Photovoltaic based adaptive shunt hybrid filter for power quality enhancement

Power electronic controller based power system equipment are widely used in industrial, commercial and residential sectors. These controllers help in energy saving, but they introduce different power quality issues such as harmonic distortions in current and voltage, voltage sag/swell etc. These power quality issues cause malfunctioning of associated circuits. This paper presents an adaptive shunt hybrid filter where voltage support for DC link capacitor is provided by solar photovoltaic source which improves the power quality by eliminating current harmonics, and improving the power factor. With the help of suitable control algorithm, the filter achieves capability of real power pumping to the grid in addition to harmonic and reactive compensation. The simulation results are carried out with three phase non-linear loads under balanced and/or unbalanced source/load conditions. The results obtained are satisfactory which depicts the effectiveness of the control algorithm and improvement in the power quality with Solar Photo Voltaic integration.