Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima

Grahovac, Zoran

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scientific master's theses

Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima

Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2011. urn:nbn:hr:168:377841

Grahovac, Zoran

University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Energy and Power Systems

Cite this document

APA 6th Edition

Grahovac, Z. (2011). Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima (Scientific master's theses). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:377841

MLA 8th Edition

Grahovac, Zoran. "Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2011. https://urn.nsk.hr/urn:nbn:hr:168:377841

Chicago 17th Edition

Harvard

Grahovac, Z. (2011). 'Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima', Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 17 March 2025, https://urn.nsk.hr/urn:nbn:hr:168:377841

Vancouver

Grahovac Z. Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima [Scientific master's theses]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2011 [cited 2025 March 17] Available at: https://urn.nsk.hr/urn:nbn:hr:168:377841

IEEE

Z. Grahovac, "Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima", Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2011. Available at: https://urn.nsk.hr/urn:nbn:hr:168:377841

Cite this item: https://urn.nsk.hr/urn:nbn:hr:168:377841

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Metadata

Title	Relejna zaštita centraliziranih sustava za kompenzaciju jalove snage u srednjenaponskim postrojenjima
Title (english)	Centralized capacitor banks relay protection in medium voltage substations
Author	Zoran Grahovac
Mentor	Ante Marušić (mentor)
Committee member	Tomislav Tomiša (predsjednik povjerenstva)
Committee member	Ante Marušić (član povjerenstva)
Committee member	Srđan Žutobradić (član povjerenstva)
Granter	University of Zagreb Faculty of Electrical Engineering and Computing (Department of Energy and Power Systems) Zagreb
Defense date and country	2011-12-02, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Electrical Engineering
Universal decimal classification (UDC)	621.3 - Electrical engineering
Abstract	U svojim početcima, ideja kompenzacije jalove snage razvijala se iz sasvim tehničkih razloga, dakle radi smanjenja nepovoljnih utjecaja tokova jalove snage kroz elektroenergetsku mrežu. Sa pojavom tržišta električne energije, sustavi za kompenzaciju jalove snage počeli su značajno dobivati na važnosti, jer su gubici vezani uz tokove jalove snage poprimili financijski karakter. Iz očitih razloga želja je korisnika osigurati maksimalnu raspoloživost opreme za kompenzaciju jalove snage, te ju zaštiti od mogućih kvarova koji mogu nastupiti u redovnom pogonu. To je osigurano upotrebom vrhunskih numeričkih uređaja relejne zaštite, specifično razvijenih za te potrebe. U radu je prikazana metodologija relejne zaštite koja je danas u širokoj upotrebi u statičkim srednjenaponskim postrojenjima za kompenzaciju jalove snage. Izvršena je analiza strujno–naponskih događaja u normalnim i kvarnim pogonskim stanjima kondenzatorskih baterija i sukladno tome detaljno su opisane funkcije relejne zaštite za njihovo štićenje. Osim toga, prikazan je utjecaj viših strujnih i naponskih harmonika na rad spomenute relejne zaštite, koordinacija relejnih i primarnih zaštita baterije, te zahtjevi na mjerne transformatore i utjecaj njihove točnosti na zaštitu. Završni dio obrađuje odabir i načine podešenja releja, sa posebnim naglaskom na balansne zaštite. Za kvalitetniju ilustraciju izveden je praktičan proračun i podešenje zaštite realnog primjera sustava za kompenzaciju jalove snage.
Abstract (english)	In earlier times, whole idea of reactive power compensation was developed to cancel and avoid most of the technical issues concerning reactive power flow through the power grid. Only recently it has been approached much more seriously, due to liberal electric power market, costs and penalties connected with reactive power consumption. Consequently, with development of numerical protective relaying, whole range of protection functions has been implemented to make shunt capacitor banks as reliable and useful as possible. This work concentrates on relay protection of medium voltage capacitor banks, used for power factor correction throughout medium voltage power grid. Specifically, it analyses transient switching states in normal conditions, as well as capacitor bank external and internal fault conditions, backed up with protection functions designed to sense and clear faults in minimum time, with minimum bank damage. Additionally, the effect of harmonic currents and voltages, primary and relay protection coordination, and instrument transformers requirements and accuracy have been described in detail. Finally, there is relay setting philosophy analysis, and application of settings for one real example of medium voltage shunt capacitor bank. Special focus is on unbalance protection functions.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:168:377841
Study programme	Title: Postgraduate master programme in electrical engineering Study programme type: university Study level: postgraduate Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
Catalog URL	http://lib.fer.hr/cgi-bin/koha/opac-detail.pl?biblionumber=37235
Type of resource	Text
File origin	Born digital
Access conditions	Closed access
Terms of use
Repository	FER Repository
Created on	2020-08-27 09:34:24