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http://dx.doi.org/10.6109/jkiice.2015.19.6.1515

Design of an Active Shaft Grounding System for the Elimination of Alternating Electromagnetic Field in Vessel  

Kim, Tae-kue (Department of Electric Engineering, Changwon National University)
Ahn, Ho-kyun (Department of Electric Engineering, Changwon National University)
Yoon, Tae-sung (Department of Electric Engineering, Changwon National University)
Park, Seung-kyu (Department of Electric Engineering, Changwon National University)
Kwak, Gun-pyong (Department of Electric Engineering, Changwon National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.19, no.6, 2015 , pp. 1515-1524 More about this Journal
Abstract
Recently, for the purpose of preventing the corrosion of a vessel, the electrical corrosion protection device that prevents the corrosions of the hull and the propeller is widely used. However, the electrical corrosion protection method artificially emits the current into the seawater around the hull using the power supply in order to make the hull and propeller be in the state of not being corrosion, so that electromagnetic field is generated outside the hull by the current emitted into the seawater. In this paper, the static and alternating constituents of the electromagnetic field generated in underwater outside the hull are analyzed and a countermeasure is investigated to reduce the strength of the electromagnetic field. In conventional shaft grounding system, the shaft potential is maintained above at least 100mV and the alternating current component constitutes more than 10% of the total current. However, in this paper, a control system was designed in order that the alternating current component and the shaft potential which generate electromagnetic field are maintained within 1% and 2mV respectively, and the performance was verified by simulation.
Keywords
alternating electromagnetic field; shaft grounding; impressed current corrosion protection; impedance variation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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