Indirect-Adaptive Sliding-Mode Voltage Control of the Switched-Inductor Z-Source Inverter

This research presents a new sliding-mode adaptive technique for stabilization of the output voltage of a single-phase Switched Inductor Z-source Inverter (SIZSI) as an interface in renewable energy sources. The proposed method is based on a sliding mode controller modified by an online adaptation of uncertain inverter parameters. The sliding mode controller improves the system's robustness in the face of external disturbances and preserves the system's output for any load, such as linear, nonlinear, and even changing loads. The proposed approach has been simulated in MATLAB/Simulink software package to show the controller's performance. The comparison results with the traditional sliding mode control have been conducted to validate the proposed method's superiority in resolving problems such as adaptive and robust against instantaneous deviations of input voltage and output current. The presented sliding-mode adaptive control technique shows a more efficient dynamic response to the system and less Total Harmonic Distortion (THD) than traditional controllers.

Keywords:

Impedance source inverter , switched inductor Z-source inverter (SIZSI) , voltage control , sliding mode control , indirect adaptive control