| Abstract |
MMC-based converters are suitable to efficiently intertie the 50Hz three-phase grid with the 16.7Hz single-phase railway grid without a 16.7Hz transformer. In this paper, a new single-arm MMC-based converter topology with a multi-winding 50 Hz transformer is presented and simulated. The findings are compared to the direct and indirect MMC variants. The comparison shows a substantial reduction of the required number of modules, switches and installed semiconductor power with the proposed topology, while the system reliability is improved at the same time. |
