2017 2nd International Seminar on Advances in Materials Science and Engineering | |
Research on the influence of ac current overflowing on grounding electrode corrosion | |
Liu, Guohua^1 ; Wu, Zhen^1 ; Li, Wei^1 ; Zhang, Zhanlong^2 ; Mei, Daojun^2 | |
Quzhou Power Supply Company of State Grid, Zhejiang Electric Power Company, Kecheng District, Quzhou Zhejiang | |
324000, China^1 | |
State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Shapingba District Chongqing | |
400030, China^2 | |
关键词: Corrosion modeling; Corrosion potentials; Electric field induced; Electrode surfaces; Grounding current; High voltage transmission lines; Species diffusion; Stable operation; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012039/pdf DOI : 10.1088/1757-899X/231/1/012039 |
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来源: IOP | |
【 摘 要 】
In the power system, earth electrode is laid in the soil for current overflowing, to ensure secure and stable operation of power grid and electric accessory. Compared with general pipeline laid in the soil, earth electrode is under the circumstance of unbalanced grounding current of neutral point and electric field induced by high-voltage transmission line, so there is current straightly overflowing from electrode surface to the earth. Grounding current density carried by earth electrode is large, with an important effect on electrochemical corrosion of earth electrode in the soil. Based on the established corrosion model, this paper makes research on the influence of AC current overflowing on corrosion potential, current and deformation, without considering the effect of species diffusion. What is more, the relationship between the amount of corrosion deformation and the frequency of ground current is also studied.
【 预 览 】
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