Design Single Phase Five Level Packed U-Cell Inverter For Standalone and Grid Connected Modes

Abstract

The Packed U-Cell (PUC) inverter now has a new mode of operation is presented in this work. The PUC five levels inverter is a switching inverter that is integrated into the process, is designed using a sensor-free voltage control system that uses redundant switching states. The Voltage control without sensors maintains half the voltage of the DC source on the DC capacitor, resulting in a minimal harmonic distortion symmetric five-level voltage waveform at the output. The suggested converter’s voltage regulator with no sensors simplifies the control system’s complexity, making it suitable for industrial applications. The introduced sensor-less technology is being used in a grid-connected application PUC5In order to inject real and reactive power into the grid with a changeable power factor from the inverter, an external current controller was employed, The PUC auxiliary DC bus, on the other hand, is controlled solely by a sensor free controller and a new switching scheme. The proposed PUC5 inverter’s simulation results in grid-connected and stand-alone operation modes demonstrate the sensor free voltage control’s a quick response time and good dynamic performance in achieving the necessary DC capacitor voltage balance.