Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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A harmonic reduction scheme for 12-pulse diode rectifiers by auxiliary voltage supply

보조전원장치에 의한 12-펄스정류기의 고조파 저감

  • 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.)
  • Received : 2014.06.05
  • Accepted : 2014.09.22
  • Published : 2014.09.30
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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.

본 논문에서는 12-펄스정류기의 고조파 저감을 위해 12-펄스정류기의 커패시터 중앙 DC버스에 보조전원장치의 설치를 제안하였다. 그리고 이 장치에 의해 고조파가 감소되는 이론적인 배경을 다루었으며 부하전류의 크기에 따라 보조전원장치가 어떻게 제어되어야 하는지를 밝혔다. 본 논문에서 제안한 보조전원장치는 구형파 전압원을 적용함으로써 능동필터와 같은 다른 방식에 비해 시스템 구조가 간단하고 보다 저렴하다. 본 논문에서 제안하는 12-펄스정류기 고조파 저감법의 검증을 위해 소프트웨어 PSIM을 활용하였으며 제안된 방식의 유효성을 확인하였다.

Keywords

References

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