中压开关柜三维电场有限元分析

3D Finite Element Analysis of Cubicle Metal-Enclosed Switchgear

在研究电力设备小型化的过程中,针对压开关柜的绝缘设计优化问题,由于40.5k V铠装移开式中压开关柜的复杂结构,通过充分合理的简化,应用辅助单元MESH200、局部细化功能及网格划分控制工具,建立网格质量高、数量少的高效三维有限元仿真模型。通过对两种不同求解器的应用比较,指出基于不完全乔累斯分解-共轭梯度法算法的ICCG求解器在计算资源少时具有更高的仿真效率。通过分析开关柜母线室和电缆室的电位和电场强度分布并指出开关柜电场关注点,为开关柜的绝缘结构设计提供理论参考依据。

Insulation design of medium voltage is given more and more auention as trend of electric devices minia- turized. A three dimensional electric field analysis finite element model, with high quality and less elements, was es- tablished by simplifying origin model, applying Virtual element 200, and refining method and grid dividing control tool. By adopting two different types solver and eomparing the results, it was found that ICCG solver based on incom- plete Cholesky conjugate gradient has higher simulation efficiency under limited computing source. Electric potential and electric field distribution were obtained through calculation and analysis by ANSYS. These results propose some theoretical advices for the insulation configuration design of medium voltage metal - enclosed switchgear.