Droop Characteristics based High Speed Traction Power Supply system using Modular Multilevel Converter

The AC voltage and current imbalance that occurs in the traction system while sudden connection and disconnection of the traction in the single phase supply with transformer interfacing is a serious power quality issue. This paper delivers an alternate topology for the continuous and steady-state supply of power to the AC traction system. The MMC based converter system with the DC link is connected to the self-synchronizing inverters at the AC traction side. MATLAB Simulink™ based simulation is carried out and the droop characteristic based control of the traction side inverter is developed and the results are found to be satisfactory for the traction drive. The specification of the Indian scenario is considered for the simulation thus carried out and results obtained are discussed.