Review of Dual-Active-Bridge Converters With Topological Modifications

Li, Liting; Xu, Guo; Sha, Deshang; Liu, Yonglu; Sun, Yang; Su, Mei

doi:10.1109/tpel.2023.3258418

Cited by 22 publications

(6 citation statements)

References 330 publications

(455 reference statements)

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“…The typical operational lifetime ranges from 10 to 20 years or more in industrial applications [120]. As depicted in Figure 7, the basic design of a DAB converter includes two full-bridge converters, power MOSFETs labeled S 1 through S 8 , a transformer's leakage L, which may also incorporate an additional external inductor, and a HF transformer with a turn ratio denoted by n [121][122][123]. The DAB converter obtains a fixed input voltage from the MVDC bus, which is presented by V bus in Figure 7, and the output current I thrust is used to drive the electric thruster.…”

Section: Ude For Dab Converter For Electric Thrustermentioning

confidence: 99%

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Spacecraft Medium Voltage Direct-Current (MVDC) Power and Propulsion System

Talebzadeh,

Beik

2024

Electronics

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This paper introduces a medium voltage direct-current (MVDC) system for large spacecraft megawatt-scale (MW) power and propulsion systems intended for interplanetary transport, including missions to the Moon and Mars. The proposed MVDC system includes: (i) A nuclear electric propulsion (NEP) that powers a permanent magnet (PM) generator whose output is rectified and connected to the MVDC bus. (ii) A solar photovoltaic (PV) source that is interfaced to the MVDC bus using a unidirectional boost DC-DC converter. (iii) A backup battery energy storage system (BESS) that connects to the MVDC bus using a bidirectional DC-DC boost converter. (iv) A dual active bridge (DAB) converter that controls the power to the spacecraft’s electric thruster. The NEP serves as the main power source for the spacecraft’s electric thruster, while the solar PV and BESS are intended to provide power for the payload and spacecraft’s low-voltage power system. The paper will (i) provide a review of the spacecraft MVDC power and prolusion system highlighting state-of-the-art main components, (ii) address the control of boost converters for the PV and BESS sources and the DAB converter for the thruster, and (iii) propose an uncertainty and disturbance estimator (UDE) concept based on current control algorithms to mitigate MVDC instability due to unpredictable factors and external disruptions. The proposed UDE can actively estimate and compensate for the system disturbance and uncertainty in real time, and thus, both the system tracking performance and robustness can be improved. Simulation studies have been conducted to substantiate the efficacy of the proposed schemes.

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Section: Ude For Dab Converter For Electric Thrustermentioning

confidence: 99%

“…Figure 8 shows the gate signal S1-S8, transformer voltages V1 (input) and V2 (output), and the transformer current (IL) under the phase-shift control. In the phaseshift control, the duty cycle of all switches is fixed as 50% [122]. A phase-shift angle D is…”

Section: Ude For Dab Converter For Electric Thrustermentioning

confidence: 99%

Spacecraft Medium Voltage Direct-Current (MVDC) Power and Propulsion System

Talebzadeh,

Beik

2024

Electronics

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“…The increasing need for standard (two-level) and multilevel power dc-dc converters with galvanic isolation highlights the importance of precise TR models in various applications, such as renewable energy systems, telecommunications infrastructure, data centers, electric vehicle charging networks, battery energy storage systems, microgrids, and power distribution networks [13]. The integration of TRs within dc-dc converters, such as dualactive-bridge converters (DABs) and solid-state transformers (SSTs), highlights their versatile utility and prominence in modern power electronics [7], [12].…”

Section: Introductionmentioning

confidence: 99%

“…In applications that use DABs or SSTs, it is undeniable that control systems must regulate voltage or current output [7], [12], [16]- [18]. However, synthesizing control systems for such applications is inherently challenging due to the nonlinear nature of these systems.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a Single-Phase Linear Multi-Winding Transformer in the d-q Frame

Campos-Salazar,

Viani-Abad,

Sandoval-García

2024

Preprint

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Exploring the fundamental principles of system modeling in electrical engineering, this study delves into the transformative power of the d-q transformation, highlighting its pivotal role in rendering time-varying systems into a coherent steady-state representation. Departing from conventional approaches, the study carefully navigates the complexities of single-phase transformer configurations, utilizing the Clarke and Park transformations to seamlessly transition between electrical coordinates and the d-q frame. Through extensive derivations, dynamic equations are formulated in both α-β and d-q coordinates, providing a detailed understanding of system dynamics under specific loads. In addition, the study extends the analysis to a generalized multi-winding transformer model that accommodates a wide range of transformer setups. With detailed mathematical derivations, insightful visual aids, and clear state-space representations, this work attempt to be a resource for researchers, engineers, and practitioners seeking to unravel the intricacies of electrical system modeling and analysis.

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“…To deal with this issue, some snubber circuits have been proposed to suppress voltage spikes [12][13][14][15], which can reduce the voltage spikes during the connection of the dc-link inductor and the leakage inductor. Furthermore, some snubber-less schemes are presented in [16][17][18][19] based on all-active-switch topology, which cannot be used in the current-fed full-bridge DC-DC converter. Moreover, in unidirectional applications such as photovoltaic generation and fuel cell systems, the all-active-switch topology is redundant and inevitably increases the complexity and cost of power converters.…”

Section: Introductionmentioning

confidence: 99%

A Hardware-Simplified Soft-Start Scheme for Current-Fed Full-Bridge DC-DC Converter

Li,

Meng

et al. 2023

Electronics

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At present, the current-fed full-bridge DC-DC converter still faces two inherent defects, namely, the soft-start issue during the start-up process and the voltage spike issue in normal working conditions. In existing research, a large number of attempts have been reported to overcome these two inherent issues. However, the existing solutions are all based on both redundant soft-start circuits and snubber circuits, and two different circuits are required. As a result, the cost of the current-fed full-bridge DC-DC converter is high, especially because the soft-start circuits are only used during the start-up process. So, to reduce device redundancy, a hardware-simplified soft-start scheme is proposed in this paper. In the proposed scheme, the snubber circuit is reused for the soft-start process based on topology reconfiguration, avoiding additional soft-start circuits to reduce the cost of this DC-DC converter. In this proposed method, the current-fed full-bridge DC-DC converter is operated as the voltage-fed full-bridge DC-DC converter by always turning on the snubber switch during the start-up process. Then, the output capacitor can be charged by slowly increasing the output voltage of the H bridge. Then, when the output voltage is high enough, the current-fed full-bridge DC-DC converter is again operated in the current-fed mode to boost the voltage. Subsequently, the converter characters and control strategy were examined and analyzed. The experimental results verify the feasibility of the proposed hardware-simplified soft-start scheme for the current-fed full-bridge DC-DC converter.

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Review of Dual-Active-Bridge Converters With Topological Modifications

Abstract: He has authored more than 100 papers and four books. His current research interests include the modeling and control of power converters, high-efficiency power conversion and power electronics applications in renewable energy power generation.

Cited by 22 publications

References 330 publications

Spacecraft Medium Voltage Direct-Current (MVDC) Power and Propulsion System

Spacecraft Medium Voltage Direct-Current (MVDC) Power and Propulsion System

Modeling and Simulation of a Single-Phase Linear Multi-Winding Transformer in the d-q Frame

A Hardware-Simplified Soft-Start Scheme for Current-Fed Full-Bridge DC-DC Converter

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