Research on improvements of using electronic current transformer on distance protection

被引：3
作者：
Chen, Qingqian [1 ]
Hou, Hui [1 ]
You, Dahai [1 ]
Yin, Xianggen [1 ]
Yao, Zhandong [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Coll Elect & Elect Engn, Wuhan 430074, Hubei, Peoples R China
来源：
2007 42ND INTERNATIONAL UNIVERSITIES POWER ENGINEERING CONFERENCE, VOLS 1-3 | 2007年
关键词：
current transformers; distance protection; Electronic Current Transformer; optical fiber transducers; saturation;
D O I：
10.1109/UPEC.2007.4468958
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Traditional magnetic current transformer (CT) always has the problem of saturation, which depresses the accuracy of distance protection's impedance measurement and shortens its protection zone. Based on this analysis, traditional measures to solve this problem are summarized first, and then the newly developed electronic current transformer (ECT) is introduced as a new way to solve the problem. Because of its high accuracy, high stability, wide frequency band, and most of all, without the problem of magnetic saturation, ECT has become a popular substitute for traditional CT. It can improve the starting unit, phase selecting unit, impedance unit and other functional units of distance protection. Experimental analysis shows that using ECT instead of traditional CT can enhance the operating accuracy and reliability of distance protection greatly.
引用
收藏
页码：267 / 272
页数：6
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