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On small signal stability of an AC/DC power system with a hybrid MTDC network
KTH, School of Electrical Engineering (EES), Electric power and energy systems. KTH. (PSOC)
KTH, School of Electrical Engineering (EES), Electric power and energy systems. (PSOC)ORCID iD: 0000-0002-6431-9104
Svenska Kraftnät.
UOIT.
2016 (English)In: Electric power systems research, ISSN 0378-7796, E-ISSN 1873-2046, Vol. 136Article in journal (Refereed) Published
Abstract [en]

Multi-terminal HVDC (MTDC) networks are being contemplated for large scale integration of renewable energy sources, as well as for the interconnection of asynchronous AC systems. A hybrid MTDC network that combines line commutated converters (LCCs) and voltage source converters (VSCs) can combine the benefits of both technologies. This paper presents a mathematical model of an AC/DC power system with an embedded hybrid MTDC network interconnection. Small signal stability analysis of the power system is conducted based on the linearization of the model. The impact of VSC controller gains on the dominant modes in the system is investigated. The contributions of the converters and generators to different modes of the system are investigated based on the participation matrix analysis. Auxiliary controllers are applied at the converters for the purpose of damping power oscillations in case of disturbances. The results of small signal stability analysis are validated by time-domain simulations in MATLAB.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 136
Keyword [en]
AC/DC power system, Hybrid MTDC, LCC, Small signal stability, VSC
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-184484DOI: 10.1016/j.epsr.2016.02.004ISI: 000375505800009ScopusID: 2-s2.0-84959010522OAI: oai:DiVA.org:kth-184484DiVA: diva2:916089
Note

QC 20160407

Available from: 2016-03-31 Created: 2016-03-31 Last updated: 2016-06-09Bibliographically approved

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