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access icon openaccess Analysis on structural parameters and electrical performance of dc deep well grounding electrode

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 24/08/2018, Accepted 19/09/2018, Published 26/10/2018

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.

Inspec keywords: earth electrodes; surface potential; current density; conductors (electric)

Other keywords: structural parameter analysis; electrical parameters; cross-sectional diameter; DWGEs; dc deep well grounding electrode; dissipation current density; ground resistance; electrical performance; simulation model; shallow buried horizontal grounding electrodes; sub-ground electrodes; surface potential; vertical grounding electrodes

Subjects: Protection apparatus

References

    1. 1)
      • 18. Jianwu, W., Zhongdong, D., Jiayuan, L., et al: ‘Grounding performance study and economic comparison on vertical grounding electrodes of UHVDC’, High Volt. Eng., 2006, 32, (9), pp. 59–61.
    2. 2)
      • 1. Licheng, L.: ‘Development of HVDC transmission technology and its role in power network in China’, Electr. Equip., 2004, 5, (11), pp. 1–3.
    3. 3)
      • 12. Hongshan, L., Zhuohong, P.: ‘A new kind of DC grounding electrode: wide-area grounding electrode’, Guangdong Electr. Power, 2010, 23, (11), pp. 67–72.
    4. 4)
      • 15. Yuanyuan, F., Jian, L.: ‘Analysis on the influence of HVDC grounding electrode's ground current on the corrosion of buried metal pipelines’, South. Power Syst. Technol., 2013, 7, (6), pp. 71–75.
    5. 5)
      • 11. Jianwu, W., Jingsong, Z., Yan, L., et al: ‘Primary research on HVDC WAN grounding electrode’, High Volt. Appar., 2010, 46, (12), pp. 25–28.
    6. 6)
      • 7. Jinliang, H., Rong, Z.: ‘Rounding technology of power system’ (Science Press, Beijing, China, 2007, 1st edn.) pp. 312–364, 267–268.
    7. 7)
      • 5. Wangjun, Z.: ‘High voltage direct current transmission engineering technology’ (China Electric Power Press, Beijing, China, 2004, 1st edn.), pp. 387–449.
    8. 8)
      • 9. Zhida, K.: ‘Research on the plan of independent earth electrode reconstructed to common earth electrode’, South. Energy Constr., 2015, 2, (3), pp. 112–117.
    9. 9)
      • 6. Girdinio, P., Molfino, P., Nervi, M., et al: ‘Technical and compatibility issues in the design of HVDC sea electrodes’, IEEE Int. Symp. Electromagn. Compat., Rome, Italy, 17-21 September 2012.
    10. 10)
      • 17. Yihua, Z., Qi, G., Shuyong, L., et al: ‘Realization of high voltage direct current operating without grounding electrode’, Autom. Electr. Power Syst., 2016, 40, (16), pp. 153–158.
    11. 11)
      • 2. Licheng, L.: ‘Technical characteristics and engineering applications of UHVDC power transmission’, Electr. Equip., 2006, 7, (3), pp. 1–4.
    12. 12)
      • 4. Xuming, L., Ping, Z., Yong, C.: ‘Recent advances in high-voltage direct-current power transmission and its developing potential’, Power Syst. Technol., 2012, 36, (4), pp. 1–9.
    13. 13)
      • 10. Fuchun, Z., Ting, G., Xiaochen, L., et al: ‘Influence of ground-return current of ± 800 kV and ± 500 kV converter stations sharing a common grounding electrode on potential distribution’, Electr. Power Constr., 2014, 35, (7), pp. 115–120.
    14. 14)
      • 3. Hong, R., Donghui, Z., Xiaobin, Z., et al: ‘Practice and analyses of UHVDC power transmission’, High Volt. Eng., 2015, 41, (8), pp. 2481–2488.
    15. 15)
      • 13. Liansheng, Z.: ‘Impact of HVDC ground electrode current on the adjacent power transformers’, High Volt. Eng., 2005, 31, (4), pp. 57–58.
    16. 16)
      • 16. Xinghe, C., Yujun, Z.: ‘Protective distance between HVDC electrode and underground metal pipeline’, Power Syst. Technol., 2008, 32, (2), pp. 71–74.
    17. 17)
      • 8. Biao, W., Yuhong, W., Lijie, D., et al: ‘Summary of HVDC grounding electrode and related issues’, Proc. Chin. Soc. Univ., 2012, 24, (1), pp. 66–72.
    18. 18)
      • 19. Shangmao, H., Hansheng, C., Lei, J., et al: ‘Simulation on electrical characteristics of DC deep earthing electrode in project application’, South. Power Syst. Technol., 2015, 9, (7), pp. 16–21.
    19. 19)
      • 14. Hansheng, C., Shangmao, H., Gang, L., et al: ‘Influence of wengyuan DC grounding electrode current of niuzhai-conghua HVDC project on DC bias of adjacent power transformers’, South. Power Syst. Technol., 2015, 9, (7), pp. 11–15.
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