Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Battery-inductor-supercapacitor hybrid energy storage system for DC microgrids

  • Dam, Duy-Hung (Department of Electrical Engineering, University of Ulsan) ;
  • Lee, Hong-Hee (Department of Electrical Engineering, University of Ulsan)
  • Received : 2019.09.10
  • Accepted : 2019.11.14
  • Published : 2020.01.20
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Abstract

This paper presents a new configuration for a hybrid energy storage system (HESS) called a battery-inductor-supercapacitor HESS (BLSC-HESS). It splits power between a battery and supercapacitor and it can operate in parallel in a DC microgrid. The power sharing is achieved between the battery and the supercapacitor by combining an internal battery resistor and an output LSC filter, which consists of a supercapacitor and an inductor. The battery current is smoothened to supply and receive only the low-frequency current component under any disturbance and load condition through cooperation with the supercapacitor. Complete guidelines to design the parameters of the BLSC-HESS are also presented. Simulation and experimental results demonstrate that the proposed BLSC-HESS configuration achieves a high-stability performance and a lower cost, and is easily applied to DC microgrids.

Keywords

Acknowledgement

This work was supported in part by the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2018R1D1A1A09081779) and in part by the KETEP and the MOTIE (No. 20194030202310).

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