特殊绕组结构的空冷汽轮发电机定子三维温度场计算与分析  

Calculation and Analysis of 3D Stator Temperature Field for Air Cooled Turbo-generator With Special Wingdings Structure

作　　者：丁树业[1] 李伟力[2] 马贤好[3] 靳慧勇[3] 

机构地区：[1]哈尔滨理工大学,黑龙江省哈尔滨市150040 [2]哈尔滨工业大学,黑龙江省哈尔滨市150001 [3]哈尔滨电机厂有限责任公司,黑龙江省哈尔滨市150040

出　　处：《中国电机工程学报》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)。~~

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.

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 

分 类 号：TM312[电气工程—电机]