Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Energy Management Technology Development for an Independent Fuel Cell-Battery Hybrid System Using for a Household

가정용 독립 연료전지-배터리 하이브리드 에너지 관리 기술 개발

  • 양석란 (한국전력공사 전력연구소 신재생에너지연구소) ;
  • 김정석 (한국전력공사 전력연구소 신재생에너지연구소) ;
  • 최미화 (한국전력공사 전력연구소 신재생에너지연구소) ;
  • 김영배 (전남대학교 기계공학부)
  • Received : 2019.03.08
  • Accepted : 2019.04.30
  • Published : 2019.04.30
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Abstract

The energy management technology for an independent fuel cell-battery hybrid system is developed for a household usage. To develop an efficient energy management technology, a simulation model is first developed. After the model is verified with experimental results, three energy management schemes are developed. Three control techniques are a fuzzy logic control (FLC), a state machine control (SMC), and a hybrid method of FLC and SMC. As the fuel cell-battery hybrid system is used for a house, battery state of charge (SOC) regulation is the most important factor for an energy management because SOC should be kept constant every day for continuous usage. Three management schemes are compared to see SOC, power split, and fuel cell power variations effects. Experimental results are also presented and the most favorable strategy is the state machine combined fuzzy control method.

Keywords

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Fig. 1. Configuration of PEMFC-battery hybrid system

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Fig. 2. Polarization curve for the fuel cell model

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Fig. 3. Equivalent circuit of battery model

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Fig. 4. Internal resistance of battery

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Fig. 5. Integrated hybrid model using Matlab/Simulink

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Fig. 6. Flowchart of SMC

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Fig. 7. 3-D fuzzy rules

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Fig. 8. Hybrid rules combined with SMC and FLC

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Fig. 9. Hybrid power experimmental platform

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Fig. 10. Required load power

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Fig. 11. Simulation and experimental results for battery current

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Fig. 12. Simulation and experimental results for bus voltage

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Fig. 13. Variation of power split for SMC and hybrid method (SMC+FLC)

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Fig. 14. Fuel consumption variation

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Fig. 15. Battery SOC variation

Table 1. Specification of hybrid power system

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