Currently, photovoltaic inverters are used in electricity production. They must therefore meet the requirements and needs of the electricity grid. They are not only used to provide active and reactive power, but also contribute to other tasks such as power quality, frequency and voltage regulation. This paper presents a photovoltaic system connected to the grid via an inverter combined with a parallel active filter. The model aims to provide active power to the grid as well as reactive power with a higher power quality. Thus, this model can compensate for harmonics caused by the grid or non-linear loads. The command of this model requires a robust and reliable control system to perform the three above-mentioned tasks (quality, frequency and voltage regulation). Consequently, the instantaneous power method was chosen for this model. This system was simulated in the Matlab/Simulink program to validate its function.

Keywords: Photovoltaic system (PV), Active power filter (APF), Grid connected, Instantaneous power theory, Maximum power point tracking (MMPT)