Using micro-nanostructure superhydrophobic coating with the unique self-cleaning phenomenon is a feasible method to further reduce the frequency of insulator pollution flashover. However, the research on the anti-pollution flashover performance of superhydrophobic coating is still insufficient. This paper analyzes the various types of forces on the polluted particles accumulated on the superhydrophobic coating surface, and calculates that the vertical force or the horizontal force on the nano-scale and micro-scale particles is positive when they are in contact with most types of droplets. After being fully wetted, these particles are easily absorbed or pulled by the droplets and leave the coating surface. So it is necessary to establish a new DC pollution flashover mechanism model of superhydrophobic coatings surface from the electric field perspective. Based on this model, the relationship between the pollution flashover voltage and the dry flashover voltage is clarified in the state of extremely small leakage current. Furthermore, the anti-pollution flashover performance experiment was carried out on superhydrophobic coating, RTV coating, and uncoated surface to test the leakage current under different conditions. The experimental results show that at any pollution degree, the leakage current of superhydrophobic coating surface always remains about 16.3μA after being completely wetted.

使用具有独特自洁现象的微纳米结构超疏水涂层是进一步降低绝缘子污闪频率的可行方法。然而，对超疏水涂层抗污闪性能的研究还很不足。本文分析了超疏水涂层表面累积的污染颗粒所受的各类力，计算出纳米级和微米级颗粒在与大多数类型的污染物接触时所受的垂直力或水平力为正值。飞沫。在完全润湿后，这些颗粒很容易被液滴吸收或拉动并离开涂层表面。因此有必要从电场角度建立新的超疏水涂层表面直流污闪机理模型。基于该模型，明确了漏电流极小状态下污闪电压与干闪络电压的关系。此外，对超疏水涂层、RTV涂层和未涂层​​表面进行了抗污闪性能实验，以测试不同条件下的漏电流。实验结果表明，在任何污染程度下，超疏水涂层表面完全润湿后的漏电流始终保持在16.3μA左右。明确了漏电流极小状态下污闪电压与干闪络电压的关系。此外，对超疏水涂层、RTV涂层和未涂层​​表面进行了抗污闪性能实验，以测试不同条件下的漏电流。实验结果表明，在任何污染程度下，超疏水涂层表面完全润湿后的漏电流始终保持在16.3μA左右。明确了漏电流极小状态下污闪电压与干闪络电压的关系。此外，对超疏水涂层、RTV涂层和未涂层​​表面进行了抗污闪性能实验，以测试不同条件下的漏电流。实验结果表明，在任何污染程度下，超疏水涂层表面完全润湿后的漏电流始终保持在16.3μA左右。