Development and Experimental Validation of a Reduced-Scale Single-Phase Modular Multilevel Converter Applied to a Railway Static Converter

With special emphasis in recent years, an increase has been verified not only demand but also the price of electricity, arising need to develop more reliable and efficient electrical energy conversion systems. In this context, emerges utilization modular multilevel converter (MMC) based on submodules. The key MMC is modularity, which allows reach higher performance levels, improving voltage current output signals converter, a compact solution. modularity concept operation using submodules series, operating parallel. Additionally, event submodule malfunction, can be reconfigured continue operation, albeit at lower power level. Due its versatility, used variety applications, such as HVDC transmission systems, solid-state transformers, renewable interfaces, recently, railway paper focuses development experimental validation single-phase use half-bridge applied static where main focus lies AC side control. control algorithms are fully described for reduced-scale prototype implemented (500 W, 230 V–50 Hz, 200 VDC), connecting two series upper arm, respective driver command circuits, sensing signal conditioning well digital platform recurring DSP TMS320F28379D. Experimental results were obtained validate each individually, and, later, verify with set four