摘要
为解决电气化铁路中因漏泄同轴电缆(以下简称为"漏缆")直流隔断器设置不当而导致其损坏的问题,开展铁路直流隔断器设置方案的研究。首先计算静电感应电压和电磁感应电压的大小,给出计算示例;分析直流隔断器设置的必要性和作用;最后通过方案比选提出了建议的设置方案。每隔500~750 m在漏缆一端设置直流隔断器,阻断直流和低频电流通过漏缆,防止漏缆上的电磁感应电压超过规范的限定值;漏缆另一端接地,对静电感应进行防护和消除,保证人身和设备安全。
To solve the problem of damages to DC breaker of leaky coaxial cable（LCX） due to improper setting and installation of DC breaker in electrified railways,setting schemes of DC breaker are studied.Firstly,the electrostatic induction voltage and electromagnetic induction voltage are calculated,and examples are presented.Secondly,the necessities and functions of DC breaker are analyzed.Finally,recommended setting scheme is proposed after comparison.One DC breaker is installed at one end of the LCX each every 500 - 750 meters to prevent DC and low frequency current from passing through the LCX and to avoid the electromagnetic induction of the LCX exceeding the limit specified in the corresponding standards.The other end is grounded to prevent and eliminate electrostatic induction for the protection of people and equipment.
作者
刘立海
LIU Li-hai(China Railway SIYUAN Survey and Design Group Co.,Ltd. ,Wuhan 430063,Chin)
出处
《铁道标准设计》
北大核心
2018年第3期144-148,共5页
Railway Standard Design
基金
国家重点研发计划(2016YFB1200100)
铁道部科技研究开发计划(铁建科字(2012)-8)
关键词
电气化铁路
直流隔断器
漏泄同轴电缆
牵引网
静电感应
电磁感应
Electric rai lway
DC breaker
Leaky coaxial cable （LCX）
Traction network
Electrostatic induction
Electromagnetic in duction
作者简介
刘立海（1974-）,男,教授级高级工程师,2006年毕业于香港城市大学电子工程系,博士,E-mail：isaacllh@hotmail.com.
