A robust deadbeat current control method by using adaptive predictor for single-phase voltage source active power filter

This paper deals with a deadbeat current control implementation of voltage source shunt-type single-phase active power filter (APF). Although the one-dimensional deadbeat control method can attain time-optimal responses of APF compensating current, one sampling period is actually required for its settling time. To cancel such a delay and one more delay caused by DSP execution time, the desired APF compensating current has to be predicted two sampling periods ahead. In the prediction process, an adaptive predictor is newly introduced herein to predict the control error of two sampling periods ahead. The experimental results obtained from a DSP controlled APF are also illustrated.