Topology Connecting Strategy of the Modular Multilevel Matrix Converter for Optimal Switching Times
Li Yao, Xu Lie, Li Yongdong
State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China
Abstract：Modular multilevel matrix converter (MMMC) can convert three-phase AC system to another three-phase AC system. MMMC has the advantages of modularization and good low frequency characteristics, which can be used for high voltage and large capacity drive systems. MMMC mainly includes the topology without branch inductors and the topology with branch inductors. The topology without branch inductors can reduce the volume and weight of the system, however it has a complex modulation with varied topology connecting methods. This paper studies on the MMMC without branch inductors, builds a switching mathematical model of the topology, and proposes the connecting strategy of the optimal switching times based on space vector pulse width modulation. The proposed strategy ensures the optimum of the switching times, and simplifies the modulation. Simulation and experimental results verify the effects of the connecting strategy.
李遥, 许烈, 李永东. 模块化多电平矩阵变换器开关次数最优的拓扑连接策略[J]. 电工技术学报, 2018, 33(2): 342-352.
Li Yao, Xu Lie, Li Yongdong. Topology Connecting Strategy of the Modular Multilevel Matrix Converter for Optimal Switching Times. Transactions of China Electrotechnical Society, 2018, 33(2): 342-352.
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2018, Vol. 33 
