Study on the effect of fracture structure adjacent to ground electrodes of UHVDC power transmission lines on earth surface potential distribution

被引：0
|
作者：
Guo M. [1 ]
Fan Y. [1 ]
Geng S. [1 ,2 ]
Gong X. [3 ]
机构：
[1] School of Electrical Engineering, Xinjiang University, Urumqi
[2] Handan Power Supply Company, State Grid Hebei Electric Power Company, Handan
[3] Changji Power Supply Company, State Grid Xinjiang Electric Power Company, Changji
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Earth electrode address; Earth surface potential; Fracture structure; Soil geological model; UHVDC;
D O I：
10.7667/PSPC180025
中图分类号：
学科分类号：
摘要：
In order to improve the complicated soil structure reasonable grounding location and avoid HVDC system monopole ground operation into the adverse effects of the current to the power grid, a composite soil geological model is set up for the typical fracture structure near the UHVDC grounding electrode. The calculation formula of surface potential is derived by combining the traveling wave method with the mirror image method. Based on the Matlab simulation platform, the surface potential distribution of two soil models under horizontal and composite conditions is compared, and the surface potential distribution under the influence of fracture and parameters is studied. The results show that the surface potential is closer to the measured value under the composite soil geological model. The distance from the fault to the ground electrode has great influence on the surface potential in the large area. The influence of the electrical resistivity at the fracture site is mainly considered in the near area of the grounding electrode. The conclusion is of great significance to locate the site of the ground pole and prevent the DC magnetic bias. © 2019, Power System Protection and Control Press. All right reserved.
引用
收藏
页码：73 / 79
页数：6
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