Current harmonics cancellation in three-phase four-wire systems by using a four-branch star filtering topology
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This paper presents a new solution for filtering current harmonics in three-phase four-wire networks. The original four-branch star (FBS) filter topology presented in this paper is characterized by a particular layout of single-phase inductances and capacitors, without using any transformer or special electromagnetic device. Via this layout, a power filter, with two different and simultaneous resonance frequencies and sequences, is achieved—one frequency for positive-/negative-sequence and another one for zero-sequence components.
CitacióRodriguez, P. [et al.]. Current harmonics cancellation in three-phase four-wire systems by using a four-branch star filtering topology. "IEEE transactions on power electronics", Agost 2009, vol. 24, núm. 8, p. 1939-1950.