某发电厂变压器单侧差动保护误动原因分析  

Cause Analysis of Transformer Unilateral Differential Protection Maloperation in a Power Plant

作　　者：张金德 刘盼 ZHANG Jinde;LIU Pan(Yunnan Zhaoxun Technology Co.,Ltd.,Kunming 650500,China;Yunnan Electric Power Technology Co.,Ltd.,Kunming 650051,China)

机构地区：[1]云南兆讯科技有限责任公司,云南昆明650500 [2]云南电力技术有限责任公司,云南昆明650051

出　　处：《电工技术》2021年第15期154-155,共2页Electric Engineering

摘　　要：某发电厂发生了一起变压器单侧差动保护误动的事件,对该电厂的安全运行和发电效益造成巨大影响。为避免类似不安全事件的再次发生,对该起变压器单侧差动保护误动事件的原因进行了现场调查、分析和测试,并重点对主变差动保护系统中电流采集异常的原因及对差动保护的影响进行了深入分析。A transformer unilateral differential protection misoperation occurred in a power plant,which has a great impact on the safe operation and power generation efficiency of the power plant.In order to avoid the recurrence of similar unsafe events,the causes of the maloperation of transformer unilateral differential protection are investigated,analyzed and tested.The causes of abnormal current acquisition in the main transformer differential protection system and its impact on the differential protection are analyzed.

关 键 词：单侧 差动保护 变压器 误动 

分 类 号：TM774[电气工程—电力系统及自动化]