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Title:Hitro omejevanje toka z napravo m-sssc in preizkušanje rezervnih con distančne zaščite z uporabo digitalnega simulatorja v realnem času : magistrsko delo
Authors:ID Najdovski, Stefan (Author)
ID Polajžer, Boštjan (Mentor) More about this mentor... New window
ID Hrovat, Gorazd (Comentor)
Files:.pdf MAG_Najdovski_Stefan_2025.pdf (5,61 MB)
MD5: 4314308D10444905DEE9E56412287DA7
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Magistrska naloga analizira hipotetičen dogodek N-2, tj. izpad dvosistemskega 400-kV daljnovoda Maribor–Kainachtal, ki bi kritično povečal obremenitev obravnavanega 220-kV daljnovoda Podlog–Obersielach. Posledično bi delovala distančna zaščita 220-kV daljnovoda v tretji ali četrti coni. Z namenom preprečevanja delovanja zaščite je raziskava usmerjena v vpeljavo modularnega statičnega sinhronskega serijskega kompenzatorja (m SSSC) na obravnavanem 220-kV daljnovodu. Naprava m-SSSC je namreč tovrstne nepotrebne izklope zmožna preprečiti z aktivacijo funkcije hitrega omejevanja toka. Raziskovalni proces je vključeval modeliranje omrežja, simulacijo dogodka N-2, parametriziranje in analizo odzivov dinamičnega modela naprave m-SSSC ter preizkušanje distančne zaščite v zaprti zanki in realnem času z digitalnim simulatorjem NovaCor. Rezultati simulacij delovanja naprave m-SSSC potrjujejo, da predlagane nastavitve funkcije za hitro omejevanje toka omogočajo hitre in stabilne odzive. Poleg tega rezultati preizkušanja dveh zaščitnih relejev Siemens Siprotec 7SD5 kažejo, da naprava m-SSSC pri obravnavanem dogodku N-2 za smer pretoka Obersielach–Podlog preprečuje nepotrebno delovanje distančne zaščite
Keywords:statični sinhronski serijski kompenzator, preobremenitev daljnovoda, distančna zaščita, digitalni simulator v realnem času, preizkušanje opreme v zaprti zanki.
Publication status:Published
Publication version:Version of Record
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[S. Najdovski]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (XXI, 72 str.))
PID:20.500.12556/DKUM-92375 New window
UDC:621.316.915.45(043.2)
COBISS.SI-ID:236166659 New window
Publication date in DKUM:08.05.2025
Views:276
Downloads:72
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:02.04.2025

Secondary language

Language:English
Title:Fast current override with an m-sssc device and testing distance protection backup zones using a real time digital simulator
Abstract:This master's thesis analyzes a hypothetical N-2 event, i.e. a disconnection of the two system 400 kV transmission line Maribor-Kainachtal that would critically increase the loading of the considered 220 kV transmission line Podlog-Obersielach. As a result, the distance protection of the 220 kV line would operate in the third or fourth zone. To prevent protection from tripping, the research is focused on the implementation of a modular static synchronous series compensator (m-SSSC) on the discussed 220 kV transmission line. The m-SSSC device can prevent such unnecessary outages by activating the current control override (CCO) function. The research process involved grid modeling, an N-2 event simulation, parameterization, and analysis of the m-SSSC dynamic model responses, as well as distance protection closed-loop testing using a NovaCor real-time digital simulator. The results of the simulations of m-SSSC device operation confirm that the proposed settings for CCO enable fast and stable responses. Furthermore, the results of testing two Siemens Siprotec 7SD5 protection relays show that the m-SSSC device prevents the unnecessary operation of distance protection for the Obersielach-Podlog flow direction during an N-2 event.
Keywords:static synchronous series compensator, transmission line overload, distance protection, real-time digital simulator, hardware-in-the-loop testing.


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