capacitor voltage ripple reduction in modular multilevel converters in drive application

Given the increase in demand for medium voltage (mv) electric motors and their high-power capacity (ranging from hundreds of kilowatts to several megawatts), especially in power-intensive industries like oil, gas, and mining, there is a growing preference for multilevel converters. this is due to their ability to offer superior output quality, lower nominal voltage of semiconductor switches, reduced dv/dt, lower switching frequency, and minimized losses compared to the two-level voltage source converter (vsc). specifically for high-power variable frequency drives in industrial settings, the modular multilevel converter (mmc) has emerged as a highly promising topology within the multilevel converter family. the mmc boasts several advantages, including the absence of high voltage semiconductor switches, isolated dc sources, and complex transformers.