Bidirectional control of a dual active bridge DC–DC converter for aerospace applications

Naayagi, R. T.; Forsyth, A.J.; Shuttleworth, R.

doi:10.1049/iet-pel.2011.0278

Cited by 84 publications

(47 citation statements)

References 21 publications

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“…Furthermore, the extremely high voltage change rate dv/dt may cause destructive damage to the transformer or inductor which has considerable interturn capacitance in HVDC applications. The dual active bridge (DAB) dc/dc converter [9]− [11] allows bidirectional power conversion and incorporates inherent soft-switching feature, which can be applied in HVDC grids potentially. However, just like the isolated versions of the basic dc/dc converters, the DAB will also encounter the problems of voltage unbalance among the series-connected power switches and very high dv/dt acting on the transformer.…”

Section: Introductionmentioning

confidence: 99%

Soft-Switching Operation of Isolated Modular DC/DC Converters for Application in HVDC Grids

Xing

Ruan

You

et al. 2016

IEEE Trans. Power Electron.

114

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High-voltage dc/dc converters play an important role in HVDC grids. Isolated modular dc/dc converters (IMDCCs) based on modular multilevel converter (MMC) technology provide a good solution to high-voltage applications. In order to reduce the size of the system, the IMDCC is required to be operated with a high ac link frequency, but this will lead to increased switching loss and thus degraded efficiency. This paper proposes a soft-switching operation scheme for such an IMDCC. In this scheme, a quasi-square-wave (QSW) modulation method is employed, where the chain-links generate quasi-square terminal voltages with reduced dv/dt. With such chain-link terminal voltages, the arm currents which provide good condition for the soft-switching operation of the QSW-IMDCC can be obtained. Since soft-switching can be achieved for the power switches, the proposed scheme will suffer less switching loss, thus improving the efficiency of the converter. Moreover, a capacitor voltage balancing control strategy is proposed. This strategy does not need any arm current sensors, thus reducing the cost. The proposed soft-switching operation scheme and capacitor voltage balancing control strategy are verified by the simulation results.

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Section: Introductionmentioning

confidence: 99%

Soft-Switching Operation of Isolated Modular DC/DC Converters for Application in HVDC Grids

Xing

Ruan

You

et al. 2016

IEEE Trans. Power Electron.

114

View full text Add to dashboard Cite

show abstract

“…The dual active bridge (DAB) converter has been widely used in HVDC and MVDC grids [1], DC distributed power system [2], solid-state transformer [3,4], automotive [5], and aerospace applications [6] since it shows advantages of bidirectional power transfer, compact design, easy implementation, and inherent soft switching feature [7][8][9]. Usually the modulation strategy adopted is the conventional phase shift (CPS) control, where the phase shift determines directly both the power flow direction and the amplitude of the delivery power.…”

Section: Introductionmentioning

confidence: 99%

Minimize Reactive Power Losses of Dual Active Bridge Converters using Unified Dual Phase Shift Control

Wen¹,

Su²

2017

Journal of Electrical Engineering and Technology

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-This paper proposed an unified dual-phase-shift (UDPS) control for dual active bridge (DAB) converters in order to improve efficiency for a wide output power range. Different operating modes of UDPS are characterized with respect to the reactive current distribution. The proposed UDPS has the same output power capability with conventional phase-shift (CPS) method. Furthermore, its implementation is simple since only the change of the leading phase-shift direction is required for different operating power range. The proposed UDPS control can minimize both the inductor rms current and the circulating reactive current for various voltage conversion ratios and load conditions. The optimal phase-shift pairs for two bridges of DAB converter are derived with respect to the comprehensive reactive power loss model, including the reactive components delivered from the load and back to the source. Simulation and experimental results are illustrated and explained with details. The effectiveness of the proposed method is verified in terms of reactive power losses minimization and efficiency improvement.

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“…Dual active bridge (DAB) dc-dc converters, first proposed in [3] for an industrial application, classically employ two Hbridges or three-phase bridges connected via an ac transformer, in what is termed a front-to-front connection [4][5][6][7][8][9][10][11]. Bidirectional power flow is possible and can be controlled by the voltage across the transformer leakage inductance.…”

Section: Introductionmentioning

confidence: 99%

The transition arm multilevel converter — A concept for medium and high voltage DC-DC transformers

Gowaid

Adam

Williams

et al. 2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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This paper proposes a dc/ac converter topology where each phase leg comprises a conventional series switch valve in one arm and a series connection of half-bridge chopper cells in the other arm. Operation with trapezoidal modulation is analyzed where the half-bridge modules have a reduced footprint and silicon area compared to standard modular multilevel converter modules. Furthermore, no arm inductance is required. The utilization of the proposed converter topology in medium and high voltage front-to-front dc-dc converter topologies is analyzed. Simulations investigate key features of the converter in comparison to other published topologies.Keywords -Modular multilevel converter, dc transformer, dual active bridge, dc/dc power conversion

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Bidirectional control of a dual active bridge DC–DC converter for aerospace applications

Cited by 84 publications

References 21 publications

Soft-Switching Operation of Isolated Modular DC/DC Converters for Application in HVDC Grids

Soft-Switching Operation of Isolated Modular DC/DC Converters for Application in HVDC Grids

Minimize Reactive Power Losses of Dual Active Bridge Converters using Unified Dual Phase Shift Control

The transition arm multilevel converter — A concept for medium and high voltage DC-DC transformers

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