As a result of the need to replace fossil fuels with regenerative, electrical energy, power electronics is becoming increasingly important for energy grids. The main future requirements are the flexible control of energy distribution and the stabilization of AC-grids by electronically controllable DC-grids. Significant progress has been made in this respect by the invention and industrial introduction of Modular Multilevel Converters (MMC). In this work, fundamental advances of MMC are investigated, which are made possible by novel submodule topologies in combination with silicon carbide power semiconductors. The results obtained by means of general analytical methods show that, with regard to all points of future importance - functional safety, explosion protection, electronic limitation of overcurrents/short-circuit currents and reduced energy losses - significant progress has been achieved. Using the analytical methods developed, it is shown that - compared to the state of the art - both the energy storage and the energy losses can be bisected.    «

As a result of the need to replace fossil fuels with regenerative, electrical energy, power electronics is becoming increasingly important for energy grids. The main future requirements are the flexible control of energy distribution and the stabilization of AC-grids by electronically controllable DC-grids. Significant progress has been made in this respect by the invention and industrial introduction of Modular Multilevel Converters (MMC). In this work, fundamental advances of MMC are investiga...    »