一起二次电压切换回路故障分析  

Analysis of a Fault in Secondary Voltage-Switching Circuit

作　　者：康权[1] 张鸿飞[1] 吴小波[1] 施盛波[1] 杨跃平 

机构地区：[1]宁波电业局,浙江宁波315016 [2]宁海供电局,浙江宁海315600

出　　处：《浙江电力》2009年第6期67-69,共3页Zhejiang Electric Power

摘　　要：在微机保护中,保护装置要根据不同的运行方式来采集相应的交流电压,因此电压切换正确与否对保护的可靠动作具有十分重要的意义。就一起因切换回路中的双位置继电器不正确动作而导致的母线TV二次侧非正常并列事例进行了详细分析,并提出了提高切换可靠性的改进措施。In the microcomputer based relay protection, the alternating voltage is obtained according to the different operation mode by the device. So, the accurate action of the voltage-switching is of vital importance to the device＇s reliability. In this article, a fault of the abnormal parallel of bus TV caused by the incorrect action of double-coil realy in the voltage-switching circuit is analyzed particularly, and some measures were put forward to increase the circuit＇s accuracy.

关 键 词：电压切换 双位置继电器 并列 

分 类 号：TM774[电气工程—电力系统及自动化]