Effect of Coatings on the Electrostatic Motion of Water Droplets on the Surface of Conductors and Corona Discharges Under DC Fields

被引：0

作者：

Li Y. ^{[1
]}

Li Q. ^{[1
]}

Xu S. ^{[2
]}

Liu R. ^{[3
]}

Jiang X. ^{[1
]}

机构：

[1] Xuefeng Mountain Energy Equipment Safety National Observation and Research Station, Chongqing University, Chongqing

[2] Jinhua Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd., Jinhua

[3] Chongqing Electric Power College, Chongqing

来源：

Gaodianya Jishu/High Voltage Engineering | 2024年 / 50卷 / 04期

基金：

中国国家自然科学基金;

关键词：

coatings; corona discharge; electrohydrodynamics; high voltage direct current transmission; multiphase flow;

D O I：

10.13336/j.1003-6520.hve.20231880

中图分类号：

学科分类号：

摘要：

Corona discharge phenomenon on overhead transmission lines is usually caused by conductor surface projections, such as raindrops, dirt, etc., of which raindrops produce the most common corona discharge phenomenon. At present, the research on the corona discharge mechanism of DC transmission lines is still not deep or enough in the world, thus, corona discharge has also become one of the problems to be solved for the development of high voltage DC transmission. In this paper, the ball-plate test platform was adopted to study the influences of coating of the aluminium ball in the surface layer attached to the water droplets on the DC corona characteristics, and the the droplets electroluminescent movement characteristics of aluminium surface were also investigated. The simulation software was adopted to establish the droplets electroluminescent movement of the multiphase flow model, and the coating contact angle and the droplet movement morphology on the droplets around the field strength distribution of the impact are analyzed. The results show that the droplet radius decreases with the increase of contact angle, and the droplet length increases and then decreases with the increase of contact angle; the droplet adsorption effect on the surface of the superhydrophilic coating is stronger, the motion amplitude of the droplet is greatly reduced, and the distortion degree of the electric field strength around the droplet is small; meanwhile, the RMS value of the corona current pulse is the lowest; it is difficult for the droplet to exist steadily on the surface of the superhydrophobic coating, and the distortion degree of field strength around the droplet is larger, which is very likely to occur under the electric field effect. Under the action of electric field, jetting phenomenon is very easy to occur, and the degree of distortion of field strength will be reduced after jetting of water droplets. © 2024 Science Press. All rights reserved.

引用

页码：1781 / 1791

页数：10

共 27 条

[1] ZHU Lei, LIU Yunpeng, JIA Boyan, Et al., Application of surface coating in the anti-corona measure of the power transmission line conductor, High Voltage Engineering, 40, 7, pp. 1994-1999, (2014)
[2] YIN Fanghui, JIANG Xingliang, Influences of electric field of conductors surface on conductor icing, High Voltage Engineering, 44, 3, pp. 1023-1033, (2018)
[3] XU Jilai, GAO Keli, WAN Baoquan, Et al., Numerical calculation and measurement of DC total field using unipolar flux line method as initial value, High Voltage Engineering, 47, 6, pp. 2091-2098, (2021)
[4] WANG Haitao, ZHENG Lei, LI Jian, Et al., Optimization design and measurement test of a split low/zero insulator detection robot for 500 kV porcelain insulator strings, High Voltage Engineering, 46, 9, pp. 3035-3043, (2020)
[5] WAN Baoquan, WU Xiaorui, PEI Chunming, Et al., Calculation method for acoustic power based on multivariant regression method for AC transmission lines, High Voltage Engineering, 43, 4, pp. 1354-1361, (2017)
[6] CHEN Lan, WANG Liming, BIAN Xingming, Aged transmission lines conductor's corona characteristic and impact on electromagnetic environment, High Voltage Engineering, 40, 9, pp. 2734-2742, (2014)
[7] CHEN Bo, LU Tiebing, XU Peng, Et al., Characterization of surface roughness of HVDC transmission lines in ion flow field models, High Voltage Engineering, 45, 5, pp. 1443-1450, (2019)
[8] LI Zhenyu, JIANG Xingliang, LI Licheng, Et al., Corona performance of coated conductors under raining condition, High Voltage Engineering, 43, 11, pp. 3740-3747, (2017)
[9] SHI Shilin, HAO Jian, LIU Hongbo, Et al., Simulation and verification of space charge density distribution of gas around wire in corona cage based on hybrid numerical model, High Voltage Engineering, 48, 6, pp. 2434-2443, (2022)
[10] CLADE J J, GARY C H., Predetermination of corona losses under rain: influence of rain intensity and utilization of a universal chart, IEEE Transactions on Power Apparatus and Systems, PAS-89, 6, pp. 1179-1185, (1970)

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