Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Operation Method of Power Supply System for Eco-friendly Movable-weir Based on Natural Energy Sources

자연에너지를 이용한 친환경 가동보용 전원공급시스템의 운용방안

  • Kwon, Pil-June (Department of Electrical Engineering, Korea University of Technology and Education) ;
  • Lee, Hu-Dong (Department of Electrical Engineering, Korea University of Technology and Education) ;
  • Tae, Dong-Hyun (Department of Electrical Engineering, Korea University of Technology and Education) ;
  • Park, Ji-Hyun (Department of Electrical Engineering, Korea University of Technology and Education) ;
  • Ferreira, Marito (Department of Electrical Engineering, Korea University of Technology and Education) ;
  • Rho, Dae-Seok (Department of Electrical Engineering, Korea University of Technology and Education)
  • 권필준 (한국기술교육대학교 전기공학과) ;
  • 이후동 (한국기술교육대학교 전기공학과) ;
  • 태동현 (한국기술교육대학교 전기공학과) ;
  • 박지현 (한국기술교육대학교 전기공학과) ;
  • 페레이라 마리토 (한국기술교육대학교 전기공학과) ;
  • 노대석 (한국기술교육대학교 전기공학과)
  • Received : 2019.12.06
  • Accepted : 2020.02.07
  • Published : 2020.02.29
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Abstract

Recently, damage caused by drought is becoming worse and worse due to the global climate change. To overcome these problems, movable-weir to control the water level has been installed instead of a fixed-weir made from concrete. On the other hand, it is difficult to operate an existing moveable-weir because of the high cost of facility management and manpower consumption. In addition, because most moveable-weirs are installed in power systems, the operating cost and the cost of connection for power systems increase when they are located in remote areas. Therefore, this paper proposes an optimal design algorithm and the evaluation algorithm of the SOC (state of charge) of a lithium-ion battery to replace an existing power supply with eco-friendly movable-power with a power supply system using PV modules and lithium-ion batteries. In addition, this study modeled a 50kW power supply system of a movable-weir using PSCAD/EMTDC S/W. The simulation results confirmed that the proposed algorithm has stable operation characteristics in an independent operation mode and interconnection operation mode and that there is the possibility of commercialization with a benefits evaluation of the eco-friendly power supply system of a movable-weir.

최근, 세계적인 기후변화로 인하여 여름철마다 가뭄으로 인한 피해는 점점 심각해지는 상태이다. 이러한 문제를 해결하기 위하여, 산간오지에는 고정(콘크리트)보가 아닌 수위조절이 가능한 가동보가 설치되고 있다. 기존의 가동보 구동방식은 시설관리 및 인력소모로 인해 고가의 운용비용이 발생하여 운용상 어려움을 겪고 있다. 또한, 가동보는 대부분 전력계통과 연계하여 사용하고 있으므로 오지에 설치되는 경우, 전력계통 연계비용에 대한 부담이 증가하고 운용비용도 상승하는 문제점이 발생되고 있다. 따라서, 본 논문에서는 상기의 문제점들을 해결하기 위하여, 가동보(공압식)에 공급되는 기존의 전원을 태양광모듈과 리튬이온전지를 이용한 자연에너지 전원공급시스템으로 대체하는 최적 운용알고리즘과 리튬이온전지의 SOC(state of charge) 평가 알고리즘을 제시한다. 또한, 전력계통의 상용해석 프로그램인 PSCAD/EMTDC를 이용하여 50kW 전원공급시스템의 모델링을 수행하여, 독립운전모드와 계통연계운전모드에서 안정적으로 운용되고 있음을 확인하고, 투자비용에 대한 편익을 분석하여 상용화 가능성을 제시한다.

Keywords

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