A Modular SiC High-Frequency Solid-State Transformer for Medium-Voltage Applications: Design, Implementation, and Testing

Dong, Dong; Agamy, Mohammed; Bebic, J.; Chen, Qin; Mandrusiak, Gary

doi:10.1109/jestpe.2019.2896046

Cited by 111 publications

(23 citation statements)

References 22 publications

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“…Incorporating the leakage inductance in the resonant tanks can be beneficial in reducing losses [62]. The authors in [63] propose a CLLC resonant DAB converter with lower switching losses and better capability of transformer power delivery.…”

Section: A Dual Active Bridgementioning

confidence: 99%

“…Employing the resonance tank is favourable for stepping up the voltage together with soft switching at higher power level [4], [64]. Nevertheless, the series resonant DAB converters have some drawbacks which are the extra components resulting in large size, high-cost [60], and high amount of turning OFF losses at constant frequency [62], [63].…”

Section: A Dual Active Bridgementioning

confidence: 99%

See 1 more Smart Citation

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

105

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MVDC technology is a promising solution to avoid installation of new AC networks. MVDC can provide optimum integration of large-scale renewable energy sources, the interconnection of different voltage levels of DC and AC grids with the ancillary services. The development in MVDC depends significantly on the DC-DC converters. Such converters support the modern trends of utilising medium-frequency transformers in power networks. Research on isolated converters technology is in its infancy and limited by the conversion ratio and component ratings. Besides, there is no standards exist covering specific aspects of isolated converter product. Thus, a review of such converters is needed. This work presents, for the first time, a review of the DC-DC power converter families in MVDC grids including the leading families which are isolated and nonisolated converters, as well as other subfamilies comparing the specifications and characteristics. Also, the applications of these converters are provided by focusing on the essential requirements for each application. Index Terms-MVDC grids, DC-DC power converters, dual active bridge (DAB), multilevel converter. TABLE I RECOMMENDED CLASSES FOR MVDC VOLTAGE MVDC Class (kV) Nominal Rated Voltage (kV) Maximum Rated Voltage (kV)

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Section: A Dual Active Bridgementioning

confidence: 99%

Section: A Dual Active Bridgementioning

confidence: 99%

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

105

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“…2. The high blocking voltages enable increasing V cell and, therefore, for a given V acHV , the number of stacked PET modules can be reduced (see Figure 1) [7,17]. This is also advantageous for the HFT.…”

Section: Benefits and Practical Limitations Of Using Sic Mosfets For mentioning

confidence: 99%

“…Several examples of using SiC devices in different PET topologies exist in literature [7][8][9][10][11][12][13]. In the majority of applications, 1.2/1.7 kV commercial SiC MOSFETs are used for LV side devices, while for HV side, 10 kV non-commercial MOSFETs are used [6,8].…”

Section: Introductionmentioning

confidence: 99%

SiC-Based High Efficiency High Isolation Dual Active Bridge Converter for a Power Electronic Transformer

et al. 2020

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This paper discusses the benefits of using silicon carbide (SiC) devices in a three-stage modular power electronic transformer. According to the requirements to be fulfilled by each stage, the second one (the DC/DC isolation converter) presents the most estimable improvements to be gained from the use of SiC devices. Therefore, this paper is focused on this second stage, implemented with a SiC-based dual active bridge. Selection of the SiC devices is detailed tackling the efficiency improvement which can be obtained when they are co-packed with SiC antiparallel Schottky diodes in addition to their intrinsic body diode. This efficiency improvement is dependent on the dual active bridge operation point. Hence, a simple device loss model is presented to assess the efficiency improvement and understand the reasons for this dependence. Experimental results from a 5-kW Dual Active Bridge prototype have been obtained to validate the model. The dual active bridge converter is also tested as part of the full PET module operating at rated power.

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“…To supply a 400-V dc load, the n 1 : n 2 = 2 : 3 is applied to the HF transformer; the M 1 = 0.8 and M 2 = 0.75 are performed to the inversion and conversion-stage modulation indexes, respectively, according to (8). The dc load is at R L = 40 .…”

Section: B 400 V Dc Loadmentioning

confidence: 99%

A Simple Space Vector Modulation of High-Frequency AC Linked Three-Phase-to-Single-Phase/DC Converter

Liu

et al. 2020

IEEE Access

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High frequency (HF) ac linked converter functions well to interface between buses with different voltage types. Using a three-phase-to-single-phase matrix converter, a single-phase cyclo converter, and a HF transformer, we can compose a HF ac linked converter to interface between three-phase ac grids and single-phase ac or dc distributed generations (DGs). In this paper, a novel space vector modulation (SVM) method is proposed for such kind of converter. The proposed SVM method converts the mains three-phase ac voltage to a HF ac voltage at the primary side of transformer, and then unfolds the HF ac voltage to a single-phase ac or dc voltage at the secondary side of transformer. Without need to compute separate switching signals for the primary and secondary converters and then coordinate their operations elaborately, the proposed SVM method can be easily implemented by incorporating the HF chopping into the SVM of traditional indirect matrix converter. Therefore, no complicated duty cycle computation or elaborate switching states combination is required. Simulation and hardware-in-loop implementation demonstrate the validity of the proposed method. INDEX TERMS High-frequency ac, matrix converter, space vector modulation, distributed generations.

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A Modular SiC High-Frequency Solid-State Transformer for Medium-Voltage Applications: Design, Implementation, and Testing

Cited by 111 publications

References 22 publications

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

SiC-Based High Efficiency High Isolation Dual Active Bridge Converter for a Power Electronic Transformer

A Simple Space Vector Modulation of High-Frequency AC Linked Three-Phase-to-Single-Phase/DC Converter

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