Mjerenja električkih i neelektričkih veličina za monitoring i dijagnostiku stanja u hidroelektranama

master's thesis

• Title (english): Measurement of electrical and non-electrical quantities for monitoring and diagnosis in hydro power plant
• Author: Josip Modrić
• Mentor: Damir Ilić (mentor)
• Committee member: Damir Ilić (predsjednik povjerenstva)
• Committee member: Ivan Leniček (član povjerenstva)
• Committee member: Luka Ferković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2014-07-04, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Ovaj Diplomski rad prezentira mjerenje električnih i neelektričnih veličina te trajni monitoring i dijagnostiku stanja hidroagregata – današnja potreba te pogodnosti navedenog sustava.
Tradicionalno, hidroelektrane su projektirane i izgrađene za kontinuirani rad, bez puno pokretanja i zaustavljanja njezinih agregata. U posljednje vrijeme takva praksa se promijenila. Puno više je pokretanja/zaustavljanja agregata, kao i češće promjene tereta. Ovakav razvoj događaja svakako uzrokuje potrebu za povećanom njegom te trajnim monitoringom i dijagnostikom hidroagregata jer konvencionalni nadzor (upravljanje, signalizacija, zaštita, mjerenje) nije više dovoljan za cjelokupnu “sliku” stanja hidroagregata.
Trajni monitoring bitnih parametara, kao što su vibracije, zračni raspor stator-rotor, magnetska slika stroja, parcijalna izbijanja namota statora i brojni druge, je dokazana metoda za otkrivanje i preveniranje mehaničkih i električnih kvarova. Sve navedene mjerene veličine detaljno su opisane, od fizikalnih osnova do primjene kroz trajni monitoring i dijagnostiku stanja hidroagregata. Nadalje, Diplomski rad će dati neke pogodnosti/prednosti trajnog monitoringa i dijagnostike stanja, kao što je bolja zaštita, povećana raspoloživost/pouzdanost, manje prisilnih zastoja, poboljšano održavanje, manji troškovi održavanja, produljenje intrvala između remonata/revitalizacije hidroagregata.
Na kraju, data je tehničko-ekonomska analiza i opravdanost ugradnje takvog sustava te neka svjetska iskustav u vezi s tim.

Abstract (english)

This Diploma thesis presents the measurement of electrical and nonelectrical quantities and continuous monitoring and diagnostics of hydro machines – today's necessity and benefits of these systems.
Traditionally hydropower plants have been design and built for optimal energy generation with continuous operation. Lately, many power plants have experienced a change in operation pattern with more starting and stopping and larger and more frequent load changes than before. This development causes increased measuring and monitoring systems for hydropower machinery because standard or conventional control and measuring system are not enough for complete «picture» of condition of hydroelectric turbine-generator sets.
Continuously monitoring critical asset parameters such as vibration, air gap, magnetic flux, partial discharge and numerous other condition indicators is proven method for anticipating and preventing mechanical and electrical failures. All numbered parameters are detailed described, from some physics basis to application through on-line measuring and condition monitoring systems of hydro machines. Furthermore, Diploma thesis presents some benefits of on-line condition monitoring and diagnostics systems, such as: improved protection from catastrophic failures, better machinery reliability/availability, fewer process interruptions, enhanced maintenance/outage planning, lower maintenance and repair costs, longer intervals between outages.
At the end it'll present technical-economical analysis and feasibility of these systems and some world's experience in exploitation of the same systems.

• Keywords: Hidroagregat; trajni monitoring i dijagnostika stanja; vibracije; zračni raspor; magnetska indukcija; parcijalna izbijanja; interpretacija; primjena; održavanje; pouzdanost; raspoloživost; kvar; zastoj; prednosti
• Keywords (english): Hydro machine; on-line condition monitoring and diagnostics systems; vibration; air gap; magnetic flux; partial discharge; interpretation; application; maintenance; reliability; availability; failure; outages; cost benefits
• Language: croatian
• URN:NBN: urn:nbn:hr:168:760573
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 10:48:59