Control Strategy for Closed Control of Quasi-Z Source Based Cascaded H-bridge Inverter

In traditional Voltage Source Inverter (VSI), the magnitude of output voltage is less than or equal to the DC input voltage so boosting of voltage is required, generally DC-DC Converters are used to boost the voltage. But this boosting may create a complication in the power converter. And this limitation of traditional VSI can be replaced with the help impedance source network topology that is qZSI this has an advantage of lower THD's, less number of the component count, decreases the system losses and improves the efficiency, single stage conversion is there. This qZSI boost the voltage with the help of shoot through state and it has its limitation. This paper discusses the control strategy for closed loop control of Quasi-Z Source Inverter (qZSI) that can be applied as impedance source H bridge Inverter.