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undergraduate thesis
Načini smanjenja struje uklopa trofaznih transformatora
2017. urn:nbn:hr:200:323478
Hok, Marko
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Electromechanical Engineering
Chair of Electric Machines and Power Electronics

Cite this document

Hok, M. (2017). Načini smanjenja struje uklopa trofaznih transformatora (Undergraduate thesis). Retrieved from https://urn.nsk.hr/urn:nbn:hr:200:323478

Hok, Marko. "Načini smanjenja struje uklopa trofaznih transformatora." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2017. https://urn.nsk.hr/urn:nbn:hr:200:323478

Hok, Marko. "Načini smanjenja struje uklopa trofaznih transformatora." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2017. https://urn.nsk.hr/urn:nbn:hr:200:323478

Hok, M. (2017). 'Načini smanjenja struje uklopa trofaznih transformatora', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 22 May 2022, https://urn.nsk.hr/urn:nbn:hr:200:323478

Hok M. Načini smanjenja struje uklopa trofaznih transformatora [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2017 [cited 2022 May 22] Available at: https://urn.nsk.hr/urn:nbn:hr:200:323478

M. Hok, "Načini smanjenja struje uklopa trofaznih transformatora", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:200:323478

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Metadata
TitleNačini smanjenja struje uklopa trofaznih transformatora
Title (english)Three phase transformers inrush current reduction methods
AuthorMarko Hok
MentorŽeljko Špoljarić (mentor)
Committee memberKrešimir Miklošević (predsjednik povjerenstva)
Committee memberŽeljko Špoljarić (član povjerenstva)
Committee memberVedrana Jerković Štil (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
(Department of Electromechanical Engineering)
(Chair of Electric Machines and Power Electronics)
Osijek
Defense date and country2017-09-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Electromechanical Engineering
Abstract
U ovome radu opisan je konkretan problem i postavljeno rješenje za smanjenje velikih struja uklopa trofaznih transformatora. Također su opisani utjecaji uklopnih struja na mrežu. Dan je matematički model uklopa transformatora iste vrste s uračunatim efektima zaostalog magnetskog toka i petlje histereze. U potrebi za ispitivanjem i učenjem opisan je model za mjerenje zaostalog magnetskog toka na temelju poznate vrijednosti napona u trenutku isklopa trasformatora sa mreže. Upravljani uklop trofaznog transformatora smanjuje uklopnu i prijelaznu struju na vrijednost manju od jednostruke nazivne struje. Osim metode odabira optimalnog uklopa opisana je i moderna metoda za uklapanje energetskih transformatora sa pretvaračima sa pulsno širinskom modulacijom napona te metodom sekvencijalnog uklopa koristeći neutralni otpornik kao najznačajniji element metode. Uz odabranu metodu smanjivanja struje uklopa energetskog transformatora sastavni dio čini i sustav zaštite, nadgledanja i upravljanja koji se nalazi u transformatorskom uklopniku odnosno releju čije izvedbe mogu varirati od jednostavnih do složenih a neke od njih prezentirane su petim poglavljem ovog završnog rada.
Abstract (english)
In this article a specific problem and solution are given for reducing inrush currents of a three-phase transformers. There are also described how inrush current is effecting on conected power grid. It si given mathematical model for the energization of same kind transformer with included effects of remanent magnetic fluxes and hysteresis. In need of exsamination and learning it is described a model for the measuring the residual magnetic flux based on the known voltage value at the moment of transformer disconnection from power grid. Controlled energization of three-phase transformer can reduce inrush and transitional current to under one value of nominal current value. Beside determination the optional instant of energization method, it is also described modern method for energization power transformers with pulse width modification inverters of voltage, and sequential phase energization using neutral resistor like main component of this method. Protection relay's are described in fifth chart of this paper.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:323478
Study programmeTitle: Professional study programme of Electrical Engineering; specializations in: Power Engineering, Automation, Informatics
Course: Power Engineering
Study programme type: professional
Study level: undergraduate
Academic / professional title: stručni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike (stručni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2017-09-18 09:39:54