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master's thesis
Koordinacija zaštite u mikro mrežama
2019. urn:nbn:hr:200:725118
Tolić, Perica
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Power Engineering
Chair of Power Systems and Substations

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Tolić, P. (2019). Koordinacija zaštite u mikro mrežama (Master's thesis). Retrieved from https://urn.nsk.hr/urn:nbn:hr:200:725118

Tolić, Perica. "Koordinacija zaštite u mikro mrežama." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2019. https://urn.nsk.hr/urn:nbn:hr:200:725118

Tolić, Perica. "Koordinacija zaštite u mikro mrežama." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2019. https://urn.nsk.hr/urn:nbn:hr:200:725118

Tolić, P. (2019). 'Koordinacija zaštite u mikro mrežama', Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 21 March 2023, https://urn.nsk.hr/urn:nbn:hr:200:725118

Tolić P. Koordinacija zaštite u mikro mrežama [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2019 [cited 2023 March 21] Available at: https://urn.nsk.hr/urn:nbn:hr:200:725118

P. Tolić, "Koordinacija zaštite u mikro mrežama", Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:200:725118

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Metadata
TitleKoordinacija zaštite u mikro mrežama
Title (english)Protection coordination in microgrids
AuthorPerica Tolić
MentorSrete Nikolovski (mentor)
Committee memberSrete Nikolovski (predsjednik povjerenstva)
Committee memberPredrag Marić (član povjerenstva)
Committee memberKrešimir Fekete (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
(Department of Power Engineering)
(Chair of Power Systems and Substations)
Osijek
Defense date and country2019-03-08, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Abstract
U radu je opisana problematika vezana uz pojavu mikromreža unutar elektroenergetskog sustava koja se posebno manifestira na selektivnom postavljanju zaštite budući da je mreža dvostrano napajana. Različiti kvarovi su simulirani na više mjesta u mreži, s ciljem ostvarivanja selektivnosti za svako od mjesta. Dakle osnovni zadatak je da za svaki kvar odreagira zaštitni element koji je najbliži mjestu kvara te odvoji samo element koji je u kvaru. Pokušaj ostvarivanja koordinacije samo nadstrujnim relejima i to trenutnim i vremenski ovisnim članom nije bio uspješan. Zadaća trenutnog člana je bila isklop na minimalne struje kratkog spoja dok je zadaća vremenski ovisnog bila isklop na preopterećenja u mreži. Da bi koordinacija bila uspješna dodan je na dva mjesta i usmjereni relej, s trenutnim i vremenski ovisnim članom koji reagiraju kada se iznos i smjer struje kvara poklope sa zadanim. Napravljene su i simulacije valnih oblika struje i napona, prije, za vrijeme kvara, te nakon prorade zaštite.
Abstract (english)
The paper describes the problems related to the emergence of the microgrids within the power system which is particularly manifested in the protection selectivity since the network is powered from two sides. Various faults have been simulated on multiple pints in the microgrid, in order to achieve selectivity for each of the points. The main task is that for every fault reacts protective device that is closest to the fault location and disconnect only the element that is in fault. Attempting to achieve co-ordination only with overcurrent relays with the short-time and longtime tripping delay was not successful. Short-time tripping delay is used for clearing shortcircuits while long-time tripping delay is used for preventing overload in microgrid. That is when it was necessary to add directional relay on the points in microgrid. Directional relays will trp only when the value of short circuit current equals or past value that is set in relay and short circuit current must flow in the same direction as it's been set in relay. Simulation of waveforms of current and voltage were also made for the states before, during the failure, and after the protection reacts.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:725118
Study programmeTitle: Graduate University Study Programme in Electrical Engineering; specializations in: Communications and Informatics, Power Engineering
Course: Power Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike (magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-03-14 14:34:22