Elektromehaničke oscilacije cijevnih hidroagregata

scientific master's theses

• Title (english): Electromechanical Oscillation of Bulb Type Hydropower units
• Author: Željko Zebić
• Mentor: Zlatko Maljković (mentor)
• Committee member: Zlatko Maljković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Electric Machines, Drives and Automation); Zagreb
• Defense date and country: 2006, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Electromechanical Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Automation and Robotics
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Cijevni hidroagregati su hidroagregati koji se potapaju u protočni trakt hidroelektrane. Ugrađuju se u elektranama kod kojih je prirodan pad vode premalen za okomite agregate. Obično su manjih snaga (do 100 MVA) i manjih brzina vrtnje (od 50 do 200 okretaja u minuti). Zbog manjeg ukupnog momenta tromosti, frekvencija vlastitih oscilacija cijevnih agregata, bliska je frekvenciji vrtnje. To može uzrokovati pojavu rezonancije. Upravo takva pojava uočljiva je kod cijevnih hidroagregata snaga 42 MVA... More u HE Dubrava. U radu je prikazan način izračunavanja frekvencije vlastitih oscilacija, rezultati mjerenja u HE Dubrava te dane usporedbe rezultata mjerenja i izvrenih proračuna za oba agregata. Less

Abstract (english)

The bulb-type horizontal-shaft hydro generators are enclosed electric machines placed straight in the water flow. They are usually used for power plants with small elevation drops, too small for utilization of vertical hydro generators. Typically, their rated power is up to 100 MVA and rated speed is 50 to 200 rpm. Due to lower inertia their natural frequency is close to rotation frequency, which can cause the resonance. This phenomenon is present in case of 42 MVA hydro generators in hydro... More power plant (HPP) Dubrava. Computational methods for determination of natural frequency and their verification by measurements, performed on both generators in HPP Dubrava, are presented in this thesis. Less

• Keywords: cijevni hidroagregati; vlastita frekvencija; moment tromosti
• Keywords (english): bulb type hydropower units; natural frequency; moment of inertia
• Language: croatian
• URN:NBN: urn:nbn:hr:168:120660
• 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)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-03-26 10:34:41