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

Brandão, Danilo I. and Parades, Helmo K.M. and Costabeber, Alessando and Marafão, Fernando P. (2016) Flexible active compensation based on load conformity factors applied to non-sinusoidal and asymmetrical voltage conditions. IET Power Electronics, 9 (2). pp. 356-364. ISSN 1755-4543

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Abstract

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.

Item Type: Article
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
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 current decomposition; Active power filter controller; Asymmetrical voltage conditions; Nonsinusoidal conditions; Smart grids; APF controller; Modified hybrid P-type iterative learning controller Current control; Self-adjusting control systems; Interpolation and function approximation (numerical analysis); Power convertors and power supplies to apparatus; Control of electric power systems; Other power apparatus and electric machines; Interpolation and function approximation (numerical analysis)
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: https://doi.org/10.1049/iet-pel.2015.0086
Depositing User: Burns, Rebecca
Date Deposited: 26 May 2016 14:22
Last Modified: 14 Sep 2016 12:32
URI: http://eprints.nottingham.ac.uk/id/eprint/33564

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