Open AccessAnalysis on structural parameters and electrical performance of dc deep well grounding electrode
Author(s) -
Teng Yun,
Wen Xishan,
Cai Hansheng,
Jia Lei,
Liu Gang,
Hu Shangmao,
Lu Hailiang
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8594
Subject(s) - electrode , ground , materials science , voltage , dissipation , current density , current (fluid) , electrical engineering , electrical resistance and conductance , composite material , engineering , physics , thermodynamics , quantum mechanics
Deep well‐grounding electrodes (DWGE) have advantage of smaller occupied area, and the number of sub‐ground electrodes is less than that of the vertical grounding electrodes, thus has a good development prospects. Here, the simulation model of the electrical parameters of the DWGEs is established, and the electrical performance of the same length DWGE and the horizontal grounding electrodes is compared. The influence of length and the cross‐sectional diameter on the electrical performance of electrodes is studied. The simulation results and analysis show that compared with the shallow buried horizontal grounding electrodes, the DWGEs have the performance of smaller ground resistance and lower maximum step voltage. By increasing the length of grounding electrodes, the ground resistance, the maximum dissipation current density, and step voltage decrease, the surface potential of the nearby area decreases. Increasing the cross‐sectional diameter to improve the electrical performance of electrodes is not obvious, except for the dissipation current density. It is suggested that the length of the DWGEs in the project should not exceed 1500 m and the diameter of the coke is less than 0.4 m.