Performance Analysis of SAPF for Current Harmonic Mitigation

The harmonics and reactive power cause a number of undesirable effects like heating, equipment damage and Electromagnetic Interference effects in the power system. The conventional method to mitigate the harmonics and reactive power compensation is by using passive LC filters but this method has drawbacks like large size, resonance problem and fixed compensation behavior etc; Subsequently, the active power filter (APF) comes in to the picture, which gives promising solution to compensate harmonics and reactive power simultaneously by using suitable control algorithms. Different APF topology has proposed by many authors, such as series, shunt and hybrid type and these may be based on current source or voltage source. Series APF is used to compensate the voltage harmonics and shunt type for current harmonics.