Establishment of Earth Model for HVDC Earth Electrode in Complicated Terrain

被引：0
|
作者：
Xiong Q. [1 ]
Wang M. [1 ]
Huang H. [1 ]
Shi Y. [2 ]
Tang H. [3 ]
机构：
[1] College of Electrical Engineering and New Energy, China Three Gorges University, Yichang, 443002, Hubei Province
[2] State Grid Economic and Technological Research Institute Co., Ltd., Changping District, Beijing
[3] Enshi Power Supply Company, State Grid Hubei Electric Power Company, Enshi, 445000, Hubei Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Composite layering; Earth surface potential; Ground electrode; HVDC; Soil model;
D O I：
10.13334/j.0258-8013.pcsee.182115
中图分类号：
学科分类号：
摘要：
How to construct a soil electrical model that can accurately reflect the true characteristics of the soil near the DC grounding electrode is an extremely important but unresolved problem. Thousands of amps of the direct current is injected into the earth through the grounding electrode, which will cause surface potential distortion near the grounding pole. It brings serious safety hazards to production and life in the surrounding areas. However, at present, the typical grounding pole model is equivalent to a point current source, which cannot reflect the influence of the he grounding pole size. It is extremely limited and has limited accuracy in calculating the step voltage and the contact potential. Aiming at the above problems, this paper proposed a three-dimensional soil electrical model based on line current source and a calculation method of earth surface potential (ESP). Firstly, based on the theory, the calculation method of any potential at the grounding polar surface and any of the following points under complicated terrain were derived. And then based on the soil resistivity survey data of an actual grounding project, a composite layered soil model modeling method based on line current source was proposed. Finally, the simulation calculation of the earth surface potential and the maximum step voltage near the grounding pole was completed in COMSOL, which verifies the rationality and advancement of the model. © 2020 Chin. Soc. for Elec. Eng.
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页码：2269 / 2277
页数：8
相关论文
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