Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer

Costa, Levy Ferreira; Buticchi, Giampaolo; Liserre, Marco

doi:10.1109/tpel.2018.2799680

Cited by 68 publications

(41 citation statements)

References 22 publications

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“…The SR converter presents a well-regulated output voltage for a wide range of load, avoiding the requirement of closeloop control and also reducing the number of sensors. For that reason, SR converter is also denominated DC transformer [1], [17], [18]. Its reactive network is composed by a resonant capacitor connected in series to a resonant inductor.…”

Section: B Classification Of Mtb Dc-dc Topologiesmentioning

confidence: 99%

“…Thus, as shown in Figure 11 (b), devices with lower R DS(on) can reduce the conduction losses and improve the performance of the AMTB topology. Therefore, an optimized design can be carried out to find the optimum architecture, number of cells, and power device, as presented in [17], [18]. Finally, hybrid/passive topologies can also be used to implement the cells for reducing the volume trough the elimination of inherent auxiliary circuits, cf.…”

Section: Design Considerations Of the Insulated Cellmentioning

confidence: 99%

“…Comparatively, from a system-level perspective, the MTTF of a system composed by multiple 2WT-based converters (MTTF syst,2WT ) can be easily obtained from (17). In that case, even when only one single cell fails, in fact, two cells are removed of the power flow, since the multiples DC-DC converter based on 2WT are not coupled magnetically among them.…”

Section: F Reliability and Availability Assessmentmentioning

confidence: 99%

“…To achieve the desired inductance ratio, extra inductances can be placed in the load ports. However, increasing this inductance in a MAB configuration might lead to higher circulating current [17]. Thus, there is a trade-off between the decoupled ports and total inductance, which can be achieved by some winding arrangements.…”

Section: B Unwanted Cross-coupling Effectsmentioning

confidence: 99%

See 3 more Smart Citations

A Comprehensive Assessment of Multiwinding Transformer-Based DC–DC Converters

Pereira

Hoffmann

Zhu

et al. 2021

IEEE Trans. Power Electron.

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Multiwinding-Transfomer-based (MTB) DC-DC converter did emerge in the last 25 years as an interesting possibility to connect several energy systems and/or to offer higher power density because of the reduction of transformer core material and reduction of power converter stages. MTB DC-DC converters can be considered as an interesting compromise between non-modular and a modular DC-DC converter since they are themselves modular in the construction. This eventually leads to some fault-tolerant possibilities since the multiwinding transformer (MWT) connects multiples ports and if one of them is not working anymore and it can be isolated, the others might still continue operating. Unfortunately, it is exactly the MWT that creates most of the technical challenges of this class of DC-DC converters because of the cross-coupling effects among the cells which make especially the resonant-topology very challenging to be designed. This paper reviews the history of the MTB DC-DC and then provides a classification of them, comparing them with Figure of Merits (FOM) and focusing on which is the maximum possible number of windings and which are the most suited magnetic core types. The problems coming from cross-coupling and the possible fault-tolerant operation are analysed with the help of simulation and experimental results.

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Section: B Classification Of Mtb Dc-dc Topologiesmentioning

confidence: 99%

Section: Design Considerations Of the Insulated Cellmentioning

confidence: 99%

Section: F Reliability and Availability Assessmentmentioning

confidence: 99%

Section: B Unwanted Cross-coupling Effectsmentioning

confidence: 99%

See 2 more Smart Citations

A Comprehensive Assessment of Multiwinding Transformer-Based DC–DC Converters

Pereira

Hoffmann

Zhu

et al. 2021

IEEE Trans. Power Electron.

Self Cite

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“…Engineering prototypes have been considered and implemented [18], at mean time played an important role in protecting and transforming the equipment itself [19]. In addition, the maximum output current of the converter is often limited on a fixed value form safety point of view [20], which is usually achieved by blocking the drive pulses of the self-shutdown devices such as IGBT [21], however, this is not enough. Transformer needs to achieve low voltage ridethrough function, the fault current can be controlled within a certain range.…”

Section: Introductionmentioning

confidence: 99%

Research on fault current limitation and active control for power electronic transformer in direct current grid

Zhuo

Zhang

et al. 2020

IET Generation Trans & Dist

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Due to the low impedance of DC (Direct Current) power transmission line, short‐circuit current has a very high increment speed, which causes problems as difficulty in current limitation method. This paper proposes a new method to realize the current‐limiting control of short‐circuit current by using active control of power electronic transformer. The method improves the topology of dual active bridge modules that contribute the DC transformer, and installs an IGBT (Insulated Gate Bipolar Transistor) switch in reverse direction on supporting capacitor branch of each module to control the capacitor on or off, which can guarantee the storage energy within the capacitor will not release in initial stage in case of DC short circuit fault happen. Therefore, there is no large inrush current flow out. Furthermore, combined with the requirements of current tracking control during low‐voltage ride‐through, the transformer output current under short‐circuit condition is actively controlled in order to meet the needs of renewable energy power generation equipment. Finally, the simulation and hardware‐in‐the‐loop experiments verify the correctness of this method.

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Design and optimization of 30 kW CLLLC resonant converter for vehicle‐to‐grid applications

Tian,

Tang,

Shi

2024

Circuit Theory & Apps

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The CLLLC resonant converter is a promising technology for electric vehicles and microgrids due to its ability to operate bidirectionally. This article presents a design of a bidirectional CLLLC resonant converter that is applied in the vehicle‐to‐grid (V2G). The battery side of the converter uses a two‐channel parallel structure to enhance its efficiency and reliability. In contrast, the DC‐bus side uses a transformer series structure to obtain the benefits of passive current sharing on the secondary side and reduce the transformer turns ratio. By utilizing the proposed design method, the converter can achieve a wide input and output voltage range, high efficiency, and high power density. The article analyzes the working principle of the converter and explains the design process, which includes the transformer turns ratio, magnetizing inductance, and resonance parameters. Finally, an experimental prototype is produced to verify the theory's validity and the design's feasibility. The prototype has a DC‐bus side voltage of 660–860 V, a battery side voltage of 250–500 V, and a maximum power output of 30 kW. The peak efficiency of the prototype is 98.2%, and its power density can reach up to 8 kW/L.

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Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer

Cited by 68 publications

References 22 publications

A Comprehensive Assessment of Multiwinding Transformer-Based DC–DC Converters

A Comprehensive Assessment of Multiwinding Transformer-Based DC–DC Converters

Research on fault current limitation and active control for power electronic transformer in direct current grid

Design and optimization of 30 kW CLLLC resonant converter for vehicle‐to‐grid applications

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