{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-XJRZLD8I/6f4d4e09-bf9f-458d-92e5-5a23f065904e/PDF","dcterms:extent":"1221 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-XJRZLD8I/e67e487e-f04c-48da-a4a2-ee822b443d12/TEXT","dcterms:extent":"21 KB"}],"edm:TimeSpan":{"@rdf:about":"2013-2025","edm:begin":{"@xml:lang":"en","#text":"2013"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-XJRZLD8I","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:SPR-XAYCFMST"},{"@xml:lang":"sl","#text":"JET on-line"},{"@xml:lang":"sl","#text":"Journal of energy technology"}],"dcterms:issued":"2013","dc:creator":["Havranek, Mario","Knežević, Goran","Strinić, Tomislav"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:6"},{"@xml:lang":"sl","#text":"številka:iss. 1"},{"@xml:lang":"sl","#text":"str. 19-32"}],"dc:identifier":["COBISSID:1024132700","ISSN:1855-5748","URN:URN:NBN:SI:doc-XJRZLD8I"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Fakulteta za energetiko"},"dc:subject":[{"@xml:lang":"en","#text":"current reduction factor"},{"@xml:lang":"sl","#text":"električna merjenja"},{"@xml:lang":"sl","#text":"elektrodinamika"},{"@xml:lang":"en","#text":"grounding"},{"@xml:lang":"sl","#text":"izguba energije"},{"@xml:lang":"sl","#text":"prenos električne energije"},{"@xml:lang":"en","#text":"step voltage"},{"@xml:lang":"en","#text":"surface potential"},{"@xml:lang":"en","#text":"touch voltage"},{"@xml:lang":"sl","#text":"transformatorji"}],"dcterms:temporal":{"@rdf:resource":"2013-2025"},"dc:title":{"@xml:lang":"sl","#text":"Impact of the characteristics of overhead ground wires on the current reduction factor, and their effect on the change of grounding system potential| Vpliv lastnosti nadzemnega žičnega ozemljila na koeficient znižanja toka in posledično na spremembo potenciala ozemljitvenega sistema|"},"dc:description":[{"@xml:lang":"sl","#text":"This paper shows the impact of the characteristics of overhead ground wires on the change of grounding system potential in a power system substation during a single line to ground fault. The touch and step voltages can be affected by changing the overhead ground wire radius. The calculation of the current reduction factor depending on the size of the overhead ground wire is also presented. Furthermore, simulations of the grounding system potential, the surface potential as well as the touch and step voltages of a study case have been made using CYMGRD simulation software, which has implemented the IEEE 80-2000 standard (IEEE Guide for Safety in AC Substation Grounding). The power system substation observed in the simulation includes two incoming 110 kV transmission lines with two 110 kV bus bars as well as 35 kV and 10 kV bus bars. The entire grounding system of the substation is comprised of a conducting net aligned horizontally, and mutually interconnected by vertically placed conducting rods. The simulations performed show the change of the observed potential values for a given size of the overhead ground wire. In order to determine the maximum fault current that can occur in the observed substation (which is needed for calculation of the substation ground potential), a single-phase short circuit is simulated on the 110 kV bus bars, using the simulation software DIgSILENT Power Factory"},{"@xml:lang":"sl","#text":"V tem članku je predstavljen vpliv lastnosti nadzemnega žičnega ozemljila na spremembo potenciala ozemljitvenega sistema v razdelilni transformatorski postaji v primeru enofaznega kratkega stika z zemljo. Sprememba polmera nadzemnega žičnega ozemljila lahko povzroči spremembo napetosti dotika in napetosti koraka. Prav tako je predstavljen tudi izračun koeficienta znižanja toka, ki je odvisen od dolžine nadzemnega žičnega ozemljila. Predstavljene pa so tudi simulacije potenciala ozemljitvenega sistema, površinskega potenciala,napetosti dotika in napetosti koraka dotičnega primera obravnave, ob uporabi CYMGRD simulacijskega programskega orodja, zasnovanega na standardu IEEE 80-2000 (IEEE Navodila za varnost pri ozemljevanju izmeničnih razdelilnih postaj). Obravnavana razdelilna transformatorska postaja vključuje dva 110 kV dovodna daljnovoda z dvema 110 kV zbiralkama ter 35 kV in 10 kV zbiralkama. Pri tem je celotni ozemljitveni sistem razdelilne postaje sestavljen iz horizontalno položene prevodne ozemljitvene mreže, ki je medsebojno povezana z navpičnimi prevodnimi ozemljitvenimi palicami. Izvedene simulacije so pokazale spremembo opazovanih vrednosti potenciala pri določeni dolžini nadzemnega žičnega ozemljila. Z namenom določitve maksimalne vrednosti kratkostičnega toka, ki lahko steče v obravnavani razdelilni postaji in je potreben za izračun ozemljitvenega potenciala, je z uporabo simulacijskega programskega orodja DIgSILENT Power Factory izvedena simulacija enofaznega kratkega stika na 110 kV zbiralkah"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-XJRZLD8I","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-XJRZLD8I"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-XJRZLD8I/6f4d4e09-bf9f-458d-92e5-5a23f065904e/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Mariboru, Fakulteta za energetiko"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-XJRZLD8I/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-XJRZLD8I"}}}}