Working principle analysis and control algorithm for bidirectional DC/DC converter

B.Y. Li, C. Xu, C. Li, Z. Guan


A bidirectional DC/DC converter is an important part of the DC micro grid system, playing a key role in the stable operation
of the system and the coordinated distribution of power. To solve the problem of unstable busbar voltage when the energy
transforms bidirectionally in the DC micro grid system, a control algorithm based on closed-loop proportion integral derivative
was proposed in this study. The hardware cinarcuit of the bidirectiol DC/DC converter was designed in the DC micro grid
energy storage system, and the characteristics of converter efficiency in charging mode and constant voltage output were
studied by small-signal modeling of the bidirectional DC/DC converter in charging and discharging systems. Experimental
data were used to prove the correctness of the theoretical analysis. The results demonstrate that the current-controlled
precision changes steadily in the charging mode when the output voltage is constant and the charging current is adjustable
in ranges between 1 A and 2 A. When the charging current is 2 A and the output voltage ranges from 24 V to 36 V, the
change rate of the charging current undergoes stable changes. In the discharge mode, when the output voltage is stable,
the converter conversion rate changes steadily. When the output voltage changes in the range between 32 V and 38 V, the
bidirectional DC/DC circuit automatically switches over the work patterns and maintains the stability of the output voltage.
This study achieves bidirectional transmission of energy by rational hardware design of a bidirectional DC/DC converter and
improves the reliability of the DC micro grid energy storage system. The proposed method provides a good prospect of
a control scheme for the bidirectional DC/DC converter to optimize practical engineering design.

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Q. Zhong, Y. Yi, Analysis and simulation of voltage drop problem in

power users, Journal of Electric Power Systems and Automation 20 (6)

(2008) 102–106.

R. Shao, J. Han, Zhengwei nad Lin, Power quality index analysis, Journal

of Power System and Its Automation 19 (3) (2007) 118–121.

Y. Liu, C. Huang, L. Ou, et al., Three-phase unbalanced voltage sag

detection method based on dq transform, Journal of Power System

and Automation 19 (3) (2007) 72–76.

Y. Zhou, W. Luo, Design and simulation of bidirectional DC/DC converter

topology, Automation Expo 10 (2012) 102–105.

X. Liang, Simulation and design of dc/dc converter control, Ph.D. thesis,

Qingdao University of Science and Technology, Qingdao (2016).

D. M. Xu, X. Wu, J. Zhang, Z. Qian, High power high frequency halfwave-

mode ZCT-PWM full bridge DC/DC converter, in: Applied Power

Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth

Annual IEEE, Vol. 1, IEEE, 2000, pp. 99–103.

K. Ramya, V. Jegathesan, Comparison of pi and pid controlled bidirectional

dc-dc converter systems, International Journal of Power Electronics

and Drive Systems 7 (1) (2016) 56.

N. Jabbour, C. Mademlis, I. Kioskeridis, Improved performance in a

supercapacitor-based energy storage control system with bidirectional

dc-dc converter for elevator motor drives, in: International Conference

on Power Electronics, Machines and Drives (PEMD’14), IET, Manchester,

UK, 2014.

G. Borocci, F. G. Capponi, G. De Donato, F. Caricchi, Closed-loop fluxweakening

control of hybrid-excitation synchronous machine drives,

IEEE Transactions on Industry Applications 53 (2) (2017) 1116–1126.

Z. Yu, L. Nie, H. Lv, et al., A review of DC access technology for electric

vehicle charging station, Journal of Electrical and Mechanical Engineering

(2) (2015) 279–284.

D. Jiang, F. Liu, R. Mao, X. Yuan, Buck-boost integrated three-port

DC-DC converter with coupling inductor, Automation of Electric Power

System 38 (3) (2014) 7–13.

Y. Cai, C.Wang, Y.Wang, Study on dab lcc resonant bidirectional dc/dc

converter, Journal of Coal Engineering 47 (2) (2015) 92–94.

P. Lin, Bidirectional DC/DC converter designing based on microcomputer,

Computer Knowledge and Technology 13 (13) (2017) 210–211.

X. Wei, D. Dai, New type bi-directional DC/DC converter PID control

based on arranging transient process, Journal of Electric Power Science

and Engineering 33 (8) (2017) 6–12.

L. Zhao, J. Li, W. Fan, Y. Zhang, X. Zhang, Design of bidirectional

DC/DC converter based on STC89C51, Journal of Electrical Design

A (2017) 56–57.

F. Z. Peng, H. Li, G.-J. Su, J. S. Lawler, A new ZVS bidirectional DCDC

converter for fuel cell and battery application, IEEE Transactions

on power electronics 19 (1) (2004) 54–65.

C. Shi, X. Tang, N. Li, G. Sun, Y. Sun, Dc conversion technology based

on full bridge isolation bidirectional converter, Journal of Electrotechnical

Society 31 (2) (2016) 121–127.

Y. Tong, G. Wu, X. Jin, et al., Topological study of bidirectional dc/dc

converters, Proceeding of the CSEE 27 (13) (2017) 81–86.

F. Akar, Y. Tavlasoglu, E. Ugur, B. Vural, I. Aksoy, A bidirectional nonisolated

multi-input DC–DC converter for hybrid energy storage systems

in electric vehicles, IEEE Transactions on Vehicular Technology

(10) (2016) 7944–7955.

G. Waltrich, M. A. Hendrix, J. L. Duarte, Three-phase bidirectional

dc/dc converter with six inverter legs in parallel for ev applications,

IEEE Transactions on Industrial Electronics 63 (3) (2016) 1372–1384.

K. Lang,W. Lin, Y. Xu, Current status of two-way dc/dc converter circuit

topology, in: China Electrotechnical Society of Electric Power Society

Academic Conference, China, Beijing, 2008, pp. 1–5.

Y. Zhang, Y. Gao, J. Li, M. Sumner, Interleaved switched-capacitor

bidirectional DC-DC converter with wide voltage-gain range for energy

storage systems, IEEE Transactions on Power Electronics 99 (2017)


L. Huang, X. Dong, C. Xie, S. Quan, Y. Gao, Research and modeling

of the bidirectional half-bridge current-doubler DC/DC converter, International

Journal of Rotating Machinery 2017.

R. Anand, P. M. Mary, Improved dynamic response of dc to dc converter

using hybrid pso tuned fuzzy sliding mode controller, Circuits

and Systems 7 (06) (2016) 946–955.

R. S. Balog, P. T. Krein, Bus selection in multibus dc microgrids, IEEE

Transactions on Power Electronics 26 (3) (2011) 860–867.

G. Lu, L. Zhang, Y. Bu, Y. Zhou, Study on front-end bidirectional dc/dc

converter of photovoltaic grid-connected inverter, International Journal

of Mechatronics and Applied Mechanics 1 (2017) 45–52.

F. Zhang, Two-way DC/DC converter, Master’s thesis, Nanjing University

of Aeronautics and Astronautics, Nanjing (2005).

F. Zhang, C. Zhu, Y. Yan, Control model of bidirectional DC/DC converter,

Proceeding of the CSEE 25 (11) (2015) 46–49.


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