水轮发电机励磁绕组匝间短路时定子铁心动态电磁力研究  

Research of Stator Core Dynamic Electromagnetic Forces for Inter-turn Short Circuit of Hydro-generator Excitation Winding

作　　者：辛鹏[1] 刘培瑞 袁成磊 李超然 XIN Peng;LIU Peirui;YUAN Chenglei;LI Chaoran(School of Information and Control Engineering,Jilin Institute of Chemical Technology,Jilin City 132022,China)

机构地区：[1]吉林化工学院信息与控制工程学院,吉林吉林132022

出　　处：《吉林化工学院学报》2024年第5期12-17,共6页Journal of Jilin Institute of Chemical Technology

基　　金：吉林省自然科学基金(YDZJ202301ZYTS271);吉林省教育厅科研项目(JJKH20240312KJ)。

摘　　要：为准确分析水轮发电机励磁绕组匝间短路时定子齿壁电磁力的分布特点和变化规律,利用ANSYS软件建立了某水轮发电机有限元模型,并结合麦克斯韦应力法,对发电机励磁绕组不同程度短路故障时定子齿壁动态电磁力进行计算,得到了定子齿壁动态电磁力分布情况。结果表明:水轮发电机励磁绕组匝间短路故障后,定子铁心受到不平衡电磁力,且不平衡电磁力呈现槽口大、槽底小的变化规律,随着短路匝数的增加,定子铁心动态电磁力大幅增大。To accurately analyze the distribution characteristics and variation rules of the stator slot wall electromagnetic force during inter-turn short circuit of hydro-generator excitation winding,a finite element model of a hydro-generator was established by ANSYS software,and the dynamic electromagnetic force of stator slot wall was calculated with Maxwell stress method.The dynamic electromagnetic force distribution on the stator slot wall was obtained.The results indicated that the stator core experiences unbalanced electromagnetic forces because of the inter-turn short circuit of the hydro-generator excitation winding,and these unbalanced electromagnetic force shows the change law of large groove and small groove bottom.Furthermore,the dynamic electromagnetic forces on the stator core significantly increase with an increase in the inter-turn short circuit of the hydro-generator excitation winding.

关 键 词：水轮发电机 励磁绕组 匝间短路 动态电磁力 麦克斯韦应力法 

分 类 号：TM312[电气工程—电机]