Impact of Hydrophobicity on Wetting Characteristics of Composite Insulators

To perfect the wetting mechanism of hydrophobic insulators, it is urgent to explore the impact of hydrophobicity on wetting characteristics of the pollution layer of composite insulators. In this article, the wetting test of the hydrophobic pollution layer was carried out in artificial hot fog. The local surface conductivity of the pollution layer with different hydrophobicity were measured. The test results show that the local surface conductivities of different hydrophobic pollution layers are obviously different at the same wetting time. For researching the regularity of wetting process in greater detail, three characteristic quantities were proposed to represent the wetting characteristics. They are the duration of local surface conductivity close to zero (DLSCCZ), the saturated wetting time (SWT) and the maximum value of local surface conductivity (MVLSC). With the enhancement of hydrophobicity of the pollution layer, DLSCCZ and SWT increase, while MVLSC and the growth velocity of local surface conductivity both decrease.

[1]  Xingliang Jiang,et al.  Study on the Wetting Process and Its Influencing Factors of Pollution Deposited on Different Insulators Based on Leakage Current , 2013, IEEE Transactions on Power Delivery.

[2]  G. Karady.  The effect of fog parameters on the testing of artificially contaminated insulators in a fog chamber , 1975, IEEE Transactions on Power Apparatus and Systems.

[3]  M. Ramesh,et al.  Prediction of flashover voltage using electric field measurement on clean and polluted insulators , 2020 .

[4]  S. Pitroda,et al.  ARTIFICIAL POLLUTION TEST ON HIGH VOLTAGE INSULATORS TO BE USED ON AC SYSTEMS , 2013 .

[5]  Caixin Sun,et al.  Study on DC Pollution Flashover Performance of Various Types of Long String Insulators Under Low Atmospheric Pressure Conditions , 2010, IEEE Transactions on Power Delivery.

[6]  Lin Yang,et al.  Comparison of pollution flashover performance of porcelain long rod, disc type, and composite UHVDC insulators at high altitudes , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[7]  Liming Wang,et al.  Research on Wetting Characteristics of Insulator in Ultrasonic Fog , 2018, 2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).

[8]  Meng-Ju Lin,et al.  Sticking Effect on Cantilever Beam with Wetting Length of Liquid Less Than Beam Length after Spinning Drying , 2006, 2006 International Microsystems, Package, Assembly Conference Taiwan.

[9]  Qi Li,et al.  The Development of Low-Current Surface Arcs Under Clean and Salt-Fog Conditions in Electricity Distribution Networks , 2018, IEEE Access.

[10]  Liming Wang,et al.  Wetting characteristics of artificial contamination on the hydrophobic surface , 2019, Engineering Failure Analysis.

[11]  Xingliang Jiang,et al.  Additional salt deposit density of polluted insulators in salt fog , 2016 .

[12]  Liming Wang,et al.  Effects of natural contamination components on the surface conductivity under saturated moisture , 2017, IEEE Transactions on Dielectrics and Electrical Insulation.

[13]  Lin Yang,et al.  A Recognition Method of the Hydrophobicity Class of Composite Insulators Based on Features Optimization and Experimental Verification , 2018 .

[14]  Wetting Processes on a Contaminated Insulator Surface , 1982, IEEE Power Engineering Review.

[15]  Shenghuan Yang,et al.  Aging Process Evaluation Method of Silicone Rubber in Composite Insulators in Natural Environmental Experiment Station , 2019, IEEE Access.

[16]  Zhicheng Guan,et al.  Influence of partial electric arc on the contamination degree monitoring system in view of leakage current , 2018, IEEE Transactions on Dielectrics and Electrical Insulation.

[17]  A. Wilson,et al.  Monitoring contamination level on insulator materials under dry condition with a microwave reflectometer , 2016, IEEE Transactions on Dielectrics and Electrical Insulation.

[18]  Kai Gao,et al.  Condition Evaluation of the Contaminated Insulators by Visible Light Images Assisted With Infrared Information , 2018, IEEE Transactions on Instrumentation and Measurement.

[19]  K. Niayesh,et al.  Contribution of Design Parameters of SiR Insulators to Their DC Pollution Flashover Performance , 2014, IEEE Transactions on Power Delivery.

[20]  M. Mirzaie,et al.  Reliability assessment of aged SiR insulators under humidity and pollution conditions , 2020, International Journal of Electrical Power & Energy Systems.

[21]  R. Gorur,et al.  Source strength impact analysis on polymer insulator flashover under contaminated conditions and a comparison with porcelain , 2016, IEEE Transactions on Dielectrics and Electrical Insulation.

[22]  Liming Wang,et al.  A Low-Cost Evaluation and Correction Method for the Soluble Salt Components of the Insulator Contamination Layer , 2019, IEEE Sensors Journal.

[23]  Liming Wang,et al.  Influence of temperature difference on wetting characteristics of insulators , 2017, IEEE Transactions on Dielectrics and Electrical Insulation.