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dc.contributor.author
Elahidoost, Atousa
dc.contributor.author
Furieri, Luca
dc.contributor.author
Kamgarpour, Maryam
dc.contributor.author
Tedeschi, Elisabetta
dc.date.accessioned
2021-07-30T12:45:09Z
dc.date.available
2021-07-30T02:31:30Z
dc.date.available
2021-07-30T12:45:09Z
dc.date.issued
2021
dc.identifier.issn
2169-3536
dc.identifier.other
10.1109/ACCESS.2021.3096291
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/498476
dc.identifier.doi
10.3929/ethz-b-000498476
dc.description.abstract
The paper aims at minimizing DC voltage oscillations in offshore multiterminal high-voltage direct current (HVDC) grids based on modular multilevel converters (MMCs). The DC voltage stability is a crucial factor in multiterminal HVDC networks since it is associated with the grid power balance. Furthermore, DC voltage oscillations can cause the propagation of significant disturbances to the interconnected AC grids. This paper proposes an optimal control technique based on semidefinite programming to improve the DC voltage stability margins under the worst-case perturbation scenario. A centralized optimal linear feedback controller is introduced to achieve this goal while ensuring compliance with the control inputs’ and state variables’ constraints. Furthermore, the methodology is adapted to develop a decentralized optimal linear feedback controller with naturally decoupled constraints on the control inputs and state variables. It is shown that the proposed centralized and decentralized optimal linear controllers can minimize the DC voltage oscillations under the worst-case perturbation scenario in the presence or absence of the droop control gain. The performance of these controllers is verified via eigenvalue stability analysis and time-domain simulations of the MMC-based four-terminal HVDC test grid. Finally, a DC voltage oscillation index is introduced as a potential decision-support criterion. Its applicability is exemplified by identifying, among several options, the HVDC link that gives minimum DC voltage oscillations between independent point-to-point networks while considering the wind intermittency effect.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
IEEE
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
DC voltage oscillations
en_US
dc.subject
Modular Multilevel Converter Control
en_US
dc.subject
Offshore multiterminal HVDC grid
en_US
dc.subject
Centralized and decentralized optimal linear feedback controller
en_US
dc.title
Optimal Linear Controller for Minimizing DC Voltage Oscillations in MMC-Based Offshore Multiterminal HVDC Grids
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2021-07-12
ethz.journal.title
IEEE Access
ethz.journal.volume
9
en_US
ethz.pages.start
98731
en_US
ethz.pages.end
98745
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
New York, NY
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2021-07-30T02:31:47Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-07-30T12:45:15Z
ethz.rosetta.lastUpdated
2022-03-29T10:50:29Z
ethz.rosetta.versionExported
true
ethz.COinS
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