Influence of Operating Conditions on Hydrounit Power Oscillations

被引：0
|
作者：
Brezovec, Miljenko [1 ]
Brkljac, Blazenka [2 ]
Kuzle, Igor [3 ]
机构：
[1] HEP Proizvodnja Doo, Hydro North Medimurska 26c, Varazhdin, Croatia
[2] KONCAR Elect & Informat, Zagreb, Croatia
[3] Fac Elect Engn & Comp, Zagreb, Croatia
来源：
2013 IEEE EUROCON | 2013年
关键词：
power oscillations; hydropower unit; synchronous machine; bulb turbine; excitation system; power system stabilizer;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
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.
引用
收藏
页码：1447 / 1452
页数：6
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