High performance stand-alone and grid connected inverter using adaptive total sliding mode controller

Distributed Generation modules can operate in grid tied and off grid modes in order to provide power to the emergency load during system outages. This paper addresses a PhotoVoltaic (PV) based Distributed Generation system. A high performance DG inverter is developed in this paper which includes the functions of stand-alone and grid connected power supply. In the stand-alone power supply mode, the output ac voltage can supply loads. 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 proposed high performance inverter with a full bridge framework. The proposed inverter with the ATSMC scheme has the output voltage with a low Total Harmonic Distortion in the stand-alone power supply mode. In grid connected power supply mode, the ATSMC scheme maintain the inverter current with a high power factor. Hence the proposed DG inverter can provide an ac output with improved power quality. The effectiveness of the proposed high performance inverter with the ATSMC is verified using MATLAB / Simulink.