Metods for voltage ripple mitigation on DC side of single-phase AC\DC converters

Traction converter with medium frequency transformer (MFT) presents current trend of modern locomotive drives topology. Traction drives based on MFT significantly reduce weight of bulky low frequency traction transformers and present modern traction converter topology. Single-phase converters connected to the AC trolley line suffer by second harmonic voltage ripple on DC side. Second harmonic on DC side presents serious issue in application with high power consumption such as railway application. This paper describes three passive and one active method for mitigation this phenomenon. For each one method the simulation model is created. At the end pros and cons of these methods based on created simulations are evaluated.