International Research Journal of Education and Technology

In three-phase grid-connected solar photovoltaic (PV) systems, a novel nonlinear feedback controller based on direct current (DC) voltage control is proposed to control the flow of active and reactive power between the PV system and the grid with improved power quality v considering pure sinusoidal current injection with lower total harmonic distortion (THD), as well as to ensure unity power factor or to compensate for the reactive power required by the load, i.e. the electrical network. The output power of the PV array is fed to the grid via a maximum power point tracking (MPPT) boost converter and an inverter. The simulation results of the proposed controller show good robustness under rated conditions, parameter variations and load disturbance, which is the main advantage of this controller compared to the existing controller. The performance of this work was evaluated using the MATLAB/Simulink environment.