大容量汽轮发电机定子线圈绝缘结构改进的研究

Study on improving insulation structure of the stator coil for large turbogenerator

采用数值计算法得出了大容量汽轮发电机定子线圈槽部的电场分布和电场集中系数,并进行了试验研究。采用线性回归分析方法求出了定子线圈槽部电场集中系数与绝缘厚度和导线圆角半径的函数关系。为大型汽轮发电机绝缘结构合理设计、提高绝缘运行寿命奠定了基础。

The electric field distribution in the stator slot of large turbogenerator and the electric fieldconcentration factor are calculated with numerical calculating method.The experimental study is carried out.The function relationship between the biggest value of electric field in the stator slot and conductor corner radius as well as insulation thickness is presented by using linear regression analysis.Reliable theoretical basis is provided for promoting the insulation operating life and optimizing the insulation structure design of large turbogenerator with high voltage.