摘要
运行人员用直流拉路法查找变电所内直流接地故障时,误将中央信号屏上电压切换电源断开,导致全所电压小母线失压。文章针对双母线电压互感器二次电压切换存在的问题,分析了电压互感器断线的几种情况和微机保护判别断线的判据,并提出防止二次回路失压误动的措施。
For the existing problem of the secondary voltage switch of duplicate bus voltage transformers, this paper firstly analyzes several situations of fuse blowing of voltage transformers and breakage criterion using microprocessor-based protection, and then concludes some measures to prevent mistake action causing secondary circuit losing voltage.
出处
《常州工学院学报》
2009年第4期30-33,共4页
Journal of Changzhou Institute of Technology
关键词
电压切换
电压断线
二次回路
voltage switch
fuse blowing of voltage
secondary circuit
