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http://dx.doi.org/10.7837/kosomes.2012.18.4.360

Harmonic Reduction of Electric Propulsion System by Current Injection  

Kim, Jong-Su (Korea Maritime University)
Han, Won-Hui (Mokpo National Maritime University)
Seo, Dong-Hoan (Korea Maritime University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.18, no.4, 2012 , pp. 360-364 More about this Journal
Abstract
AC to DC converter that consists of relatively simple diode rectifier devices has been widely used in the field of the electric propulsion system. Also, since this rectifier includes large harmonics in the input current, a variety of researches have been developed to reduce the harmonics. The proposed method of this paper is to reduce the harmonics included in the input current of rectifiers and propulsion motor by injecting the output current of diode rectifier into the input of them. In addition, the proposed method ensures electrical safety through the respective isolation of the injection current, the source, and the loads using the Wye-Delta insulating transformer applied in current injection device that is installed in the input circuit of rectifiers and propulsion motor. The proposed method is simulated by applying to the electric propulsion ship that is currently operating. We confirm the validity of the proposed method compared with conventional power conversion system.
Keywords
Diode rectifier; Harmonic; Current injection; Current injection network; Current injection device; Insulating transformer;
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