scholarly journals Study on Earth Surface Potential and DC Current Distribution around DC Grounding Electrode

2013 ◽  
Vol 05 (04) ◽  
pp. 792-796 ◽  
Author(s):  
Zhi-chao Ren ◽  
Chun-yan Ye ◽  
Hai-yan Wang
Keyword(s):  
Surface Potential ◽  
Current Distribution ◽  
Earth Surface ◽  
Grounding Electrode ◽  
Dc Current

DC Current Distribution in Both AC Power Grids and Pipelines Near HVDC Grounding Electrode Considering Their Interaction

2019 ◽  
Vol 34 (6) ◽  
pp. 2240-2247 ◽  
Author(s):  
Bo Zhang ◽  
Fangyuan Cao ◽  
Rong Zeng ◽  
Jinliang He ◽  
Xiaobo Meng ◽  
...  
Keyword(s):  
Current Distribution ◽  
Power Grids ◽  
Ac Power ◽  
Grounding Electrode ◽  
Dc Current

scholarly journals FEM Analysis and Sensor-Based Measurement Scheme of Current Distribution for Grounding Electrode

2020 ◽  
Vol 10 (22) ◽  
pp. 8151
Author(s):  
Li Zhu ◽  
Hui Jiang ◽  
Fan Yang ◽  
Hanwu Luo ◽  
Wenzhen Li ◽  
...  
Keyword(s):  
Current Distribution ◽  
Soil Analysis ◽  
Fem Analysis ◽  
Simulation Models ◽  
Current Data ◽  
Frozen Soil ◽  
Power Equipment ◽  
Soil Resistivity ◽  
Measurement Scheme ◽  
Grounding Electrode

The current distribution of the grounding electrode in a high-voltage direct current (HVDC) transmission system affects the state of power equipment in its vicinity, which depends on the soil resistivity and shape of the grounding electrode. In this paper, current distribution in the vicinity of an ±800 kV grounding electrode is investigated by simulation and experiments. Firstly, the model to calculate the current distribution with two typical frozen soils is set up, and simulation models and experimental platforms are established; meanwhile, the finite element method (FEM) is used to calculate the current and potential dispersion of linear, cross-shaped, and ring-shaped grounding electrodes in the simulation models. After obtaining the lab current data from the simulation, an innovative method based on a “drainage wire” with a Hall sensor is proposed to measure the current in an experimental setup. The results show that current and potential distribution characteristics are related to the shape of the grounding electrode and soil resistivity. Meanwhile, the current measurement scheme can measure the current in soil with a lower error. This article concludes that these two typical models can reduce the complexity of frozen soil analysis, and the measurement scheme can accurately monitor the current to reduce the damage to the surrounding power equipment.

scholarly journals Frequency and Time Domain Analysis of Influence of the Grounding Electrode Conductivity on Induced Current Distribution

2013 ◽  
Vol 9 (2) ◽  
pp. 137 ◽  
Author(s):  
Silvestar Šesnić ◽  
Dragan Poljak
Keyword(s):  
Current Distribution ◽  
Time Domain ◽  
Current Source ◽  
Time Domain Analysis ◽  
Finite Conductivity ◽  
Significant Discrepancy ◽  
Electrode Current ◽  
Air Interface ◽  
Grounding Electrode ◽  
Time Domain Response

The paper deals with an assessment of the influence of finite conductivity to the current induced along the horizontal grounding electrode. Analysis is performed in frequency and time domain, respectively. Current distribution along the grounding electrode buried in a lossy half-space is determined via analytical solution of the corresponding Pocklington equation in the frequency domain. The corresponding time domain response is obtained by means of Inverse Fast Fourier Transform (IFFT). The electrode is excited via an equivalent current source. Presence of the earth-air interface is taken into account via the simplified reflection coefficient arising from the Modified Image Theory (MIT). The electrode current is calculated for the case of perfectly conducting (PEC) electrode and for the electrodes made of copper and aluminum. Comparison of results shows no significant discrepancy between these electrodes, justifying the use of a PEC electrode approximation.

scholarly journals The effect of soil model on earth surface potential and reasonable selection method for soil model

2013 ◽  
Vol 62 (14) ◽  
pp. 144102
Author(s):  
Li Wen-Feng ◽  
Yang Hong-Geng ◽  
Xiao Xian-Yong ◽  
Li Xing-Yuan
Keyword(s):  
Surface Potential ◽  
Selection Method ◽  
Earth Surface ◽  
Soil Model
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