Modular multilevel converters for HVDC applications: Review on converter cells and functionalities. Nami, A., Liang, J., Dijkhuizen, F., & Demetriades, G., D. IEEE Transactions on Power Electronics, 30(1):18-36, IEEE, 2015.
Modular multilevel converters for HVDC applications: Review on converter cells and functionalities [pdf]Paper  abstract   bibtex   
In this paper, the principle of modularity is used to derive the different multilevel voltage and current source converter topologies. The paper is primarily focused on high-power applications and specifically on high-voltage dc systems. The derived converter cells are treated as building blocks and are contributing to the modularity of the system. By combining the different building blocks, i.e., the converter cells, a variety of voltage and current source modular multilevel converter topologies are derived and thoroughly discussed. Furthermore, by applying the modularity principle at the system level, various types of high-power converters are introduced. The modularity of the multilevel converters is studied in depth, and the challenges as well as the opportunities for high-power applications are illustrated. © 2014 IEEE.

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