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li ci yong liu dui bian ya qi cha dong bao hu de ying xiang ji li ci yong liu pan bie fang fa
Author(s): 
Pages: 26-30
Year: Issue:  5
Journal: Electrical Manufacturing

Abstract: <正>差动保护作为变压器电量保护中的主保护可以灵敏地区分变压器的区内和区外故障,但是在空载投入变压器及外部故障切除后电压恢复时,可能会出现数值可观的励磁涌流,导致差动保护误动。尤其是三相变压器进行空载投入时,由于三相接入初始相位各不相同,励磁涌流不可避免。因此,如何鉴别变压器励磁涌流和内部故障电流显得尤为重要。
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