Industrial and domestic devices use increasingly electronic circuits having a non-linear behavior. They generate in the distribution networks non-sinusoidal currents causing harmful effects. This work focuses on using a parallel active filter for rejection of harmonic disturbances. The feed source is not an autonomous voltage source but a capacitance which is charged through a rectifier formed by diodes connected in anti-parallel with the terminals of the transistors. In order to maintain this tension constant, ensure good quality and availability of generated electricity an optimal solution is preferred using photovoltaic solar energy with DC-DC boost converter and a global research method of perturbation and observation (P&O).

The entire network is modeled using Matlab-Simlulink based on an electrical study. A non-linear load is associated with a photovoltaic generator (GPV) and a shunt active filter is implemented which has two main functions: identifying harmonic currents and controlling the inverter to inject the compensating currents. Conventional techniques (Fast Fourier Transform (FFT)) and instantaneous powers method ('p-q' Theory) are used to calculate and identify the harmonic current.

For the injection of the currents in the electric network a PI controller is employed to adjust the DC current. A command with hysteresis control compared to a natural PWM control (Pulsation Width Modulation) used to re-inject harmonics currents. Finally a simulation with Matlab/Simulink environment demonstrated the effectiveness and the robustness of these strategies.