一起零序保护后加速误动分析及防范措施  

Analysis and countermeasure of misoperation of zero-sequence post-acceleration protection

作　　者：上官帖 谌争鸣 熊华强[1] 

机构地区：[1]江西省电力科学研究院,江西南昌330006

出　　处：《继电器》2008年第8期87-90,94,共5页Relay

摘　　要：单相重合闸过程中,线路存在非全相运行,单相重合闸要与零序电流保护密切配合。从微机保护的设计原理出发,深入分析了开关位置继电器在重合闸过程中,判别线路非全相的重要作用。微机保护把跳闸位置继电器TWJ常闭触点作为合闸位置判别,有些装置会在开关未合闸时就误发已合闸变位的错误信息至零序电流保护,造成零序保护后加速提前开放,待零序后加速定值、延时到达后误动跳三相。提出了有效防范零序保护后加速误动的措施。It exists non-all-phase running of power line during reclosure. The process of single-phase reclosing should be cooperates perfect with zero-sequence current protection. Since microcomputer protection regards normally closed contact of positon relay as the criterion of switching on position, the reason of misoperation of zero-sequence post-acceleration protection is found out. This paper also analyzes how important role the position relay of break plays in differentiating non-all-phase running of power line during reclosure based on the design of microcomputer protection.

关 键 词：继电保护 重合闸 误动 分析 防范措施 

分 类 号：TM773[电气工程—电力系统及自动化]