水轮发电机励磁绕组匝间短路时的磁场谐波特征研究  

Study of Magnetic Field Harmonic Characteristics of ExcitationWinding Inter-turn Short Circuit of Hydro-generator

作　　者：辛鹏[1] 沈航 吴永峰 XIN Peng;SHEN Hang;WU Yongfeng(School of Information and Control Engineering,Jilin Institute of Chemical Technology,Jilin City 132022,China;Jilin Petrochemical Company,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 [2]吉林石化公司,吉林吉林132022

出　　处：《吉林化工学院学报》2023年第3期17-21,共5页Journal of Jilin Institute of Chemical Technology

基　　金：吉林省自然科学基金(YDZJ202301ZYTS271)。

摘　　要：为研究水轮发电机励磁绕组匝间短路故障特征及影响因素,分析了励磁绕组匝间短路的故障机理,推导了水轮发电机正常和故障状态下的励磁磁动势以及气隙磁密表达式。在此基础上,以一台水轮发电机为例,采用场-路耦合法,建立了水轮发电机的二维有限元仿真模型,并通过励磁绕组匝间短路故障仿真,得到水轮发电机励磁绕组匝间短路时转子磁场的谐波特征。To study the characteristics and influencing factors of inter-turn short circuit fault of excitation winding of hydro-generator,the fault mechanism of inter-turn short circuit of excitation winding was analyzed,and the expressions of excitation magnetomotive force and air gap magnetic density under normal and fault conditions of hydro-generator were deduced.On this basis,a two-dimensional finite element simulation model of the hydro generator was established by using the field-circuit coupling method,and the harmonic characteristics of the rotor magnetic field during the excitation winding inter-turn short circuit fault of the hydro-generator were obtained through the excitation winding inter-turn short circuit fault simulation.

关 键 词：水轮发电机 励磁绕组 匝间短路 谐波 

分 类 号：TM341[电气工程—电机]