Mitigation of Harmonic Current through Hybrid Power Filter in Single Phase Rectifier

Abstract — This paper presents a single-phase Hybrid Power Filter (HPF) for harmonics and reactive power compensation. This proposed topology reduces the rating and size of the filter components. A combination of Passive and Active Filter is proposed for reducing the rating of filter. In the proposed technique Passive Filter (PF) is tuned to compensate 3 rd and 5 th order harmonics and Active Power Filter (APF) compensates all remaining harmonic components which are not compensated by passive filter. A half bridge inverter with DC bus capacitor is used as active filter. It has only two power switches. The active power filter control is based on DC side voltage control. The effectiveness of the proposed algorithm is demonstrated by its simulation in PSIM software. The simulation results show that the designed hybrid filter compensate the harmonic currents produced by loads and the power factor, making the current at the source side to become sinusoidal and in phase with the system voltage.