Ripple Current Compensation of DAB Converter with Matching Transformer-Less Series DC Active Filter in DC Distribution Feeder

This study proposed ripple current compensation for a dual active bridge (DAB) converter with a matching transformer less series DC active filter (DCAF) in a DC distribution feeder. The input and output currents of the DAB converter exhibit large ripples. This ripple current affects the devices connected to DAB converters, such as batteries and solar cells. A matching transformer less DCAF is connected in series between DC voltage source and DAB converter. A computer simulation was performed using piecewise linear electrical circuit simulation to verify the validity of the proposed system. The simulation results indicated that the ripple current and voltage of the input-side of DAB converter reduced to 55.9 % and 82.0 % using the matching transformer less series DCAF.