| Title: | Analysis of synchronous generators’ local mode eigenvalues in modern power systems |
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| Authors: | ID Ritonja, Jožef (Author)
ID Polajžer, Boštjan (Author) |
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| Files: |  applsci-12-00195-v2.pdf (4,17 MB)
MD5: 2F9EC6444B091643870D36479E23EA80
 https://www.mdpi.com/2076-3417/12/1/195
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FERI - Faculty of Electrical Engineering and Computer Science
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| Abstract: | New energy sources, storage facilities, power electronics devices, advanced and complex
control concepts, economic operating doctrines, and cost-optimized construction and production of
machines and equipment in power systems adversely affect small-signal stability associated with local
oscillations. The objective of the article is to analyze local oscillations and the causes that affect them in
order to reduce their negative impact. There are no recognized analyses of the oscillations of modern
operating synchronous generators exposed to new conditions in power systems. The basic idea is to
perform a numerical analysis of local oscillations of a large number of synchronous generators in
the power system. The paper represents the local mode data obtained from a systematic analysis of
synchronous generators in the Slovenian power system. Analyzed were 74 synchronous generators
of the Slovenian power system, plus many additional synchronous generators for which data were
accessible in references. The mathematical models convenient for the study of local oscillations
are described first in the paper. Next, the influences of transmission lines, size of the synchronous
generators, operating conditions, and control systems were investigated. The paper’s merit is the
applicable rules that have been defined to help power plant operators avoid stability-problematic
situations. Consequently, boundaries were estimated of the eigenvalues of local modes. Finally,
experiments were performed with a laboratory-size synchronous generator to assess the regularity of
the numerically obtained conclusions. The obtained results enable the prediction of local oscillations’
frequencies and dampings and will be useful in PSS planning.
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| Keywords: | power system, synchronous generators, oscillations, local modes, eigenvalue analysis |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 16.10.2021 |
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| Article acceptance date: | 22.12.2021 |
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| Publication date: | 25.12.2021 |
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| Publisher: | MDPI AG |
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| Year of publishing: | 2022 |
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| Number of pages: | 31 str. |
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| Numbering: | Vol. 12, iss. 1 |
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| PID: | 20.500.12556/DKUM-92284  |
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| UDC: | 621.31 |
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| ISSN on article: | 2076-3417 |
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| COBISS.SI-ID: | 92655107 |
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| DOI: | 10.3390/app12010195 |
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| Copyright: | © 2021 by the authors |
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| Publication date in DKUM: | 27.03.2025 |
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| Views: | 252 |
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| Downloads: | 22 |
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| Metadata: |    |
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| Categories: | Misc.
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