A preliminary loss comparison of solid-state transformers in a rail application Employing Silicon Carbide (SiC) MOSFET switches

Evans, Nathan; Lagier, Thomas; Pereira, A. S. N.

doi:10.1049/cp.2016.0196

Cited by 14 publications

(10 citation statements)

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“…Moreover, device utilization factor (>0.7) of SiC devices in comparison to Si-IGBT counterparts [53]. A preliminary comparison between SiC and Si-IGBT based SST designs are investigated in Reference [64]. A 1-MVA SST with SiC modules was developed in Reference [65], which has an efficiency of 98% with 70% reduction in weight.…”

Section: Wide Bandgap Devicesmentioning

confidence: 99%

Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

2019

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With the growing fleet of a new generation electric vehicles (EVs), it is essential to develop an adequate high power charging infrastructure that can mimic conventional gasoline fuel stations. Therefore, much research attention must be focused on the development of off-board DC fast chargers which can quickly replenish the charge in an EV battery. However, use of the service transformer in the existing fast charging architecture adds to the system cost, size and complicates the installation process while directly connected to medium-voltage (MV) line. With continual improvements in power electronics and magnetics, solid state transformer (SST) technology can be adopted to enhance power density and efficiency of the system. This paper aims to review the current state of the art architectures and challenges of fast charging infrastructure using SST technology while directly connected to the MV line. Finally, this paper discusses technical considerations, challenges and introduces future research possibilities.

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Section: Wide Bandgap Devicesmentioning

confidence: 99%

Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

2019

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“…Moreover, C cell size is not determined by the cell switching frequency. Therefore, SiC switching devices are not of special merit here, even when going to higher V cell (i.e., to reduce the number of stacked modules), still Si IGBT would be the selected option [14]. On the other hand, SiC free-wheeling antiparallel diodes are quite interesting in this case since the CHB full bridge is required to handle positive and negative currents (i.e., not only during the dead time).…”

Section: Device Requirements Per Pet Stagementioning

confidence: 99%

“…Additionally, going to higher PET module voltage is not achievable using Si devices, unless the switching frequency is reduced to few kHz. Regarding the antiparallel diode, the advantages of using SiC are still a controversial issue [14,28] and, therefore, will be analyzed in this work. 3P4L DC/AC: commutation requirements are not high (in the range of few kHz [29]), and since it interfaces the LVAC grid, high blocking voltages are not required.…”

Section: Device Requirements Per Pet Stagementioning

confidence: 99%

“…In some works, SiC was used in all the PET stages, such as in the TIPS (transformer-less intelligent power substation), which is an all-SiC three-stage PET topology [12]. In [14], a detailed comparison was carried out between two cases: (1) using 10 kV and 3.3 kV SiC MOSFETs and, (2) using 10 kV and 3.3 kV Si IGBTs, for different PET topologies. Authors concluded the importance of further research into the combined use of Si IGBT with SiC MOSFETs for three-stage PETs.…”

Section: Introductionmentioning

confidence: 99%

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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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“…Currently, different topologies of traction chains coexist on a railway network [1]. Thanks to the development of power electronics, new architectures including a medium frequency transformer, are studied to replace the step-down transformer and the input rectifier [2], [3]. These new topologies, are expected to reduce the volume and weight of the traction chain input stage, improve the efficiency and increase the availability.…”

Section: Introductionmentioning

confidence: 99%

25 kV–50 Hz railway supply modelling for medium frequencies (0–5 kHz)

Stackler

Morel

Ladoux

et al. 2016

2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles &Amp; Internationa

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In this paper, a modelling method of a 25 kV-50 Hz railway line, in a frequency range from 0 to 5 kHz, is presented. A model is proposed to quantify current and voltage harmonics generated by traction converters in different points of the network. An equivalent circuit, taking into account the skin effect for time-domain simulations, is also proposed. A new model, based on state space representation and transfer functions is developed to simplify the study of the interactions between several trains circulating on a line sector. As an example, the amplitudes of the harmonics generated by on-board active rectifiers are computed at several points of the network for a given topology of the overhead line and several positions of two trains on a sector with a junction.

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A preliminary loss comparison of solid-state transformers in a rail application Employing Silicon Carbide (SiC) MOSFET switches

Cited by 14 publications

References 0 publications

Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

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

25 kV–50 Hz railway supply modelling for medium frequencies (0–5 kHz)

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