Computation of time delay margins for stability of a single-area load frequency control system with communication delays

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dc.contributor.authorSönmez, Şahin
dc.contributor.authorAyasun, Saffet
dc.contributor.authorEminoğlu, U.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2014
dc.departmentNiğde ÖHÜ, Mühendislik Fakültesi, Elektrik Elektronik Mühendisliği Bölümü
dc.description.abstractTime delays have become unavoidable in power systems since communication links are extensively used for sending and receiving control signals. This paper investigates the effect of time delays on the stability of a single-area load Frequency Control (LFC) system. A direct and exact method to compute delay margins is presented. The delay margin is the maximum amount of the time delay that the system can tolerate before it becomes unstable for a given operating point. The proposed method starts with the determination of all possible purely imaginary characteristic roots for any positive time delay. To achieve this, Rekasius substitution is first used to convert the transcendental characteristic equation of the LFC system into a polynomial. Then, Routh stability criterion is applied to determine the critical root, the corresponding oscillation frequency and the delay margin for stability. For a wide range of controller gains, delay margins of LFC system are determined to find out the qualitative effect of controller gains on the delay margin. Finally, theoretical delay margin results are verified by using the time-domain simulation capabilities of Matlab/Simulink.
dc.identifier.endpage76
dc.identifier.issn1790-5060
dc.identifier.scopus2-s2.0-84897005939
dc.identifier.scopusqualityQ2
dc.identifier.startpage67
dc.identifier.urihttps://hdl.handle.net/11480/733
dc.identifier.volume9
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherWorld Scientific and Engineering Academy and Society
dc.relation.ispartofWSEAS Transactions on Power Systems
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDelay Margin
dc.subjectLoad Frequency Control System
dc.subjectStability
dc.subjectTime delay
dc.titleComputation of time delay margins for stability of a single-area load frequency control system with communication delays
dc.typeArticle

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