摘要
主要介绍变电所高速直流断路器增量保护原理以及车辆高速直流断路器保护原理,并将两者跳闸情况进行比较分析。实践证明,车辆上的大电流脱扣保护跳闸不仅与其整定值有关,还与初始电流上升率密切相关,车辆上的大电流脱扣和变电所直流断路器增量保护是两种不同的保护,不能将两者作为同一种保护进行整定配合计算。除在调试车辆时注意减少车辆本体故障及人为误操作外,同时希望增加车辆断路器的保护种类,达到真正意义上的保护匹配。
This article introduces the theory of the increment protection for high - speed DC circuit breakers in transformer substations and the protection for high - speed DC circuit breaker on trains, conducting a theoretic analysis and comparison between these two kinds of protective tripping. As indicated by practice, the high current tripping on trains is related not only to its set value, but also the rate of current rise. These two protections are not the same, so we cannot perform set cooperation calculation. We should pay attention to reducing breakdowns on trains during debugging and under man - made wrong operation, at the same time, to providing more protection types of high - speed DC circuit breaker on trains.
出处
《都市快轨交通》
2006年第4期76-79,共4页
Urban Rapid Rail Transit
关键词
高速直流断路器
初始电流上升率
增量保护
high - speed DC circuit breaker
initial rate of current rise
increment protection
