Due to the wide spread of power electronics equipment in modern electrical systems, the increase of the
harmonics disturbance in the ac mains currents has became a major concern due to the adverse effects on all
analysis and simulation using MATLAB-SIMULINK of a three-phase shunt active equipment. This paper presents the Shunt Active Power Filter (SAPF) to compensate the generated harmonics by 3-phase Rectifier Bridge fed R-L load. The harmonic current extraction is based on prediction current extraction technique -hysteresis PWM generation pattern