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Title:MODELNO PODPRTI ALGORITMI NUMERIČNE DISTANČNE ZAŠČITE
Authors:ID Knežič, Jernej (Author)
ID Polajžer, Boštjan (Mentor) More about this mentor... New window
ID Grčar, Bojan (Comentor)
Files:.pdf MAG_Knezic_Jernej_2018.pdf (1,59 MB)
MD5: AE324FCF5E407FFBC6D2F14460E88CAB
PID: 20.500.12556/dkum/de58ab50-6b54-46a8-976b-0ae00ca0d357
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Glavna naloga numerične distančne zaščite je, da iz izmerjenih linijskih napetosti in tokov pravilno določi impedanco pozitivnega zaporedja od relejne točke do mesta okvare. To lahko določimo z digitalnimi filtri ali uporabo modelno podprtih numeričnih algoritmov. Slednji temeljijo na RL- ali π-modelih vodov v diferenčni ali integralni obliki. V praksi je delovanje numerične distančne zaščite odvisno od različnih dejavnikov, ki lahko v nekaterih primerih privedejo do podaljšanja ali skrajšanja posameznih stopenj delovanja, kar se lahko kaže bodisi kot neselektivno bodisi kot zakasnjeno delovanje. Obravnavani algoritmi so ovrednoteni s simulacijami kratkih stikov, ki zajemajo vpliv aperiodične komponente toka, nasičenje tokovnih transformatorjev, napetost obloka, popačitve napetosti izvora in odstopanje frekvence omrežja. Validacija algoritmov je izvedena tudi z meritvami, dobljenimi v slovenskem prenosnem omrežju.
Keywords:Zaščita prenosnih vodov, distančna zaščita, modelno podprti algoritmi, numerična zaščita.
Place of publishing:[Maribor
Publisher:J. Knežič
Year of publishing:2018
PID:20.500.12556/DKUM-70470 New window
UDC:621.315:621.317.72(043.2)
COBISS.SI-ID:21528086 New window
NUK URN:URN:SI:UM:DK:JERQ9WMM
Publication date in DKUM:27.06.2018
Views:1778
Downloads:279
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:14.05.2018

Secondary language

Language:English
Title:MODEL-BASED ALGORITHMS FOR NUMERICAL DISTANCE PROTECTION
Abstract:The main function of a numerical distance protection is correct estimation of an impedance for a positive sequencebetween relay point and fault location. The seen impedance can be estimated by digital filters or with use of numerical model-based algorithms. The latter are based on the RL- or π-line models, using differential or integral form. In practice, the operation of numerical distance protection depens on various factor, which may lead to overreaching or shortening of individual distance zones. This can result to a non-selective or delayed operation. All the discussed algorithms are evaluated using simulations of short circuits, considering aperiodic component in of a current, saturation of current transformers, arcing voltage, supply voltage distortions, as well as frequency deviation. Validation of algorithms was performed also for field measurments captured in Slovenian transmission network.
Keywords:Protection of transmission line, distance protection, model-based algorithms, numerical protection.


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