摘要
110 kV变电站10 kV线路故障,重合于故障时主变差动保护动作。利用故障波形并辅之以电流回路图分析,展现故障全过程,最终确定故障点。为小电阻接地方式下主变差动保护异常动作提供经验参考。
During a failure of the 10 kV line in a 110 kV substation, the main transformer protection will take action if a coincidence happens during the failure. With the fault waveform and the analysis of the current circuit diagram, the whole process of the failure is shown and ultimately the point of the failure is determined. This can provide experience for reference for the malfunction of the main transformer protection, on the condition of little resistance grounding.
出处
《江苏电机工程》
2013年第5期13-14,18,共3页
Jiangsu Electrical Engineering
关键词
异地相间故障
主变差动保护
小电阻接地
Z型接地变
the main transformer protection
remote phase fault
little resistance grounding
Z-grounding transformer
