A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System
Abstract
:1. Introduction
2. Conventional Power Balancing Methods of the Dual Active Bridge Converter
3. Theoretical Analysis of the Proposed DAB Converter
3.1. Operation of the Proposed DAB Converter
3.2. Analysis of the Power Balancing Function
3.3. Limitations of Module Expansion
4. Simulation Result
5. Experimental Result
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Appendix A. System Parameters
Parameter | Symbol | Value | Unit |
---|---|---|---|
Rated output power | 3 | kW | |
Input AC voltage | 2.2 | kV | |
Peak input AC voltage | 3.1 | kV | |
Each DC-link voltage | , i = 1, 2 | 1.25 | kV |
Total DC-link voltage | 2.5 | kV | |
Capacitance of DC-links | , i = 1, 2 | 500 | F |
Line inductance | 5 | mH | |
Switching frequency for rectifier | 10.8 | kHz | |
Switching frequency for converter | 15 | kHz | |
Primary half bridge capacitor | , i,j = 1, 2 | 100 | F |
Output voltage of DAB converter | 380 | V | |
Capacitance of output voltage | 1 | mH | |
Transformer turn ratio | n | 1:0.302 | |
Primary turns of DAB | 43 | ||
Secondary turns of DAB | 13 | ||
Secondary upper inductor | 150 | uH | |
Secondary lower inductor | 110 | uH | |
Magnetizing inductance of | 10 | mH | |
Magnetizing inductance of * | 5.5 | mH | |
Iron loss of * | 15.6 | kohm | |
Iron loss of * | 8.6 | kohm | |
Primary winding resistance of * | 100 | mohm | |
Primary winding resistance of * | 55 | mohm | |
Secondary winding resistance of * | 12 | mohm | |
Secondary winding resistance of * | 6.6 | mohm |
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Yun, H.-J.; Kim, H.-S.; Kim, M.; Baek, J.-W.; Kim, H.-J. A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System. Energies 2018, 11, 928. https://doi.org/10.3390/en11040928
Yun H-J, Kim H-S, Kim M, Baek J-W, Kim H-J. A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System. Energies. 2018; 11(4):928. https://doi.org/10.3390/en11040928
Chicago/Turabian StyleYun, Hyeok-Jin, Ho-Sung Kim, Myoungho Kim, Ju-Won Baek, and Hee-Je Kim. 2018. "A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System" Energies 11, no. 4: 928. https://doi.org/10.3390/en11040928