Current harmonics cancellation in three-phase four-wire systems by using a four-branch star filtering topology

摘要

This paper presents a new solution for filtering current\udharmonics in three-phase four-wire networks. The original\udfour-branch star (FBS) filter topology presented in this paper is\udcharacterized by a particular layout of single-phase inductances\udand capacitors, without using any transformer or special electromagnetic\uddevice. Via this layout, a power filter, with two different\udand simultaneous resonance frequencies and sequences, is\udachieved—one frequency for positive-/negative-sequence and another\udone for zero-sequence components.