摘要
介绍一起因区外单相故障引发的500 kV自耦变压器纵差保护误动事故,从此类型国外纵差保护原理入手,分析了误动原因,并对同类型的主变纵差保护在电网中的应用提出建议。
A 500 kV autotransformer longitudinal differential protection malfunction caused by an external single phase fault is introduced in this paper. The Differential protection principles of the imported equipment are studied, and the reasons for the malfunction are analyzed. Improvement recommendations is presented for similar protection devices in the power grid.
出处
《江苏电机工程》
2015年第5期12-14,共3页
Jiangsu Electrical Engineering
关键词
自耦变压器
纵差保护
误动
极性
电流互感器
autotransformer
longitudinal differential protection
malfunction
polarity
current transformer
