TIAN Haoyang, MA Wenjia, WANG Fenghua, et al. Research on Audible Noise of UHV Power Transformer Based on Sparse Auto-encoder[J]. High voltageapparatus, 2020, 56(9): 67-73+79.
TIAN Haoyang, MA Wenjia, WANG Fenghua, et al. Research on Audible Noise of UHV Power Transformer Based on Sparse Auto-encoder[J]. High voltageapparatus, 2020, 56(9): 67-73+79. DOI: 10.13296/j.1001-1609.hva.2020.09.010.
Research on Audible Noise of UHV Power Transformer Based on Sparse Auto-encoder
As one of the main noise source in UHV AC substation
the body noise of power transformer
cooling device noise and environment noise of an operated UHV power transformer are always overlapped with each other.This phenomenon would bring about some negative effects for the accurate analysis of noise features of power transformer in UHV AC substation.Based on the noise measurement results of UHV power transformer in a 1 000 kV AC substation
the method to extract the body noise of UHV power transformer based on the combination of stop-band filter and sparse auto-encoder is proposed through the design of stop-band filter and reasonable selection of key parameters of sparse auto-encoder
including number of hidden layer nodes
sparse parameter
etc.The spectrum waterfall of noise signals of UHV power transformer is analyzed.The results have shown that the frequency of body noise of UHV power transformer is mainly at 100 Hz
200 Hz and 300 Hz component.The body noise of UHV power transformer obtained by the proposed network of sparse auto-encoder has the more stable waveform in time domain and high resolution in frequency domain.The results could provide the reference for the analysis and evaluation of audible noise of power transformer in UHV AC substation.