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Design of a linear time-varying Model Predictive Control energy regulator for grid-tied VSCs

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Title: Design of a linear time-varying Model Predictive Control energy regulator for grid-tied VSCs
Authors: Rodriguez Bernuz, JM
McInerney, I
Junyent Ferre, A
Kerrigan, E
Item Type: Journal Article
Abstract: This paper presents an energy regulator based on a Model Predictive Control (MPC) algorithm for a Voltage Source Converter (VSC). The MPC is formulated to optimise the converter performance according to the weights defined in an objective function that trades off additional features, such as current harmonic distortion, reactive power tracking and DC bus voltage oscillation. Differently from most approaches found in the research literature, the MPC proposed here considers the coupling dynamics between the AC and DC sides of the VSC. This study is focused on the example case of a single-phase VSC, which presents a nonlinear relationship between its AC and DC sides and a sustained double-line frequency power disturbance in its DC bus. To reduce the burden of the MPC, the controller is formulated to benefit from the slow energy dynamics of the system. Thus, the cascaded structure typically used in the control of VSCs is kept and the MPC is set as an energy regulator at a reduced sampling frequency while the current control relies on a fast inner controller. The computational burden of the algorithm is further reduced by using a linear time-varying approximation. The controller is presented in detail and experimental validation showing the performance of the algorithm is provided.
Issue Date: Jun-2021
Date of Acceptance: 3-Feb-2021
URI: http://hdl.handle.net/10044/1/87773
DOI: 10.1109/TEC.2021.3060319
ISSN: 0885-8969
Publisher: Institute of Electrical and Electronics Engineers
Start Page: 1425
End Page: 1434
Journal / Book Title: IEEE Transactions on Energy Conversion
Volume: 36
Issue: 2
Copyright Statement: © 2021 The Authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. For more information, see https://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/R030235/1
Keywords: 0906 Electrical and Electronic Engineering
Electrical & Electronic Engineering
Publication Status: Published
Online Publication Date: 2021-02-18
Appears in Collections:Electrical and Electronic Engineering
Faculty of Engineering

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