伞裙脆化位置对复合绝缘子电场强度分布的影响  

Influence on Electric Field Intensity Distribution of Composite Insulator by Embrittlement Position of Umbrella Skirt

作　　者：李如锋[1] 朱赋[1] 胡万波[1] 崔琦[1] 

机构地区：[1]国网河北省电力公司邯郸供电分公司,河北邯郸056000

出　　处：《广东电力》2015年第1期96-99,共4页Guangdong Electric Power

摘　　要：为研究伞裙脆化位置对复合绝缘子电场强度的影响,建立了复合绝缘子伞裙不同位置的脆化模型,利用有限元对其电场强度和电位进行仿真分析。分析结果表明:伞裙脆化后金具处最大电场强度值比正常值大;高压端脆化部位的电场强度发生严重畸变,随着脆化位置向低压端靠近,脆化伞裙沿面电场强度先减小后缓慢增大;高压端脆化部位电位分布明显比正常值高,使单片绝缘子承受电压偏大,加速绝缘子老化,但越靠近低压端这种影响越不明显。提出通过改进伞裙和护套的材料配方(如采用白炭黑)来提高复合绝缘子抗污、抗脆化能力的建议。For studying influence on electric filed intensity distribution of composite insulator by embrittlement position of umbrella skirt, an embrittlement model for different positions of umbrella skirts of composite insulator was established which was used for simulation analysis on electric field intensity and potential by making use of finite element. Analysis results indi- cated that maximum electric field intensity value after umbrella skirt embrittlement was bigger than normal value. In addi- tion, electric filed intensity of embrittlement part at high voltage end happened distortion and with embrittlement position approaching to low voltage end, electric filed intensity of surface of embrittlement umbrella skirt was firstly decreasing then slowly increasing. Potential distribution of embrittlement part at high voltage end was higher than normal value which might cause single insulator bear larger voltage and accelerate insulator aging. This kind of influence was not obvious when embrit- tlement position was more closer to the low voltage end. Suggestions about improving abilities of anti-pollution and resistance to brittle of composite insulator by improving material prescription（ such as using white carbon black） of umbrella skirt and sheath were proposed.

关 键 词：复合绝缘子 伞裙 脆化 电场强度 

分 类 号：TM215.92[一般工业技术—材料科学与工程]