配变监控终端中TA二次侧短路的在线检测方法  

On-line Detection Short-Circuit of TA Secondary Circuits in Distribution Transformer Terminal Unit

作　　者：韦文祥[1] 黄媛[1] 朱志杰[2] 

机构地区：[1]湖南科技大学信息与电气工程学院,湘潭411201 [2]湖南大学电气与信息工程学院,长沙410082

出　　处：《电力系统及其自动化学报》2009年第1期37-40,88,共5页Proceedings of the CSU-EPSA

基　　金：湖南省教育厅资助科研项目(07C263);湖南科技大学校级教育科学研究资助项目(G30720)

摘　　要：提出了一种利用零序、正序和负序电流综合判断TA二次短路的测量方法。该方法利用了TA在不同接法中二次侧出现短路时各序电流值的不同组合的特性,对TA二次侧短路进行判断。该判据能够同时适用于三相三线制中的V型接线和三相四线制中Y型接线的TA二次侧电流短路的检测。现场运行实践证实了该判据的可靠性和实用性。Based on the theory of three sequence current comparison, a measurement method of short circuit in the secondary side of TA is presented. When TA connection is different, short circuits in zero sequence, positive sequence and negative sequence are different. Consequently, the short-circuit can be concluded. The criterion is used in both V type connection mode of TA in three-phase three-wire system and Y-type connection mode of TA in three-phase four-wire system,and it is proved to be correct, reliable and practical.

关 键 词：配变监控终端 电流互感器 短路 判据 在线检测 

分 类 号：TM712[电气工程—电力系统及自动化]