识别电力系统密集振荡模式的模态灵敏度方法

Modal sensitivity method for identifying close modes in a power system

密集振荡模式可能会对电力系统动态特性产生重要影响,研究这种影响具有重要意义,而识别密集振荡模式是进行相关研究的基础。在分析机械力学领域密集模式判定方法的基础上,提出了一种识别电力系统密集振荡模式的模态灵敏度方法。该方法计算简单,能有效识别密集振荡模式,根据模态灵敏度信息还可以判断振荡模态的变化趋势。采用10机和24机两个算例验证了所提方法的有效性。

It is important to study the influence of close modes on the dynamic characteristics of power systems, and the identification of close modes is a research topic. Based on the analysis of a close modes identification method in the field of mechanics, a modal sensitivity method for identifying them in a power system is proposed. This method is simple in calculation and can effectively identify the close modes. Given modal sensitivity information, the change of oscillation modes can also be determined. Two examples of 10-machine and 24-machine power systems demonstrate the effectiveness of the proposed method.