摘要
介绍某330MW发电机因为启动前机端电压互感器一次熔丝安装不到位导致的匝间保护误动事故的分析处理过程,探讨发变组保护装置中的电压互感器二次回路断线判据原理,提出降低双TV断线判据电压差定值的建议。
The analysis and treatment of inter-turn protection malfunction of a 330MW generator which was caused by the primary voltage transformer fuse being installed in wrong place are introduced. The principle of the circuit disconnection for the secondary voltage transformer in the generator and transformer unit protection devices is discussed. The advice of reducing double TV line disconnection criterion difference value is given.
出处
《自动化应用》
2012年第10期51-53,共3页
Automation Application
关键词
匝间保护
断线
电压互感器
误动作
inter-turn protection
disconnection
voltage transformer
malfunction
