A three phase shunt active power filter based on instantaneous reactive power theory

Active power filters have become very popular in AC power networks for reducing harmonic pollution and for reactive power compensation. The network containing non linear loads like power converters are provided with either shunt type or series type active power filter for improving THD. It also improves voltage regulation and flicker unbalance. The instantaneous power theory also known as p-q theory is used for most of the active power filters. Shunt active power filter for three phase three wire AC network is explained in this paper. Instantaneous reactive rower theory is used in proposed shunt active power filter for extracting harmonic from source currents. The simulation results on Matlab/simulink tool are presented.