Four-branch Star Neutral Current Hybrid Power Filter and Var Compensator
Location: USA
Publication date: 2010-09-16
Published in: IEEE Energy Conversion Congress and Exposition 2010, Atlanta (USA) -ECCE 2010
ref. DOI: 10.1109/ECCE.2010.5617796

Local members

Alvaro Luna

PhD. Senior Researcher.

Joan Rocabert

PhD. Senior Researcher

Jose Ignacio Candela

PhD. Senior Researcher. Project Responsible

External members

Teodorescu, R., Blaabjerg, F



This paper presents a solution for filtering current harmonics in three-phase four-wire networks based on the usage of a four-branch star (FBS) filter topology. The specific layout of single-phase inductors and capacitors in this filter topology allows achieving a power filter with two independent and simultaneous resonance frequencies, i.e., one for positive-/negative-sequence and another one for zero-sequence components. The FBS filter topology can work either as a passive filter, or as a hybrid filter, when its performance is improved by integrating a powerconverter into its structure. The paper analyzes the FBS topology and derives fundamental concepts about the control of a generic FBS hybrid power filter. From this analysis, a neutralcurrent hybrid power filter and var compensator is presented as an illustrative example applying the FBS filtering topology to a three-phase four-wire system. An evaluation using simulation and experimental results is conducted as well.


Associated projects

National public