Takasaki, "A transformerless D-STATCOM based on a multivoltage cascade converter
requiring no dc sources," IEEE Trans.
A Hybrid Cascade Converter
Topology With Series-Connected Symmetrical and Asymmetrical Diode-Clamped H-Bridge Cells.
Classification, terminology, and application of the modular multilevel cascade converter
(MMCC)," IEEE Trans.
Such efficiency improvement is interesting to demonstrate since a cascade converters connection introduces additional parasitic resistances in contrast with singe converters.
Figure 11 presents the experimental waveforms of the inductors and input current in the cascade converters connection, where the complementary behavior is observed.