基于扩展Prony算法的电力系统非整次谐波分析

Power system fraction harmonic analysis based on prony algorithm

传统的谐波检测方法快速傅立叶变换存在栅栏和频谱泄漏现象,因而对电力系统的非整数次谐波不能够实现精确的检测,提出采用扩展Prony算法检测电力系统的谐波,该算法能一次性精确地检测到整数和非整数次谐波的相位、振幅、频率,为电力系统非整数次谐波检测提供了一条新的途径,数值仿真验证了本算法的有效性。

The conventional harmonic measurement algorithm fast Fourier transform (FFT) can't be used to accurately analyze fraction harmonics due to its leakage and picket {ence effects.This paper introduces Prony algorithm to analyze the fraction harmonics of power networks.The algorithm can be used to accurately ana- lyze the phase,amplitude and frequency of fraction harmonics,so the algorithm gives a new method for the fraction harmonics analysis of power system.Numerical example is provided to demonstrate the feasibility of the proposed algorithm.