Numerical calculation and analysis of temperature field for stator transposition bar in hydro-generator
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Numerical calculation and analysis of temperature field for stator transposition bar in hydro-generator

机译：水力发生器定子转子棒温度场的数值计算与分析

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AbstractAiming at the problem that the temperature field in the stator bar with transposition strands is difficult for analysis, a numerical method of evaluating the temperature field of the stator transposition bar is presented. The corresponding heat transfer coefficients of the convective heat transfer surfaces are obtained on the basis of the fluid velocity in radial ventilation groove, and the temperature value of the discrete points in stator transposition bar is obtained by the finite volume method. Additionally, the current phase of upper and lower bar in a single slot is taken into account. In order to validate the presented method, a 250?MW air cooled hydro-generator is taken as an example, and the solving model is established. The copper loss of stator bar is calculated by the presented method. The temperature distribution of stator transposition bar is analyzed and compared in different cases, and the validity of the presented method is verified by evaluating the temperature deviation between the numerical results and the test values.]]>
机译：<！[CDATA [ 抽象 旨在解决与转置线的定子杆中的温度场进行分析的问题，一种数值方法评估定子转座杆的温度场。基于径向通风槽中的流体速度获得对流传热表面的相应传热系数，并且通过有限体积法获得定子转子杆中的离散点的温度值。另外，考虑单个槽中的上杆和下杆的电流相位。为了验证所提出的方法，以250？MW空气冷却水电发生器为例，并建立求解模型。定子杆的铜损失通过所提出的方法计算。分析了定子转换杆的温度分布，并在不同的情况下进行比较，通过评估数值结果和试验值之间的温度偏差来验证所提出的方法的有效性。 ]]>

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