A structure with IVS self-balancing for an ISOP-DAB converter

被引：0
作者：
Fan E. [1 ,2 ]
Zhao L. [1 ,2 ]
Li Y. [1 ,2 ]
Ge Q. [1 ,2 ]
Ma C. [1 ,2 ]
机构：
[1] Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2023年 / 51卷 / 23期
关键词：
common-duty-ratio control; coupling capacitor; dual-active-bridge (DAB) converter; input voltage sharing (IVS); input-series output-parallel (ISOP); self-balancing;
D O I：
10.19783/j.cnki.pspc.230729
中图分类号：
学科分类号：
摘要：
The input voltage sharing (IVS) active control strategies of input-series output-parallel (ISOP) dual-active-bridge (DAB) converters have the problems of a complex control system and a large number of sensors. Passive approaches have concise control, and so have obvious advantages. Based on passive voltage balancing, a self-balancing topology with IVS for ISOP-DAB converter adopting coupling capacitors is proposed. Through coupling capacitors, the high-frequency-links of submodules are electrically coupled, thereby realizing the balance of input voltages of submodules. Also, a simplified equivalent circuit of the proposed ISOP-DAB converter with coupling capacitors is provided, and theoretical analysis and derivation are carried out to obtain the relationship between the input bus voltage deviation of the submodules and the coupling capacitor current to the converter parameters. The theoretical calculation results show that the proposed topology has better IVS capability in the presence of relatively large deviations among submodules. Finally, the feasibility and effectiveness of the proposed topology are verified by simulation and experiment. © 2023 Power System Protection and Control Press. All rights reserved.
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页码：141 / 150
页数：9
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