7-kV 1-MVA SiC-Based Modular Multilevel Converter Prototype for Medium-Voltage Electric Machine Drives
7-kV 1-MVA SiC-Based Modular Multilevel Converter Prototype for Medium-Voltage Electric Machine Drives
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DOI：
10.1109/tpel.2020.2978657
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发表时间：
2020-03
影响因子：
6.7
通讯作者：
J. Pan;Ziwei Ke;Muneer Al Sabbagh;He Li;K. Potty;Will Perdikakis;Risha Na;Julia Zhang;Jin Wang;Longya Xu
中科院分区：
文献类型：
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作者：
J. Pan;Ziwei Ke;Muneer Al Sabbagh;He Li;K. Potty;Will Perdikakis;Risha Na;Julia Zhang;Jin Wang;Longya Xu
本文介绍了一个7千伏直流母线，1兆伏安，0-1000赫兹的模块化多电平变换器（MMC）的高速中压变频驱动器的原型设计和开发。该系统基于1.7 kV碳化硅（SiC）晶体管设计。首先，对原型进行了全面深入的设计，包括子模块、臂电感和系统集成。然后，提出了独特的控制方案和控制硬件设计，以实现全频率范围的工作。分析了基于Si和SiC器件的功率损耗。最后，实验结果证明了基于SiC的子模块和全尺寸MMC系统的性能。与传统的硅基方案相比，所建立的SiC MMC可将驱动系统体积减小75%，功率密度达到325%，峰值能效达到99.35%左右。
This article presents the design and development of a 7-kV dc bus, 1-MVA, 0–1000 Hz modular multilevel converter (MMC) prototype for high speed medium-voltage variable frequency drives. The system is designed based on 1.7-kV silicon carbide (SiC) mosfets. First, the full in-depth design of the prototype is provided, including the submodules, arm inductors, and system integration. Then, the unique control scheme and the control hardware design are presented to achieve the full-frequency range operation. The power loss based on Si and SiC devices is analyzed. Finally, experimental results are presented to demonstrate the performance of both the SiC-based submodule and the full-scale MMC system. Compared with the traditional Si-based solution, the established SiC MMC can reduce the drive system volume by 75% and achieve 325% power density, and the peak energy efficiency reaches around 99.35%.