Predictive control of active power filters

A novel technique for delayless calculation of the fundamental component of the input current for a three-phase rectifier, with inductive smoothing filter, is presented. The technique provides a means to accurately estimate the necessary cancellation current reference for use in an active power filter (APF) under transient conditions. An artificial neural network (ANN) based predictor directly calculates the mean DQ-axis currents without filtering. The technique is applied to experimental data and compared against conventional cancellation reference calculation techniques.