Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks
Abstract Earth faults is a challenging fault type to locate in resonant grounded networks due to their naturally low fault current, and the problem increases with an increased fault impedance. This paper describes the detailed implementation and laboratory testing of a method for detection, location...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-12-01
|
| Series: | IET Generation, Transmission & Distribution |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/gtd2.13059 |
| _version_ | 1797384263943847936 |
|---|---|
| author | Thomas Treider Hans Kristian Høidalen |
| author_facet | Thomas Treider Hans Kristian Høidalen |
| author_sort | Thomas Treider |
| collection | DOAJ |
| description | Abstract Earth faults is a challenging fault type to locate in resonant grounded networks due to their naturally low fault current, and the problem increases with an increased fault impedance. This paper describes the detailed implementation and laboratory testing of a method for detection, location and clearing of earth faults with very small fault currents. The method consists of two indicators used in the fault detection stage, where their simultaneous operation ensures selective fault detection and faulty feeder selection. One of these indicators also enables continuous fault indication throughout a sectionalizing process. The laboratory tests demonstrate that both indicators function as intended, and it is the current sensors which ultimately limit the attainable sensitivity. Faults up to 15 kΩ were detected successfully in the laboratory network based on phase current measurements, while the sectionalizing indicator showed much higher sensitivity and functioned as intended in a 50 kΩ fault. Measurements from one field test in a 22 kV network corroborate the laboratory results and demonstrate the expected earth fault indicator response. |
| first_indexed | 2024-03-08T21:32:56Z |
| format | Article |
| id | doaj.art-2c90ba7a37de4bd59ef29d5ed4c27db7 |
| institution | Directory Open Access Journal |
| issn | 1751-8687 1751-8695 |
| language | English |
| last_indexed | 2024-03-08T21:32:56Z |
| publishDate | 2023-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Generation, Transmission & Distribution |
| spelling | doaj.art-2c90ba7a37de4bd59ef29d5ed4c27db72023-12-21T04:27:03ZengWileyIET Generation, Transmission & Distribution1751-86871751-86952023-12-0117245446545710.1049/gtd2.13059Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networksThomas Treider0Hans Kristian Høidalen1Department of Electric Energy Norwegian University of Science and Technology Trondheim NorwayDepartment of Electric Energy Norwegian University of Science and Technology Trondheim NorwayAbstract Earth faults is a challenging fault type to locate in resonant grounded networks due to their naturally low fault current, and the problem increases with an increased fault impedance. This paper describes the detailed implementation and laboratory testing of a method for detection, location and clearing of earth faults with very small fault currents. The method consists of two indicators used in the fault detection stage, where their simultaneous operation ensures selective fault detection and faulty feeder selection. One of these indicators also enables continuous fault indication throughout a sectionalizing process. The laboratory tests demonstrate that both indicators function as intended, and it is the current sensors which ultimately limit the attainable sensitivity. Faults up to 15 kΩ were detected successfully in the laboratory network based on phase current measurements, while the sectionalizing indicator showed much higher sensitivity and functioned as intended in a 50 kΩ fault. Measurements from one field test in a 22 kV network corroborate the laboratory results and demonstrate the expected earth fault indicator response.https://doi.org/10.1049/gtd2.13059distribution networksfault locationpower system faultspower system protection |
| spellingShingle | Thomas Treider Hans Kristian Høidalen Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks IET Generation, Transmission & Distribution distribution networks fault location power system faults power system protection |
| title | Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks |
| title_full | Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks |
| title_fullStr | Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks |
| title_full_unstemmed | Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks |
| title_short | Implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low‐current earth faults in resonant grounded networks |
| title_sort | implementation and laboratory verification of method utilizing phase and neutral quantities for detection and location of low current earth faults in resonant grounded networks |
| topic | distribution networks fault location power system faults power system protection |
| url | https://doi.org/10.1049/gtd2.13059 |
| work_keys_str_mv | AT thomastreider implementationandlaboratoryverificationofmethodutilizingphaseandneutralquantitiesfordetectionandlocationoflowcurrentearthfaultsinresonantgroundednetworks AT hanskristianhøidalen implementationandlaboratoryverificationofmethodutilizingphaseandneutralquantitiesfordetectionandlocationoflowcurrentearthfaultsinresonantgroundednetworks |