高速铁路牵引变压器后备距离保护  

Traction transformer backup distance protection for high-speed railway

作　　者：韩正庆[1] 许龙[1] 刘淑萍[1] 高仕斌[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电力自动化设备》2012年第6期27-30,50,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(50907055);四川省科技支撑计划资助项目(2011GZ0079)~~

摘　　要：研究了距离保护用作高速铁路牵引变压器后备保护时的相关问题。在介绍牵引变压器低电压启动过电流保护原理的基础上,分析了高速铁路末端故障或异相短路时低电压启动过电流保护可能无法起到后备保护作用。考虑到距离保护灵敏度高、线路运行方式对其动作影响小等优点,将距离保护用作高速铁路V/x牵引变压器的后备保护,借鉴了牵引供电系统馈线距离保护的经验,讨论了牵引变压器后备距离保护的动作特性、保护配置、阻抗计算等相关问题。数字仿真表明了距离保护作为牵引变压器高、低压侧后备保护的正确性。The principle of the traction transformer overcurrent protection with low-voltage startup is discussed,based on which,it is analyzed that,its low-voltage startup element may not operate correctly during the remote-end fault or out-of-phase short circuit fault of power supply system for high-speed railway. Since the distance protection has high sensitivity and is immune to line operating mode,it is taken as the backup protection of V/x traction transformer for high-speed railway. The experiences of traction feeder distance protection are referred and the operation features,configuration and impedance calculation of traction transformer backup distance protection are discussed. The simulative results show it is correct to take the distance protection as the traction transformer backup protection.

关 键 词：铁路 牵引变压器 电力系统保护 后备保护 距离保护 保护配置 

分 类 号：TM774[电气工程—电力系统及自动化] TM922.73