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BAZA PODATAKARELEJNE ZA©TITERELAY PROTECTIONDATABASEIzv. prof., dr. sc. Elis SutloviÊ, SveuËiliπte u Splitu, Fakultet elektrotehnike,strojarstva i brodogradnje, R. BoπkoviÊa bb, 21000 Split, HrvatskaKrunomir Petric, dipl. ing., HEP Operator distribucijskog sustava d.o.o.,PoljiËka cesta 73, 21000 Split, HrvatskaU radu je prikazan razvoj baze podataka relejne zaπtite kroz niz faza. U fazi planiranja bazesagledani su problemi u tipiËnom odjelu relejne zaπtite i utvrappleeno je zaπto razvijati bazu podataka.Potom je u fazi analize i specifikacije zahtjeva definirano za πto Êe se baza koristiti. U fazioblikovanja i izrade baze podataka definiran je njen logiËki, a potom i fiziËki model na raËunalukoriπtenjem sustava za upravljanje bazom podataka Microsoft Access koji je precizirao kako Êebaza podataka raditi. Na kraju je baza podataka uvedena u rad provjerom na stvarnim podacimate izobrazbom buduÊih korisnika. Prikazana baza podataka omoguÊava sistematizaciju, Ëuvanjei koriπtenje velikog broja podataka uz minimalnu redundanciju. Pored toga pruæa podrπku priredovnom odræavanju ureappleaja relejne zaπtite, izdavanju radnih naloga, periodiËkom izvjeπtavanjuitd. Bazi podataka relejne zaπtite moæe pristupiti nekoliko korisnika s razliËitim ovlastima nadpojedinim objektima baze. Pravo pristupa odreappleeno je korisniËkim identitetom. Takoappleer jekreirana i posebna aplikacija za lakπi pregled, aæuriranje i ispis podataka koji omoguÊava prikazniza ranije pripremljenih komponenti baze podataka relejne zaπtite. Osnovna namjena aplikacijeje omoguÊiti korisniku koriπtenje pune snage Microsoft Access uz najmanje truda i minimumpotrebnog znanja o tehnici baza podataka i sustavu za upravljanje bazom podataka.The article presents the development of a relay protection database through a series of phases.In the planning phase of the database, problems in a typical relay protection department are examinedand the reasons why a database should be developed are determined. Subsequently, duringthe phase of analysis and the specification of requirements, what the database will be usedfor is defined. In the phase of the formation and construction of the database, its logic is definedand then a physical model is prepared on a computer using the Microsoft Access database managementsystem, which stipulates how the database will operate. The database is placed intooperation and verified using actual data. Training is then provided for the future users.The database presented facilitates the systematization, storage and use of a large quantity ofdata with minimum redundancy. In addition, it provides support during the regular maintenanceof relay protection equipment, the issuing of work orders, periodic reporting etc. The relayprotection database can be accessed by several users with differing permissions for individualobjects of the database. The right to access is defined by the user identity. Furthermore, aspecial application has been created to simplify searching updating and printing-out of data,which facilitates the display of a series of previously prepared components of the relay protectiondatabase. The basic purpose of the application is to allow the user to utilize the full powerof Microsoft Access with a minimum of effort and a minimum of required knowledge aboutdatabase technique and the system for database management.KljuËne rijeËi: baza podataka, elektroenergetski sustav, relacijski model podataka, relejna zaπtitaKey words: database, electric power system, relational data model, relay protectionSutloviÊ, E., Petric, K., Baza podataka relejne zaštite, Energija, god. 56(2007), br. 5., str. 618-633SutloviÊ, E., Petric, K., Relay Protection Database, Energija, vol. 56(2007), No. 5, pp. 618-633618