基于Prony方法的电力系统振荡模式分析及PSS参数设计

Prony分析是获取系统振荡模式的一种非常有效的分析方法，它可以通过给定输入信号下的响应直接估计系统的振荡频率、阻尼、幅值和相对相位。文章介绍了基于Prony分析的电力系统等值线性模型的辨识方法，对传统的Prony方法进一步扩充，考虑了输入信号对输出信号的影响，得到了系统的传递函数，并根据其相应留数，采用留数方法对电力系统稳定器(PSS)进行了参数的协调配置。两个算例的仿真结果证明了该方法在系统振荡模式分析和PSS参数设计中的有效性。

POWER SYSTEM OSCILLATION MODE ANALYSIS AND PARAMETER DETERMINATION OF PSS BASED ON PRONY METHOD

Prony analysis is a very useful method to acquire power system oscillation modes, by which the oscillation frequency, amplitude, damping and relative phase can be directly estimated through the response of given input signals. As a further expansion of traditional Prony method, an identification method of power system equivalent linear model based on Prony analysis was presented, which considered the influence of input signal on output signal to acquire the transfer function of the system. Then, according to the corresponding residues the authors conducted coordinated setting of power system stabilizer (PSS) by residue method. The simulation results of two calculation examples proved that the presented method is effective in the system oscillation mode analysis and parameter determination of PSS.