An Extensive Comparison between MMC Topologies with different number of Sub-Modules

This digest describes a modular multi-level converter (MMC) scheme to connect renewables to the grid with minimal filter requirement. The PWM scheme generates a multi-level voltage output with low loss, low harmonic distortion, and design flexibility. It presents a comparison of the MMC topology with a different number of sub-modules. The last section focuses on the energy storage in capacitors with a different number of sub-modules under different conditions. The stored energy can be useful for fault ride through during grid fault conditions.