基于变压器励磁涌流成因的涌流抑制策略  

Controlling strategy to restrain excitation inrush current of transformer based on its cause

作　　者：乌云高娃[1,2] 刘涤尘[2] 叶念国 

机构地区：[1]深圳职业技术学院 [2]武汉大学电气工程学院 [3]深圳市智能设备开发有限公司

出　　处：《武汉大学学报（工学版）》2008年第6期83-86,共4页Engineering Journal of Wuhan University

摘　　要：变压器在投入电网运行之前其磁路剩磁与上次切出电网时的分闸角有关,以此为出发点,在反磁化曲线的基础上,阐述了剩磁极性与变压器前次切出时分闸角的关系,提出了结合磁性材料的磁特性,利用偏磁与剩磁相抵消来抑制励磁涌流的方法,并给出通过选择分、合闸角使得偏磁极性与剩磁极性相反,两者互相作用从而使得总磁通不会超过饱和磁通来抑制变压器励磁涌流的空投合闸角控制策略.Before entering circuit, the transformer＇s residual flux of magnetic-circuit is related to cutting phase of latest power-off; and based on the anti-magnetization curve, this relation is explained. The method for restraining excitation inrush current is put forward by combined with the magnetism of magnetic material. Finally, the entering phase controlling strategy to restrain the excitation inrush current of no-load transformer entering the power system by controlling entering phase and cutting out phase, is put forward.

关 键 词：励磁涌流 剩磁 偏磁 控制策略 

分 类 号：TM406[电气工程—电器]