一例发电机过激磁保护动作跳闸事故分析Analysis on Tripping Accident of Over-excitation Protection for Generator
鄢志超
YAN Zhi-chao(Jiaxing Power Generation Co.
摘要(Abstract)：
针对某600 MW机组在启动过程中的过激磁保护误动跳闸事故,根据保护装置故障记录和波形,分析纵向零序过压元件、三次谐波定子接地保护、过激磁保护动作情况,查找出故障原因。通过对保护的动作行为分析,提出了几点改进建议。
To deal with the tripping accident of the over-excitation protection during the startup of a 600 MW unit,this paper analyzes the actions of the longitudinal zero-sequence overvoltage element,third harmonic stator grounding protection and over-excitation protection according to the fault record and waveform of the protection device to identify the fault causes.Some proposals on improvement are presented through the analysis on the protection actions.
关键词(KeyWords)：
发电机;零序过压;三次谐波;过激磁保护;分析
generator;zero-sequence overvoltage;third harmonic;over-excitation protection;analysis
基金项目(Foundation):
作者(Author):
鄢志超
YAN Zhi-chao(Jiaxing Power Generation Co.
DOI: 10.19585/j.zjdl.2012.03.015