励磁涌流对差动保护的影响及其对策  

Analysis and Countermeasure of Mal-operation in Differential Protection Caused by Magnetizing Inrush

作　　者：岳志刚[1] 杨国旺[2] 曲艳华[2] 

机构地区：[1]盐城市供电公司,江苏盐城224001 [2]华北电力大学电力工程系,河北保定071003

出　　处：《高压电器》2005年第1期48-50,共3页High Voltage Apparatus

摘　　要：为了解决变压器差动保护由于励磁涌流而经常误动作的问题,对励磁涌流进行了特征分析,指出当前防止差动保护误动作原理的不足,阐述了利用磁通特性原理区分励磁涌流的方法,分析结果表明,该方法能够可靠地识别变压器内部故障。In order to resolve the mal-operation problem in differential protection caused by magnetizing inrush, this paper analyzes the characteristic of magnetizing inrush, points out the shortcoming in the principle of the differential protection for anti-malfunction, puts forward a method for distinguishing magnetizing inrush based on the magnetic flux characteristics principle. The results of analysis demonstrate that the method is able to identify the internal fault reliably.

关 键 词：变压器 励磁涌流 差动保护 

分 类 号：TM411[电气工程—电器]