基于Prony算法的发电机组间功率低频振荡在线辨识新方法

New Method of Low-frequency Oscillation Online Identification of Power Generators Based on Prony Algorithm

针对Prony算法抑噪能力差、计算效率低的问题,分析Prony算法的原理和主要参数的选择策略,提出一种基于Prony算法的发电机组间功率低频振荡在线辨识新方法,从模型有效阶数确定、AR参数估计、数据预处理等方面说明该方法的计算步骤,通过算例仿真及结果分析,认为该方法能够满足电力系统低频振荡在线辨识的需要。

As the traditional algorithm is sensitive to noise and has ineffective calculation, the basic principle of Prony algorithm is introduced in this paper,a new Prony method for online analysis of low-frequency oscillations between power generators is discussed in this paper.The calculation steps of the method are described by way of the identification of the practical order of the model, estimation of the parameters and the preproeess of the signal.The simulation results show that this method can meet the needs of low-frequency oscillations online identification.