Medium-voltage DC grid connection using modular multilevel converter
In recent years medium voltage direct-current (MVDC) grids have gained significant attention. This paper presents a new isolated modular multilevel converter (MMC)-based dc/dc converter for connecting such networks. The proposed converter can connect DC grids with different voltage levels and control power flow among them. The proposed isolated dc/dc converter has fewer components compared to conventional isolated MMC-based dc/dc converter. A major challenge in MMC-based dc/dc converters is balancing capacitor voltages in each arm and phase. To this end, a closed loop control is proposed. Simulation results using Matlab/SIMULINK is provided to demonstrate the dynamic response under step changes of reference powers.
Publication Source (Journal or Book title)
2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
Jafarishiadeh, S., Farasat, M., & Sadigh, A. (2017). Medium-voltage DC grid connection using modular multilevel converter. 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017, 2017-January, 2686-2691. https://doi.org/10.1109/ECCE.2017.8096505