摘要
分析了牵引馈线非金属性短路电流(尤其是电弧性短路电流)和机车过断电区充电电流的变化特征。采用电流上升率作为启动元件检测的主保护判据,并针对以上变化特征提出应用电流累积和监测作为保护判据,两者结合实现地铁直流馈线保护方案;并以该保护方案为基础开发出微机保护装置。
The variation characteristic of traction feeder nonmetal short current, especially arcing short current, and the charge current which locomotive crosses the power-off area were analyzed. The main protection judge- ment for starting component test was rise rate of current. Aiming at the above characteristic, it was proposed that current cumulative-sum monitoring was used as protection judgement. The protection scheme for metro DC feeder was implemented by combining the both. The microcomputer-based feeder protection device based on the proposed scheme was developed.
出处
《低压电器》
北大核心
2009年第11期17-20,35,共5页
Low Voltage Apparatus
关键词
直流牵引供电系统
馈线保护
电流上升率
DC traction power supply system
feeder protection
rise rate of current
