摘要
分析了220 kV变电站中110 kV出线故障引起母差保护误动的特殊情况。通过对其保护动作行为的详细分析,找出母差保护误动作原因是电流波形畸变,并针对这种情况提出了母差保护的改进措施以及处理此类事故的方法。
In this paper, a special case of bus differential protection caused by 110 kV outgoing line fault in 220 kV substation is analyzed. It is found that the cause of the differential protection action is the current waveform distortion through the detailed analysis of the protection action. And according to this circumstance, the differential protection improvement measures and the method to handle such accident are put forward in the end of the paper.
作者
张雪梅
吕湛
ZHANG Xuemei LYU Zhan(Dispatching and Control Center, State Grid Nanjing Power Supply Company, Nanjing 210019, China)
出处
《江苏电机工程》
2016年第5期88-89,100,共3页
Jiangsu Electrical Engineering
关键词
母差保护
线路故障
波形畸变
bus differential protection
line fault
waveform distortion
