Pregled bibliografske jedinice broj: 1126697
Earth-fault detection and localization in isolated industrial MV network – comparison of directional overcurrent protection and signal injection method
Earth-fault detection and localization in isolated industrial MV network – comparison of directional overcurrent protection and signal injection method // Electric power systems research, 197 (2021), 1-7 doi:10.1016/j.epsr.2021.107313 (međunarodna recenzija, članak, znanstveni)
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Naslov
Earth-fault detection and localization in
isolated industrial MV network – comparison of
directional overcurrent protection and signal
injection method
Autori
Stipetić, Nina ; Filipović-Grčić, Božidar ; Uglešić, Ivo ; Xemard, Alain ; Andres, Naum
Izvornik
Electric power systems research (0378-7796) 197
(2021);
1-7
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Isolated network ; Earth-fault ; Directional earth-fault protection ; Low-frequency signal injection
Sažetak
Neutral earthing directly affects systems’ behaviour regarding the maximum level of earth- fault current and overvoltages. Isolated neutral is used where continuity of power supply is essential, which is often the case in industrial power utilities. Although the system can remain in service during a single-phase earth-fault, locating the fault should be done as quickly as possible, without disrupting the operation of the loads. Directional earth-fault protection (67N) can be used to indicate the faulty feeder. An alternative method is low- frequency (LF) current injection combined with sensors for detecting the injected signal, which is a known technique used in LV systems. In this paper, the application of 67N protection and the LF current injection method are tested on the same MV system with inaccessible neutral point. Inductive voltage transformers (IVTs) are used for signal injection. Both methods are discussed, and their limitations are compared based on simulation results obtained using the model of an isolated MV industrial plant. The model includes relay protection devices and IVTs for signal injection.
Izvorni jezik
Engleski
Znanstvena područja
Elektrotehnika
Napomena
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POVEZANOST RADA
Ustanove:
Fakultet elektrotehnike i računarstva, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
