Mixed cells modular multilevel converter

Adam, G. P. and Ahmed, K.H. and Williams, B.W.; (2014) Mixed cells modular multilevel converter. In: 2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE). IEEE, Piscataway, NJ, pp. 1390-1395. (https://doi.org/10.1109/ISIE.2014.6864817)

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This paper uses a scaled down version of the mixed cells modular multilevel converter (MMC) to discuss its modulation and capacitor voltage balancing method, and investigates its AC and DC fault ride-through capability. It has been found that the mixed MMC is resilient to both AC and DC network faults, which are necessary for next generations of highly meshed multi-terminal HVDC grids. The power losses comparison conducted in this paper has shown that the mixed cells MMC and three-level cells MMC achieve DC fault reverse blocking capability at reduced on-state losses than full-bridge MMC and alternative arm MMC.