Integral Sliding Mode Compound Control Strategy for Quasi-Z Source Grid-Connected Inverter

In order to improve the robustness and increase the fast response, a novel current controller with the integral sliding mode control and quasi-PR control is proposed for the quasi-Z source inverter (qZSI). Firstly, the state space equations of the qZSI are established. Secondly, the sliding surface of the proposed controller is built. In the same time, the stable, existence and arrival conditions of the sliding surface are derived. Thirdly, a compound control strategy has been analysis analyzed. Finally, a MATLAB model is built. The simulation results verify the proposed controller can achieve a faster dynamic response and realize stable compared to the traditional PI controller.