Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Development of ESS Based on VRFB-LFPB Hybrid Batteries

VRFB-LFPB 하이브리드 배터리 기반의 ESS 개발에 관한 연구

  • Cheon, Young Sik (Institute of R&D Center, KEPCO KPS) ;
  • Park, Jin Soo (Institute of R&D Center, KEPCO KPS) ;
  • You, Jinho (Department of Software Convergence Engineering, Mokpo National University) ;
  • Lee, Jin (Department of Electrical Engineering, Mokpo National University)
  • 천영식 (한전KPS 기술연구원) ;
  • 박진수 (한전KPS 기술연구원) ;
  • 유진호 (목포대학교 융합소프트웨어학과) ;
  • 이진 (목포대학교 전기공학과)
  • Received : 2017.10.31
  • Accepted : 2017.11.13
  • Published : 2018.01.01
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Abstract

High-power lithium batteries are suitable for equipment with high power output needs, such as for ESS's initial start-up. However, their management cost is increased by the installation of air-conditioning to minimize the risk of explosion due to internal temperature rise and also by a restriction on the number of charge/discharge cycles. High-capacity flow batteries, on the other hand, have many advantages. They can be used for over 20 years due to their low management costs, resulting from no risk of explosion and a high number of charge/discharge cycles. In this paper, we propose an ESS based on hybrid batteries that uses a lithium iron phosphate battery (LiFePO) at the initial startup and a vanadium redox flow battery (VRFB) from the end of the transient period, with a bi-directional PCS to operate two batteries with different DC voltage levels and using an efficient energy management control algorithm.

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References

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