摘要
针对传统的接触网直流供电系统漏电检测方法中存在检测死区、母线对地电压偏离度过大等问题,提出了一种基于平衡电桥法与切换电桥法的新型漏电检测方法;分析了该方法的检测原理,从降低母线对地电压偏离度的角度出发,建立了平衡电阻与切换电阻的计算模型。Simulink仿真结果表明,该方法能够很好地降低母线对地电压的偏离度,提高了供电系统的稳定性。
In view of problem of traditional leakage detection method of DC power supply system in overhead line system that it has detection dead zone and big voltage deviation between bus and ground,a new kind of leakage detection method based on balancing bridge method and switching bridge method was proposed.Detection principle of the method was analyzed and computational model of balancing resistors and switching resistors were established from the perspective of lowering voltage deviation between bus and ground.The Simulink simulation results show that the new method can reduce voltage deviation between bus and ground,and improve stability of the power system.
出处
《工矿自动化》
北大核心
2015年第5期63-67,共5页
Journal Of Mine Automation
基金
国家高技术研究发展计划(863计划)项目(2013AA06A411)
关键词
直流供电系统
漏电检测
平衡电桥法
切换电桥法
电压偏离度
DC power supply system
leakage detection
balancing bridge method
switching bridge method
voltage deviation
