简单电力系统的次同步振荡辨识

Identification of Subsynchronous Oscillation in Simple Power System

传统汽轮发电机发生次同步振荡的本质为轴系的固有振荡频率和扰动电压或电流引起的电磁转矩频率接近同步或一致而引发的机械共振。在IEEE第一基准模型的基础上,利用时域仿真对次同步振荡现象进行了辨识。最后,计算了汽轮发电机的电气阻尼系数,进一步验证了仿真辨识的可信度。

The essence of subsynchronous oscillation of traditional turbogenerator is the mechanical resonance caused by the close synchronization or consistency between the natural oscillation frequency of shafting and the electromagnetic torque frequency caused by disturbed voltage or current.Based on the IEEE first benchmark model,the phenomenon of subsynchronous oscillation is identified by time-domain simulation.Finally,the electrical damping coefficient of turbogenerator is calculated to further verify the reliability of simulation identification.