摘要
分析城市轨道交通工程中压供电网络的运行方式和发生故障时的特点,提出利用差动保护装置故障退出来触发相关过电流后备保护时间定值加速,保证区间故障的选择性;通过馈线、母联分段和出线电流保护启动闭锁进线电流保护的方法,实现母线故障的选择性和速动性。
The paper analyzes the operation mode of medium voltage power supply network for urban mass transit engineering and its characteristics when it fails, puts forward that the selectivity is guaranteed for sectional failures by triggering relative over-current backup protection time acceleration with exiting the failure of differential protection device; realizing the selectivity and prompt action of bus failure by activating the locking of incoming line current protection by means of segmentation of feeders and bus bar as well as the activating the outgoing line protection.
出处
《电气化铁道》
2014年第3期46-48,共3页
Electric Railway
关键词
中压供电网络
过电流保护
过电流后加速保护
母线故障保护
选择性
medium voltage power supply network
over-current protection
over-current acceleration protection
busfailure protection
selectivity
