摘要
钢轨运行电位异常及钢轨电位限制装置频繁动作是目前直流牵引供电系统运行中普遍存在的问题。通过建立钢轨电位数学模型分析表明,钢轨阻抗和回路电流是影响钢轨电位的主要因素。在运营维护过程中应注重确保钢轨回路的畅通,合理控制回路阻抗;可通过优化列车运行图控制最大回路电流,从而降低钢轨电位。对于钢轨电位特征及其保护配置方案需要结合系统运行实际作进一步研究。
Rail potential abnormal operation and frequent ac- tions of rail potential limiting device are commonly existing problems in DC traction power supply system currently. Through analyzing the established rail potential mathematical model, the rail impedance and the loop current are shown to be the main factors affecting the rail potential. In the operation and maintenance process, attention should be given to ensure the smooth rail circuit, the the loop impedance should be rea- sonably controlled. By optimizing the operation chart to con- trol the maximum loop current, rail potential could be reduced. The relationship between rail potential characteristics and pro- tection configuration scheme needs further research combined with the actual operation of the system.
出处
《城市轨道交通研究》
北大核心
2015年第6期46-48,共3页
Urban Mass Transit
关键词
地铁
直流牵引供电
钢轨电位
运行安全
Metro
DC traction power supply
rail poten-tial
safety operation
