Naslov
Oscillations in Bulb Type Hydropower Unit

Autori
Maljković, Zlatko ; Gašparac, Ivan ; Žarko, Damir ; Magić, D.

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), stručni

Izvornik
CIGRÉ SC A1 and EPFL Joint Colloquium on Large Electrical Machines : proceedings / CIGRÉ - , 2005

Skup
CIGRÉ SC A1 and EPFL Joint Colloquium on Large Electrical Machines

Mjesto i datum
Lausanne, Švicarska, 04.09.2005. - 09.09.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
bulb generator; power oscillation; natural frequency

Sažetak
During the full load operation of the bulb type generator in HPP Dubrava in Croatia the problem of power oscillations occurs. It is particularly emphasized on one of the two generators where the oscillation is observable on the instruments in the command room. The frequency of power oscillation is 2, 083 Hz which is the same as the rotor speed frequency. The research methodology of the cause of phenomenon and the partial results of specialized measurements are presented in the paper. The principle of determination of the rotor moment of inertia for both units, as the most important parameter for defining the natural frequency of electromechanical oscillations, is also presented. According to the results, as it was expected in theory, the natural frequency depends on the working conditions. At full active power and small or negative reactive power, the natural frequency of electromechanical oscillations becomes smaller and is very close to the rotor speed frequency. Finally, the possible solutions to the problem are considered.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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