Forward Dual-Active-Bridge Solid-State Transformer for a SiC-Based Cascaded Multilevel Converter Cell in Solar Applications

Parreiras, Thiago M.; Machado, Alysson Augusto Pereira; Amaral, Fernando; Lobato, Gideon C.; Brito, José A. S.; Filho, Braz Cardoso

doi:10.1109/tia.2018.2854674

Cited by 39 publications

(18 citation statements)

References 17 publications

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“…Figure 17 shows the PV voltage ripple ∆V PV obtained with different δ and C L values using expression (38). Such a simulation confirms that ∆V PV grows when δ rises as predicted in (39). Moreover, the simulation confirms that ∆V PV decreases when C L is increased, which is evident from (38).…”

Section: Verification Of the L Lk Design Equationsupporting

confidence: 65%

“…Moreover, the DAB converter could provide a high voltage-conversion ratio based on the transformer turns ratio, and soft switching is achievable to reduce voltage and current stress on the switching devices, providing also high power density due to the use of a high-frequency transformer (HFT) [23,[31][32][33]. In the literature, the DAB converter has been used in battery energy storage systems (BESS) [34][35][36], solid-state transformers [37][38][39] and fuel cell applications [40]. Concerning PV systems, the DAB converter has been used in [39,[41][42][43][44][45][46][47][48] to interface PV arrays in series connection, but the high voltage-conversion ratio capability has not been exploited in those works.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, the DAB converter has been used in battery energy storage systems (BESS) [34][35][36], solid-state transformers [37][38][39] and fuel cell applications [40]. Concerning PV systems, the DAB converter has been used in [39,[41][42][43][44][45][46][47][48] to interface PV arrays in series connection, but the high voltage-conversion ratio capability has not been exploited in those works. Moreover, although many design considerations have been provided for the DAB converter [32,40,49], there is not reported a design method for a PV system based on the DAB converter.…”

Section: Introductionmentioning

confidence: 99%

“…That work presents modeling and control design procedures aimed at regulating the output voltage, but the converter design for the PV applications is not addressed. The work reported in [39] presents a modified version of the DAB converter for PV applications, focusing on a control design to regulate the DC bus voltage. In that work it is considered an additional boost converter connected between the PV source and the DAB converter which is used to perform the MPPT operation over the PV module, which introduces additional costs and complexity.…”

Section: Introductionmentioning

confidence: 99%

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Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

et al. 2020

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In this paper, a design method for a photovoltaic system based on a dual active bridge converter and a photovoltaic module is proposed. The method is supported by analytical results and theoretical predictions, which are confirmed with circuital simulations. The analytical development, the theoretical predictions, and the validation through circuital simulations, are the main contributions of the paper. The dual active bridge converter is selected due to its high efficiency, high input and output voltages range, and high voltage-conversion ratio, which enables the interface of low-voltage photovoltaic modules with a high-voltage dc bus, such as the input of a micro-inverter. To propose the design method, the circuital analysis of the dual active bridge converter is performed to describe the general waveforms derived from the circuit behavior. Then, the analysis of the dual active bridge converter, interacting with a photovoltaic module driven by a maximum power point tracking algorithm, is used to establish the mathematical expressions for the leakage inductor current, the photovoltaic current, and the range of operation for the phase shift. The design method also provides analytical equations for both the high-frequency transformer equivalent leakage inductor and the photovoltaic side capacitor. The design method is validated through detailed circuital simulations of the whole photovoltaic system, which confirm that the maximum power of the photovoltaic module can be extracted with a correct design of the dual active bridge converter. Also, the theoretical restrictions of the photovoltaic system, such as the photovoltaic voltage and power ripples, are fulfilled with errors lower than 2% with respect to the circuital simulations. Finally, the simulation results also demonstrate that the maximum power point for different environmental conditions is reached, optimizing the phase shift factor with a maximum power point tracking algorithm.

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Section: Verification Of the L Lk Design Equationsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

et al. 2020

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“…For the NSDAB dc-dc converter, the power losses mainly contain switching losses and conduction losses in switching devices, copper losses in transformer and auxiliary inductor, and core losses in auxiliary inductor [18], [26], [29], [59]. When wide-bandgap semiconductors, such as SiC-based switches [6], [60], [61] and GaN-based switches, are applied [53], [62], [63], the switching losses of the NSDAB dc-dc converter can be reduced significantly. In addition, the efficiency of the NSDAB dc-dc converter can also be improved by using efficiencyoptimization strategies.…”

Section: Overview Of Efficiency Improving Schemesmentioning

confidence: 99%

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Hou

2020

IEEE Trans. Power Electron.

377

119

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The nonresonant single-phase dual-active-bridge (NSDAB) dc-dc converter has been increasingly adopted for isolated dc-dc power conversion systems. Over the past few years, significant research has been carried out to address the technical challenges associated with modulations and controls of the NSDAB dc-dc converter. The aim of this paper is to review and compare these recent state-of-the-art modulation and control strategies. First, the modulation strategies for the NSDAB dc-dc converter are analyzed. All possible phase-shift patterns are demonstrated, and the correlation analysis of the typical phases-shift modulation methods for the NSDAB dc-dc converter is presented. Then, an overview of steady-state efficiency-optimization strategies is discussed for the NSDAB dc-dc converter. Moreover, a review of optimized techniques for dynamic responses is also provided. For both the efficiency and dynamic optimizations, thorough comparisons and recommendations are provided in this paper. Finally, to improve both steady-state and transient performances, a combination approach to optimize both the efficiency and dynamics for an NSDAB dc-dc converter based on the reviewed methods is presented in this paper. Index Terms-Current feedback control, current stress, dualactive-bridge (DAB) converter, dynamic performances, efficiency, observer-based control, power control, power losses, reactive power. NOMENCLATURENSDAB Nonresonant single-phase dual-active-bridge. EV Electrical vehicle. SST Solid-state transformer. BTB Back-to-back. MMDCT Modular multilevel dc-link solid-state transformer. SPS Single-phase-shift. ZVS Zero-voltage-switching. DPS Dual-phase-shift. EPS Extended-phase-shift. TPS Triple-phase-shift.

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Review of wide band-gap technology: power device, gate driver, and converter design

et al. 2022

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Forward Dual-Active-Bridge Solid-State Transformer for a SiC-Based Cascaded Multilevel Converter Cell in Solar Applications

Cited by 39 publications

References 17 publications

Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Review of wide band-gap technology: power device, gate driver, and converter design

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