Decentralized Interleaving and Current Control for Multicellular Serial-Parallel Converters

This paper presents the study of interleaving Pulse Width Modulation (PWM) signals and current control method which is based on the decentralized principle for multicellular serial-parallel converters. Firstly, the decentralized principle will be applied to interleave the Phase-Shifted PWM control signals of a multicellular serial-parallel converter. Secondly, the decentralized principle will be used for the balancing of the currents in the parallel legs of the converter. The simulation results demonstrate the feasibility and effectiveness of the proposed decentralized control algorithm applied to a multicellular serial-parallel converter presenting a large number of cells, especially when a dynamic reconfiguration of the system is required.