Abstract: Power quality troubles are increasing with the widespread utilize of electronic equipments, which induces harmonic distortion of voltages and currents. Individually, low power single-phase nonlinear load may not set numerous critical harmonic troubles but comprehensive concentrations of these loads have the potential to evoke harmonic voltages and currents to unsatisfactory levels and harmonic current "pollution" is a one of the major power quality problem in electrical power systems. In this research paper, nonlinear resistance and harmonic models of the instrumentalities with switch mode Terminal power supply (SMPS) are put through using MATLAB and Simulink has been done single-phase and three-phase circuits. To get over the troubles of the harmonics we should utilize some external components to compensate it. In this research Shunt Active Filter to compensate the harmonics are applied. And the outcomes of compensate are also be shown, as compensated of harmonics in this paper.

Keywords: Harmonics, power supply, filter, Matlab.