异物短路引起主变差动保护动作事故分析  

Analysis on Differential Protection Action Faults of Main Transformer due to Foreign Matter-caused Short Circuit

作　　者：殷德聪 YIN Decong(Miyun Power Supply Company,Beijing 101500)

机构地区：[1]国网北京市电力公司密云供电公司,北京101500

出　　处：《电力安全技术》2021年第12期23-24,共2页Electric Safety Technology

摘　　要：阐述了两起异物短路引起主变压器差动保护跳闸事故过程,调查现场故障情况,剖析故障原因,提出运维防范措施和技术改造方法,为变电运维提供典型经验,以提高变电站运维管理水平。Two main transformer differential protection tripping accidents due to foreign matter-caused short circuit are described,investigations and analyses are carried out based on the field fault conditions,and the preventive operation and maintenance measures as well as technical upgrades are put forward so as to provide typical experience for substation operation and maintenance for improving the management level of substation operation and maintenance.

关 键 词：主变压器 差动保护 异物短路 变电站 

分 类 号：TM772[电气工程—电力系统及自动化]