Multi-Mode Control of a Bidirectional Converter for Battery Energy Storage System

Kuo-Yuan Lo (), Kuo-Hsiang Liu, Li-Xin Chen, Ching-Yu Chen, Chang-Heng Shih and Jyun-Ting Lin
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Kuo-Yuan Lo: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan
Kuo-Hsiang Liu: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan
Li-Xin Chen: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan
Ching-Yu Chen: Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan 325207, Taiwan
Chang-Heng Shih: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan
Jyun-Ting Lin: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan

Energies, 2022, vol. 15, issue 21, 1-18

Abstract: In this paper, a bidirectional converter with multi-mode control strategies is proposed for a battery energy storage system (BESS). This proposed converter, which is composed of a half-bridge-type dual-active-bridge (HBDAB) converter and an H-bridge inverter, is able to operate the BESS with different power conditions and achieve the DC–AC function for lower input DC voltage applications. For the HBDAB converter, the variable-frequency control (VFC) and phase-shift control (PSC) are both adopted to achieve zero-voltage switching over a wider power range and the battery module balance control capability for BESS, respectively. In addition, the interleaved configuration is used to reduce the current ripple and increase the overall current rating. For the H-bridge inverter, the unipolar control mode (UCM) and totem-pole control mode (TPCM) are adopted to manage the real and reactive current control under different AC grid conditions. The UCM offers a reduction in current ripple for real and reactive power control. The TPCM is able to eliminate switching losses and achieve higher conversion efficiency for pure real power control. Considering applications for battery energy storage systems, the principle of operation and voltage gain analysis are described. Finally, computer simulations and hardware experimental results from a prototype system are presented to verify the performance of the proposed converter with the different control strategies.

Keywords: DAB converter; totem-pole converter; battery energy storage system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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