Modular Multilevel Converter & Alternate Arm Converter for High Frequency Networks

Abstract

In the present scenario, use of multilevel inverters, modular multilevel converters (MMC) an alternate arm converters (AAC) in high power and high frequency applications clearly can be seen. The MMC-HVDC has the advantage in terms of scalability, performance, and efficiency over two-and three-level VSC-HVDC.A very high quality and low distortion of output voltage, low blocking voltage of semiconductor switches and the reduction of the size of the links and capacitors in modular converters (MMC) are more advantageous than conventional voltage source converters. Additionally to concentrate the volume of the capacitors of the cells increasing the frequency is beneficiary, also using high frequency can be bring benefits to other passive components such as the transformer etc. Here a Novel Fuzzy based comparison is presented for 350 Hz 30MW interconnected network using MMC and AAC for better voltage profile and smooth operation and validated in Matlab simulink.