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Performance and Scalability of Voltage Controllers in Multi-Terminal HVDC Networks
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-1835-2963
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre. KTH Royal Inst Technol, Sch Elect Engn, SE-10044 Stockholm, Sweden.;KTH Royal Inst Technol, ACCESS Linnaeus Ctr, SE-10044 Stockholm, Sweden..ORCID iD: 0000-0001-9940-5929
2017 (English)In: 2017 AMERICAN CONTROL CONFERENCE (ACC), IEEE , 2017, p. 3029-3034Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we compare the transient performance of a multi-terminal high-voltage DC (MTDC) grid equipped with a slack bus for voltage control to that of two distributed control schemes: a standard droop controller and a distributed averaging proportional-integral (DAPI) controller. We evaluate performance in terms of an H-2 metric that quantifies expected deviations from nominal voltages, and show that the transient performance of a droop or DAPI controlled MTDC grid is always superior to that of an MTDC grid with a slack bus. In particular, by studying systems built up over lattice networks, we show that the H-2 norm of a slack bus controlled system may scale unboundedly with network size, while the norm remains uniformly bounded with droop or DAPI control. We simulate the control strategies on radial MTDC networks to demonstrate that the transient performance for the slack bus controlled system deteriorates significantly as the network grows, which is not the case with the distributed control strategies.

Place, publisher, year, edition, pages
IEEE , 2017. p. 3029-3034
Series
Proceedings of the American Control Conference, ISSN 0743-1619
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-225796ISI: 000427033303015ISBN: 978-1-5090-5992-8 OAI: oai:DiVA.org:kth-225796DiVA, id: diva2:1196413
Conference
American Control Conference (ACC), MAY 24-26, 2017, Seattle, WA
Funder
Swedish Foundation for Strategic Research Knut and Alice Wallenberg FoundationSwedish Research Council, 2014-6282 2013-5523
Note

QC 20180410

Available from: 2018-04-10 Created: 2018-04-10 Last updated: 2018-04-10Bibliographically approved

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Sandberg, HenrikJohansson, Karl H.

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