Power flow control and ZVS analysis of three limb high frequency transformer based three-port DAB

The work presented in this paper focuses on the power flow control and study of three-limb high frequency transformer enabled three port Dual Active Bridge(DAB) converter, using 1200V and 1700V SiC devices. The advantage of using three-limb transformer is given by the low inter-winding parasitic capacitances due to placement of windings on different limbs and elimination of inter-winding insulations unlike concentric windings. The focus of the paper is based on power characterization for independent power flow of three port DAB using modulation control, and ZVS scenario study under the modulation control. Detailed analysis for power flow control and turn-on/turn-off ZVS conditions have been realized. A laboratory scale prototype using SiC Mosfets has been made and experimental results have been obtained for 500V dc input voltages and 1000V dc output voltage at 8.2kW of power.

[1]  Xu Zhen-lin,et al.  A novel multi-port DC-DC converter for hybrid renewable energy distributed generation systems connected to power grid , 2008, 2008 IEEE International Conference on Industrial Technology.

[2]  J.W. Kolar,et al.  A novel three-phase three-port UPS employing a single high-frequency isolation transformer , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[3]  Subhashish Bhattacharya,et al.  A mode switching, multiterminal converter topology with integrated fluctuating renewable energy source without energy storage , 2014, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014.

[4]  Jianguo Zhu,et al.  Modeling of magnetic flux in multi-winding toroidal core high frequency transformers using 3D reluctance network model , 2015, 2015 IEEE 11th International Conference on Power Electronics and Drive Systems.

[5]  Loganathan Umanand,et al.  Integrated magnetics based multi-port bidirectional DC-DC converter topology for discontinuous-mode operation , 2012 .

[6]  Subhashish Bhattacharya,et al.  Control of modular dual active bridge DC/DC converter for photovoltaic integration , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[7]  J. W. Kolar,et al.  Improved Core-Loss Calculation for Magnetic Components Employed in Power Electronic Systems , 2012, IEEE Transactions on Power Electronics.

[8]  Subhashish Bhattacharya,et al.  Transformer less Intelligent Power Substation design with 15kV SiC IGBT for grid interconnection , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[9]  B. Hull,et al.  High Switching Performance of 1700-V, 50-A SiC Power MOSFET Over Si IGBT/BiMOSFET for Advanced Power Conversion Applications , 2016, IEEE Transactions on Power Electronics.

[10]  Subhashish Bhattacharya,et al.  Modular isolated DC-DC converter with multi-limb transformer for interfacing of renewable energy sources , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).

[11]  Subhashish Bhattacharya,et al.  Three-phase 4.16 kV medium voltage grid tied AC-DC converter based on 15 kV/40 a SiC IGBTs , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[12]  A. F. Witulski,et al.  Derivation, calculation and measurement of parameters for a multi-winding transformer electrical model , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[13]  J. Kolar,et al.  Controllable dυ/dt behaviour of the SiC MOSFET/JFET cascode an alternative hard commutated switch for telecom applications , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[14]  Xinbo Ruan,et al.  Experimental measurement and modeling of multi-winding high-voltage transformer , 2008, 2008 International Conference on Electrical Machines and Systems.

[15]  J. Biela,et al.  An innovative bidirectional isolated multi-port converter with multi-phase AC ports and DC ports , 2013, 2013 15th European Conference on Power Electronics and Applications (EPE).