3-phase converter modeling for unbalanced radial systems

This paper presents an overview of a power converter model intended for both balanced and unbalanced radial power flow studies. A three-phase, steady-state modeling approach to power converters (AC/DC-DC/AC) is outlined where the three-phase rectifier and the three-phase inverter are modeled as three, equivalent, Y-connected single-phase rectifiers and single-phase inverters, respectively. This work specifically focuses on a converter composed of a diode rectifier, a loss-less DC link and a pulse-width-modulated inverter is presented. The model can be implemented within a three-phase sequential power flow solver.