Complex blind source separation based harmonic contribution assessment
Yamei Liu, Lihong Wang, Xian-Yong Xiao, Ying Wang, Feiyu Chen · 2016
Harmonic contribution assessment is the precondition of harmonic responsibility-sharing and mitigating and its difficulty lies in real-time assessment of harmonic impedance. In order to solve this problem, this paper proposed a complex blind source separation (CBSS) based harmonic contribution assessment method. Use linear filter to abstract fast changing components from measuring data at the point of common coupling (PCC) and establish a CBSS based harmonic contribution assessment model; use complex maximization of non-Gaussianity (CMN) to assess demixing matrix, impedance matrix, and harmonic sources and the process of harmonic contribution assessment is studied in detail on this basis. The proposed method is validated by simulation, comparing with current methods, and the results prove that the proposed method can separate harmonic contribution directly with measuring data and it is suitable for resonance and non-resonance cases.