An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids

Lee, Youngsil; Vakil, Gaurang; Watson, Alan J.; Wheeler, Patrick

doi:10.1109/peci.2017.7935740

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Compared to the medium-voltage alternating current (MVAC) system, the MVDC system shown in Figure 1 reduces cable weight, avoiding voltage dip problems at many points and easily parallels generators [1][2][3][4][5][6][7][8]. Moreover, most equipment in use employs DC; therefore, conversion stage losses will be reduced, and as a result the economy and efficiency could be improved [9].…”

Section: Introductionmentioning

confidence: 99%

Disturbance Rejection and Control Design of MVDC Converter with Evaluation of Power Loss and Efficiency Comparison of SiC and Si Based Power Devices

et al. 2020

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With direct current (DC) power generation from renewable sources, as well as the current relocation of loads from alternating current (AC) to DC, medium-voltage DC (MVDC) should fill gaps in the areas of distribution and transmission, thereby improving energy efficiency. The MVDC system is a platform that interconnects electric power generation renewables (solar, wind) with loads such as data centers, industrial facilities and electric vehicle (EV) charging stations (also using MVDC technology). DC–DC power converters are part of the rising technology for interconnecting future DC grids, providing good controllability, reliability and bi-directional power flow. The contribution of this work is a novel and efficient multi-port DC–DC converter topology having interconnections between two converters, three-level neutral point clamping (NPC) on the high-voltage (HV) side and two converters on the low-voltage (LV) side, providing two nominal low voltages of 400 V (constant) and 500 V (variable), respectively. The design of this new and effective control strategy on the LV side has taken into condition load disturbances, fluctuations and voltage dips. A double-closed-loop control topology is suggested, where an outside voltage control loop (in which the capacitance energies are analyzed as variable, and the inside current loop is decoupled without the precise value of boost inductance) is used. The simulation results show the effectiveness of the proposed control system. In the second part of this study, wide-bandgap SiC and Si devices are compared by using comprehensive mathematical modeling and LT-spice software. Improving power loss efficiency and overall cost comparisons are also discussed.

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Section: Introductionmentioning

confidence: 99%

Disturbance Rejection and Control Design of MVDC Converter with Evaluation of Power Loss and Efficiency Comparison of SiC and Si Based Power Devices

et al. 2020

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“…In [15], the basic principle and an analytical modelling of the 3DAB converter for MVDC applications has been presented. The models have been used to derive an estimation method for RMS current values for the 3DAB converter.…”

Section: Introductionmentioning

confidence: 99%

Design considerations for a high-power dual active bridge DC-DC converter with galvanically isolated transformer

Lee

Watson

Vakil

et al. 2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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Multi-megawatt scale isolated DC-DC converters are likely to become increasingly popular as means to interconnect the MVDC grids of different voltage levels. Threephase dual active bridge DC-DC (3DAB) converters operating with the zero-voltage switching (ZVS) is a promising candidate for the target multi-megawatt application. This paper presents a systematic approach of the design considerations for a 3DAB converter. Firstly, the use of snubber capacitors in medium voltage and medium frequency operating conditions is proposed. Snubber capacitor influence on turn-off current levels and ZVS operating range are introduced and analyzed. In addition, details of thermal management design are introduced. It is established through power loss analysis that the proposed design method reduces the semiconductor losses substantially at full load conditions. Finally, the proposed method has been validated from a 10kW simulation model using PLECS software package.

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Electric Energy Router Loss Modeling Method Based on Port Loss Model for Operation States

Liu

Zheng

Gui

2021

2021 IEEE Sustainable Power and Energy Conference (iSPEC)

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An analytical modeling and estimating losses of power semiconductors in a three-phase dual active bridge converter for MVDC grids

Cited by 5 publications

References 5 publications

Disturbance Rejection and Control Design of MVDC Converter with Evaluation of Power Loss and Efficiency Comparison of SiC and Si Based Power Devices

Disturbance Rejection and Control Design of MVDC Converter with Evaluation of Power Loss and Efficiency Comparison of SiC and Si Based Power Devices

Design considerations for a high-power dual active bridge DC-DC converter with galvanically isolated transformer

Electric Energy Router Loss Modeling Method Based on Port Loss Model for Operation States

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