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Title:Preizkušanje delovanja rezervnih zaščitnih con distančne zaščite z uporabo digitalnega simulatorja v realnem času : magistrsko delo
Authors:ID Černelč, Žan (Author)
ID Polajžer, Boštjan (Mentor) More about this mentor... New window
ID Černelič, Jernej (Comentor)
Files:.pdf MAG_Cernelc_Zan_2025.pdf (10,03 MB)
MD5: A0741A316BBE7D343E4C27637951E80C
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:V magistrskem delu so podane ugotovitve preizkušanj distančne zaščite v preprostem omrežju, sestavljenem iz dveh daljnovodov in treh tujih omrežij. Uporabljena sta dva numerična zaščitna releja Siemens 7SD5, ustrezni ojačevalniki, digitalni simulator NovaCor in programsko okolje RSCAD FX. Vsi preizkusi so bili izvedeni v realnem času in v zaprti zanki za dva nabora nastavitev obeh zaščitnih relejev. Ugotovljeno je bilo, da bremensko področje za karakteristike pri enofaznih okvarah ni potrebno, s čimer se izboljša občutljivost zaščite pri enofaznih okvarah. Rezultati preizkušanja so pokazali, da lahko dodatno izboljšamo občutljivost zaščite tudi s povečanjem dosega tretje in četrte zaščitne cone. Poleg tega smo s preizkusi potrdili teoretična dognanja, da vmesno napajanje pri okvarah na sosednjem vodu poveča pogrešek izmerjene impedance, pri bolj oddaljenih okvarah pa se zaščita niti ne vzbudi. Rezultati potrjujejo, da je z ustreznim pristopom mogoče zmanjšati tveganje za napačno zaznavo okvare ali neželeno delovanje zaščite, kar prispeva k večji stabilnosti in zanesljivosti elektroenergetskega sistema.
Keywords:distančna zaščita, rezervne zaščitne cone, digitalni simulator v realnem času, preizkušanje opreme v zaprti zanki.
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[Ž. Černelč]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (XIII, 74 str.))
PID:20.500.12556/DKUM-94490 New window
UDC:621.31(043.2)
COBISS.SI-ID:260174339 New window
Publication date in DKUM:22.10.2025
Views:161
Downloads:27
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:19.08.2025

Secondary language

Language:English
Title:Testing the operation of distance protection backup zones using a real-time digital simulator
Abstract:This master's thesis presents the findings of distance protection testing in a simple network consisting of two transmission lines and three external power supplies. Two numerical protection relays Siemens 7SD5, appropriate amplifiers, digital simulator NovaCor, and software environment RSCAD FX were used. All tests were performed in real time, using a closed-loop configuration for two sets of settings for both protection relays. It was found that the load encroachment for single-phase fault characteristics is unnecessary, which improves the sensitivity of protection in case of single-phase faults. The test results showed that the sensitivity of protection can be further improved by increasing the range of the third and fourth protection zones. In addition, the testing confirmed the theoretical findings that an intermediate power supply in the event of faults on the adjacent line increases the measured impedance error, while in the case of more distant faults, the protection does not even pick up. The results confirm that the appropriate approach can reduce the risk of false fault detection or unwanted protection trips, contributing to greater stability and reliability of the power system.
Keywords:distance protection, backup protection zones, real-time digital simulator, hardware-in-the-loop testing.


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