A Deadbeat Controller Design for Single-Phase Active Power Filters Based on Forward-Backward Discretization

Abstract

Nowadays, due to availability of powerful signal processors, the digital control approaches, such as deadbeat control, have received considerable attentions. The deadbeat controller offers critical advantages, such as constant switching frequency, fast dynamic response, and low settling time. Nevertheless, the parameter dependency of the deadbeat controller has always been questioned. In this regard, this paper proposes a forward-backward discretization method for a single-phase active power filter to be used for deadbeat controller design. This procedure offers high accuracy in modeling and at the same time simplicity in designing the deadbeat controller. The proposed discretization approach reduces the required two forward steps prediction down to only a step. The superiority of the developed controller is then confirmed through extensive simulations.