Comparison of converter transfer function models for estimate harmonic currents generated by ac/dc converters under unbalanced conditions

This paper compares different transfer function models used for calculating ac and dc current harmonics produced by six-pulse ac/dc converter under unbalanced and or distorted supply conditions. The paper describes the functions and how they are used to calculate ac and dc current harmonics. Calculated and simulated results obtained from power system blockset (PSB) in the Simulink environment are presented for comparison purpose.