Quasi Z-source Inverter Control as Interface Converter for Photovoltaic System Grid-Connected

In this paper quasi Z-source inverter used for a photovoltaic system as an interface converter and a randomly distributed generation resources. To obtain a system dynamics model, it is used linear small-signal model system around a specific operating point. To obtain the equations describing the system it is used matrix medium for the inverter. The dynamic modeling inverter system is used to design the appropriate controller. For this purpose, in this paper the appropriate controllers are introduced for photovoltaic system. The introduced systems, voltage of the photovoltaic system controlled by setting a range of short-circuit an inverter legs. Since PV production capacity is not clear, the purpose of the controller, PV voltage regulator on the point at which maximum power absorbed from the source. To evaluate the performance of quasi Z-source inverter controller, it is used from simulation in the environment of MATLAB / simulink.

Keywords:

Quasi Z-source Inverter , Photovoltaic System , Dynamic Modeling , Controller Design