Naslov
Influence of Operating Conditions on Hydrounit Power Oscillations

Autori
Brezovec, Miljenko ; Brkljač, Blaženka ; Kuzle, Igor

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

Izvornik
IEEE EuroCon 2013 / Kuzle, Igor ; Capuder, Tomislav ; Pandžić, Hrvoje - Zagreb : Fakultet elektrotehnike i računarstva Sveučilišta u Zagrebu, 2013, 1453-1458

ISBN
978-1-4673-2231-7

Skup
IEEE EuroCon 2013

Mjesto i datum
Zagreb, Hrvatska, 01.07.2013. - 04.07.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
power oscillations; hydropower unit; synchronous machine; bulb turbine; excitation system; power system stabilizer

Sažetak
Because of many different instability reasons, power unit stability problems should be analyzed in details for each specific case. This paper describes a specific case of power oscillations problem of hydroelectric power unit with double regulated bulb turbine. In some working conditions, natural frequency of electromechanical oscillations could be close to the rotor speed frequency and small disturbance on turbine would be amplified few times because of electromechanical resonance. Influence of operating conditions on natural frequency is analyzed using mathematical model of synchronous machine with excitation system. Simulation model results show that natural frequency decreases significantly with active power increase and near maximum active power becomes close enough to the rotor speed frequency to enter resonance mode.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA