Switching Control Strategy to Minimize Dual Active Bridge Converter Losses

Oggier, Germán G.; García, Guillermo; Oliva, Alejandro

doi:10.1109/tpel.2009.2020902

Cited by 455 publications

(161 citation statements)

References 26 publications

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“…±280 V and ±(40.8÷61.2) V at its AC terminals (with the duty cycle being equal to 50%). The DAB converter allows the bi-directional flow of energy between the coupled circuits E1 and E2 by adjusting the time shift between the rectangular voltages u1 and u2 of the both bridges [20].…”

Section: N1 N2 -The Number Of Turns Of the High-voltage (Primary) Anmentioning

confidence: 99%

See 1 more Smart Citation

Analytical description of power losses in a transformer operating in the dual active bridge converter

Barlik

Nowak

Grzejszczak

et al. 2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The paper presents an analytical approach to the determination of power losses in a high-frequency transformer operating in the dual active bridge (DAB). This transformer, having two single-phase transistor bridge inverters, couples two DC circuits that significantly differ in voltages (280 V and 51 V ±20%). Power losses in the core and windings of the planar transformer 5600 VA /100 kHz were calculated taking into account changes in the value and direction of the energy flow between the coupled DC circuits. These circuits represent storage or renewable energy sources and intermediate circuits of the converters used in distributed generation systems. Calculations were performed using the Steinmetz's and Dowell's equations. The analytical results have been verified experimentally.Key words: core and windings losses, ferrite, planar transformer, Steinmetz's equation, Dowell's model, dual active bridge. determining the power losses in the core and windings of high frequency transformers. However, the results reported in these publications are obtained in an experimental way and confirmed using a complex analytical description, which is difficult to use in practice. In a number of publications (e.g. [11,[13][14][15]17]), attention is paid to the impact of the growth of the winding resistance for the harmonic current of the transformer, but with no reference to the operation in the DAB system. This paper presents the analytical determination of the power losses in the core and windings of the high-frequency transformer which operates in a dual active bridge. For the determination of these losses, the Steinmetz and Dowell models were used [18,19]. The results of the power losses calculations include the influence of the transformer temperature different relationships between the DC voltages and varying shift modulation ratios of the DAB converter. Analytical description of power losses in a transformerSection 2 presents an overview of a DAB system that includes the transformer being the main subject of this study. Section 3 provides a description of the construction of the transformer and its basic parameters. Sections 4 and 5 are devoted to the discussion of the analytical models used to determine the power loss, as well as the presentation of the results of calculations of the losses in the core and windings of the transformer under consideration. Section 6 provides the results of calculations of the total power loss and transformer energy efficiency with respect to the DAB system. In Section 7, the results obtained analytically and the results of experimental measurements are compared. Section 8 is a summary of the study, containing a brief assessment of the results and conclusions regarding the suitability of the proposed analytical description. The dual active bridge (DAB)Among different versions of dual active bridges, the most commonly presented in the literature are single-phase systems. They

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Section: N1 N2 -The Number Of Turns Of the High-voltage (Primary) Anmentioning

confidence: 99%

“…Based on resistance of the j-th winding section (Rac(j)) consisting of ms layers c following relationship (e.g. [19][20][21][22][23][24]):…”

Section: Windings Resistancesmentioning

confidence: 99%

Analytical description of power losses in a transformer operating in the dual active bridge converter

Barlik

Nowak

Grzejszczak

et al. 2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…Since the potential of DAB is the ability to get the converter to work in soft switching mode, the control methodology and the switching losses models proposed in [12] are used. The proposed control is to drive one of the two bridges to generate a three-level pulse-width modulated voltage waveform, with an appropriate phase shift δ respect to the waveform on the other side of the transformer.…”

Section: ) Analytical Models For Conduction Lossesmentioning

confidence: 99%

“…Moreover, redundant cells were added: an additional parallel DAB if the NPC converter is used in the MV side, while an additional parallel DAB in each phase if CHB converters are selected. According to [12], the transformation ratio was chosen in order to ensure the soft-switching operation in the whole phase shift range, considering m=1. The low voltage DC-link was selected to 650 V (15% above the natural DC-link voltage).…”

Section: B Analyzed Topologiesmentioning

confidence: 99%

Impact of the modularity on the efficiency of Smart Transformer solutions

Quartarone

Liserre

Fuchs

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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Abstract-Due to the possibility to drastically reduce the Solid State Transformer (SST) volume and weight, its use is becoming a reality in traction and wind power plant applications, while, in the electric distribution system, it is still considered futuristic. A SST, with managerial role in the electric distribution grid, is generally called Smart Transformer (ST). Unfortunately the low efficiency, the low reliability and the high cost still act as barriers for its widespread use in the real world. This paper focuses on the impact of a modular design, by benchmarking different ST topologies. Moreover, the paper provides guidelines on how to choose the semiconductor modules and assessments on how the choice affects the efficiency of the ST.

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“…Generally, the most common control methods for such a topology are conventional single-phase-shift (CSPS) control and dual-phase-shift (DPS) control [13][14][15][16][17][18][19][20][21][22]. In CSPS control, the gate signals of the corresponding switches in the primary and the secondary bridges are phase-shifted [5,13].…”

Section: Introductionmentioning

confidence: 99%

An Efficiency-Optimized Isolated Bidirectional DC-DC Converter with Extended Power Range for Energy Storage Systems in Microgrids

2012

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This paper proposes a novel extended-single-phase shift (ESPS) control strategy of isolated bidirectional full-bridge DC-DC converters (IBDCs) which are a promising alternative as a power electronic interface in microgrids with an additional function of galvanic isolation. Based on the mathematical models of ESPS control under steady-state conditions, detailed theoretical and experimental analyses of IBDC under ESPS control are presented. Compared with conventional single-phase-shift (CSPS) control, ESPS control can greatly improve the efficiency of IBDCs in microgrids through decreasing current stress and backflow power considerably over a wide input and output voltage range under light and medium loads. In addition, ESPS control only needs to adjust one single phase-shift angel to control transmission power, thus it retains implementation simplicity in comparison with dual-phase-shift (DPS) control for microgrid applications. Furthermore, an efficiency-optimized modulation scheme based on ESPS and CSPS control is developed in the whole power range of IBDC for power distribution in microgrids. A 10 kW IBDC prototype is constructed and the experimental results validate the effectiveness of the proposed control strategy, showing that the proposed strategy can enhance the overall efficiency up to 30%.

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Switching Control Strategy to Minimize Dual Active Bridge Converter Losses

Cited by 455 publications

References 26 publications

Analytical description of power losses in a transformer operating in the dual active bridge converter

Analytical description of power losses in a transformer operating in the dual active bridge converter

Impact of the modularity on the efficiency of Smart Transformer solutions

An Efficiency-Optimized Isolated Bidirectional DC-DC Converter with Extended Power Range for Energy Storage Systems in Microgrids

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