Robust Voltage Tracking Control of Three-Phase Four-Wire Split DC Bus Inverter via Time-Scale Separation Technique

The problem of controller design is investigated for a three-phase four-wire split dc bus inverter with output filters and loads. The proposed time-scale separation technique for controller design gives the possibility to achieve a high accuracy of three-phase voltage generation subject to variations of source voltages or load resistors. The discussed approach to problem of three-phase inverter controller design provides high power quality with small harmonic distortion. The efficiency of the discussed design methodology is highlighted by simulation results.