摘要
针对复合绝缘子材料的老化问题,笔者以有现场运行历史的复合绝缘子为分析对象,首先通过电场计算结果,比较了不同伞裙位置所承受电场的差异。进而通过对高、低场强区材质的断面作扫描电镜,对比了材质在电老化、紫外老化因素下表现出的微观结构特征;通过对比伞裙侧表面和上下表面的微观结构,揭示了电老化和电烧蚀的发生规律;通过能谱分析,探索了表面积污向材质内部迁移的可能性。以上结果,对于进一步研究复合绝缘子的老化、进行复合绝缘子的抗老化优化设计具有借鉴意义。
Aiming at the problem of aging of composite insulator, a composite insulator with seven years running history at power grid is analyzed. Its electric field is computed through finite elements method, and the electric field intensities at different umbrellas are compared. The microstruetures of silastic aged under electric and ultraviolet effects are also compared by analyzing the SEM photos of different silastic sections of the umbrellas. The comparison between the microstructures of top and bottom surfaces of umbrella demonstrates the rules of electric aging and electric erosion. The possibility of surface contamination moving inside silastic is studied via energy spectrum analysis. The results will be helpful for research of composite insulator aging and optimization design of anti-aging.
出处
《高压电器》
CAS
CSCD
北大核心
2009年第1期21-24,共4页
High Voltage Apparatus
基金
中国博士后科学基金项目(沙尘暴环境下高压绝缘子外绝缘特性及放电规律研究(20070411125)
