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

Danilo Iglesias Brandao; Helmo Kelis Morales Paredes; Alessandro Costabeber; Fernando Pinhabel Marafão

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

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Author(s): Danilo Iglesias Brandao ¹ ; Helmo Kelis Morales Paredes ² ; Alessandro Costabeber ³ ; Fernando Pinhabel Marafão ²
- Affiliations: 1: Department of Systems and Energy, University of Campinas, Av. Albert Einstein 400, Campinas, Brazil ;
  2: Group of Automation and Integrated Systems, UNESP – Univ. Estadual Paulista, Av. Três de Março 511, Sorocaba, Brazil ;
  3: Department of Electrical and Electronic Engineering, University of Nottingham, NG7 2RD Nottingham, UK
Source: Volume 9, Issue 2, 10 February 2016, p. 356 – 364
DOI: 10.1049/iet-pel.2015.0086 , Print ISSN 1755-4535, Online ISSN 1755-4543

Received 09/02/2015, Accepted 04/07/2015, Revised 19/06/2015, Published 10/02/2016

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.

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

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