主变压器差动保护误动故障实例分析  

Malfunction Analysis of Differential Protection for Main Transformers

作　　者：谭雨珍[1] 程本良 孙世磊[1] 李晓[1] 

机构地区：[1]华能烟台发电有限公司,山东烟台264000 [2]国网山东省电力公司烟台市福山区供电公司,山东烟台264000

出　　处：《山东电力技术》2016年第12期42-45,共4页Shandong Electric Power

摘　　要：某110 kV变电站上线路6发生故障,导致该母线上所连接的4号主变压器差动保护误动。结合故障实例,对电流互感器(TA)饱和引发的主变差动保护误动进行详细分析,并制定出相应的整改方案及预防措施,以避免类似事故再次发生。A line fault in an 110 kV substation caused the protection real-operation of No.4 main transformer which connected with the same bus. The transformer differential protection mal-operation caused by current transformer saturation was analyzed in detail combined with fault report. Improvement programs and precautionary measures were proposed to prevent similar incidents from happening again.

关 键 词：变压器差动保护 TA饱和 保护误动 

分 类 号：TM774[电气工程—电力系统及自动化]