Design of shunt hybrid active power filter to reduce harmonics on AC side due to non-linear loads

Abstract

The quality of power is a major concern because of harmonics in the lines due to various sources. Passive filters have been used to reduce the specific harmonics. In this paper shunt hybrid active power filter consisting of both active filter and passive filter connected in parallel is designed to reduce harmonics in source side for non linear loads. The shunt passive filter includes a tuned RLC circuit that behaves like a band-pass filter for a particular harmonic content. The shunt active filter usually voltage source inverter (VSI) that produces reverse harmonic current based on Clarke’s transformation. The control strategy is implemented using instantaneous reactive power theory to design Shunt Hybrid Active Power Filter (SHAPF) for a non linear load. The proposed control technique is simulated using MATLAB SIMULINK, Results show that there is a considerable reduction in total harmonic distortion (THD) of source current from 30.35% to 3.25% with the proposed controller on shunt hybrid active power filter. The performance of SHAPF is better than Passive and Shunt Active Power Filters.