Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks
Common overcurrent criteria used to detect phase-to-phase short circuits in medium-voltage (MV) networks in some cases do not bring the expected results. In particular, this applies to instantaneous overcurrent protections in lines with variable ranges and lines leading to local power plants (LPP),...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/17/2/505 |
| _version_ | 1797344085278720000 |
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| author | Beata Zięba Bartosz Olejnik Iwona Grobelna |
| author_facet | Beata Zięba Bartosz Olejnik Iwona Grobelna |
| author_sort | Beata Zięba |
| collection | DOAJ |
| description | Common overcurrent criteria used to detect phase-to-phase short circuits in medium-voltage (MV) networks in some cases do not bring the expected results. In particular, this applies to instantaneous overcurrent protections in lines with variable ranges and lines leading to local power plants (LPP), which generate a short-circuit current slightly greater than the rated current. When using overcurrent protections, there are some problems with ensuring the appropriate sensitivity and selectivity. This article proposes a protection based on impedance measurement against the effects of phase-to-phase short circuits in MV lines. The protection can be used at switchgears and also at protection points (PP) located deep in the network. The under-impedance criterion has a range independent of the value of the short-circuit current, and it can be alternative or complement to classic overcurrent protection. The introduction of these criteria allows the protection range to be independent of the type of short circuit and the short-circuit power on the busbar, and to determine this range more precisely. The under-impedance protection is particularly useful in conditions of a growing number of energy sources deep inside the networks and its automation. The main idea was to develop a uncomplicated characteristic that would ensure the possibility of setting the under-impedance protection by people who are not specialists in the field of distance protections. The characteristics have been optimally developed both in terms of the area of detected impedances and easy implementation, operation, and configuration. |
| first_indexed | 2024-03-08T10:58:12Z |
| format | Article |
| id | doaj.art-73cbf15f674f4fe9823bf5cce324906c |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-08T10:58:12Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-73cbf15f674f4fe9823bf5cce324906c2024-01-26T16:21:54ZengMDPI AGEnergies1996-10732024-01-0117250510.3390/en17020505Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage NetworksBeata Zięba0Bartosz Olejnik1Iwona Grobelna2Institute of Automatic Control, Electronics and Electrical Engineering, University of Zielona Gora, 65-516 Zielona Gora, PolandFaculty of Environmental Engineering and Energy, Institute of Electric Power Engineering, Poznan University of Technology, 60-965 Poznan, PolandInstitute of Automatic Control, Electronics and Electrical Engineering, University of Zielona Gora, 65-516 Zielona Gora, PolandCommon overcurrent criteria used to detect phase-to-phase short circuits in medium-voltage (MV) networks in some cases do not bring the expected results. In particular, this applies to instantaneous overcurrent protections in lines with variable ranges and lines leading to local power plants (LPP), which generate a short-circuit current slightly greater than the rated current. When using overcurrent protections, there are some problems with ensuring the appropriate sensitivity and selectivity. This article proposes a protection based on impedance measurement against the effects of phase-to-phase short circuits in MV lines. The protection can be used at switchgears and also at protection points (PP) located deep in the network. The under-impedance criterion has a range independent of the value of the short-circuit current, and it can be alternative or complement to classic overcurrent protection. The introduction of these criteria allows the protection range to be independent of the type of short circuit and the short-circuit power on the busbar, and to determine this range more precisely. The under-impedance protection is particularly useful in conditions of a growing number of energy sources deep inside the networks and its automation. The main idea was to develop a uncomplicated characteristic that would ensure the possibility of setting the under-impedance protection by people who are not specialists in the field of distance protections. The characteristics have been optimally developed both in terms of the area of detected impedances and easy implementation, operation, and configuration.https://www.mdpi.com/1996-1073/17/2/505under-impedance protectionphase-to-phase short circuitsmedium-voltage networksovercurrent protection |
| spellingShingle | Beata Zięba Bartosz Olejnik Iwona Grobelna Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks Energies under-impedance protection phase-to-phase short circuits medium-voltage networks overcurrent protection |
| title | Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks |
| title_full | Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks |
| title_fullStr | Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks |
| title_full_unstemmed | Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks |
| title_short | Application of Under-Impedance Criterion to Protect against Effects of Phase-to-Phase Short Circuits in Medium-Voltage Networks |
| title_sort | application of under impedance criterion to protect against effects of phase to phase short circuits in medium voltage networks |
| topic | under-impedance protection phase-to-phase short circuits medium-voltage networks overcurrent protection |
| url | https://www.mdpi.com/1996-1073/17/2/505 |
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