한국전자통신학회논문지 (The Journal of the Korea institute of electronic communication sciences)

한국전자통신학회 (Korea Institute of Electronic Communication Science)
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DC μ-Grid 기반 배터리 충/방전 시스템의 에너지 효율에 관한 연구

A Study on Energy Efficiency of Battery Charge/Discharge System based on DC μ-Grid

  • 여성대 (서울과학기술대학교 NID융합기술대학원) ;
  • 김종운 (서울과학기술대학교 NID융합기술대학원) ;
  • 이경량 (서울과학기술대학교 NID융합기술대학원) ;
  • 한철규 ;
  • 류태형 ;
  • 김경화 (서울과학기술대학교 전기정보공학과) ;
  • 김성권 (서울과학기술대학교 NID융합기술대학원)
  • 투고 : 2015.11.03
  • 심사 : 2015.12.24
  • 발행 : 2015.12.31
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초록

Li-ion 배터리를 생산하는데 있어서 충/방전을 통한 formation 과정이 필요하다. 이 과정에서 방전기의 부하 저항을 통해 방전하게 되는데 이때 에너지 손실이 발생한다. 따라서 본 논문에서는 DC ${\mu}-Grid$ 기반의 충/방전 시스템에서 배터리를 효율적으로 운영하는 방안에 대해 연구하였다. 컴퓨터 시뮬레이션 결과, DC ${\mu}-Grid$ 기반의 충/방전 시스템에서 충전 배터리 set 3개 기준 대비 방전 배터리 set의 수가 133%를 초과하게 되면 망 전압이 안정화되는 과정에서 발생하는 전압 fluctuation 폭을 초과하기 때문에 시스템에 치명적인 손상을 야기한다. 따라서 충전 배터리 set 3개 기준 대비 방전 배터리 set의 수를 133%까지 운영할 수 있으며 획기적인 에너지 절감 효과를 확인할 수 있었다.

Formation process through charge/discharge operation is needed in manufacturing Li-ion battery. In the process battery is discharged by a load resistor of discharger. Here, energy losses happen. Therefore, in this paper, the efficient energy operation of battery is studied in the charge/discharge system based on DC ${\mu}-Grid$. A result of computer simulation shows that if in the charge/discharge system based on DC ${\mu}-Grid$, the number of discharge batteries in comparison with three charge battery sets exceeds 133%, voltage fluctuation that occurs while the grid voltage stabilizes, which makes the system fatal. Therefore, it was demonstrated that a remarkable energy saving effect could be achieved when the number of discharge battery set is maintained to be 133% in comparison with three charge battery sets.

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참고문헌

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