超高压发电机失磁异步运行时转子温度场分析

Analysis of rotor temperature field of EHVG loss of field asynchronous operating

为了准确分析超高压发电机失磁异步运行时转子各部件的温度分布,针对超高压发电机模拟样机建立三维转子温度场模型,利用有限元法分析超高压发电机失磁异步运行时转子温度场的分布。在三维转子温度场模型上,分析超高压发电机额定运行时转子各部件的温度分布,通过计算值与试验值对比,证明该计算模型及计算方法有效,得出超高压发电机额定运行状态时转子各部件温升较低,满足运行条件。利用该计算模型对超高压发电机失磁异步运行时的转子各部件的温度进行分析,实验结果表明,超高压发电机失磁异步运行时,转子表面、励磁绕组背风面和阻尼条温升都较低。

In order to analyze rotor components temperature field of asynchronous operating of extra high voltage generator（EHVG）loss of field,it built three-dimensional model of the rotor temperature field of EHVG prototype,and used the finite element method to calculate the rotor temperature field of EHVG asynchronous operating.Based on the three-dimensional model of the rotor temperature field,the rotor temperature was analyzed when the EHVG was operating.Through temperature rise tested,it obtained that the method and the model are effective.And EHVG can be run by little temperature rise.On this model,the temperature field of rotor components were analyzed when EHVG was asynchronous operating.Experimental results show that temperature rise of the rotor surface,excitation winding leeside and the damp bar is lower.