摘要
通过对一起500kV国产复合绝缘子断裂事故的分析,从电场分析的角度出发,考虑铁塔与导线的影响,采用有限元数值仿真计算的方法,并应用具有强大的实体造型、解算、数据分析和后处理功能的软件ANSYS及工作站,建立断裂绝缘子三维有限元模型,计算芯棒和护套间不同粘接状态:芯棒与护套粘接良好、芯棒与护套粘接面含气泡和护套出现蚀孔三种典型情况下绝缘子轴向电场分布,分析芯棒与护套粘接性能对电场强度变化的影响。计算结果表明:与无缺陷相比,气泡缺陷较蚀孔缺陷对场强畸变影响更明显,场强最大可增加50%。
Based on the accident analysis of a fractured 500kV domestic composite insulator,considering the impact of tower and wire,using the finite element numerical simulation and the powerful tool——workstation as well as ANSYS with the ability of solid modeling,solving,data analysis and post-processing,this paper established three-dimensional finite element model of the fractured insulator to calculate its axial electric field between the mandrel and the sheath under three different typical bonding situations： the mandrel and sheath bonding is good,the mandrel and sheath bonding surface with bubbles and the axial electric field with hole.Then,it analyzed the adhesive properties affection of the mandrel and sheath to electric field strength changes.The results showed that： compared with faultless,it with bubble effects more obvious on the field intensity distortion than with hole,and the maximum field strength will increase of 50 percent.
出处
《机电工程技术》
2012年第8期170-174,共5页
Mechanical & Electrical Engineering Technology
关键词
复合绝缘子
芯棒断裂
粘接状态
电场计算
有限元分析
composite insulator
core fracture
bonding status electric field distribution
finite element analysis
