| Abstract |
A new converter concept for direct connection to the power line of AC-fed traction vehicles will be
introduced. This concept contains a new single phase AC/AC-modular-multilevel-converter (M2LC)
and a concentrated medium-frequency transformer. A design for multi-system operation will be
investigated that can operate on an AC15kV / 162/3Hz as well as an AC25kV / 50Hz power line.
The new single phase M2LC, enabling four quadrant operation, forms the core of this converter
concept. The basic characteristics of this new converter will be introduced. Simulations and analytical
investigations underline the attractiveness of this new M2LC converter. This versatile traction
converter concept stands out due to its modularity, its superior control characteristics as well as its
good adaptability to various traction drives. Therefore, the single phase M2LC has the potential to
replace the conventional transformer of future AC-fed traction vehicles. |
