Study on the morphology evolution of condensation droplet on superhydrophobic coating surface and its influence on surface discharge

LIU Huijia; Wang Shaoqi; Wu Tian; WU Jian; ZHU Wei; Chen Panfeng

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Study on the morphology evolution of condensation droplet on superhydrophobic coating surface and its influence on surface discharge

更新时间：2025-03-31

- Study on the morphology evolution of condensation droplet on superhydrophobic coating surface and its influence on surface discharge
- Moren Journal (2025)
- 作者机构：
  
  1.三峡大学湖北省输电线路工程技术研究中心,湖北省宜昌市443002
  2.三峡大学电气与新能源学院,湖北省宜昌市443002
  3.浙江泰仑电力集团有限责任公司,浙江省湖州市313000
  4.国网浙江省湖州供电有限公司,浙江省湖州市313000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51807110)
- DOI：
  CLC：
- Received：29 November 2024，
  
  Revised：06 January 2025，
  
  Accepted：08 February 2025，
- 稿件说明：
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LIU Huijia, Wang Shaoqi, Wu Tian, et al. Study on the morphology evolution of condensation droplet on superhydrophobic coating surface and its influence on surface discharge[J/OL]. Moren journal, 2025.
DOI：

LIU Huijia, Wang Shaoqi, Wu Tian, et al. Study on the morphology evolution of condensation droplet on superhydrophobic coating surface and its influence on surface discharge[J/OL]. Moren journal, 2025. DOI：

摘要

在高湿度大温差条件下室内开关设备内部构件表面极易出现凝露，危害设备的安全稳定运行。为解决电场下开关设备表面凝露液滴形貌演化对其沿面绝缘性能影响，以环氧树脂板为基底利用喷涂法制备了超疏水和普通硬质疏水涂层，搭建了人工凝露试验箱对不同凝露时间下超疏水、普通硬质疏水及无涂层表面进行了闪络试验，观测了3种试品表面的凝露状态、交流场下的闪络特性及液滴的动态行为。利用基于图像的边缘检测方法对电场作用下3种试品表面的凝露形貌演变过程进行了统计分析。结果表明：随着凝露时间增加，超疏水表面液滴呈球状分布，体积逐渐增大，且始终小于其他2种试品；超疏水表面放电过程稳定，闪络后其表面没有明显烧蚀痕迹；超疏水表面液滴出现滚动合并和电致伸缩行为，方向与外施电场基本一致；加压过程中超疏水表面液滴覆盖率始终为三者最低，从16.95%下降至5.17%，且闪络前液滴平均尺寸＜1mm

，远低于其他2种试品。

Abstract

Under the condition of high humidity and large temperature difference

the surface of internal components of indoor switchgear is easy to condensation

which endangers the safe and stable operation of the equipment. In order to solve the effect of surface condensation droplet morphology evolution on the surface insulation performance of switchgear under electric field

superhydrophobic and ordinary rigid hydrophobic coatings were prepared by spraying method on epoxy resin plate as the base

and an artificial condensation test chamber was built to conduct flashover tests on superhydrophobic

ordinary rigid hydrophobic and uncoated surfaces under different condensation time. The condensation state of the surface

the flashover characteristics and the dynamic behavior of the droplet in the AC field were observed. An image-based edge detection method was used to make a statistical analysis of the evolution process of the condensation morphology of three samples under the action of electric field. The results show that with the increase of condensation time

the droplets on the superhydrophobic surface are spherically distributed and their volume increases gradually

and they are always smaller than the other two samples. The discharge process of the superhydrophobic surface is sta

ble

and there is no obvious ablative trace on the surface after flashover. The droplet on the superhydrophobic surface shows rolling merging and electrostriction behavior

and the movement direction is basically consistent with the applied electric field. In the process of voltage increase

the droplet coverage on the superhydrophobic surface is always the lowest

which decreases from 16.95% to 5.17%

and the average droplet size before flashover is

1mm

which is much lower than the other two samples.

关键词

Keywords

references

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