Current regulation for a series active filter integrated with a diode rectifier

This paper deals with digital control of a series active filter integrated with a diode rectifier where the series active filter is controlled to function as a current source. A predictive current regulator is considered for the series active filter to achieve good ripple characteristics and predictable switching losses. The operating conditions, and the effect there of on the current regulator are considered and oversampling and prediction of the load voltage is suggested to improve the active filtering performance without increasing the switching frequency.