摘要
为了保证变压器安全运行,防止空载合闸时励磁涌流造成的误动,针对当今常用的变压器励磁涌流检测方法存在的缺陷和不足,提出了一种新的变压器涌流畸变度检测方法,即利用涌流畸变产生的高次谐波来检测励磁涌流。算例仿真验证,该方法能够可靠区分励磁涌流和故障电流,防止了变压器差动保护的误动和拒动。
In order to guarantee the safe operation of transformers,and to prevent them from the malfunction caused by inrush current under the situation of no- load closing,the paper proposed,aiming at the defects of the common detecting method for transformer inrush current,a new method for detecting the distortion of transformer inrush current. It is a method that uses the high harmonics generated by inrush distortion to detect inrush current. The simulation example proves that this method is able to distinguish inrush current from fault current so as to prevent malfunction and misstrip of transformer differential protection.
出处
《黑龙江电力》
CAS
2015年第6期512-514,519,共4页
Heilongjiang Electric Power
关键词
变压器
励磁涌流
畸变度
transformer
inrush current
degree of distortion
