Application of Underdetermined Blind Source Separation Algorithm on the Low-Frequency Oscillation in Power Systems

Yuanyang Xia, Xiaocong Li (), Zhili Liu and Yuan Liu
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Yuanyang Xia: Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530004, China
Xiaocong Li: Intelligent Manufacturing College, Nanning University, Nanning 530200, China
Zhili Liu: Yalong River Hydropower Development Co., Ltd., Chengdu 610051, China
Yuan Liu: Yalong River Hydropower Development Co., Ltd., Chengdu 610051, China

Energies, 2023, vol. 16, issue 8, 1-18

Abstract: The timely discovery of low-frequency oscillations in power systems and accurate identification of their modal parameters is critical in numerous applications. Therefore, we investigated the feasibility of using multi-channel signals and established a relative theory. An algorithm based on the underdetermined blind source separation (UBSS) algorithm was proposed using this theory. First, the energy ratio function was used to determine the fault occurrence time. Then, the Bayesian information criterion was used to estimate the number of fault sources, and the boundary conditions were set to determine the number of fault sources. Next, the UBSS algorithm was used to analyze raw data, extract individual components that characterize faults, and subsequently measure low-frequency oscillation modal parameters through the Hilbert transform. Finally, the fast independent component analysis (FastICA) algorithm was used to separate noise signal from raw data. This separation considerably reduced noise disturbance and ensured the stability of the proposed method. Model simulation was conducted in MATLAB and experimental measurement revealed that the proposed method effectively reduced noise disturbance and could be applied to conditions with considerable disturbance.

Keywords: underdetermined blind source separation; low-frequency oscillation; energy ratio function dimension transformation; source number estimation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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