排间绝缘故障引起电机定子热问题的分析及诊断  

Analysis and Diagnosis of Thermal Problems in Large Hydrogenerator Stator Caused by Row Insulation Fault

作　　者：梁广泰 丁树业[2] 李伟力[3] 

机构地区：[1]哈尔滨动力设备股份有限公司,黑龙江哈尔滨150040 [2]哈尔滨理工大学,黑龙江哈尔滨150040 [3]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《大电机技术》2006年第5期16-19,35,共5页Large Electric Machine and Hydraulic Turbine

摘　　要：本文首先建立了大型水轮发电机定子三维温度场的数学模型和物理模型,给出了边界条件和假设条件,同时也给出了求解域内的流场计算模型,采用有限体积法计算了通风沟内流体分布,得出了求解域内各表面散热系数。在此基础上,采用有限元法计算了排间绝缘故障时的定子温度场,并分析了导热系数的变化对温度场的影响,得出了一些有益的结果,为电机设计人员和运行人员提供一定的依据。In this paper, mathematical model and physical model of stator 3D temperature field of large hydrogenerator were established firstly. Then boundary conditions and assumptions were given. Also the fluid field calculation model was given. The fluid distribution inside ventilation ducts was computed using finite volume method （FVM）. Each surface heat transfer coefficient of solved region was gained. On the above basis, the stator temperature fields were calculated using finite element method （FEM） when row insulations were fault, the effect of heat transfer coefficient on temperature field were analysed, and some useful results were got, which offer some certain basis for machine designers and power plant operators.

关 键 词：大型水轮发电机 排间绝缘 定子三维温度场 故障诊断 有限体积法 

分 类 号：TM301.41[电气工程—电机]