基于硬质疏水性涂层的配网遮蔽用具的沿面放电特性研究  

Study on Surface Discharge Characteristic for Distribution Network Cover Appliance Based on Toughing Hydrophobic Coating

作　　者：吴田 曹探深 劳国威 方春华[1] 黎鹏 普子恒[1] WU Tian;CAO Tanshen;LAO Guowei;FANG Chunhua;LI Peng;PU Ziheng(College of Electrical Engineering&New Energy,China Three Gorges University,Hubei Yichang 443002,China;Qingyuan Dianchuang Electric Power Engineering Installation Co.,Ltd.,Guangdong Qingyuan 511517,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]清远市电创电力工程安装有限公司,广东清远511517

出　　处：《高压电器》2021年第4期21-27,共7页High Voltage Apparatus

基　　金：国家自然科学基金(51807110)。

摘　　要：为解决短时降雨和高湿度条件下配网遮蔽用具绝缘性能急剧下降的问题,将硬质化疏水性的纳米SiO2涂料均匀喷涂在绝缘子遮蔽罩表面,对三种不同绝缘子遮蔽罩样品的憎水性能、沿面放电电压和泄漏电流的影响展开了试验分析,并结合图像识别技术对不同表面的水珠形态分布进行了分析。试验结果表明:涂有疏水涂料绝缘子遮蔽罩的憎水性从HC5提升到HC2;在干燥条件下,三种不同绝缘子遮蔽罩样品的干闪电压相差不大且差异在5%以内,在淋雨条件下两种疏水涂料P-EL88和CSS的湿闪电压比无涂层样品高75%以上,泄漏电流是无涂层样品的1/9左右;疏水涂层表面水珠的占空比和粒径大小均小于无涂层表面。其中硬质疏水涂层P-EL88的应用效果最好,可显著提高遮蔽用具表面的憎水性和改善淋雨条件下的绝缘性能。For solving the problem of sharp drop of insulation performance of distribution network cover appliance at the condition of short-time rainfall and high humidity,the toughing hydrophobic nano-SiO2 coating is uniformly sprayed on the surface of cover of insulator. The influence of hydrophobicity,surface discharge voltage and leakage current of three kinds of samples of insulator covers are tested and analyzed and the morphological distribution of water droplets on different surfaces is analyzed with combination of image recognition technology. It is shown by the test result that the hydrophobicity of insulator cover coated with hydrophobic coating increases from HC5 to HC2. Under dry condition,the difference of dry flashover voltage of samples of the three different insulator covers is little and is within 5%. While,under the rain condition,the wet flashover voltage of P-El88 coating and CSS coating is higher than the sample without the coating by 75% and the leakage current is about 1/9 that of the uncoated sample. The duty ratio and particle size of water droplets on the hydrophobic coating surface are smaller than those of the uncoated surface. The application sample effect toughing hydrophobic coating P-EL88 is the best,which can enhance significantly the surface hydrophobicity of the cover appliance and improve its insulation performance at the rain condition.

关 键 词：绝缘子遮蔽罩 疏水涂料 憎水性 湿闪电压 泄漏电流 图像识别 

分 类 号：TM216[一般工业技术—材料科学与工程] TP391.41[电气工程—电工理论与新技术]