基于Prony算法的暂态电能质量扰动信号分析

Transient Power Quality Disturbance Signal Analysis Based on the Prony Method

针对电能质量扰动信号特性,提出了一种基于Prony方法的信号分解算法.该方法将指数变换的时频特性与暂态信号特性描述相结合,可以提供各种分量的特征指标,如频率、幅值、相位等,利用最小二乘法得到高精度的拟合,并对暂态电能质量扰动的仿真信号和实测信号进行了分析.结果表明,Prony算法在暂态电能质量扰动信号分析中,可提供有效、准确的分析结果.

A decomposition algorithm of analytic signal based on the Prony method was presented according to the power quality signal characteristic. This method combines the exponential transform in time-frequency domain with the description of transient signal characteristic. The Prony analysis method can estimate all kinds of components characteristic, such as frequency, phase and magnitude, and produce high-accuracy fitting by least-square method. The simulation signal and the practical signal were analyzed respec...