摘要
对同一台机组3次定子接地事故进行对比分析,3次故障分别发生在发电机机端、发电机内部和发电机中性点。对故障情况进行简单介绍,对故障原因进行分析,提出一种能够在工程中快速判定发电机"内部故障"和"外部故障"的方法。此方法能够快速判定故障区间,为发电机故障后是否进行零启升压试验提供依据。
This paper makes a comparative analysis of the three stator grounding faults of the same unit.The three times faults occur at the generator terminal, the generator interior and the generator neutral point respectively.The fault situation is briefly introduced, and the cause of the failure is analyzed.A method which can quickly distinguish"internal fault"and"external fault"of generators in engineering is proposed.It provides the basis for zero boost test after generator fault.
作者
黄晓鹏
丁永允
赵帅达
陈思同
HUANG Xiaopeng;DING Yongyun;ZHAO Shuaida;CHEN Sitong(Liaoning Dongke Power Co.,Ltd.,Shenyang,Liaoning 110179,China;Shenyang Institute of Engineering,Shenyang,Liaoning 110136,China;Electric Power Research Institute of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang,Liaoning 110006,China)
出处
《东北电力技术》
2019年第8期48-51,55,共5页
Northeast Electric Power Technology
关键词
定子接地
20Hz注入式
基波零序电压
3次谐波
stator grounding
20 Hz injection
fundamental zero sequence voltage
third harmonic
