This paper presents on the performance of Shunt Active Power Filter (SAPF) related to the number of power switch used in the circuit. The SAPF was used for harmonic compensation of single-phase ac/dc converter feeding a nonlinear load. The process involves an injection of equal but opposite current to mitigate the distortion current supplied back by non-linear load to the voltage supply. Thus, the injected current will shape the supply current to a sinusoidal form which is in phase with the supply voltage. Studies was performed to evaluate the SAPF topology performance with respect to the Total Harmonic Distortion (THD), odd harmonic components and power factor (PF) improvement. Theoretical and simulation results of SAPF performance are presented.
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