核电半速汽轮发电机励磁绕组匝间短路时转子涡流损耗研究  

Rotor eddy current loss of nuclear power half speed turbogenerator with inter-turn short circuit of field winding

作　　者：辛鹏[1] 戈宝军[2] 陶大军[2] XIN Peng;GE Baojun;TAO Dajun(College of Information and Control Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China;National Engineering Research Center of Large Electric Machines and Heat Transfer Technique,Harbin University of Science and Technology,Harbin 150080,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]哈尔滨理工大学大型电机电气与传热技术国家地方联合工程研究中心,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2024年第4期72-80,共9页Electric Machines and Control

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：为研究核电半速汽轮发电机励磁绕组匝间短路时转子涡流损耗特性,推导了核电半速汽轮发电机空载运行时励磁绕组匝间短路故障下,定子分数次谐波环流产生的合成磁动势表达式,分析合成磁动势相对于转子的转速,揭示了转子表面产生涡流的原因以及涡流的频率特性。结合涡流损耗计算方法,以一台核电半速汽轮发电机为例进行了仿真验证。在此基础上,对核电半速汽轮发电机励磁绕组不同位置发生相同程度匝间短路,以及励磁绕组发生不同程度匝间短路过程进行了仿真,计算了转子各阻尼条及槽楔中的涡流及涡流损耗,揭示了励磁绕组匝间短路时影响转子阻尼条及槽楔中涡流和涡流损耗的因素。为核电半速汽轮发电机励磁绕组匝间短路故障时,分析转子发热的影响因素提供了理论基础。In order to find out the rotor eddy current loss characteristics behind inter-turn short circuit of field winding in nuclear power half speed turbogenerator,the expression of the synthetic magnetomotive force generated by the fractional harmonic current of the stator during the field winding inter-turn short circuit fault was derived under the no-load operation of a nuclear power half speed turbogenerator.The rotational speed of the synthetic magnetomotive force relative to the rotor and the frequency of the induction of eddy current in the rotor damping strip and the slot wedge were analyzed.And the simulation verification was carried out.On this basis,the same degree of inter-turn short circuit occurs in different position of field winding of the nuclear power half speed turbogenerator,and different degree short circuit of field winding were simulated.The eddy current and eddy current loss in the damping strips and slot wedges of the rotor were calculated.The factors affecting the eddy current and eddy current loss in the rotor damping strip and the slot wedge were revealed in the inter-turn short circuit of the field winding.It pro-vides a theoretical basis for the rotor eddy current loss of the field winding inter-turn short circuit fault.

关 键 词：核电半速汽轮发电机 励磁绕组 匝间短路 涡流损耗 

分 类 号：TM311[电气工程—电机]