考虑绕组电势的隐极发电机定子单相接地故障定位方法  

A Fault Location Method for Stator Single-phase Ground Fault in Non-salient Pole Generator Considering the Stator Winding Potential

作　　者：刘颖 王媛媛[1] 唐夏菲 车三宏 赵震 LIU Ying;WANG Yuanyuan;TANG Xiafei;CHE Sanhong;ZHAO Zhen(School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China;CRRC Jiangsu Electric Company,Ltd.,Yancheng Jiangsu 224100,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114 [2]江苏中车电机有限公司,江苏盐城224100

出　　处：《微电机》2022年第12期14-21,共8页Micromotors

基　　金：国家自然科学基金面上项目(52177069);长沙理工大学研究生科研创新项目(CX2020SS52)。

摘　　要：目前,三相隐极式同步发电机是世界多数国家火力发电的主要机组,为提高隐极式同步发电机定子单相接地故障定位的准确度和可靠性,本文在考虑了大型隐极发电机绕组电势相位特征的基础上,提出了两种故障定位方法,定位方法一基于考虑绕组电势相位特征后的故障绕组位置表达式,对绕组的故障位置进行判定;定位方法二利用绕组各个匝数故障时零序电压轨迹圆不一致的特点,在故障发生后判别出故障匝数。经仿真验证表明,这两种方法能准确识别故障位置,具有很好的可靠性。At present, the three-phase non-salient pole synchronous generator is the main unit of thermal power generation for most countries. In order to improve the accuracy and reliability of the positioning of the generator stator single-phase ground fault, the potential characteristics of the generator windings were considered in this paper, and two fault positioning methods were proposed, the first positioning method used the fault winding position expression after considering the winding potential phase characteristics to determine the fault position of the winding, the second positioning method used the characteristics of the inconsistency of the zero sequence voltage trajectory circle when each turn of the winding fault is faulty, so as to determine the number of fault turns. The simulation results show that the two methods can identify the fault location accurately and have good reliability.

关 键 词：隐极式同步发电机 故障定位 定子单相接地 零序电压 绕组电势 

分 类 号：TM351[电气工程—电机]