐宗奇..高铁信号系统多芯扭绞电缆宽频建模研究[J].中国电机工程学报,2016,36(2):554-562,615,10.基金项目
国家自然科学基金(U1134106) （U1134106）
铁道部重大科技研究开发计划项目(2011T008). Project Supported by National Natural Science Foundation of China(U1134106) （2011T008）
Project Supported by the Railways Ministry of China(2011T008). （2011T008）
