Dynamic model of a dual active bridge suitable for solid state transformers

The Solid State Transformer (SST) is considered one of the most promising components in future energy systems. Its multiples advantages make it a promising solution in the future power grid when compared with the conventional fundamental-frequency transformer. Among different components, the Dual Active Bridge (DAB), consisting of two H-bridges and a high-frequency link, it is considered the key in the SST operation. In this paper a theoretical analysis to obtain the average and the small-signal models of the DAB is presented. Both models are used to design a PI controller to regulate the output voltage at the desired reference. Extensive time-domain simulations are carried out in order to validate the presented models. Results show that the output voltage follows the commanded reference under variations in the input voltage and the load current.

[1]  Wenhua Liu,et al.  Overview of Dual-Active-Bridge Isolated Bidirectional DC–DC Converter for High-Frequency-Link Power-Conversion System , 2014, IEEE Transactions on Power Electronics.

[2]  Subhashish Bhattacharya,et al.  Design Considerations of a 15-kV SiC IGBT-Based Medium-Voltage High-Frequency Isolated DC–DC Converter , 2015, IEEE Transactions on Industry Applications.

[3]  Johann W. Kolar,et al.  Volume/weight/cost comparison of a 1MVA 10 kV/400 V solid-state against a conventional low-frequency distribution transformer , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[4]  J. Kimball,et al.  Closed-Loop Control of DC–DC Dual-Active-Bridge Converters Driving Single-Phase Inverters , 2014, IEEE Transactions on Power Electronics.

[5]  Juan Carlos Balda,et al.  New power electronic interface combining DC transmission, a medium-frequency bus and an AC-AC converter to integrate deep-sea facilities with the AC grid , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[6]  Juan Carlos Balda,et al.  Novel nonlinear control of Dual Active Bridge using simplified converter model , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[7]  Hideaki Fujita,et al.  Dynamic control and performance of an isolated dual-active-bridge DC–DC converter , 2015, 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia).

[8]  Roderick J. Garcia Montoya,et al.  An evaluation of selected solid-state transformer topologies for electric distribution systems , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).

[9]  Kai Zhang,et al.  Large- and Small-Signal Average-Value Modeling of Dual-Active-Bridge DC–DC Converter Considering Power Losses , 2017, IEEE Transactions on Power Electronics.

[10]  Jinjun Liu,et al.  Control and Experiment of an H-Bridge-Based Three-Phase Three-Stage Modular Power Electronic Transformer , 2016, IEEE Transactions on Power Electronics.

[11]  Kenji Fukuda,et al.  Development of Ultrahigh-Voltage SiC Devices , 2015, IEEE Transactions on Electron Devices.

[12]  Alex Q. Huang,et al.  Solid State Transformer (SST) as an energy router: Economic dispatch based energy routing strategy , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[13]  J. W. Kolar,et al.  Medium frequency transformers for solid-state-transformer applications — Design and experimental verification , 2013, 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS).

[14]  Kenny George,et al.  Design and Control of a Bidirectional Dual Active Bridge DC-DC Converter to Interface Solar, Battery Storage, and Grid-Tied Inverters , 2015 .

[15]  D. G. Holmes,et al.  Adaptive dynamic control of a bi-directional DC-DC converter , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[16]  J.W. Kolar,et al.  Accurate Small-Signal Model for the Digital Control of an Automotive Bidirectional Dual Active Bridge , 2009, IEEE Transactions on Power Electronics.

[17]  Javier Sebastian,et al.  Different purpose design strategies and techniques to improve the performance of a Dual Active Bridge with phase-shift control , 2014, COMPEL 2014.

[18]  D Segaran,et al.  Dynamic modelling and control of dual active bridge bi-directional DC-DC converters for smart grid applications , 2013 .

[19]  Jonathan W. Kimball,et al.  Ac-ac dual active bridge converter for solid state transformer , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[20]  Jonathan W. Kimball,et al.  Solid-State Transformer Architecture Using AC–AC Dual-Active-Bridge Converter , 2013, IEEE Transactions on Industrial Electronics.

[21]  Fei Wang,et al.  Design and Demonstration of a 3.6-kV–120-V/10-kVA Solid-State Transformer for Smart Grid Application , 2014, IEEE Transactions on Power Electronics.

[22]  D. Menniti,et al.  A laboratory model of a dual active bridge DC-DC converter for a smart user network , 2015, 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC).

[23]  Hengsi Qin,et al.  Generalized Average Modeling of Dual Active Bridge DC–DC Converter , 2012, IEEE Transactions on Power Electronics.