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在研究电力系统低频振荡时,传统方法通常忽略水轮机及调速系统的影响。本文提出了水电站单机无穷大系统的低频振荡研究模型,计及了励磁调节系统和水轮机及其调速系统的作用,对不同状态下的特征根进行了比较,并做了振荡模式的相关性和灵敏度分析,结果表明水轮机及其调速系统对电力系统低频振荡模式的影响不可忽略。
In the study of power system low-frequency oscillation, the traditional method usually ignore the impact of turbine and speed control system. In this paper, a low-frequency oscillation research model for single-machine infinite system of hydropower station is proposed. The functions of excitation regulation system, turbine and its speed governing system are taken into account. The eigenvalues under different states are compared and the correlation and sensitivity of oscillation modes The results show that the influence of turbine and its speed regulation system on low frequency oscillation mode of power system can not be neglected.