基于主元简化Prony方法的电力系统低频振荡扰动源定位研究
Research on Low Frequency Oscillation Disturbance Source Location of Power System Based on a Prony Method of Simplified Principal Element

电力系统低频振荡现象频发，针对目前振荡源定位不准确，计算量大等问题，本文基于强迫振荡能量函数以及振荡稳态阶段能量转化的关系和特征，在传统Prony方法定位扰动源基础上，提出基于参数辨识的扰动源定位方法，该方法运用结合主元法进行改进和简化，大大减少了计算量，在采取大量数据时可使得扰动源定位更加精准。最后，通过建立仿真模型验证该方法相较于传统Prony方法能够更加快速地定位扰动源位置，易于实现在线计算。
Low frequency oscillation occurs frequently in power system. Aiming at the problems of inaccurate positioning of oscillation source and large amount of calculation at present, based on the relationship and characteristics of forced oscillation energy function and energy conversion in the steady-state stage of oscillation, this paper proposes a disturbance source positioning method based on parameter identification on the basis of traditional Prony positioning disturbance source. This method is improved by combining the principal component method, which greatly reduces the amount of calculation and makes the disturbance source positioning more accurate when taking a large amount of data. Finally, a simulation model is established to verify that this method can locate the disturbance source more quickly than the traditional Prony method, and it is easy to perform the calculation online.