摘要
城市轨道交通装备的中低压双向直流接触器带负载分断性能,故对灭弧技术提出很高要求,其中对临界电流的分断是技术难点。针对双向直流工况,详细阐述了传统灭弧方式和新型灭弧方式的灭弧原理和优缺点,着重介绍了新型灭弧方式不同外加磁场布置的特殊作用。通过模拟试验比较了部分灭弧方式的燃弧时间,并评价了采用不同灭弧方式接触器的性能及适用性。模拟试验结果及评价结果均表明,新型灭弧方式具有更好的灭弧性能,是双向直流接触器的更好选择。
The breaking capacity with load of medium-low voltage bi-directional DC contactors is putting forward high demand for arc-blowout technology,of which the critical current breaking is the technical difficulty.Targeting the working condition of bi-directional DC,the principle,merits and demerits of the conventional and new arc-blowout solutions are expounded.The difference of the new arc-blowout solution and the special function of external magnetic field are introduced emphatically.The arc burning time of some arc-blowout solutions are compared through simulation experiments.The perfor-mance and applicability of contactors adopting different arc-blowout solutions are evaluated.Simulation experiment results and evaluation results show that the new arc-blowout solution performs better,and is a better choice for bi-directional DC contactors.
作者
李宏
LI Hong(Xi′an Schaltbau Electric Co.,Ltd.,710100,Xi′an,China)
出处
《城市轨道交通研究》
北大核心
2022年第4期186-189,共4页
Urban Mass Transit
关键词
城市轨道交通
双向直流接触器
灭弧方式
urban rail transit
bi-directional DC contactor
arc-blowout solution
作者简介
李宏,高级工程师。
