励磁涌流对变压器差动保护的影响分析及对策探讨  

Analysis of the Influence of Magnetizing Inrush Current on Transformer Differential Protection and Its Solutions

作　　者：索娜[1] 郭丽娜[1] 刘士华 

机构地区：[1]郑州铁路职业技术学院,河南郑州450052 [2]国家电投集团河南电力有限公司,河南郑州450016

出　　处：《郑州铁路职业技术学院学报》2016年第2期21-24,共4页Journal of Zhengzhou Railway Vocational and Technical College

摘　　要：大型变压器在空载合闸或切除故障后恢复供电时,因为励磁涌流的存在,会导致变压器差动保护装置发生误动或拒动,从而影响电力系统的正常运行。分析变压器差动保护的工作原理,研究变压器励磁涌流产生的原因和特点,对比分析当前所采用的4种抑制励磁涌流的措施,为解决变压器保护装置的误动或拒动提供帮助。Absrtact：When a transformer is switched on without load or the power supply is restored after a fault , the in-rush current will lead to the differential protection device making a faulty action or refusing action sothat affecting the normal operation of equipment .The paper analyzes differential protection principle of the transformer , and develops the causes for the inrush current generated and its characteristics , analyzes contrastively four measures to restrain the excitation inrush current , in order to help resolving malfunction of protection equipment for transformer .

关 键 词：差动保护 励磁涌流 变压器 

分 类 号：TM771[电气工程—电力系统及自动化]