变压器差动保护误动行为分析及改进  

Analysis of a Mal-operation of Transformer Differential Protection and Counter-modification Scheme

作　　者：苏小雷 林超 王薛冬 郑冰冰 张泽江 李韵怡 王冰清 SU Xiaolei;LIN Chao;WANG Xuedong;ZHENG Bingbing;ZHANG Zejiang;LI Yunyi;WANG Bingqing(CYG SUNRI Co.,Ltd.,Shenzhen 518057,China)

机构地区：[1]长园深瑞继保自动化有限公司,广东深圳518057

出　　处：《电工技术》2023年第21期176-178,共3页Electric Engineering

摘　　要：分析了一起110 kV变压器差动保护动作事故,保护动作原因为变压器接线方式设置与实际不匹配,导致变压器差动保护装置在区外故障时误动。基于该误动原因分析提出变压器平衡关系自动校验方案,供专业技术人员借鉴与参考。仿真实验验证了该方案的有效性。The present work analyzes a mal-operation accident of the differential protection occurred on a certain 110 kV transformer.The mal-operation was caused by the mismatch between transformer wiring mode and actual situation,resulting in undeserved activation of the protection device when the distribution line encountered an external fault.Based on the obtained reason for this mal-operation,an adaptive verification scheme for transformer balance relationship is proposed,hoping to provide useful reference for relevant personnel.The effectiveness of the proposed scheme is verified through simulative experiments.

关 键 词：变压器 区外故障 差动保护 误动 改进 

分 类 号：TM769[电气工程—电力系统及自动化]