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Improved Series Z Source Inverter for PV System Using SVPWM Technique

Due to the ability of buck-boost and single-stage power turning of Z-source inverter (ZSI), it is preferred in stand-alone solar. While comparing with conventional ZSI, the capacitance voltage stress and inductance inrush current are significantly reduced by the series Z-source inverter (SZSI). For the load of an induction motor, the explanation is made for the operating modes of the SZSI in this paper. A supplementary mode is present while an induction motor operates with lower power factor. When the decoupling capacitor is not utilized using unidirectional source such as solar PV, pulses of higher magnitude will be appeared here on the voltage of DC link. Moreover, an advanced modulation technology is introduced for the improvement in the SZSI performance. The introduced method performance is shown by the results of simulation. So, the SZSI is the main technology for the stand-alone system of solar PV.