Wetting characteristics of artificial contamination on the hydrophobic surface
Source abstract
Abstract
Abstract Pollution flashover has a significant influence on the stable operation of power system. Pollution accumulation and wetting of insulator are the two prerequisites for the pollution flashover. In this paper, the wetting characteristics of artificial contamination on the silicone rubber surface are studied. The results showed that the wetting process of hydrophobic surface differed greatly from the hydrophilic surface. After the silicone rubber contaminated, the sodium chloride originally mixed evenly in the contamination layer gradually recrystallized and precipitated out of the layer during the drying process. Due to the recrystallization phenomenon, water drops were produced firstly at the location of sodium chloride crystals regardless of hydrophobicity. The newly formed small water drops exhibited the highest salinity and then the salinity decreased gradually over time in the wetting process. The soluble salts on the area between the water drops on silicone rubber surface were also dissolved partially. The results might provide a reference for the artificial contamination test of composite insulators.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High voltage insulation and dielectric phenomena · Aerosol Filtration and Electrostatic Precipitation · Image Enhancement Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Current transformer failure caused by electric field associated to circuit breaker and pollution in 500 kV substations10.1016/j.engfailanal.2018.05.017 ↗
2. The need of creating a new nominal creepage distance in accordance with heaviest pollution 500kV overhead line insulators10.1016/j.engfailanal.2017.12.018 ↗
3. Tracking and erosion resistance of LSR and HTV silicon rubber samples under acid rain conditions10.1109/TDEI.2018.006672 ↗
4. Comparative tests on RTV silicone rubber coated porcelain suspension insulators in a salt-fog chamber10.1109/TDEI.2018.006968 ↗
5. Interpretation of surface degradation on polymeric insulators10.1016/j.engfailanal.2018.09.007 ↗
6. Flashover mechanism of silicone-rubber insulators used for outdoor insulation .210.1109/61.473355 ↗
7. Farzaneh · 2009
8. Effect of environment factors on ac flashover performance of 3 units of polluted insulator strings under natural fog condition10.1109/TDEI.2014.004214 ↗
9. Modeling of the salt dissolving process of wet natural pollution on silicone rubber insulators
10. Evaluation of wetting condition and its effects on pollution flashover voltage of aerodynamic insulators10.1109/TDEI.2016.7736848 ↗
11. Conductivuty of aqueous dust solutions10.1109/TEI.1987.298984 ↗
12. Effects of natural contamination components on the surface conductivity under saturated moisture10.1109/TDEI.2017.006558 ↗
13. Pattern analysis of discharge characteristics for hydrophobicity evaluation of polymer insulator10.1109/TDEI.2011.5704500 ↗
14. Effective equivalent salt deposit density of polluted silicone rubber insulators in wetting process
15. Experimental investigation on pollution flashover performance of multiple parallel suspension insulators10.1109/TDEI.2016.7736844 ↗
16. Effect of arcing on DC flashover performance of contaminated porcelain insulators for various suspension patterns at high altitudes10.1109/TDEI.2008.4543116 ↗
17. Influence of composite insulator shed design on contamination flashover performance at high altitudes10.1109/TDEI.2011.5931060 ↗
18. Contribution of design parameters of SiR insulators to their DC pollution flashover performance10.1109/TPWRD.2013.2285223 ↗
19. Pollution flashover performance of full-scale ±800 kV converter station post insulators at high altitude area10.1109/TDEI.2013.6518940 ↗
20. Study on AC pollution flashover performance of composite insulators at high altitude sites of 2800–4500 m10.1109/TDEI.2009.4784559 ↗
21. Influence of air flow on hydrophobicity transfer of polluted high temperature vulcanized silicone rubber samples
22. International Electrotechnical Commission IEC 60815–1 2008–10 · 2008