在运硅橡胶复合绝缘子耐电弧性能变化研究  

Study on Arc Resistance of Silicon Rubber Insulators on Service

作　　者：晏年平 房子祎 邓静伟 万华 于钦学[3] YAN Nianping1,2, FANG Ziyi3, DENG Jingwei1, WAN Hua1, YU Qinxue3(1. State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China; 2. Tsinghua University, Beijing 100084, China; Xi＇an Jiaotong University, Xi＇an 710049, Chin)

机构地区：[1]国网江西省电力有限公司电力科学研究院,江西南昌330096 [2]清华大学,北京100084 [3]西安交通大学,陕西西安710049

出　　处：《绝缘材料》2018年第3期46-52,共7页Insulating Materials

基　　金：国家电网公司科技项目(52182015000U)

摘　　要：为研究复合绝缘子耐电弧性能变化情况及原因,随机选取3串复合绝缘子(分别来自线路TF-C、XY-B、SMF I-A)进行耐电弧试验,采用热失重分析、X射线光电子能谱以及X射线衍射等分析技术,对比分析了绝缘子表层及里层硅橡胶的热稳定性、热失重比例、元素相对含量以及结晶度。结果表明:TF-C绝缘子耐电弧性下降的主要原因是在外界因素长期作用下,其表层硅橡胶中填料与基体之间的界面被破坏,氢氧化铝填料析出。而相比之下,XY-B和SMF I-A绝缘子表层硅橡胶中氢氧化铝含量虽然有一定程度的降低,但尚不足以影响其耐电弧性。结晶度可以作为分析评价高温硫化硅橡胶运行状况的重要参数,但是TF-C绝缘子表层硅橡胶结晶度不降反升的异常现象值得关注。In order to study the variation of arc resistance performance of composite insulators, arc resis- tance tests were conducted on three different composite insulators which were randomly selected from lines of TF-C, XY-B, and SMF I-A, respectively. The thermal stability, mass loss ratio, elements relative content, and the degree of crystallinity of the surface layer and inner layer of the insulators were studied via thermogravimetric analysis （TGA）, X ray photoelectron spectroscopy （XPS）, and X ray diffraction anal- ysis （XRD）. The results show that the main reasons for the decrease of the arc resistance of TF-C insula- tor are the destruction of interface between the fillers in surface silicone rubber and the matrix and the precipitation of aluminum hydroxide under the long-term effect of external factors. By contrast, the con- tents of the aluminum hydroxide in the surface layer of XY-B and SMF I-A insulators also decrease but not affect the arc resistance. In addition, the crystallinity can be used as an important parameter for eval- uating the operating condition of high temperature vulcanized silicon rubber, it deserves more attention that the crystallinity of surface silicon rubber of TF-C insulator does not decrease but increase.

关 键 词：复合绝缘子 耐电弧性 热失重分析 X射线光电子能谱 X射线衍射 氢氧化铝 结晶度 

分 类 号：TM215.2[一般工业技术—材料科学与工程]