Djeffal, El Hadi2018-12-272018-12-272016http://hdl.handle.net/123456789/7594The increasing use in industry of controlled systems based on electronic power load to increasing disruption in electrical networks. Thus, there is a study increase, of the rate of harmonic and unbalanced currents and a high consumption of reactive powers from users. The circulation of these currents will also cause harmonics and voltage unbalance disruptions, which will be superimposed on the nominal voltage electrical network. The analysis work carried out from a theoretical and simulation study of mechanisms of harmonic propagation, and the deterioration of the delivered power quality. Thus a compensation of the reactive power in different places shows us the effect on the various parameters (Voltage and current for example), and to see which is the place more adapted to establish this compensation. Results of simulation, and the calculation of the FFT justified the choice of the place of the compensation, the place which we fixed allows to avoid the risk of resonance, while keeping an acceptable plan of voltagefrOther