空冷发电机端部结构件涡流损耗分析研究  

Analysis and Research on Eddy Current Loss of End Structure of Air-Cooled Generator

作　　者：傅晓锦[1] 朱宏艳 何嘉希 刘明慧 FU Xiao-jin;ZHU Hong-yan;HE Jia-xi;LIU Ming-hui(School of Mechanical Engineering,Shanghai Dianji University,Shanghai 201306,China;Shanghai Electric Power Station Equipment Co.,Ltd.,Generator Factory,Shanghai 200240,China)

机构地区：[1]上海电机学院机械学院,上海201306 [2]上海电气电站设备有限公司发电机厂,上海200240

出　　处：《机械设计与制造》2023年第5期90-93,98,共5页Machinery Design & Manufacture

基　　金：上海市自然科学基金(11ZR1413800)。

摘　　要：端部电磁场的计算是发电机端部涡流分布、温度分布、电磁计算的重要基础,通常采用的时步有限元分析计算一个工频周期的端部磁场需要耗费很长时间,因此提出一个新的计算方法,为端部电磁计算提供新思路。文中以250MW空冷发电机为研究对象,首先建立了发电机端部结构的三维有限元模型;然后,针对端部电磁仿真瞬态仿真耗时长的问题,提出了用稳态的时谐仿真代替瞬态仿真,并结合场内型式试验结果对各机型进行横向对比,验证了计算方法的可行性和准确性;最后,结合不同压圈材料下的涡流损耗计算结果进行分析,为工程设计提供一定参考。The calculation of the end electromagnetic field is an important basis of the eddy current distribution,temperature distribution and electromagnetic calculation at the end of the generator.The time-step finite element analysis used to calculate the end magnetic field of a power frequency cycle usually takes a long time.Therefore,a new calculation method was put forward to provide a new idea for the end electromagnetic calculation.Firstly,taking the 250MW air-cooled generator as the research object,established the three-dimensional finite element model of the generator end structure.Secondly,in view of the long timeconsuming problem of the end electromagnetic simulation transient simulation,replaced the transient-state simulation with steady-state time-harmonic simulation.Based on the results of the in-field type test,a horizontal comparison of various models was carried out to verify the feasibility and accuracy of the calculation method.Finally,the calculation results of eddy current loss under different pressure ring materials were analyzed to provide a certain reference for engineering design.

关 键 词：空冷发电机 端部绕组 涡流损耗 时谐仿真 

分 类 号：TH16[机械工程—机械制造及自动化] TM303[电气工程—电机]