一起发电机定子接地故障分析和定位  

Analysis and Location of a Generator Stator Grounding Fault

作　　者：牟孝薇 周筱矞 郑伟[1] 黎永嘉 MOU Xiaowei;ZHOU Xiaoyu;ZHENG Wei;LI Yongjia(Xiluodu Hydropower Plant,China Yangtze Power Co.,Ltd.,Zhaotong 657300,China)

机构地区：[1]中国长江电力股份有限公司溪洛渡水力发电厂,云南昭通657300

出　　处：《水电与新能源》2024年第11期75-78,共4页Hydropower and New Energy

摘　　要：为了快速精准定位出大型发电机组定子接地故障位置,首先通过装置动作报文、故障波形等判断是否发生定子接地故障,然后利用定子接地保护动作时机端电压计算出机端零序电压和分支电动势,最终确定定子绕组的接地位置,实现对定子绕组接地故障的定位。本研究可为以后处理类似故障提供借鉴。To quickly and accurately locate the stator grounding faults in large-scale generator units,the first step is to determine whether a stator grounding fault occurs based on the device action messages and the fault waveforms.Then,the generator end voltage at the time of the stator grounding protection action is used to calculate the generator end zero-sequence voltage and the branch electromotive force,and locate the grounding position of the stator windings.It can be useful reference for the treatment of similar faults.

关 键 词：发电机定子接地 故障定位 机端零序电压 

分 类 号：TV734.2[水利工程—水利水电工程]