Design and performance evaluation of a bidirectional isolated dc-dc converter with extended dual-phaseshift scheme

This study describes the design and performance evaluation of a bidirectional isolated dc-dc converter with an extended dual-phase-shift (EDPS) scheme. The operation principle and equivalent circuits with consideration of the deadband are presented. The deadband effect with EDPS is different from the conventional phase-shift (CPS) scheme, and the corresponding compensation coefficient is determined. Different operation modes are identified with respect to phase-shift angles of EDPS and load conditions. The safe operational area is also analysed with the comparison of different operation modes. The output voltage and output power characteristics with open-loop or closed-loop operation are discussed. The average theoretical 48.5% reduction in the output voltage ripple using EDPS has been achieved. The average reduction in inductor peak and rms with EDPS are statistically calculated as 37.8 and 26.8%. The measured efficiency has improved from 68.1% using CPS to 81.9% using EDPS for low-power application.

[1]  C. D. de Silva,et al.  Stability Analysis of Isolated Bidirectional Dual Active Full-Bridge DC–DC Converter With Triple Phase-Shift Control , 2012, IEEE Transactions on Power Electronics.

[2]  Hua Bai,et al.  Operation, design and control of dual H-bridge-based isolated bidirectional DC-DC converter , 2008 .

[3]  Hirofumi Akagi,et al.  Topology and application of bidirectional isolated dc-dc converters , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[4]  Haihua Zhou,et al.  Hybrid Modulation for Dual-Active-Bridge Bidirectional Converter With Extended Power Range for Ultracapacitor Application , 2009 .

[5]  Juan Carlos Balda,et al.  Extending the ZVS Operating Range of Dual Active Bridge High-Power DC-DC Converters , 2006 .

[6]  G.O. Garcia,et al.  Switching Control Strategy to Minimize Dual Active Bridge Converter Losses , 2009, IEEE Transactions on Power Electronics.

[7]  Hua Bai,et al.  The Short-Time-Scale Transient Processes in High-Voltage and High-Power Isolated Bidirectional DC–DC Converters , 2008, IEEE Transactions on Power Electronics.

[8]  Hui Li,et al.  High-Frequency Transformer Isolated Bidirectional DC–DC Converter Modules With High Efficiency Over Wide Load Range for 20 kVA Solid-State Transformer , 2011, IEEE Transactions on Power Electronics.

[9]  Qingguang Yu,et al.  Extended-Phase-Shift Control of Isolated Bidirectional DC–DC Converter for Power Distribution in Microgrid , 2012, IEEE Transactions on Power Electronics.

[10]  B. Lin,et al.  Asymmetrical pulse-width modulation bidirectional DC-DC converter , 2008 .

[11]  J.L. Duarte,et al.  Transformer-Coupled Multiport ZVS Bidirectional DC–DC Converter With Wide Input Range , 2008, IEEE Transactions on Power Electronics.

[12]  Wenhua Liu,et al.  Power Characterization of Isolated Bidirectional Dual-Active-Bridge DC–DC Converter With Dual-Phase-Shift Control , 2012, IEEE Transactions on Power Electronics.

[13]  Johann W. Kolar,et al.  Efficiency-Optimized High-Current Dual Active Bridge Converter for Automotive Applications , 2012, IEEE Transactions on Industrial Electronics.

[14]  Hua Bai,et al.  Eliminate Reactive Power and Increase System Efficiency of Isolated Bidirectional Dual-Active-Bridge DC–DC Converters Using Novel Dual-Phase-Shift Control , 2008, IEEE Transactions on Power Electronics.

[15]  Jing Sun,et al.  Power Flow Characterization of a Bidirectional Galvanically Isolated High-Power DC/DC Converter Over a Wide Operating Range , 2010, IEEE Transactions on Power Electronics.

[16]  Rou-Yong Duan,et al.  High-efficiency bidirectional DC-DC converter with coupled inductor , 2012 .

[17]  Robert L. Steigerwald,et al.  A comparison of high power DC-to-DC soft-switched converter topologies , 1994 .

[18]  Jaehong Kim,et al.  Asymmetric duty control of the dual-active-bridge DC/DC converter for single-phase distributed generators , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[19]  German G Oggier,et al.  Modulation strategy to operate the dual active bridge DC-DC converter under soft switching in the whole operating range , 2011, IEEE Transactions on Power Electronics.

[20]  N. Schibli.  DC-DC Converters for Two-Quadrant Operation with Controlled Output Voltage , 1999 .

[21]  T. Abe,et al.  Design and Performance of a Bidirectional Isolated DC–DC Converter for a Battery Energy Storage System , 2012, IEEE Transactions on Power Electronics.