Current Harmonics Cancellation in Three-Phase Four-Wire Systems by Using a Four-Branch Star Filtering Topology

This paper presents a new solution for filtering current
\nharmonics in three-phase four-wire networks. The original
\nfour-branch star (FBS) filter topology presented in this paper is
\ncharacterized by a particular layout of single-phase inductances
\nand capacitors, without using any transformer or special electromagnetic
\ndevice. Via this layout, a power filter, with two different
\nand simultaneous resonance frequencies and sequences, is
\nachieved—one frequency for positive-/negative-sequence and another
\none for zero-sequence components.