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http://dx.doi.org/10.6113/TKPE.2021.26.2.90

Research on Protection Method for Ground Electrode of DC Systems from Corrosion  

Jeong, Woo-Yong (Dept. of Electrical, Electronic and Control Eng., Kongju National University)
Kim, Hyosung (Dept. of Electrical, Electronic and Control Eng., Kongju National University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.26, no.2, 2021 , pp. 90-95 More about this Journal
Abstract
In contrast to AC grounding systems, the ground electrode in DC systems continuously maintains positive or negative polarity. Ground electrodes with (+) polarity proceeds by oxidation reaction. Thus, the DC current should flow opposite to the polarity of the leakage current flowing through the (+) ground electrode by using a compensation electrode, and the current flowing through the (+) ground electrode can be 0A. However, according to protecting the (+) ground electrode, the compensation electrode corrodes and gets damaged. Thus, the (+) ground electrode must be protected from corrosion, and the service life of the compensation electrode must be extended. As an alternative, the average value of the current flowing through the compensation electrode should be equal with the value of the leakage current flowing through the (+) ground electrode by using the square waveform. Throughout the experiment, the degree of corrosion on the compensation electrode is analyzed by the frequency of the compensation electrode for a certain time. In the experiment, the frequencies of the square waveform are considered for 0.1, 1, 10, 20, 50, 100 Hz, and 1 kHz. Through experiments and analysis, the optimal frequency for reducing the electrolytic damage of the (+) electrode and compensation electrode in an LVDC grounding environment is determined.
Keywords
Ground electrode; Corrosion; Electrolytic damage; Frequency;
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  • Reference
1 Y. J. Kim and H. Kim, "Electrolytic corrosion of earth electrodes according to polarities in leakage current accident of low-voltage direct current," in KIEE Summer Conference 2018, pp. 1334-1335, Jul. 2018.
2 A. Yadav, A. Sharma, and M. Chandra "Corrosion control using DC current Parallel wire system," in International Conference on Advances in Engineering & Technology Research (ICAETR 2014), Aug. 2014.
3 S. Shankar, K. P. Pranav, and K. Raj, "Solar powered corrosion prevention in iron pipelines using impressed current cathodic protiection," in 14th International Conference on Environment and Electrical Engineering, May 2014.
4 M. H. Min, H. Jung, Y. Park, H. C. Kim, and M. C. Shin, "A simulation analysis on electrolytic corrosion protection system in DC feeding system," in KIEE Summer Conference 2011, pp. 2188-2189, Jul. 2011.
5 H. Y. Park, D. N. Shin, J. C. Sim, and G. S. Kim, "A study on the characteristics of the electrical corrosion by leakage current of seoul metro," in record of the Korean Society for Railway Autumn Conference, 2012.