Abstract：The stator winding inter-turn short-circuit fault in nuclear power turbo-generator is one of the typical faults. It may cause rotor damage, slot wedges damage, windings fracture and some other serious problems. Therefore, it is important to know the distribution of electromagnetic force and the location in which the electromagnetic force concentration appears when the short circuit fault happens. First, a 2-D field-multi-loop circuit-motion coupled time-stepping finite element mathematical model for calculating the local electromagnetic force of giant nuclear power turbo-generator post-fault is presented, which combine the Maxwell stress and Lorentz formula. And then, a 1407MV·A nuclear turbo-generators is taken as an example, the radial and tangential force on rotor surface, the electromagnetic force on slot wall of stator and rotor, and the radial and tangential force on winding of stator and rotor under the giant nuclear power turbo-generator post-fault condition are calculated and analyzed. At the same time, the electromagnetic force distribution characteristics and relatively concentrated area in stator and rotor are achieved. Finally, the accuracy and rationality of calculation results are discussed. The research results of electromagnetic force in this paper can be applied to structure deformation analysis and fatigue analysis of the fault motor as a load. The proposed analysis idea for electromagnetic force can also provide a good reference for soling stator winding internal short-circuit fault, as well as other type motor.
赵洪森, 戈宝军, 陶大军, 吕品, 辛鹏. 大型核电汽轮发电机定子内部短路故障部电磁力分布研究[J]. 电工技术学报, 2018, 33(7): 1497-1507.
Zhao Hongsen, Ge Baojun, Tao Dajun, Lü Pin, Xin Peng. Local Electromagnetic Force Distribution Studyon Giant Nuclear Turbo-Generators with Stator Short-Circuit Fault. Transactions of China Electrotechnical Society, 2018, 33(7): 1497-1507.
[1] IEEEStd493—2007IEEE recommended practice for the design of reliable industrial and commercial power systems[S]. 2007. [2] 万书亭, 李和明, 许兆凤, 等. 定子绕组匝间短路对发电机定转子径向振动特性的影响[J]. 中国电机工程学报, 2004, 24(4): 157-161. Wan Shuting, Li Heming, Xu Zhaofeng, et al.Analysis of generator vibration characteristic on stator winding inter-turn short circuit fault[J]. Proceedings of the CSEE, 2004, 24(4): 157-161. [3] 蒙亮, 罗应力, 刘晓芳, 等. 汽轮发电机转子铁心表面电磁力分布的实例研究[J]. 中国电机工程学报, 2005, 25(1): 81-86. Meng Liang, Luo Yingli, Liu Xiaofang, et al.A case study of electromagnetic force distribution on rotor core surface of turbo-generator[J]. Proceedings of the CSEE, 2005, 25(1): 81-86. [4] Mizia J, Adamiak K, Eastham A R, et al.Finite element force calculation comparison of methods for electric machines[J]. IEEE Transactions on Magnetics, 1988, 24(1): 440-450. [5] Ren Z.Comparison of different force calculation methods in 3d finite element modelling[J]. IEEE Transactions on Magnetics, 1994, 30(5): 3471-3474. [6] 李志强, 罗应力, 蒙亮. 基于有限元的虚位移原理在汽轮发电机局部电磁力计算中的应用[J]. 中国电机工程学报, 2007, 27(15): 47-52. Li Zhiqiang, Luo Yingli, Meng Liang.The calculation of local magnetic force in turbo-generator with FEM based virtual work principle[J]. Proceedings of the CSEE, 2007, 27(15): 47-52. [7] 李志强, 罗应力. 基于有限元和虚位移原理的电机内电磁力密度计算新方法[J]. 中国电机工程学报, 2009, 29(3): 71-77. Li Zhiqiang, Luo Yingli.New method of magnetic force density computation for turbo-generator based on finite element method and virtual work principle[J]. Proceedings of the CSEE, 2009, 29(3): 71-77. [8] 王秀和, 杨玉波, 付大全. 基于瞬态模型的不对称供电三相感应电动机分析[J]. 中国电机工程学报, 2003, 23(2): 126-131. Wang Xiuhe, Yang Yubo, Fu Daquan.Analysis of three-phase induction motor fed by unbalanced voltage with transient model[J]. Proceedings of the CSEE, 2003, 23(2): 126-131. [9] 曹鑫, 邓智泉, 杨钢, 等. 