永久性故障对全并联AT供电距离保护的影响  

Influence on All-parallel AT Power Supply Distance Protection Caused by Permanent Fault

作　　者：李强[1] 宋琳琳[1] 李波[1] 尤志[1] 

机构地区：[1]西南交通大学电气工程学院

出　　处：《电气化铁道》2010年第5期21-23,28,共4页Electric Railway

摘　　要：根据全并联AT供电方式的特点提出了馈线保护策略。在该基础上,分析了上行发生永久性故障后系统恢复供电的过程,并且利用Matlab/simulink软件对每个过程进行了线路短路阻抗的仿真,研究了其对距离保护的影响。最后,提出根据AT变压器投入情况进行整定值切换的方法,以保证距离保护的可靠性。According to the characteristics of all-parallel AT（Auto-transformer） power supply system,presents feeder protection strategy.On the basis,analysis of the recovery process of the power supply after a permanent fault occurs,and makes use of Matlab/Simulink software to simulate each process of short circuit impedance,studies their impact on distance protection.Finally,put forward a protection scheme,which according to the condition of the AT transformer to switch the setting value,to ensures the reliability of distance protection.

关 键 词：全并联 AT供电系统 馈线保护策略 距离保护 仿真 

分 类 号：U223.82[交通运输工程—道路与铁道工程]