Voltage control of DC-DC buck converter using second order sliding mode control

This paper presents a robust voltage control intended for a photovoltaic system, the main objectives of the proposed control is to adapt with the parameter variations and load disturbances. Second order sliding mode controller, based on super twisting algorithm for DC-DC Buck converter is proposed. Applying SOSMC can improve the transient response of the system for a wide range of reference voltage or under large parameter variations and load disturbances. The robustness of the proposed control is tested by simulation in deferent operation condition such as parameters variation and load change. The experimental results confirm the effectiveness of the proposed control.