Calculation and analysis on eddy current loss of damping bar under asymmetrical operation of 1000 MW hydro-generator
Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology(2012)
摘要
Aiming at the phenomenon that the damping bars would easily fuse under the asymmetrical operation of large hydro-generator, the eddy current loss of damping bars under the asymmetrical operation of a 1000 MW hydro-generator was further studied on the basis of establishing two-dimensional electromagnetic field-circuit-motion coupled time-stepping finite element model. The influence of such factors as the stator slotting, magnetic pole rotation and stator current on the eddy current loss of damping bars were comprehensively considered. The eddy current loss of each damping bar in one magnetic pole under different operating conditions was accurately calculated, and the change rule of eddy current loss was analyzed. And thus, the influence of the connection mode of damping system as well as the radius and material of damping bar on the eddy current loss of damping bars was discussed. The results indicate that the eddy current loss of last damping bar along the rotation direction is the largest, and the structure parameters of damping system have greater influence on the distribution of eddy current loss of damping bars.
更多查看译文
关键词
1000 MW hydro-generator,Asymmetrical operation,Damping bar,Damping bar material,Damping bar radius,Damping mode,Eddy current loss,Numerical calculation
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要