摘要
介绍一起因Unitrol 5000励磁系统励磁变超温造成的发电机组跳闸事故,根据保护动作情况和录波数据,通过全面检查,得出事故发生的根本原因系励磁变测温元件采样失真,间接原因为励磁变温度保护配置欠合理。
An accident of generator trip caused by over temperature of excitation transformer which run through the UNITROL 5000 excitation system had been introduced in this paper.According to the protection action and the recorded data,through the comprehensive inspection,it is concluded that the fundamental cause of the accident is the sampling distortion of the temperature measurement element in the excitation transformer,and the indirect reason is that the temperature protection configuration of the excitation transformer is not reasonable.
关键词
励磁变
超温
温度保护
excitation transformer
over temperature
temperature protection
