A Medium-Voltage Medium-Frequency Isolated DC–DC Converter Based on 15-kV SiC MOSFETs

Wang, Li; Zhu, Qianlai; Yu, Wensong; Huang, Alex Q.

doi:10.1109/jestpe.2016.2639381

Cited by 93 publications

(50 citation statements)

References 20 publications

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“…It has simple and symmetrical structure, easy to start up and to implement over current protection. With the 15 kV SiC MOSFETs, a 6 kV-400 V, 10 kW DHB DC-DC converter running at 20 kHz has been developed and reported [19]. The steady state waveforms at 6 kV/ 6.5 kW is shown in Fig.…”

Section: B Dc-dc Applicationsmentioning

confidence: 99%

“…13) that combines a DAB and a series resonant converter has been demonstrated by the authors in [19]. Operating at 40 kHz, it can realize ZVS at any load condition [19]. From zero to full load, the converter is designed to operate at the resonant frequency.…”

Section: B Dc-dc Applicationsmentioning

confidence: 99%

“…Many well-known MV SST designs are depicted in Fig. 1, including designs by Alstom [5], Bombardier [6], UNIFLEX [7], ABB PETT [8], GE Global Research [10], EPRI [9], ETH [11] and the FREEDM System Center [12], [13], [19].…”

Section: Introductionmentioning

confidence: 99%

“…While in the DC-DC stage, ZVS can be easily achieved and it enables a substantial reduction of the switching loss. Hence the switching frequency can be much higher [19], [20]. Type A SST is basically an isolated direct AC-AC converter and the MV devices may operate under hard switching condition.…”

Section: Introductionmentioning

confidence: 99%

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15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

et al. 2017

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Abstract-Due to much higher achievable blocking voltage and faster switching speed, power devices based on wide bandgap (WBG) silicon carbide (SiC) material are ideal for medium voltage (MV) power electronics applications. For example, a 15 kV SiC MOSFET allows a simple and efficient two-level converter configuration for a 7.2 kV solid state transformer (SST) for smart grid applications. Compared with multilevel input series and output parallel (ISOP) solution, this approach offers higher efficiency and reliability, reduced system weight and cost by operating at medium to high switching frequency. However, the main concern is how to precisely implement this device in different MV applications, achieving highest switching frequency while maintaining good thermal performance. This paper reviews the characteristics of 15 kV SiC MOSFET and offers a comprehensive guideline of implementing this device in practical MV power conversion scenarios such as AC-DC, DC-DC and AC-AC in terms of topology selection, loss optimization and thermal management.Index Terms-15 kV SiC MOSFET, efficiency, medium voltage, medium voltage power electronics, reliability, solid state transformer, smart transformer.

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Section: B Dc-dc Applicationsmentioning

confidence: 99%

Section: B Dc-dc Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

et al. 2017

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“…For the first requirement, compatibility with medium/high voltage, the main options that have been presented in the literature are based on the Dual Active Bridge (DAB) [11], [12] or based on the Modular Multilevel Converter (MMC) [13], [14]. However, the high dv/dt and the high voltage steps applied in medium/high frequency transformers [15] are still an issue because of their interaction with transformer parasitic elements that may cause two principal effects.…”

Section: Introductionmentioning

confidence: 99%

Current-Fed Multipulse Rectifier Approach for Unidirectional HVDC and MVDC Applications

Lambert

Soares

Wheeler

et al. 2019

IEEE Trans. Power Electron.

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Abstract-Even though multipulse rectifiers are a long established and well-known technology, still their behavior is not fully described in the literature when they are fed by three-phase balanced sinusoidal currents sources. To address the aforementioned gap, this work presents the operation and properties of current-fed multipulse rectifiers. The undertaken aim is achieved by analyzing the examined topology through circuit analysis and then, the theoretical results are validated through comparisons with the simulated waveforms and experimental results. Furthermore, the expected harmonic content and the duality with traditional voltage-fed multipulse rectifiers are presented. In the proposed structure, the transformer voltages present a multipulse waveform, instead of its primary currents as in voltage-fed multipulse rectifiers. This implies on limiting the voltage steps and its derivative which might be beneficial to reduce cost and volume of insulation, particularly for MVDC and HVDC applications. Besides that, by actively controlling the primary currents, a possible copper loss reduction is shown in the transformer windings, differentiating the proposed structure from its voltage controlled counterpart.

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Power Semiconductor Devices for Smart Grid and Renewable Energy Systems

Bose¹

2019

Power Electronics in Renewable Energy Systems and Smart Grid

176

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A Medium-Voltage Medium-Frequency Isolated DC–DC Converter Based on 15-kV SiC MOSFETs

Cited by 93 publications

References 20 publications

15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

Current-Fed Multipulse Rectifier Approach for Unidirectional HVDC and MVDC Applications

Power Semiconductor Devices for Smart Grid and Renewable Energy Systems

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