Influence Mechanism of Positive DC Electric Field on Rime Ice Accretion on the Insulators and Its Experimental Verification

被引：0
作者：
Hu Y. [1 ]
Liu Z. [1 ]
Li X. [2 ]
Jiang X. [3 ]
Xian R. [1 ]
Du Q. [1 ]
机构：
[1] Shandong Engineering Laboratory of Smart Grid and Equipment, Shandong University of Technology, Zibo
[2] Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang
[3] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
来源：
Gaodianya Jishu/High Voltage Engineering | 2024年 / 50卷 / 02期
基金：
中国国家自然科学基金;
关键词：
charged water droplets; electric field-flow field coupling; ice branch; insulator icing; positive DC electric field;
D O I：
10.13336/j.1003-6520.hve.20230079
中图分类号：
学科分类号：
摘要：
Insulator icing is a key scientific problem in a complex atmospheric environment, which impairs the safe operation of power grid. Compared with the AC, DC electric field exerts adsorption on supercooled water droplets. However, few studies on this issue are available. In this paper, an electric field-flow field coupled simulation, as well as natural icing tests were carried out on two typical suspension insulators based on the principles of field charging, fluid mechanics, and electromagnetics. The results indicate that charged water droplets tend to move along the electric field lines in a DC electric field, and their trajectory deviation increases with increasing applied voltage and droplet diameter, while decreases with an increase of wind speed. Under DC electric field, ice branches form on the surface of the insulators. And there are significant differences in the normal electric field components on different insulator surfaces, which further affect the growth characteristics of ice branches. As the applied voltage increases, ice branches gradually spread from the edge of the shed to its surface. Moreover, the tips of ice branches become increasingly blunt. Ice amount and ice length of two insulators under energization are greater than those under non-energization, and the growth rate is more than 15%. The results lay the foundation for establishing a model for ice growth on energized insulator. © 2024 Science Press. All rights reserved.
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页码：793 / 804
页数：11
相关论文
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