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The recently proposed Hexverter topology belongs to the group of modular multilevel direct AC/AC converters. For its operation, a so-called adjacent compensating power is essential. This paper introduces a new method for composing the adjacent compensating power, which optimises the efficiency. The importance of the adjacent compensating power for branch energy control is shown and the differences...
Modular multilevel converters offer many advantages for high-voltage and high-power applications. A recently proposed modular multilevel direct AC/AC converter is the so-called Hexverter. This paper presents a method to control the energy stored in the branches of the Hexverter topology. The control concept is described and possible degrees of freedom for the branch energy control are analysed analytically...
The recently proposed modular multilevel converter “Hexverter” offers many advantages in high-voltage and high-power applications. This paper presents an improved Hexverter topology by introducing magnetically coupled branch inductors. These lead to a simplified system behaviour and a reduced amount of material for the branch inductors.
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