Hardware implementation of single-phase Shunt Active Power Filter with hysteresis current control loop for rectifier type load

This paper presents a Shunt Active Power Filter (SAPF) topology using four bi-directional power switches. The SAPF provides a current pathway for the distorted current when supply voltage is connected to a nonlinear load. Hysteresis current control loop switching strategy is used to re-shape the distorted current. Therefore, total input current drawn from the supply will be in sinusoidal shape & in the phase. Safe commutation strategies is developed to prevent over current spike during the transition between positive cycle and negative cycle of the remaining distorted current. MATLAB/SEVTULINK is used to simulate and verify the operation of the SAPF. Laboratory prototype for this topology is built & tested. This will provide the clean power at source side in terms of Power Factor and Total Harmonics Distortion (T.HD.).