Modeling and Analysis of Switching-Ripple Voltage on the DC Link Between a Diode Rectifier and a Modular Multilevel Cascade Inverter (MMCI)
Modeling and Analysis of Switching-Ripple Voltage on the DC Link Between a Diode Rectifier and a Modular Multilevel Cascade Inverter (MMCI)
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DOI：
10.1109/tpel.2012.2199519
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发表时间：
2013
影响因子：
6.7
通讯作者：
Hui Peng;M. Hagiwara;H. Akagi
中科院分区：
文献类型：
--
作者：
Hui Peng;M. Hagiwara;H. Akagi
研究了用于中压电机驱动的三相二极管整流器和基于双星斩波单元的模块化多电平逆变器(MMCI-DSCC)之间的公共直流侧电压。即使在直流链路上没有电容器时，该电机驱动器也可以运行。然而，直流链路上会出现不可忽略但可预测的开关纹波电压。本文实现了对开关纹波电压的建模和分析，为设计由薄膜电容器和阻尼器串联而成的小型直流无源滤波器提供了可能。一个400V、15kW的小型化系统被用来验证分析和DC滤波器的有效性。实验结果表明，该直流滤波能很好地抑制开关纹波电压，与额定功率15kW相比，阻尼器中的功率损耗可以忽略不计。
This paper focuses on the common dc-link voltage between a three-phase diode rectifier and a modular multilevel cascade inverter based on double-star chopper cells (MMCI-DSCC) for a medium-voltage motor drive. This motor drive can be operated even when no capacitor exists on the dc link. However, a nonnegligible, but predictable, amount of switching-ripple voltage occurs on the dc link. This paper achieves modeling and analysis of the switching-ripple voltage, thus making it possible to design a small-sized dc passive filter consisting of series connection of a film capacitor and a damping resistor. A 400-V, 15-kW down scaled system is used to confirm the effectiveness of the analysis and the dc filter. Experimental results show that the switching-ripple voltage can be attenuated satisfactorily by the dc filter, and that the power loss dissipated in the damping resistor is negligible, compared to the rated power of 15 kW.