An Identification Method of Harmonic Source in the Power System Based on Independent Component Analysis

Abstract:

In this research, an identification method of harmonic source, based on independent component analysis, was proposed. An unknown harmonic source in the equivalent circuit of power system was regarded as the signal source in the independent component analysis. The known voltage and current of PCC were taken as observed quantities. The independent component analysis and the optimization algorithm were utilized to construct a matrix that could linearly transform voltage and current of PCC into mutually independent signal sources. The harmonic impedance and harmonic source of both the user side and system side were obtained. Then the contribution of users to the harmonic distortion at PCC could be identified. With a good anti-jamming property, this algorithm only needs a condition that variations in the harmonic voltage sources at system side and user side are independent to each other. Simulation results indicated the effectiveness of the method to identify the harmonic source of PCC.

• Periodical: Applied Mechanics and Materials (Volumes 380-384)
• Pages: 4088-4093
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.380-384.4088
• Online since: August 2013
• Authors: Shan Jiang, Min You Chen, Hao Lin, Zhi Sheng Lv, Ang Fu
• Keywords: Harmonic Source Identification, Independent Component Analysis (ICA), Power Quality (PQ)

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