电流互感器及其二次回路若干技术问题的探讨  

Discussion about Several Technical Issues of Current Transformer and Its Secondary Circuit

作　　者：宋述勇 郝伟[1] 李瑞[1] 

机构地区：[1]国网山西省电力公司电力科学研究院,山西太原030001

出　　处：《山西电力》2015年第6期4-6,共3页Shanxi Electric Power

摘　　要：阐述了电流互感器减极性标注的概念,以及不同保护装置对电流互感器二次回路断线闭锁采取的不同逻辑;对比分析了规程对电流互感器二次回路接地方式的差异;剖析了油纸型电容型电流互感器二次绕组的特殊排列问题;探讨了电流互感器饱和问题,以及电流互感器10%误差曲线的简易校核方法。The concept of subtractive polarity marking of the current transformer（CT）is elaborated, and different logic adopted for CT secondary circuit breaking blocking is also introduced. The differences between regulations and the CT＇s actual secondary circuit grounding modes are compared and analyzed. Besides, the special arrangement of secondary winding of oiled-paper capacitive CT is analyzed. The issue of CT＇s saturation and the simplified checking method of CT 10% error curve are also explored in this paper.

关 键 词：极性 接地 断线闭锁 饱和 10%误差曲线 

分 类 号：TM452[电气工程—电器]