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Benchmark of high-power STATCOM topologies for flicker compensation
KTH, School of Electrical Engineering (EES), Electric power and energy systems.
KTH, School of Electrical Engineering (EES), Electric power and energy systems.
KTH, School of Electrical Engineering (EES), Electric power and energy systems.ORCID iD: 0000-0002-8565-4753
KTH, School of Electrical Engineering (EES), Electric power and energy systems.ORCID iD: 0000-0002-1755-1365
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2016 (English)In: 2016 18TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'16 ECCE EUROPE), IEEE, 2016Conference paper (Refereed)
Abstract [en]

The current from an electrical arc furnace (EAF) in a steel plant is highly unsymmetrical, i.e. it comprises a large amount of negative sequence. This causes problems with the voltage stability in the capacitor submodules for a static synchronous compensator (STATCOM), when implemented using the modular multilevel converter (M2C) concept. In order to counteract the uncontrollability of the capacitor voltage, a common practice is to circulate a zero-sequence fundamental current or a direct current. The method brings the benefit of re-balancing the active power among the individual phases while it requires over-rating of the valve current or dc voltage of the STATCOM. This would in practice give a more expensive design. This paper presents a benchmark of various M2C-based STATCOM designs considering the valve overrating. The STATCOM topologies will be benchmarked with the EAF modeled for all possible combinations of positive-and negative-sequence current. The rating comparison considering the dc capacitor ripple and zero-sequence harmonic injection are discussed.

Place, publisher, year, edition, pages
IEEE, 2016.
Series
, European Conference on Power Electronics and Applications, ISSN 2325-0313
Keyword [en]
Static Synchronous Compensator (STATCOM), Multilevel Converters
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-197014DOI: 10.1109/EPE.2016.7695478ISI: 000386637300227ScopusID: 2-s2.0-84996791605OAI: oai:DiVA.org:kth-197014DiVA: diva2:1054945
Conference
18th European Conference on Power Electronics and Applications (EPE), SEP 05-09, 2016, GERMANY
Note

QC 20161209

Available from: 2016-12-09 Created: 2016-11-28 Last updated: 2016-12-09Bibliographically approved

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Zhang, HongyangNorrga, StaffanNee, Hans-PeterÖstlund, Stefan
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