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http://dx.doi.org/10.5916/jkosme.2014.38.7.916

A harmonic reduction scheme for 12-pulse diode rectifiers by auxiliary voltage supply  

Kim, Sung-Hwan (Marine System Engineering, Korea Marine Engineering University)
Kim, Jong-Su (Marine System Engineering, Korea Marine Engineering University)
Oh, Sae-Gin (Department of Ship Operation, Korea Marine Engineering University)
Yoon, Kyoung-Kuk (R&D center, SeaNet Co., Ltd.)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.38, no.7, 2014 , pp. 916-922 More about this Journal
Abstract
Diode rectifiers have been widely used for an AC to DC converter. But a big problem is that they include large harmonics components in the input currents. A 12-pulse configuration with phase shifting transformer is useful for reducing them. however, it still includes the ($12{\pm}1$)th (m; integer) harmonics in the input currents. In this paper, we propose a single-phase square wave auxiliary voltage supply which is inserted in the middle DC bus. It reduces harmonics especially the 11th and 13th and the harmonic characteristic becomes almost equivalent to a 24-pulse rectifier. Theoretical analysis of the combined 12-pulse diode rectifier with the auxiliary supply is presented and a control method of the auxiliary supply is proposed. The reduction in the input current harmonics is verified by simulation using software PSIM.
Keywords
12-pulse Diode rectifiers; Auxiliary Voltage Supply; Harmonics; Square Wave Voltage Supply;
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