Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Power Distribution Control Scheme for a Three-phase Interleaved DC/DC Converter in the Charging and Discharging Processes of a Battery Energy Storage System

  • Xie, Bing (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Wang, Jianze (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Jin, Yu (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Ji, Yanchao (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Ma, Chong (State Grid Fushun Electric Power Supply Company)
  • Received : 2017.12.02
  • Accepted : 2018.02.26
  • Published : 2018.07.20
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Abstract

This study presents a power distribution control scheme for a three-phase interleaved parallel DC/DC converter in a battery energy storage system. To extend battery life and increase the power equalization rate, a control method based on the nth order of the state of charge (SoC) is proposed for the charging and discharging processes. In the discharging process, the battery sets with high SoC deliver more power, whereas those with low SoC deliver less power. Therefore, the SoC between each battery set gradually decreases. However, in the two-stage charging process, the battery sets with high SoC absorb less power, and thus, a power correction algorithm is proposed to prevent the power of each particular battery set from exceeding its rated power. In the simulation performed with MATLAB/Simulink, results show that the proposed scheme can rapidly and effectively control the power distribution of the battery sets in the charging and discharging processes.

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References

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