Evolution of Power Converter Topologies and Technical Considerations of Power Electronic Transformer-Based Rolling Stock Architectures

Ronanki, Deepak; Williamson, Sheldon S.

doi:10.1109/tte.2017.2765518

Cited by 72 publications

(49 citation statements)

References 54 publications

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“…The existing 50 kW chargers deliver with approximately 93% efficiency with a LF transformer efficiency of 98.5%. A promising approach to overcome the above issues is the utilization of solid state transformer (SST) [52] technology, which is already popular for railway traction [53] and DC distribution grids [54].…”

Section: Sst-based Xfc Infrastructurementioning

confidence: 99%

“…In order to directly connect SST-based AFE converter to the MV grid (6.6-15 kV) and have the ability to operate at high switching frequency, there needs to be exploration of wide-bandgap (WBG) devices such as SiCs and GaNs. The physical properties of WBG devices in comparison to Si-based devices are shown in Figure 10 [53,62,63]. The SiC devices are the preferred option for SST based systems as it can operate at higher switching frequency and operating temperature.…”

Section: Wide Bandgap Devicesmentioning

confidence: 99%

“…These features significantly minimizes volume, size, weight of heat sink and magnetics size [62,63]. 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].…”

Section: Wide Bandgap Devicesmentioning

confidence: 99%

“…The high frequency transformer (HFTR) in the SST power stage allows for operation at higher switching frequency (>400 Hz to several kHz), which makes the energy conversion more efficient with higher power density. Furthermore, it reduces the voltage and current harmonic distortion due to core saturation of LF transformers [53]. However, there are some special design considerations that must be employed while designing the HFTR.…”

Section: Advances In Magneticsmentioning

confidence: 99%

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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: Sst-based Xfc Infrastructurementioning

confidence: 99%

Section: Wide Bandgap Devicesmentioning

confidence: 99%

Section: Wide Bandgap Devicesmentioning

confidence: 99%

Section: Advances In Magneticsmentioning

confidence: 99%

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Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

2019

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“…This Line frequency transformers (LFTs) in railway vehicles are molded to operate for minimum power density (0.25-0.35 kVA/kg) with an efficiency around 94% for high voltage overhead systems. Railway consider the size, weight, and efficiency constraints in an optimized fashion with traction equipment [9]. The better use of new insulation materials, synthetic ester oil as dielectric, design of windings, and coolants may not suitable to fully address the issues.…”

Section: Introductionmentioning

confidence: 99%

Power Electronic Transformer based IGBT Converters for Electric Locomotive Applications

Paul*,

Ravichandran

2019

IJITEE

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Electric locomotives up gradation is one of fastest growing technology on railway research. Modern locomotive traction drives operate for high speed rail networks. This paper proposes locomotive drives directly from the mains without line frequency locomotive transformer. Power electronic transformers (PETs) offer the advantage of the reduction in size and weight compared to conventional line frequency transformers. In this article discussed about high power converter using IGBT with high-frequency transformer for electric locomotives is utilized for the power converter side. The catenary feeding front end of the locomotive is connected directly to IGBT based cascade H bridge converter and conventional IGBT based three phase inverter act as load end converter for driving induction motor. The MATLAB simulation results of PET based high frequency transformer with IGBT power converter integrated with traction inverter has justified .

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Comparative analysis of 3D‐SVM and 4D‐SVM for five ‐phase voltage source inverter

Palanisamy

Balasubramanian

Mahammad³

2021

Int Trans Electr Energ Syst

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Pulse width modulation (PWM) methods play a major role to control the various power electronic converters to progress the recital of the system. In this paper, a comparative analysis is done for three dimensional space vector modulation (3D-SVM) and four dimensional space vector modulation (4D-SVM) for five-phase voltage source inverter. 3D-SVM method comprises all qualities of conventional SVM; switching time calculation is simple and much suitable for three-phase system; where in five-phase system, it has redundant switching state vectors. 4D-SVM includes advantages of 3D-SVM and other conventional methods, it employs only nonredundant switching state vectors; it directs to diminish the intricacy in switching time calculations and avoids trigonometric calculations and look up tables for reference vector identification. The various parameters such as total harmonic distortion, improved output voltage, minimized common mode voltage and switching time calculation are analyzed and compared for 3D-SVM and 4D-SVM techniques. Simulation and hardware results are acquired and established using matlab simulink and FPGA processor, respectively.

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Evolution of Power Converter Topologies and Technical Considerations of Power Electronic Transformer-Based Rolling Stock Architectures

Cited by 72 publications

References 54 publications

Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation

Power Electronic Transformer based IGBT Converters for Electric Locomotive Applications

Comparative analysis of 3D‐SVM and 4D‐SVM for five ‐phase voltage source inverter

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