Affiliation:
1. School of Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Abstract
Aiming at the optimization of current stress with low voltage ratio and full ZVS, a control method combining variable duty cycle and phase shift was proposed based on dual active bridge (DAB) converters with DC blocking capacitors. By adding DC bias to the DC blocking capacitors, asymmetric duty modulation (ADM) can adjust the bias as needed. Based on the theoretical analysis of steady-state operation, the operating modes can be divided into eight modes. According to the features of each mode, equivalent circuits are established. The transmission power and the boundary of zero-voltage-switching (ZVS) are deduced through a detailed analysis of each mode. Based on the theoretical deduction, ADM is more suitable for a low voltage ratio. Verified by experiment, optimized asymmetric duty modulation (OADM) can increase efficiency by 3.58%, 6.57%, 8.81%, and 10.33% compared with DPS when P is equal to 0.36 and m is equal to 0.4, 0.3, 0.2, and 0.1, respectively. Using this method, the current stress of the converter is lighter than that under regular modulation when the voltage ratio m ≤ 0.5 with full ZVS.
Funder
National Natural Science Foundation of China
Postgraduate Research and Practice Innovation Program of Jiangsu Province
Graduate Innovation Program of the China University of Mining and Technology
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference20 articles.
1. Unified fast-dynamic direct-current control scheme for intermediary inductive AC-link isolated DC-DC converters;Hou;IEEE Open J. Power Electron.,2021
2. Jeong, D.-K., Kim, H.-S., Baek, J.-W., Kim, J.-Y., and Kim, H.-J. (2016, January 1–4). Dual active bridge converter for Energy Storage System in DC microgrid. Proceedings of the 2016 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific), Busan, Republic of Korea.
3. Omran, A.H., Said, D.M., and Hussin, S.M. (2020, January 11–12). A Survey of Different DC Faults in a Solar Power System. Proceedings of the 2020 IEEE 8th Conference on Systems, Process and Control (ICSPC), Melaka, Malaysia.
4. A three-phase soft-switched high-power-density DC/DC converter for high-power applications;Divan;IEEE Trans. Ind. Appl.,1991
5. A general and automatic RMS current oriented optimal design tool for LLC resonant converters;Wei;IEEE J. Emerg. Sel. Topics Power Electron.,2022
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