摘要
对于具有特殊股线结构的大型空冷汽轮发电机温度场计算具有一定的难度。文中推导了大型空冷汽轮发电机定子上、下层线棒的股线数和截面不等时绕组涡流损耗的表达式,求解出发电机额定运行时定子股线沿径向分布的菲尔德系数;建立了定子径向通风沟内二维流体场的物理模型和数学模型,采用有限体积法对其进行了数值计算;建立定子三维温度场的物理模型和数学模型。以1台大型空冷汽轮发电机为例,在先前推导的基础上,采用有限元法对定子三维温度场进行数值计算,给出了在发电机温度场求解域中的温度分布规律。将计算结果与实测结果进行比较,得出了一些有益的结论。
It is difficult to calculate temperature field of large scale air-cooled turbo-generator with special strands structure. In this paper eddy loss expressions of strands for large air cooled turbo-generator with inequality strands and sections of upper and bottom windings are deduced firstly; Physical model and mathematical model of 2D fluid field inside radial ventilation duct were established, and which was numerically computed by using of finite volume method （FVM）, FELD coefficients distribution of stator strands along radial direction is solved under the generator rated operation; Physical model and mathematical model of 3D stator temperature field were established. Then a large scale air-cooled turbo-generator was taken as an example, 3D stator temperature field is numerically calculated using finite element method（FEM） based on the previous deducing, temperature distribution principle in solved region of generator temperature field was given. Lastly the computed data were compared with measured value and some useful conclusions were achieved.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第22期140-145,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50576021)
教育部博士点科研基金(20050214003)。~~
关键词
空冷汽轮发电机
不等截面
定子温度场
有限体积法
有限元法
air cooled turbo-generator
inequality sections
stator temperature field
finite volume method
finite element method
作者简介
丁树业（1978-），男，助教，在读博士，主要从事大电机综合物理场的研究，dingshuye@163．com；
李伟力（1962-），男，博士后，教授，博导，主要从事大型电机综台物理场和特种电机理论研究工作；
马贤好（1966-），男，高级工程师，主要从事大电机各类损耗的数值计算；
靳慧勇（1979-），男，硕士研究生，主要从事大电机流体场的数值计算。
