2D Decentralized Interleaving Principle for Multicell Serial-Parallel Converters

This paper proposes a 2-Dimension decentralized interleaving principle for a multicell serial-parallel converter with serial and parallel associations of switching-cells using phase-shifted carriers (PSPWM). Each cell of the converter synchronizes and regulates simultaneously its own carrier angle in two dimensions based on the information of neighboring serial and parallel cells. Unlike the principle using local interconnections with the two neighboring independent elementary controllers in the conventional decentralized control method, this proposed 2D approach offers a faster response to interleave the PSPWM control signals of a multicell serial-parallel converter presenting a large number of cells, especially when a dynamic reconfiguration of the system is required.