The paper is concerned with the design of multilevel converters for compensating the flicker on the medium-voltage distribution networks. Two topologies of converters are considered, namely the Diode Clamped MultiLevel Converter (DCMLC) and the Cascade H-bridge MultiLevel Converter (CMLC). By analytical procedure, the current ratings for the semiconductor devices of the converters are determined, and their passive elements are sized up. The main outcome of the study is that the two topologies substantially require the same overall rating for the semiconductor devices, with the exception of the clamping diodes in the DCMLC-based topology. As a counterpart, the latter topology needs a lower overall capacitance.
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