Application and analysis of new single step beat control based on grey forecasting and control theory in active power filter

The inherent delay property of APF system is not considered by the deadbeat control within active filter control methods, so it is difficult to realize dynamically real-time tracking and harmonic compensation. The computation of the double-step deadbeat control based on the grey predictive control theory is of complexity and high error risk. Facing up the above shortcomings, a new single step deadbeat control method based on grey predictive theory is presented. With this method the harmonic components' real-time compensation is realized, and the error risk is decreased. The simulation results show the method is effective and excellent.