Translated Title
Analysis of Equivalent Circuit of Oil-Paper Insulation Transformer Relaxation Response and Aging Evaluation
Translated Abstract
A judgment method for the polarization branches number of the equivalent circuit of oil-paper insulation equipment is proposed. The differential dielectric spectroscopy method is applied to gradually decomposing the measured return voltage curves. In this way,all the sub-lines which are implicit in the internal relaxation response of the return voltage curves could be presented. Then the polarization branches number of extended Debye model is judged by the number of sub-lines. Results show that the more aging seriousness of the transformer oil-paper insulation is, the more numbers of the polarization branches and the higher relaxation polarization will be. The value of the relaxation polarization is small when the oil-paper insulation is in good condition. Otherwise,the value is greater. The proposed method is an effective way to evaluate the oil-paper aging using the equivalent circuit of relaxation response.
Translated Keyword
differential dielectric spectrum
equivalent circuit
relaxation polarization
Relaxation response
return voltage
Access Number
WF:perioarticaldgjsxb201615024
