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Grid-tied Power Conditioning System for Battery Energy Storage Composed of 2-stage DC-DC converter

2단 DC-DC 컨버터로 구성된 배터리 에너지저장용 계통연계형 전력변환장치

  • 박아련 (명지대학교 대학원 전기공학과) ;
  • 김도현 (명지대학교 대학원 전기공학과) ;
  • 김경태 (명지대학교 대학원 전기공학과) ;
  • 한병문 (명지대학교 전기공학과) ;
  • 이준영 (명지대학교 전기공학과)
  • Received : 2012.07.18
  • Accepted : 2012.11.13
  • Published : 2012.12.01

Abstract

This paper proposes a new grid-tied power conditioning system for battery energy storage, which is composed of a 2-stage DC-DC converter and a PWM inverter. The 2-stage DC-DC converter is composed of an LLC resonant converter connected in cascade with a 2-quadrant hybrid-switching chopper. The LLC resonant converter operates in constant duty ratio, while the 2-quadrant hybrid-switching chopper operates in variable duty ratio for voltage regulation. The operation of proposed system was verified through theoretical analysis and computer simulations. Based on computer simulations, a hardware prototype was built and tested to confirm the technical feasibility of proposed system. The proposed system could have relatively higher efficiency and smaller size than the existing system.

Keywords

References

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