7-kV 1-MVA SiC-Based Modular Multilevel Converter Prototype for Medium-Voltage Electric Machine Drives

Pan, Jianyu; Ke, Ziwei; Sabbagh, Muneer Al; He, Li; Potty, Karun; Perdikakis, Will; Na, Risha; Zhang, Julia; Wang, Jin; Xu, Longya

doi:10.1109/tpel.2020.2978657

Cited by 65 publications

(23 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conducted experimental tests during train runs on the trial confirm the full functionality of the developed device. As can be seen from Figure 22, the three-phase seven-level CHB traction inverter (7L CHB), considered separately, characterizes peak efficiency around 99%, which is comparable to the corresponding SiC based MV multilevel CHB inverters constructed from low-voltage SiC MOSFET transistors, presented in the literature [22]. The efficiency of the 4QC input stage is slightly higher than that of the seven-level CHB traction inverter, because when cascaded H-bridges operate with a constant voltage of 3kV DC overhead traction line, actually only two SiC MOSFETs work in each H-bridge.…”

Section: Discussionmentioning

confidence: 59%

“…According to numerous recent publications, e.g., [20,21], cascaded cells converter systems, such as the CHB topology, are a very attractive solution to interface power electronic systems to MVA-scale medium voltage applications. For the systems connected to medium voltage grids the choice of fast switching and low voltage drop 1.2 kV or 1.7 kV devices (giving up to 15 cells per phase stack) can be the most suitable trade-off between efficiency and power density, with efficiencies above 99% at a power density of about 5 kW/dm 3 [22].…”

Section: Low Voltage Sic Power Modulesmentioning

confidence: 99%

“…With the wide availability of low voltage SiC MOSFET power modules on the market their performance in the range of maximum working currents offered is constantly increasing along with the progressive heat dissipation capacity. [22]. Higher switching frequency obtainable at lower blocking voltages allows to reduce loss and volume contributions of the grid filter inductances and the cooling system.…”

Section: Low Voltage Sic Power Modulesmentioning

confidence: 99%

See 2 more Smart Citations

SiC-Based Power Electronic Traction Transformer (PETT) for 3 kV DC Rail Traction

Adamowicz

Szewczyk²

2020

Energies

View full text Add to dashboard Cite

The design of rolling stock plays a key role in the attractiveness of the rail transport. Train design must strictly meet the requirements of rail operators to ensure high quality and cost-effective services. Semiconductor power devices made from silicon carbide (SiC) have reached a level of technology enabling their widespread use in traction power converters. SiC transistors offering energy savings, quieter operation, improved reliability and reduced maintenance costs have become the choice for the next-generation railway power converters and are quickly replacing the IGBT technology which has been used for decades. The paper describes the design and development of a novel SiC-based DC power electronic traction transformer (PETT) intended for electric multiple units (EMUs) operated in 3 kV DC rail traction. The details related to the 0.5 MVA peak power medium voltage prototype, including the electrical design of the main building blocks are presented in the first part of the paper. The second part deals with the implementation of the developed SiC-based DC PETT into a regional train operating on a 3 kV DC traction system. The experimental results obtained during the testing are presented to demonstrate the performance of the developed 3 kV DC PETT prototype.

show abstract

Section: Discussionmentioning

confidence: 59%

Section: Low Voltage Sic Power Modulesmentioning

confidence: 99%

Section: Low Voltage Sic Power Modulesmentioning

confidence: 99%

See 1 more Smart Citation

SiC-Based Power Electronic Traction Transformer (PETT) for 3 kV DC Rail Traction

Adamowicz

Szewczyk²

2020

Energies

View full text Add to dashboard Cite

show abstract

“…N OWADAYS, the modular multilevel converter (MMC) is a prominent solution for high voltage direct current (HVDC) transmission systems [1], [2] and for medium voltage drive applications [3], [4]. The main benefits of the MMC are its modularity and scalability to reach high voltage requirements, high efficiency, low harmonic distortion, transformerless operation, and reduced dv/dt in each switch [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of a Nested Control System to Balance the Cell Capacitor Voltages in Hybrid MMCs

et al. 2021

View full text Add to dashboard Cite

In a hybrid modular multilevel converter (MMC), capacitor voltage balance between the Full-Bridge Sub-Modules (FBSMs) and Half-Bridge Sub-Modules (HBSMs) is only possible when the arm currents are bipolar. For a grid-connected MMC, operating at unity power factor, this is typically achievable when the modulation index is less than 2. Previous control methodologies, based on open-loop feed-forward compensating currents, have been proposed to operate an MMC with a higher modulation index. However, these solutions do not minimize the compensating currents; they cannot compensate entirely for both the variations in the operating conditions and the parameters typically encountered in a real implementation; and they do not consider the actual capacitor voltage imbalance between the FBSM and HBSMs. In this paper, a new nested closed-loop control algorithm based on an outer voltage control loop with an inner current loop is proposed and experimentally validated. Feed-forward currents are still utilised in the inner loop, but they are calculated using a new optimising algorithm which minimises the required compensating currents. Moreover, to the best of our knowledge, this is the first work where explicit algebraic equations to calculate these compensating currents are provided. Experimental results to validate the approach, obtained with an 18-cell hybrid MMC, are presented and discussed in the paper.

show abstract

“…For MV converters, 10 kV SiC MOSFETs are substituting their 6.5 kV Si IGBT counterparts due to inherent superiority [8] , meanwhile offering system benefits of higher efficiency, higher switching frequency, high-density, topology simplification, and high control bandwidth. Consequently, if the power cell's (submodule's) kernel piece is SiC MOSFET, design will be able to meet high-density and efficiency, as shown in the lastest SiC MOSFET-based MMC converters [9][10][11] .…”

mentioning

confidence: 99%

Design of a 10 kV SiC MOSFET-based high-density, high-efficiency, modular medium-voltage power converter

Mocevic

Fan

et al. 2022

iEnergy

View full text Add to dashboard Cite

Simultaneously imposed challenges of high-voltage insulation, high dv/dt, high-switching frequency, fast protection, and thermal management associated with the adoption of 10 kV SiC MOSFET, often pose nearly insurmountable barriers to potential users, undoubtedly hindering their penetration in medium-voltage (MV) power conversion. Key novel technologies such as enhanced gatedriver, auxiliary power supply network, PCB planar dc-bus, and high-density inductor are presented, enabling the SiC-based designs in modular MV converters, overcoming aforementioned challenges. However, purely substituting SiC design instead of Sibased ones in modular MV converters, would expectedly yield only limited gains. Therefore, to further elevate SiC-based designs, novel high-bandwidth control strategies such as switching-cycle control (SCC) and integrated capacitor-blocked transistor (ICBT), as well as high-performance/high-bandwidth communication network are developed. All these technologies combined, overcome barriers posed by state-of-the-art Si designs and unlock system level benefits such as very high power density, high-efficiency, fast dynamic response, unrestricted line frequency operation, and improved power quality, all demonstrated throughout this paper.

show abstract

7-kV 1-MVA SiC-Based Modular Multilevel Converter Prototype for Medium-Voltage Electric Machine Drives

Cited by 65 publications

References 24 publications

SiC-Based Power Electronic Traction Transformer (PETT) for 3 kV DC Rail Traction

SiC-Based Power Electronic Traction Transformer (PETT) for 3 kV DC Rail Traction

Experimental Validation of a Nested Control System to Balance the Cell Capacitor Voltages in Hybrid MMCs

Design of a 10 kV SiC MOSFET-based high-density, high-efficiency, modular medium-voltage power converter

Contact Info

Product

Resources

About