Improved Two Dimensions Decentralized Interleaving Method for Multicell Serial-Parallel Power Converters

Multi-phase multi-level power converters (MMCs) are a matter of concern, search, and research by scientists around the world. Because MMC sets have quickly proven outstanding advantages, such as improving power transmission, ensuring the desired voltage, reducing harmonics on the grid, eliminating high-order harmonics, reducing voltage switching, and improving the system's responsiveness to all kinds of loads. Moreover, the decentralized control structure of the MMC has a multi-cell form consisting of cells connected in series and parallel circuits (Two Dimensions-2D) and is capable of regulating the voltage and current supplied to the load. The output voltage can be easily adjusted by adding or removing a number of cells in series. The adjustment to satisfy different load capacities is done by adding or subtracting the number of parallel coupled cells. This paper presents an improved method of designing a 2D structured MMC using the carrier phase shift method to perform DC/DC modulation for DC load. The research focuses on building an algorithm to interleave the carriers of all cells, the solution to balancing the DC current between parallel branches to supply power to the load. The results are evaluated based on simulation results using Matlab/Simulink software.