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Flexible active compensation based on load conformity factors applied to non-sinusoidal and asymmetrical voltage conditions


Danilo I.

Helmo K.M. Parades

Alessando Costabeber

Fernando P.


This study proposes a flexible active power filter (APF) controller operating selectively to satisfy a set of desired load performance indices defined at the source side. The definition of such indices, and of the corresponding current references, is based on the orthogonal instantaneous current decomposition and conformity factors provided by the conservative power theory. This flexible approach can be applied to single- or three-phase APFs or other grid-tied converters, as those interfacing distributed generators in smart grids. The current controller is based on a modified hybrid P-type iterative learning controller which has shown good steady-state and dynamic performances. To validate the proposed approach, a three-phase four-wire APF connected to a non-linear and unbalanced load has been considered. Experimental results have been generated under ideal and non-ideal voltage sources, showing the effectiveness of the proposed flexible compensation scheme, even for weak grid scenarios.


Brandão, D. I., Parades, H. K., Costabeber, A., & Marafão, F. P. (2016). Flexible active compensation based on load conformity factors applied to non-sinusoidal and asymmetrical voltage conditions. IET Power Electronics, 9(2), 356-364.

Journal Article Type Article
Acceptance Date Jul 4, 2015
Publication Date Feb 10, 2016
Deposit Date May 26, 2016
Publicly Available Date May 26, 2016
Journal IET Power Electronics
Electronic ISSN 1755-4543
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 9
Issue 2
Pages 356-364
Keywords Electric current control; Iterative learning control; Power convertors; Power filters; Smart power grids; L
oad conformity factors; Grid-tied converters; Flexible active compensation; Current controller; Conformity factors; Orthogonal instantaneous curre
Public URL
Publisher URL
Additional Information This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library.

Copyright 2016 Institution of Engineering and Technology


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