Shunt active power filter with dynamic output current limitation

• Author(s): Pregitzer, Ricardo G. ; Pinto, J. G. ; Monteiro, Luís F. C. ; Afonso, João L.
• Date: 2007
• Persistent ID: http://hdl.handle.net/1822/7680
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Active power filter; Computer simulations; Digital signal processing; Instantaneous power theory; Power quality
• Document Type: Conference Object
• Language: English

Description

This paper presents a shunt active filter with a controller able to dynamically limit the output current, which allows an effective protection of the inverter semiconductors without diminishing the active filter performance. The control strategy is based on the p-q theory expanded for three-phase four-wire systems and the power stage of the active filter is composed by a two-level four-leg inverter. Simulation results on PSCAD/EMTDC trade are presented to demonstrate the performance of the dynamic current limitation.