Sensitivity of Subsynchronous Resonance Predictions to Turbo-Generator Modal Parameter Values and to Omitting Certain Active Subsynchronous Modes
Sensitivity of Subsynchronous Resonance Predictions to Turbo-Generator Modal Parameter Values and to Omitting Certain Active Subsynchronous Modes
复制标题
次同步谐振预测对涡轮发电机模态参数值和忽略某些主动次同步模式的敏感性
DOI：
10.1109/mper.1987.5527425
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发表时间：
1987
影响因子：
4.9
通讯作者：
D. Levy
中科院分区：
文献类型：
--
作者：
G. Jennings;Ronald G. Harley;D. Levy
在次同步谐振稳定性研究中，预测的临界补偿水平（CCL）取决于数学模型和参数值，特别是取决于机械阻尼或衰减因子。机械参数的测量产生模态惯性、模态阻尼等的值，因此必须将机械系统方程转换为模态形式，以便在仿真研究中使用测量数据。本文研究了预测的CCL值（对于一个特定的案例研究）的灵敏度，在不同的模态参数的不确定性，并发现模态阻尼或衰减因子是更关键的比模态惯性或模态形状。它继续显示如何模态模型可以减少从第12到第4阶，仍然产生可接受的结果，这将导致相当大的简化和节省计算机时间在多机SSR研究。
In a subsynchronous resonance stability stuiy the predicted CRITICAL COMPENSATION LEVEL (CCL) depends on the mathematical model and parameter values, particularly on the mechanical damping or decrement factor. Measurements of the mechanical parameters yield values for modal inertia, modal damping etc. so that the mechanical system equations have to be transformed into modal form in order to use the measured data in simulation studies. This paper investigates the sensitivity of the predicted CCL values (for a particular case study) to uncertainties in the different modal parametes and finds that the modal damping or decrement factor is more critical than modal inertia or mode shape. It carries on to show how the modal model can be reduced from 12th to 4th order and still yield acceptable results; this would lead to considerable simplfication and saving of computer time in multi-machine SSR studies.