Sliding Mode Control of a Three Phase Grid Connected Photovoltaic System with a Nonlinear Load.

This paper presents the analysis, the model and the advanced control strategy of a photovoltaic system connected to a three phase grid and a nonlinear load. The model is based on electrical equations of the system and the controller is realized by using instantaneous reactive power theory, dq transformation and it applies the sliding mode technique in order to extract the maximum power produced by the Photovoltaic array, to control the power flow between Photovoltaic generator PVG and the grid, and to compensate the reactive power and harmonic components caused by nonlinear load. Simulation results demonstrate the performance of this controller. So, the Maximum Power Point Tracking MPPT is realized with high precision and Unity Power Factor is achieved under complex conditions: climatic changes, system's perturbation and different kind of load. Moreover, the robustness of this controller represents a better advantage compared to other strategies developed for the studied topology of the photovoltaic system. [ABSTRACT FROM AUTHOR]