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eng Editorial message
Banovic, Mladen
Transformers Magazine Vol. 6, No. 5, 2019
Dear Readers, You are holding in front of you our Special Edition on Substations. This topic is the result of our readers' choice and I think this is a good opportunity for all of us dealing with specific products, to look at the big picture and the conditions in which these products are made – substations. This issue confirmed once again that digitalization is the dominant trend which enables new opportunities and imposes new challenges for power products. The first conclusion would be that monitoring as we know it, will slowly cease to sati...
Hrčak ID: 228360


eng The advantages of ester liquids for substation design
Jarman, Paul
Transformers Magazine Vol. 6, No. 5, 2019
As the pressure on substation designers grows in terms of space limitations, cost, and safety, ester filled transformers can offer a useful solution to difficult problems at transmission as well as distribution voltages.
Hrčak ID: 228365


eng Substations equipment inspection and periodic maintenance
Bolotinha, Manuel
Transformers Magazine Vol. 6, No. 5, 2019
In this article we analyse frequency, actions regarding preventive maintenance frequency and inspections that must be carried out when dealing with 60-800 kV equipment (insulators, circuit breakers, isolator switches, instrument transformers and surge arresters), in order to keep them working properly, within manufacturers’ instructions, and to avoid premature ageing of the equipment, namely busbar system and insulators, circuit breakers, isolator switches, instrument transformers and surge arresters.
Hrčak ID: 228368


hrv Elektormagnetska kompatibilnost kod zrakom izoliranih transformatorskih stanica
eng Electromagnetic Compatibility in Air Insulation Substation
Khelifi, Bochra; Nekhoul, Bachir; Kerroum, Kamal; Drissi, Khalil El Khamlichi; Poljak, Dragan
Automatika Vol. 55, No. 4, 2014
U ovom radu analizira se tranzijentna sprega između sabirnica zrakom izoliranih transformatorskih stanica i kontrolnog kabela u njenoj blizini. Ovom analizom uzima se obzir složena geometrija sabirnica i konačna vodljivost tla. Direktna vremenska formulacija zasniva se na teoriji prijenosnih linija i metodi konačnih diferencija u vremenskom području. Pobude su dane u vidu lokaliziranih strujnih, donosno naponskih generator i odgovarajućeg električnog polja kojeg zrače sabirnice. Da bi se osigurali zahtjevi elektromagnetske kompatibilnosti struj...
Hrčak ID: 133192


eng EQUATION SYSTEM CONCEPT FOR COMPUTATION OF GROUND FAULT CURRENT DISTRIBUTION WITH ELECTROMAGNETIC MODEL
hrv KONCEPT SUSTAVA JEDNADŽBI ZA IZRAČUN RASPODJELE STRUJE ZEMLJOSPOJA ELEKTROMAGNETSKIM MODELOM
Balaž, Zdenko; Meštrović, Krešimir
Polytechnic and design Vol. 7, No. 4, 2019
This paper describes the new equations system concept of electromagnetic model for computation of ground fault current distribution in electric power substations. We developed the new electromagnetic model based on applying the finite element technique to an integral equation formulation in the frequency domain. Model components can be located in homogeneous soil or in air. Model can take into account complete electromagnetic coupling between its components. Using known ground fault currents of adjacent substations, from which power substation...
Hrčak ID: 236126


hrv IZRADA ISTRAŽIVAČKE STUDIJE I PROVEDBA PILOT-PROJEKTA „OPTIMIZACIJA NAPAJANJA ELEKTRIČNE VUČE IZ PRIJENOSNE MREŽE U SVRHU POVEĆANJA ENERGETSKE UČINKOVITOSTI“
eng MAKING OF A RESEARCH STUDY AND IMPLEMENTATION OF A PILOT PROJECT “OPTIMIZATION OF ELECTRIC TRACTION POWER SUPPLY FROM THE TRANSMISSION NETWORK FOR INCREASING ENERGY EFFICIENCY
Mandić, Milivoj
Željeznice 21 Vol. 16, No. 3, 2017
Nakon što je objavljen prvi javni CEF Synergy poziv na dostavljanje projektnih prijava (28. rujna 2016. godine), što ga je poslala Izvršna agencija za inovacije i mreže (INEA), projektni tim HŽ Infrastrukture krenuo je u izradu projektne ideje. Nakon toga uz konzultacije s tvrtkom Ernst & Young Savjetovanje d.o.o. krenulo se u izradu dokumentacije za apliciranje na spomenuti poziv. Sva je potrebna dokumentacija (obrasci A, B, C i D) elektronički predana 12. prosinca 2016. godine. Evaluacija pristiglih prijava završena je krajem ožujka 2017. god...
Hrčak ID: 189457