基于改进PSO-Prony算法的谐波和间谐波分析

Harmonics and Interharmonics Analysis Based on Improved PSO-Prony Algorithm

针对传统的谐波和间谐波检测方法受噪声影响较大这一问题,提出了一种有效的抑制噪声影响的方法。通过分析噪声条件下传统Prony算法在谐波和间谐波特征参数检测中存在的局限性,并根据噪声对谐波和间谐波信号的频率检测结果影响较小,对幅值检测结果影响较大的特点,提出了基于PSO算法和Prony法的谐波和间谐波检测新算法PS0-Prony算法。通过仿真分析表明,该方法准确有效,对不同强度的噪声都有较好的抗噪效果,为电力系统谐波和间谐波分析提供了一种新方法。

The traditional harmonics and interharmonics detection method is greatly influenced by noise. In order to solve the problem, a kind of effective solution of noise suppression is proposed. By analyzing limitations of the traditional Prony algorithm in harmonics and interharmonics characteristic parameters detection, taking advantage of the characteristic of smaller impact on the frequency of harmonics and interharmonics signal ＆ larger influence on amplitude under the condition of noise, PSO-Prony algorithm is proposed tot harmonics and interharmonics detection method based on PSO algorithm and Prony algorithm. The simulation results show that this method is accurate, effective and has better antinoise performance under different intensity noise, which supplies a new method of power system harmonics and interharmonics analysis.