Computation method for analysis of sliding faults in power systems
Short-circuit analysis is conducted based on the nodal impedance matrix, which is the inversion of the nodal admittance matrix. If analysis is conducted for sliding faults, then for each fault location four elements of the nodal admittance matrix are subject to changes and the calculation of the adm...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences
2021-01-01
|
| Series: | Bulletin of the Polish Academy of Sciences: Technical Sciences |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/118763/PDF/08_01933_Bpast.No.69(1)_27.01.21_K2_A.pdf |
| _version_ | 1811344004558618624 |
|---|---|
| author | Jan Machowski Sylwester Robak |
| author_facet | Jan Machowski Sylwester Robak |
| author_sort | Jan Machowski |
| collection | DOAJ |
| description | Short-circuit analysis is conducted based on the nodal impedance matrix, which is the inversion of the nodal admittance matrix. If analysis is conducted for sliding faults, then for each fault location four elements of the nodal admittance matrix are subject to changes and the calculation of the admittance matrix inversion needs to be repeated many times. For large-scale networks such an approach is time consuming and unsatisfactory. This paper proves that for each new fault location a new impedance matrix can be found without recalculation of the matrix inversion. It can be found by a simple extension of the initial nodal impedance matrix calculated once for the input model of the network. This paper derives formulas suitable for such an extension and presents a flowchart of the computational method. Numerical tests performed for a test power system confirm the validity and usefulness of the proposed method. |
| first_indexed | 2024-04-13T19:40:11Z |
| format | Article |
| id | doaj.art-5f9de1fa903c4cdaa994423e40d4f1a1 |
| institution | Directory Open Access Journal |
| issn | 2300-1917 |
| language | English |
| last_indexed | 2024-04-13T19:40:11Z |
| publishDate | 2021-01-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Bulletin of the Polish Academy of Sciences: Technical Sciences |
| spelling | doaj.art-5f9de1fa903c4cdaa994423e40d4f1a12022-12-22T02:32:55ZengPolish Academy of SciencesBulletin of the Polish Academy of Sciences: Technical Sciences2300-19172021-01-0169No. 1https://doi.org/10.24425/bpasts.2021.135841Computation method for analysis of sliding faults in power systemsJan Machowski0https://orcid.org/0000-0002-3132-4441Sylwester Robak1https://orcid.org/0000-0003-1324-4242Electrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, ul. Koszykowa 75, 00-662 Warsaw, PolandElectrical Power Engineering Institute, Faculty of Electrical Engineering, Warsaw University of Technology, ul. Koszykowa 75, 00-662 Warsaw, PolandShort-circuit analysis is conducted based on the nodal impedance matrix, which is the inversion of the nodal admittance matrix. If analysis is conducted for sliding faults, then for each fault location four elements of the nodal admittance matrix are subject to changes and the calculation of the admittance matrix inversion needs to be repeated many times. For large-scale networks such an approach is time consuming and unsatisfactory. This paper proves that for each new fault location a new impedance matrix can be found without recalculation of the matrix inversion. It can be found by a simple extension of the initial nodal impedance matrix calculated once for the input model of the network. This paper derives formulas suitable for such an extension and presents a flowchart of the computational method. Numerical tests performed for a test power system confirm the validity and usefulness of the proposed method.https://journals.pan.pl/Content/118763/PDF/08_01933_Bpast.No.69(1)_27.01.21_K2_A.pdfpower systemshort-circuit analysissliding faultscomputation methods |
| spellingShingle | Jan Machowski Sylwester Robak Computation method for analysis of sliding faults in power systems Bulletin of the Polish Academy of Sciences: Technical Sciences power system short-circuit analysis sliding faults computation methods |
| title | Computation method for analysis of sliding faults in power systems |
| title_full | Computation method for analysis of sliding faults in power systems |
| title_fullStr | Computation method for analysis of sliding faults in power systems |
| title_full_unstemmed | Computation method for analysis of sliding faults in power systems |
| title_short | Computation method for analysis of sliding faults in power systems |
| title_sort | computation method for analysis of sliding faults in power systems |
| topic | power system short-circuit analysis sliding faults computation methods |
| url | https://journals.pan.pl/Content/118763/PDF/08_01933_Bpast.No.69(1)_27.01.21_K2_A.pdf |
| work_keys_str_mv | AT janmachowski computationmethodforanalysisofslidingfaultsinpowersystems AT sylwesterrobak computationmethodforanalysisofslidingfaultsinpowersystems |