ZHANG Cheng, LIU Jiajing, KUANG Yu, et al. Power System Low Frequency Oscillation Modal Identification Based on the FastICA Technique and TLS-ESPRIT Algorithm[J]. 2021, 47(6): 2214-2222.
ZHANG Cheng, LIU Jiajing, KUANG Yu, et al. Power System Low Frequency Oscillation Modal Identification Based on the FastICA Technique and TLS-ESPRIT Algorithm[J]. 2021, 47(6): 2214-2222.DOI:
基于FastICA技术与TLS-ESPRIT方法的电力系统低频振荡模态辨识
摘要
对于目前电力系统中低频振荡参数辨识中的噪声干扰和精度问题
提出了一种新的提取低频振荡模态参数的方法
将快速独立分量分析技术(fast independent component analysis
Fast ICA)和总体最小二乘-旋转不变技术(total least squares-estimation of signal parameters via rotational invariance technique
The noise interference and accuracy of low-frequency oscillation parameter identification in the power system are discussed
and a new method for extracting the modal parameters of low frequency oscillation is put forward. The Fast ICA(Fast Independent Component Analysis) is combined with the total least squares-estimation of signal parameters via rotational invariance technique(TLS-ESPRIT). Firstly
the FastICA technology is employed to pre-process the low-frequency oscillation wide-area measurement signal of power system containing noise so as to achieve noise reduction effect.Then
the TLS-ESPRIT algorithm is employed to estimate and identify the filtered signal to obtain each modal parameter. Finally
the validity and feasibility of FastICA-TLS-ESPRIT method are verified by simulation of ideal signal and EPRI-36 machine system and grid measure signal
and it is that this method not only can be adopted to effectively suppress noise and accurately identify low-frequency oscillation parameters
but also has certain advantages in anti-interference and extraction accuracy compared with traditional identification methods.