无轴承开关磁阻电机麦克斯韦应力法数学模型[J]. 中国电机工程学报, 2009, 29(3): 78-83. Cao Xin, Deng Zhiquan, Yang Gang, et al.Mathematical model of bearingless switched reluctance motors based on Maxwell stress tensor method[J]. Proceedings of the CSEE, 2009, 29(3): 78-83. [10] Kovanen T, Tarhasaari T, Kettunen L.Localization of electromagnetic force based on material models[J]. IEEE Transactions on Magnetics, 2012, 48(1): 13-17. [11] Stancheva R D, Iatcheva I I.3-D electromagnetic force distribution in the end region of turbo-generator[J]. IEEE Transactions on Magnetics, 2009, 45(3): 1000-1003. [12] 谢颖, 王云阳. 笼型感应电机发生断条故障时转子局部电磁力计算[J]. 中国电机工程学报, 2012, 33(27): 127-134. Xie Ying, Wang Yunyang.Local electromagnetic force calculation on the rotor of squirrel-cage induction motors with broken bar faults[J]. Proceedings of the CSEE, 2012, 33(27): 127-134. [13] 谢颖, 王严. 笼型异步电机转子断条故障引发的电磁力波变化规律[J]. 电工技术学报, 2015, 30(10): 171-178. Xie Ying, Wang Yan.Variation Laws of electromagnetic force wave caused by the broken rotor bar fault in a squirrel-cage asynchronous motor[J]. Transactions of China Electrotechnical Society, 2015, 30(10): 171-178. [14] 谢颖, 冯春爽, 杨忠学, 等. 笼型感应电动机断条故障前后转子电磁力计算及结构静力学分析[J]. 电工技术学报, 2015, 30(15): 164-171. Xie Ying, Feng Chunshuang, Yang Zhongxue, et al.Electromagnetic force calculation and structural static analysis on the rotor of squirrel-cage induction motors before and after the broken bars faults[J]. Transactions of China Electromagnetic Society, 2015, 30(15): 164-171. [15] 梁艳萍, 刘金鹏, 陈晶. 大型感应电动机单相短路故障动态力计算[J]. 中国电机工程学报, 2012, 32(9): 109-115. Liang Yanping, Liu Jinpeng, Chen Jing.Dynamic electromagnetic force calculation for single-phase short circuit fault of large induction motors[J]. Proceedings of the CSEE, 2012, 32(9): 109-115. [16] 孙宇光, 王祥珩, 桂林, 等. 场路耦合法计算同步发电机定子绕组内部故障的暂态过程[J]. 中国电机工程学报, 2004, 24(1): 136-141. Sun Yuguang, Wang Xiangheng, Gui Lin, et al.Transient calculation of stator’s internal faults in synchronous generator using FRM coupled with multi-loop method[J]. Proceedings of the CSEE, 2004, 24(1): 136-141. [17] 汤蕴璆, 梁艳萍. 电机电磁场的分析与计算[M]. 北京: 机械工业出版社, 2010. [18] 高景德, 王祥珩, 李发海. 交流电机及其系统分析[M]. 北京: 清华大学出版社, 2010. [19] 阎秀恪, 谢德馨, 高彰燮, 等. 电磁力有限元分析中麦克斯韦应力法的积分路径选取的研究[J]. 电工技术学报, 2003, 18(5): 32-36. Yan Xiuke, Xie Dexin, Gao Zhangxie, et al.Research on integration path selection of Maxwell stress tensor method used in electromagnetic force FEM analysis[J]. Transactions of China Electrotechnical Society, 2003, 18(5): 32-36. [20] Shi Z W, Bajanathan C B.A method of reducing errors in the calculation of electromagnetic force by Maxwell stress summation method[J]. IEEE Transactions on Magnetics, 1999, 35(3): 1358-1361. [21] Wignall A N, Gillbert A J.Calculation of force on magnetic ferrous cores using the Maxwell stress method[J]. IEEE Transactions on Magnetics, 1988, 24(1): 459-462. [22] Komeza K, Tegopoulos J, Wrak S.Comparative computation of forces and torques of electromagnetic devices by means of different formulae[J]. IEEE Transactions on Magnetics, 1994, 35(5): 3475-3478. [23] 方红伟, 夏长亮, 修杰. 定子绕组匝间短路时发电机电磁转矩分析[J]. 中国电机工程学报, 2007, 27(15): 83-87. Fang Hongwei, Xia Changliang, XiuJie. Analysis of generator eletro-magnetic torque on armature winding inter-turn short circuit fault[J]. Proceedings of the CSEE, 2007, 27(15): 83-87. [24] 谢颖, 王严. 笼型异步电机转子断条故障引发的电磁力波变化规律[J]. 电工技术学报, 2015, 30(10): 172-178. Xie Ying, Wang Yan.Variation laws of electromagnetic force wave caused by the broken rotor bar fault in a squirrel-cage asynchronous motor[J]. Transactions of China Electrotechnical Society, 2015, 30(10): 172-178.
2018, Vol. 33 
