摘要
以40 MW全空冷汽轮发电机为例,应用ANSYS仿真计算软件对该机组不同阻尼系统下的电机负序能力进行了仿真分析。采用涡流场有限元法和表面阻抗法来研究转子等各转动部件的涡流损耗及温升分布情况,得出结论:在转子表面装设阻尼绕组可降低涡流损耗引起的转子表面局部发热,且大齿表面阻尼条数量越多对降低转子局部发热越有效。仿真结果对提高汽轮发电机负序能力起到了重要作用。
Exampled by a 40 MW fully air-cooling turbine generator,the negative phase sequence capability of the motor under different damping systems of the unit is simulated and analyzed with ANSYS simulation software.The eddy-current loss and the temperature rise distribution of rotating components such as rotor are studied through the vortex-field finite-element method and surface impedance method,and the conclusion is made that the damping winding installed on the rotor surface can reduce local heating of rotor surface caused by the eddy-current loss,and more damping bars can reduce the local heating of rotor better.The simulation result is critical to the improvement of negative phase sequence capability of turbine generator.
作者
张艳竹
ZHANG Yanzhu(Harbin Institute of Large Electric Machinery,Harbin 150040,China)
出处
《上海大中型电机》
2021年第2期23-27,共5页
Shanghai Medium and Large Electrical Machines
关键词
汽轮发电机
负序
阻尼系统
月牙槽
损耗
turbine generator
negative phase sequence
damping system
crescent socket
loss
