有机复合绝缘子串电位分布特性计算

摘要

The finite element software ANSYS was used to carry out simulation calculation of surface field density and potential distribution of axial direction for organic composite insulator strings. Research was made on the impacts of different pollution layer conductivity on surface field density and potential distribution of axial direction for organic composite insulator strings. The analysis shows that when the organic composite insulator string was covered with an even pollution layer, there was much component along the normal field density at its umbrella skirt edge and the component fluctuated with the pollution layer conductivity;there was much component along the tangential field density at its jacket and the distribution of the tangential field density along leakage current di-rection tended to equality with the increase of the pollution layer conductivity, which provides theoretical basis for analysis of flash-over accidents.%　　利用ANSYS有限元软件对有机复合绝缘子串表面场强和轴向电位分布进行仿真计算，研究不同污层电导率对有机复合绝缘子串表面场强和轴向电位分布的影响。分析表明：有机复合绝缘子在覆有均匀污层状态下，其伞裙边沿处有较高的法向电场强度分量，且随着污层电导率的增大，伞裙边沿法向电场强度分量逐渐增大；其护套处有较高的切向电场强度，且随着污层电导率的增大，切向电场强度沿泄漏方向的分布趋于均匀，为闪络事故分析提供了理论依据。