大型可变速发电电动机定转子绕组端部电动力仿真分析  

Simulation and Analysis of Electrodynamic Forces at the End of Stator and Rotor Windings of Large Variable Speed Generating Motors

作　　者：王小建 胡金明 温占营 陈忠宾 肖先照 李桂芬[2] 孙玉田[2] WANG Xiaojian;HU Jinming;WEN Zhanying;CHEN Zhongbin;XIAO Xianzhao;LI Guifen;SUN Yutian(Jiangsu Guoxin Liyang Pumped Storage Power Generation Co.,Ltd.,Changzhou 213300,China;Harbin Electric Machinery Co.,Ltd.,Harbin 150040,China;Hebei Funing Pumped Storage Co.,Ltd.,Qinhuangdao 066300,China)

机构地区：[1]江苏国信溧阳抽水蓄能发电有限公司,江苏常州213300 [2]哈尔滨电机厂有限责任公司,哈尔滨150040 [3]河北抚宁抽水蓄能有限公司,河北秦皇岛066300

出　　处：《大电机技术》2024年第3期16-22,共7页Large Electric Machine and Hydraulic Turbine

基　　金：黑龙江省自然科学基金(TD2021E002)。

摘　　要：大型可变速发电电动机定转子绕组端部结构复杂,当电机出现突然短路等故障工况时,会在定转子端部绕组上产生强大的冲击电流,以致在绕组线棒上产生很大的电磁力。若线棒端部绑扎不牢,可能会引起线棒位移或变形,甚至出现绝缘损坏等故障。本文对一台414MW可变速发电电动机的定转子绕组端部电动力进行了仿真分析,首先建立可变速发电电动机三维端部磁场的有限元仿真模型;然后计算得到可变速发电电动机在额定发电工况下发生两相突然短路、三相突然短路时的定转子电流,并将其作为有限元仿真的求解输入源;最后仿真计算可变速发电电动机定转子绕组端部电动力,并获得定转子绕组端部电动力在短路故障工况下的分布规律。The end winding structure of the stator and rotor of the large variable speed generating motor is complex.When the motor has a sudden short-circuit and other fault conditions,it will produce a strong impulse current on the stator rotor end winding,so that a large electromagnetic force is generated on the winding bar.If the end of the wire rod is not tied securely,it may cause displacement or deformation of the wire rod,and even insulation damage and other faults.In this paper,a simulation analysis is carried out based on the electrodynamic force at the end of the stator and rotor winding of a 414MW variable speed power generating motor.Firstly,a finite element simulation model of the three-dimensional end magnetic field of the variable speed power generating motor is established.Then,the stator and rotor currents are calculated for the variable speed power generating motor when two-phase sudden short-circuit and three-phase sudden short-circuit occurs under rated working conditions,and they are used as the boundary conditions for the finite element simulation.Finally,the electrodynamic force at the end of the stator and rotor windings of the variable speed power generating motor is simulated and calculated,and the distribution law of the electrodynamic force under the short-circuit fault condition is obtained.

关 键 词：可变速 发电电动机 绕组 电动力仿真 短路工况 

分 类 号：TM312[电气工程—电机]