摘要
通过建立直流牵引回流钢轨电位的等效模型,分析其基本特征及影响因素,某一点的钢轨电位呈现明显的交变特性。合理设置直流牵引供电系统网络参数和优化列车运行图以调整列车电流的时空分布,是控制钢轨电位的有效措施。结合现行规范分析钢轨电位设计标准在执行中的困惑,提出钢轨电位的评价应以确保电压作用人体安全为基本出发点,体现电压幅值及其时间持续效应,不应仅规定峰值电压。
In order to analyze the basic characteristics and its influencing factors of the rail potential of DC Traction Power Supply System,the mathematical model of rail potential is established. The author observes that the rail potential of a certain point presents obvious alternating characteristics. A reasonable set of traction power supply system network parameters and the optimal train current temporal- spatial distribution by adjusting the working diagram for the trains are effective measures to control the rail potential. After analyzing the confusion caused by the existing norms of the rail potential design standards,the author proposes that the evaluation of rail potential should reflect the voltage amplitude and its time duration based on the insurance of the human voltage security,and that it is not enough when the provisions of the peak voltage is satisfied.
出处
《都市快轨交通》
北大核心
2015年第5期91-94,共4页
Urban Rapid Rail Transit
基金
中国铁路总公司科技研究开发计划项目(2014 J009-B)
关键词
直流牵引供电系统
钢轨电位
安全电压
DC Traction Power Supply System
rail potential
voltage security
