汽轮发电机换位线棒环流损耗对定子温度场的影响  

Influence of circulating current losses of transposition bars on stator temperature field in turbo-generators

作　　者：梁艳萍[1] 王颖[1] 王晨光[1] 李藏雪 周乐天 

机构地区：[1]哈尔滨理工大学电气工程学院,黑龙江哈尔滨150080 [2]哈尔滨电气动力装备有限公司,黑龙江哈尔滨150040

出　　处：《电机与控制学报》2016年第11期25-31,共7页Electric Machines and Control

基　　金：国家自然科学基金(51477038);黑龙江省自然科学基金(E2015061)

摘　　要：为了研究定子换位线棒环流损耗分布对汽轮发电机定子温度场的影响,依据流体力学以及传热学理论,以一台水-氢-氢冷汽轮发电机为例,建立定子三维流体—传热耦合场物理模型和数学模型,采用等效电路网络法计算当定子线棒采用0°/540°/0°换位方式时定子线棒每根股线的环流损耗,在此基础上采用有限体积法求解三维流体—传热耦合方程,得到定子换位股线的环流损耗按平均分布以及按实际分布两种情况下的定子温度。结果表明:定子温度的分布规律与定子换位线棒环流损耗的分布规律有关,当考虑定子换位股线的实际环流损耗分布时,定子铁心和定子线棒最高温度的位置和大小都发生变化。In order to study the influence of circulating current losses distribution of transposition bars on the stator temperature field, according to the theory of fluid dynamics and heat transfer, a water-hydro- gen-hydrogen cooled turbo-generator was taken as an example, and the three-dimensional fluid-tempera- ture coupled field physical and mathematical model of stator were established. The equivalent circuit net- work method was used to calculate the circulating current losses of every strand in 0°/540°/0° transposi- tion bars. Based on above work, the finite volume method was used to solve the three-dimensional fluid- temperature coupled equation. The stator temperature of the two schemes, the circulating current losses of each strand were considered average distribution and actual distribution, were obtained. The results show that the distribution of stator temperature is related to the distribution of circulating current losses in stator transposition bars. When the actual distribution of circulating current losses is considered by stator trans- position strands, the location and the value of the highest temperature in stator will change.

关 键 词：汽轮发电机 换位线棒 环流损耗 有限体积法 温度场 

分 类 号：TM311[电气工程—电机]