Grid connected PV inverter using adaptive total sliding mode controller

Grid connected photovoltaic (PV) systems feed electricity directly to the electrical network operating parallel to the conventional source. To make the PV generation system more flexible and expandable, the back stage power circuit is composed of a boost converter and a pulse width modulation (PWM) inverter. This paper deals with design and simulation of a grid connected PV inverter. In the grid connected power supply mode, the goal of power management can be achieved by controlling the amplitude and direction of the output current in the inverter. An Adaptive Total Sliding Mode Control (ATSMC) scheme is designed for the inverter with a full bridge frame work. Digital Phase lock loop (PLL) is used to lock grid frequency and phase. Hence the grid connected inverter with the ATSMC scheme has low Total Harmonic Distortion and high power factor to provide an ac output with high power quality. The effectiveness of the proposed inverter with the ATSMC is verified using MATLAB / Simulink power system toolbox.