Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/1/195 |
| _version_ | 1797499609976668160 |
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| author | Jožef Ritonja Boštjan Polajžer |
| author_facet | Jožef Ritonja Boštjan Polajžer |
| author_sort | Jožef Ritonja |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T03:49:52Z |
| format | Article |
| id | doaj.art-0129de9251e74afa8e799ac812a1bb57 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:49:52Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0129de9251e74afa8e799ac812a1bb572023-11-23T11:09:11ZengMDPI AGApplied Sciences2076-34172021-12-0112119510.3390/app12010195Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power SystemsJožef Ritonja0Boštjan Polajžer1Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, SloveniaFaculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, SloveniaNew 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.https://www.mdpi.com/2076-3417/12/1/195power systemsynchronous generatorsoscillationslocal modeseigenvalue analysis |
| spellingShingle | Jožef Ritonja Boštjan Polajžer Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems Applied Sciences power system synchronous generators oscillations local modes eigenvalue analysis |
| title | Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems |
| title_full | Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems |
| title_fullStr | Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems |
| title_full_unstemmed | Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems |
| title_short | Analysis of Synchronous Generators’ Local Mode Eigenvalues in Modern Power Systems |
| title_sort | analysis of synchronous generators local mode eigenvalues in modern power systems |
| topic | power system synchronous generators oscillations local modes eigenvalue analysis |
| url | https://www.mdpi.com/2076-3417/12/1/195 |
| work_keys_str_mv | AT jozefritonja analysisofsynchronousgeneratorslocalmodeeigenvaluesinmodernpowersystems AT bostjanpolajzer analysisofsynchronousgeneratorslocalmodeeigenvaluesinmodernpowersystems |