Shunt Active Power Filter for Harmonic Mitigation based on P-Q Theory

In the last few decades, the application of power electronics has been inseparable from the electrical system. Power electronics technology that is often used such as arc furnaces, variable Speed Drives (VSD), fluorescent lamps, and PC computers causes harmonic distortion and reduces the quality of electrical power. In this paper, shunt active power filter (APF) is used to mitigate harmonic distortion in the electrical system. P-Q theory is used to determine the anti-harmonic currents that will be injected on the electrical system for harmonic mitigation. From the test results obtained a decrease in Total Harmonic Distortion (THD) from 24.63% to 2.82%. In addition, the APF system can inject reactive power into the system at 1450 VAR.