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http://dx.doi.org/10.6113/TKPE.2022.27.5.391

High Efficiency Voltage Balancing Dual Active Bridge Converter for the Bipolar DC Distribution System  

Lee, Minsu (School of Electrical Engineering, KAIST)
Cheon, Sungmoon (LM Converter project. LG Magna.)
Choi, Dongmin (School of Electrical Engineering, KAIST)
Moon, Gun-Woo (School of Electrical Engineering, KAIST)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.27, no.5, 2022 , pp. 391-396 More about this Journal
Abstract
In this study, a new voltage-balancing dual-active bridge converter that integrates a DAB converter with a voltage balancer is proposed for a bipolar DC distribution system. The proposed converter is configured to connect two loads to the transformer secondary center tap of the DAB converter, and no additional components are added. The proposed converter has the same operation as the conventional DAB converter, and it makes both output voltages similar. Moreover, the imbalanced current offset between the two loads is bypassed only on the secondary side of the transformer. Consequently, the proposed converter integrates a voltage balancer without any additional components, and no additional loss occurs in the corresponding components. Thus, high efficiency and high power density can be achieved. The feasibility of the proposed converter is verified using 3 kW prototypes under 380 V input and 190/190 V output conditions.
Keywords
Dual active bridge converter; Voltage balancer; Bipolar DC distribution system; Integration circuit;
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1 K. H. Andersen, M. Nymand, "Digital estimating and balancing of transformer magnetizing current in an isolated full bridge converter," in Proc. 2018 IEEE Southern Power Electron. Conf, pp. 1-6, Apr. 2018.
2 A. T. Elsayed, A. A. Mohamed, and O. A. Mohammed, "DC microgrids and distribution systems: An overview," Electric power systems research, Vol. 119, pp. 407-417, Feb. 2015.   DOI
3 J. W. Kolar and G. Ortiz, "Solid-state-transformers: Key components of future traction and smart grid systems," in Proc. Int. Power Electron. Conf., Hiroshima, Japan, pp 18-21, May. 2014.
4 H. Kakigano, Y. Miura, and T. Ise, "Low-voltage bipolar-type dc microgrid for super high quality distribution," IEEE Trans. Power Electron., Vol. 25, No. 12, pp. 3066-3075, Dec. 2010.   DOI
5 F. Wang, Z. Lei, X. Xu, and X. Shu, "Topology deduction and analysis of voltage balancers for DC microgrid," IEEE J. Emerg. Sel. Topics Power Electron., Vol. 5, No. 2, pp. 672-680, Jun. 2017.   DOI
6 J. Y. Lee, Y. P. Cho, and J. H. Jung, "Single-stage voltage balancer with high-frequency isolation for bipolar LVDC distribution system," IEEE Trans. Industrial Electron., Vol. 67, No. 5, pp. 3596-3606, May. 2020.   DOI
7 Bai, H., Mi, C. "Eliminate reactive power and increase system efficiency of isolated bidirectional dual-active-bridge DC-DC converters using novel dual-phase-shift control," IEEE Trans. Power Electron, Vol. 23, No. 6, pp 2905-2914, Nov. 2008.   DOI
8 B. Zhao, Q. Song, W. Liu, and Y. Sun, "Overview of dual-activebridge isolated bidirectional dc-dc converter for high-frequency-link power-conversion system," IEEE Trans. Power Electron., Vol. 29, No. 8, pp. 4091-4106, Aug. 2014.   DOI
9 Z. Wang, J. Chai, and X. Sun, "Method to control flux balancing of high frequency transformers in dual active bridge dc-dc converters," J. Eng., Vol. 2018, No. 17, pp. 1835-1843, 2018.   DOI
10 D. Kumar, F. Zare, and A. Ghosh, "DC microgrid technology: system architectures, AC grid interfaces, grounding schemes, power quality, communication networks, applications, and standardizations aspects," IEEE Access, Vol. 5, pp. 12230-12256, Jun. 2017.   DOI
11 N. Hou, and Y. W. Li, "Overview and comparison of modulation and control strategies for a nonresonant single-phase dual-active-bridge DC-DC converter," IEEE Trans. Power Electron,. Vol. 35, No. 3, pp 3148-3172. Mar. 2020.   DOI
12 X. Zhang, and C. Gong, "Dual-buck half-bridge voltage balancer," IEEE Trans. Industrial Electron., Vol. 60, No. 8, pp 3157-3164, Aug. 2013.
13 X. Zhang, C. Gong, and Z. Yao, "Three-level DC converter for balancing DC 800-V voltage," IEEE Trans. Power Electron., Vol. 30, No. 7, pp 3499-3507, Jul. 2015.   DOI
14 J. Y. Lee, H. S. Kim, and J. H. Jung, "Enhanced dual-active-bridge DC-DC converter for balancing bipolar voltage level of DC distribution system," IEEE Trans. Industrial Electron., Vol. 67, No. 12, pp. 10339-10409, Dec. 2020.
15 C. Mi, H. Bai, C. Wang, and S. Gargies, "Operation, design and control of dual H-bridge-based isolated bidirectional dc-dc converter," IET Power Electron., Vol. 1, No. 4, pp. 507-517, Apr. 2008.   DOI
16 B. R. Shrestha, U. Tamrakar, T. M. Hansen, B. P. Bhattarai, S. James, and R. Tonkoski, "Efficiency and reliability analyses of AC and 380 V DC distribution in data centers," IEEE Access, Vol. 6, pp. 63305-63315, Oct. 2018.   DOI
17 Y. Panov, M. M. Jovanovic, and B. T. Irving, "Novel transformer-fluxbalancing control of dual-active-bridge bidirectional converters," in Proc. IEEE Appl. Power Electron. Conf. Expo., pp. 42-49, Mar. 2015.