区外故障变压器差动保护误动原因分析与防治  

Analysis and prevention of transformer differential protection misoperation at out - area fault

作　　者：赵永彬[1] 景展[2] 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210003 [2]南京工程学院电力工程系,江苏南京210013

出　　处：《电力自动化设备》2004年第3期95-98,共4页Electric Power Automation Equipment

摘　　要：变压器发生区外故障后,在切断区外故障的瞬间,差动保护发生误动。从理论上分析差动保护误动的原因,并根据实际状况从硬件和软件方面提出解决的措施。保护人员在编制差动保护程序时,可以在软件方面提高差动保护区外故障保护的可靠性。When the breaker switches off at transformer out - area fault,transformer differential protection may act improperly.This phenomenon is theoretically analyzed and the countermeasures in both HW and SW are proposed according to the actual conditions.The reliability of differential protection for out - area fault can be improved by software programming.

关 键 词：变压器 区外故障 误动 可靠性 

分 类 号：TM77[电气工程—电力系统及自动化]