The influence of shaft spring constant uncertainty on torsional modes of turbogenerator
The influence of shaft spring constant uncertainty on torsional modes of turbogenerator
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DOI：
10.1109/60.678981
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发表时间：
1998-06-01
影响因子：
4.9
通讯作者：
Milanovic, JV
中科院分区：
文献类型：
--
作者：
Milanovic, JV
探讨了汽轮发电机轴弹簧常数（刚度）的不确定性对扭转模态的影响。以典型的单机无限总线系统为例进行了分析。对5个旋转质量机械系统进行了小信号稳定性分析和大干扰分析。对发电机的不同运行工况进行了研究。结果表明，轴的弹簧常数（刚度）对阻尼和扭转模态频率有显著影响。分析了电气系统中较大扰动对轴内最大扭矩的影响。本文强调了涡轮发电机轴的精确建模对扭振和次同步共振研究的重要性。
The paper explores the dependence of torsional modes of turbogenerator on the uncertainty in the shaft spring constant (stiffness). The analysis is performed on a typical single machine infinite bus system. Small-signal stability analysis as well as large-disturbance analysis are performed on five rotational mass mechanical system. Different operating conditions of the generator are examined. It is shown that the spring constant (stiffness) of the shaft can significantly influence damping and frequency of torsional modes. Effects on maximum torsional torques developed in the shaft following large disturbance in the electrical system are also analysed. The paper underlines the importance of accurate modelling of the turbine-generator shaft for studies of torsional oscillations and subsynchronous resonance.