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Active Power Filter Control Strategy With Implicit Closed-Loop Current Control and Resonant Controller

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5 Author(s)
Angulo, M. ; Power Electron. Lab. (LEP), Pontificia U niversidad Catolica de Valparaiso, Valparaiso, Chile ; Ruiz-Caballero, D.A. ; Lago, J. ; Heldwein, M.L.
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Novel simple indirect control concepts for an active power filter (APF) application are proposed here. The concepts are exemplarily presented to control a modified APF structure. The main advantage over other control strategies is the achieved excellent simplicity-to-performance ratio. The proposed control strategies are based on the concept of virtual impedance emulation to provide high power factor in a system. To validate the operating principle, a single-phase low-power prototype has been built and experimentally tested. This prototype operates at a remarkably low switching frequency of 5 kHz and is digitally controlled by a digital signal processor.

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Industrial Electronics, IEEE Transactions on  (Volume:60 ,  Issue: 7 )