Design and Implementation of New Extended-Boost Quasi Z-Source Inverters for High-Boost DC-AC Power Conversion

Abstract

Power electronics has witnessed significant advancement in recent years, increasing the demand for compact, efficient, and flexible inverter systems capable of operating over wide voltage ranges. Traditional voltage-source and current-source inverters suffer from inherent limitations such as the inability to provide a voltage boost and vulnerability to shoot-through faults. Impedance Source Inverters (ISIs), particularly the Z-Source Inverter (ZSI), emerged as a practical solution by enabling single-stage buck–boost operation. However, the conventional ZSI produces a discontinuous input current due to its input diode, making it unsuitable for renewable energy sources such as photovoltaic (PV) systems and fuel cells.