基于有限元的无间隙氧化锌避雷器电阻片电位分布计算与影响因素分析  

Finite Element Method Based Calculation of Varistor Potential Distribution for Gapless Zinc Oxide Arrester and Influence Factors Analysis

作　　者：刘国特[1] 江栩铄 叶茂泉[1] 陈世昌[1] 

机构地区：[1]广东电网公司东莞供电局,广东省东莞市523000

出　　处：《智能电网》2016年第1期75-79,共5页Smart Grid

摘　　要：为研究表面污秽、引线布置、电阻片材料对避雷器电阻片电位分布的影响。提出一种基于有限元法的复合绝缘护套无间隙氧化锌避雷器模型,并采用有限元仿真软件COMSOL进行建模仿真研究。研究结果表明:避雷器表面污秽电导率对电阻片电压分布无影响;随引线布置角度的增大,避雷器电阻片电压分布越不均匀;随电阻片材料相对介电常数的增大,其电压分布逐渐均匀。研究结果有助于延长避雷器的使用寿命,维护电网的安全稳定运行。In order to research how surface contamination,lead arrangement and varistor material influence arrester varistor potential distribution,a model of the gapless zinc oxide arresters with composite insulated jacket based on finite element method is presented and simulation studies are also conducted on the model using the finite element simulation sofeware COMSOL. The simulation results show that the surface contamination has no influence on the potential distribution of the arrester varistor. However,the potential distribution of the varistor is more uneven with the increased angle of lead arrangement,and the voltage distribution is gradually even with the increased relative permittivity of the varistor material. The research results are conducive to prolonging service life of the arrester and maintaining safe and stable operation of power grid.

关 键 词：电阻片 电压分布 电导率 相对介电常数 

分 类 号：TM862[电气工程—高电压与绝缘技术]