Abstract:Power spectrum estimation and factor analysis were applied to analyze anodes magnetic field data and anodes current signal of 500 kA aluminum cell. The spectral characteristics in different anodes of the same aluminium cell were extracted, and compared with magnetic field date analysis results from factor analysis. The results show that magnetic field data on both sides of the same cell present different distribution. That is, magnetic field data of column bus on A side manifests a sharp fluctuation, while distributed in balance on B side, magnetic field strength of two anode conductors close to A-side column bus is weak. Two main elements from A-side magnetic field data and one main element from B-side were extracted based on factor analysis. The frequency of two main peaks in the signal power spectrum curve from A side anode current and that of the only one peak from B side anode current are 0.012 Hz, 0.023 Hz and 0.000 1 Hz, respectively.