Divergence Law of Ground Current about DC Transmission System

Abstract:

The calculation formula for divergence of DC grounding current was put forward. The divergence of DC grounding current at different directions in the earth was studied. The main factors include the pattern of electrode, distance between sending end area and receiving end area, earth structure, etc. Some important conclusions were discovered. When observation point is close to DC grounding electrode, the pattern electrode has a big effect on the divergence of DC grounding current. When observation point is far from DC grounding electrode, soil structure has an effect on the divergence of DC grounding current. When the distance between DC grounding electrodes in the sending end area and receiving end area is short, the interaction of two electrodes should be considered.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 1123-1126
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.1123
• Online since: October 2014
• Authors: Zhi Chao Ren*, Guang Ning Wu
• Keywords: Distance, Divergence of Dc Grounding Current, Earth Structure, Pattern of Electrode, Receiving End Area, Sending End Area

References

[1] Xie Guangrun. Grounding technology of power system[M]. Beijing. China Electric Power Press, (1989).

[2] Chen Cixuan. Thermal stability of the grounding grid and distribution of leakage current density along the grounding conductors[J]. High Voltage Engineering, 1987, (2): 33-38.

[3] Wei Dejun. Electro-Corrosion Impacts of DC Grounding Electrode on Underground Metallic Facilities[J]. Power System Technology, 2008, 32(2): 75-77.

[4] P.J. Lagace, J.L. Houle, H. Greiss, et al. Computer Aided Evaluation of Pipeline Current Near Totoidal HVDC Ground Electrodes[J]. IEEE Transactions on Power Delivery, 1989, 4(1): 216-222.

DOI: 10.1109/61.19207