Abstract
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. This filter topology can work either as a passive filter, when only passive components are employed, or as a hybrid filter, when its behavior is improved by integrating a power converter into the filter structure. The paper analyzes the proposed topology, and derives fundamental concepts about the control of the resulting hybrid power filter. From this analysis, a specific implementation of a three-phase four-wire hybrid power filter is presented as an illustrative application of the filtering topology. An extensive evaluation using simulation and experimental results from a DSP-based laboratory prototype is conducted in order to verify and validate the good performance achieved by the proposed FBS passive/hybrid power filter.
Original language | English |
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Journal | IEEE Transactions on Power Electronics |
Volume | 24 |
Issue number | 8 |
Pages (from-to) | 1939-1950 |
Number of pages | 12 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- Active power filters
- Hybrid power filters
- Passive power filters
- Power line filters
- Power system harmonics
- Reactive power control