Simple method of predictive current control

In order to improve the current tracking performance of APF(Active Power Filter),a simple predictive current control method is proposed,which predicts the current reference of next sampling instant at current sampling period,calculates the voltage reference of next sampling instant for APF,and then obtains the corresponding switching signals by voltage space vector modulation to realize current tracking control.In stationary state it uses data collected in previous period to predict next current reference while in transient state it uses two-order extrapolation,which eliminates the delay caused by sampling and calculation and effectively lowers the switching frequency,with high voltage utilization factor,low switching loss and fast dynamic response.Simulation results show the proposed method is valid and feasible.