Control Method for Single-Phase Active Filter Using Universal Smart Power Module (USPM)

This paper proposes a control method for a single-phase active filter composed by universal smart power module (USPM). The USPM is a modularization technology concept that composes various power conversion systems. The USPM is a full-bridge inverter with a wideband controller and filter, and the power converter is constructed by several USPMs depending on an application. The proposed method solves the communication delays between the master and slave controllers owing to distributed control in wireless communications and the interference problem caused by the multiple USPMs connection. The experimental results of the steady-state response showed that the input current THD and the power factor are significantly improved despite there is the communication delays. The higher harmonic current elimination as the active filter was possible, and the effectiveness of the proposed method was confirmed.