Performance evaluation of reference current extraction methods for hybrid active power filter

Active power filter (APFs) has been used to mitigate the harmonic pollution in an electrical network. Reference current estimation is an important part for control of an active power filter. In any inaccuracy in generation of reference current, it yields to poor compensation in load current harmonics. This paper deals with five types of time domain control techniques for real time compensating current for shunt hybrid active power filter. This work also reveals the advantages and disadvantages of the practiced control strategies. The five strategies are analyzed and compared in terms of their performance under balance source and balance load conditions. The comparison and effectiveness of all the methods are based on the theoretical analysis and simulation results obtained with MATLAB/SIMULINK power system block set employing in a three phase three wire network. Here, a three phase six pulse rectifier with R-Load is considered as a nonlinear load.