摘要
通过对广东珠海金湾发电有限公司一起定子接地保护的事故分析,证明了保护动作的正确性与及时性。从故障现象和实际检查不符的疑点出发,利用向量图直观地分析出故障发生过程是先发生断路再发生短路,得出了保护动作过程与现场检查情况完全相符的结论,验证了定子接地保护定值整定的正确性。
A fault of Guangdong Zhuhai Jinwan Power Generation Corporation Limited,which caused the stator earth-fault protection acted,was analyzed,and the analysis proved that the protection acted correctly and timely.Starting from the questionable point that the fault phenomenon was not accordance with the actual inspection,by using the vector diagram,according to the intuitive analysis,the fault process was determined that the open-circuit fault was occurred first,and then the short-circuit fault occurred.By further analysis,the conclusion obtained that the protection action process was fully accordance with the field inspection result,and it is verified that the settings of stator earth-fault protection is correct.
出处
《华电技术》
CAS
2010年第6期70-71,75,共3页
HUADIAN TECHNOLOGY
关键词
定子接地保护
基波零序
三次谐波
stator earth-fault protection
zero-sequence fundamental harmonic
third harmonic
