Indirect Space-Vector-Based Modulation Techniques for High-Power Multimodular Matrix Converters
Indirect Space-Vector-Based Modulation Techniques for High-Power Multimodular Matrix Converters
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DOI：
10.1109/tie.2012.2200215
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发表时间：
2013-08
影响因子：
7.7
通讯作者：
Jiacheng Wang;Bin Wu;D. Xu;N. Zargari
中科院分区：
文献类型：
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作者：
Jiacheng Wang;Bin Wu;D. Xu;N. Zargari
将传统的多电平变换器与矩阵变换器的概念相结合，使多模块变换器达到了中压大功率水平。这些拓扑结构具有消除直流分量的特点，能够输出高质量的多电平波形。由于MMMC特殊的拓扑结构，不能直接采用传统变换器的调制策略。这就需要设计专门定制的调制方案，使它们产生正弦输入/输出波形。本文提出了一种基于空间矢量的mmmc间接调制技术。该研究首先建立了三模块MMMC拓扑的间接电路模型，然后使用空间矢量计算得出模型整流和反转阶段的占空比。由于反转级可以看作是多组三相输出，因此将其开关状态和占空比与整流级的开关状态和占空比进行转换并组合。最后，根据两种开关模式产生门控信号。仿真和实验结果表明，所提出的调制技术可以产生具有可变频率和幅值、可调角度和功率因数的正弦波形。所得结果也证明了第二种开关方式的优越性。
Combining concepts of traditional multilevel converter and matrix converter (MC), the multimodular MCs (MMMCs) have reached the medium-voltage high-power level. These topologies possess features such as elimination of dc components and are able to output high-quality multilevel waveforms. Due to the MMMC's particular topological structure, modulation strategies for the conventional converters cannot be directly adopted. This necessitates the design of specially tailored modulation schemes for them to generate sinusoidal input/output waveforms. In this paper, indirect space-vector-based modulation techniques are proposed for the MMMCs. The study begins by establishing an indirect circuit model for the three-module MMMC topology, before using space vector calculations to derive duty ratios for the model's rectification and inversion stages. As the inversion stage can be viewed as multiple sets of three-phase outputs, its switching states and duty ratios are then converted and combined with those from the rectification stage. Finally, the gating signals are produced according to two switching patterns. As demonstrated by simulation and experimental results, the presented modulation techniques can generate sinusoidal waveforms with variable frequency and magnitude, as well as adjustable angle and power factor. The superiority of the second switching pattern is also proved by the obtained results.