电力机车主变压器绕组短路保护策略研究  

Research on protection strategy of main transformer winding from short-circuit in electric locomotives

作　　者：宋安东 韩志业 李卫国 SONG Andong;HAN Zhiye;LI Weiguo(Technology Center of CRRC Datong Co.,Ltd.,Datong 037038,China)

机构地区：[1]中车大同电力机车有限公司技术中心,山西大同037038

出　　处：《铁道机车与动车》2021年第11期30-32,I0002,共4页Railway Locomotive and Motor Car

摘　　要：分析了主变压器原边短路、空载投入励磁涌流和变压器牵引绕组短路故障可能产生的瞬态冲击电流和稳态电流,在主变压器启动空载和带载稳态运行工况下,从稳态保护电流和瞬态保护电流多个角度对主变压器绕组短路故障状态提出相应保护策略,最后以某车型设计运行数据进行保护阈值计算进行验证。The paper analyzes the transient impulse current and steady-state current which may be caused by faults of short-circuit in main transformer primary side,no-load inrush current and the traction winding short-circuit in the transformer. From aspects of steady-state protection current and transient-state protection, the corresponding protection strategies are proposed for the short-circuit fault state of the main transformer windings under the starting no-load and load operation conditions.Finally, the protection threshold is calculated and verified on the basis of the design and operation data of a certain type locomotive.

关 键 词：励磁涌流 绕组短路 瞬态保护 稳态保护 

分 类 号：U264.36[机械工程—车辆工程]