, Ch.V.Siva Kumar

The active power filter controller is based on the instantaneous power theory. And it can be classified in two groups. The first one is based on the transformation from abc phase to three-orthogonal axes, and other is based on directly from abc. In first method abc phases are converted into αβ0 transformation and is called as p-q theory. In second method it deals with directly abc phase, so it is called as abc theory. In second theory current minimization method is used to apply in real time application. The second method is proposed as control strategy in this paper because it has some advantages over p-q theory. The shunt active power filter is used for current compensation and series active power filter is used for voltage compensation. The matlab based simulation is done in this paper