MODULAR MULTILEVEL DC/AC CONVERTER COMPRISING A SERIES CONNECTION OF DC/AC INVERTER SUB-MODULES CONTROLLED BY A CENTRAL AND ELECTRICALLY PROTECTIVE SEPARATED COMMON CONTROL UNIT

摘要

The invention relates to a converter circuit (2) which comprises at least two submodules (6, 16) in the series circuit which draws electrical power via an inductance from a power source (40) which outputs a DC voltage (8). In this case, each submodule (6, 16) has a single-phase half-bridge (66) on the input side and a single-phase full bridge (70) on the load side, and the half bridge (66) and the full bridge (70) are on the DC voltage side and an intermediate circuit capacitor (68) is connected in parallel therewith. According to the invention, the converter circuit (2) has a control apparatus (34) which is provided for the purpose of directly actuating the full bridge (70) and the half bridge (66) of the first and second submodules (6, 16).