摘要
新型混合绝缘子由瓷绝缘件和高温硫化硅橡胶复合而成,具有良好的机械强度和极佳的防污闪性能。为得到新型混合绝缘子表面硅橡胶包覆层的厚度及其与铁帽之间间隙大小的最佳取值,并分析混合绝缘子在直流挂网运行时与纯瓷绝缘子的表面电场存在的差异,本文研究不同硅橡胶包覆层厚度及其与铁帽的间隙距离对新型混合绝缘子的影响,通过电场仿真得到最佳设计厚度与距离,并对比瓷绝缘子串和新型混合绝缘子串的电位与电场分布差异。结果表明:硅橡胶包覆层厚度应设计为3 mm,硅橡胶与铁帽的距离应设计为1 mm。相比瓷绝缘子,混合绝缘子最大承担电压增加了0.145%,混合绝缘子的中心轴线、承担电位最大处、均压环和金具的最大电场强度分别增大了3.764%、-6.336%、-2.018%、-7.755%,硅橡胶包覆层几乎不影响原先瓷绝缘件的电位与电场分布。
The new hybrid insulators,composed of porcelain insulation parts and high-temperature vulcanized silicone rubber,possess good mechanical strength and excellent anti-pollution flashover performance.To obtain the optimal values for the thickness of the silicone rubber coating layer on the surface of the new hybrid insulator and the gap distance between the coating and the iron cap,and to analyze the differences in the surface electric field between the hybrid insulator and the pure porcelain insulator during DC grid operation,this paper researched the influence of different thicknesses of silicone rubber coating layers and the gap distance between the coating and the iron caps on the new hybrid insulators.The optimal design thickness and distance were obtained through electric field simulation,and the differences in potential distribution and electric field distribution between porcelain insulator strings and new hybrid insulator strings were compared.The results show that the thickness of the silicone rubber coating layer should be designed as 3 mm,and the distance between the silicone rubber and the iron cap should be designed as 1 mm.Compared with porcelain insulators,the maximum withstand voltage of the hybrid insulator increased by 0.145%.The maximum electric field strength of the central axis,the maximum potential bearing point,the voltage equalizing ring,and the hardware of the hybrid insulator increases by 3.764%,-6.336%,-2.018%,and-7.755%,respectively.The silicone rubber coating layer has little effect on the potential distribution and electric field distribution of the original porcelain insulation part.
作者
谭永殿
郑扬亮
唐勇
马俭
许忠友
覃甘简
TAN Yongdian;ZHENG Yangliang;TANG Yong;MA Jian;XU Zhongyou;QIN Ganjian(Baise Bureau,UHV Transmission Company of China Southern Power Grid Co.,Ltd.,Baise 533099,China;Guangzhou Bureau,UHV Transmission Company of China Southern Power Grid Co.,Ltd.,Guangzhou 510663,China)
出处
《绝缘材料》
北大核心
2025年第9期46-54,共9页
Insulating Materials
基金
中国南方电网有限责任公司超高压输电公司百色局科技项目(CGYKJXM20220116)。
关键词
混合绝缘子
输电线路
电场仿真
高温硫化硅橡胶
hybrid insulator
transmission line
electric field simulation
high-temperature vulcanized silicone rubber
