含感应电机负荷的同步发电机五阶模型动态修正

Dynamic Correction for Fifth-Order Generator Model Considering Load Characteristics of Induction Motor

电力系统暂态稳定分析中,同步发电机的五阶模型和七阶详细模型之间存在着明显差异。提出了一种减小这种差异的动态修正方法,这种方法是以奇异摄动理论为基础,基于发电机模型的双时标特性,通过代数运算恢复定子磁链的快变动态。对带有感应电机负荷的单机无穷大系统和三机九节点系统进行了研究,仿真结果表明该方法能使功角差异和定子磁链差异显著减小。

There are obvious differences between the 5 th-order model and the 7 th-order model in the transient stability analysis of power system. Propose a dynamic correction which is based on the singular perturbation theory and dual time scale characteristics of generator model to decrease the differences by algebraic operation to restore faster dynamics of stator flux. Study a single machine infinite bus system and a nine bus system of three machines. The simulation results show that the method can greatly reduce the difference of the angle and the stator flux.