Study on the Influence of Oil-paper Structure on Transformer Insulation Based on Frequency Domain Dielectric Spectrum
In order to study the influence of the number of oil-paper layers on the frequency domain dielectric characteristics,and then evaluate the influence of oil-paper structure on the transformer insulation characteristics.Test samples with different layers of oil-paper were prepared in the laboratory for FDS test.After in-depth analysis of the obtained FDS test results,it is proposed that the real part C'of the complex capacitance at the characteristic fre-quencies f=0.1 mHz,f=0.01 Hz and f=10Hz is the frequency domain dielectric characteristic parameter.The number of oil-paper layers and the dielectric characteristic parameters in frequency domain are fitted,and the influ-ence of oil-paper insulation structure on the insulation performance of transformer is evaluated through the fitting re-lationship between the two.The research results show that there is a function relationship between the number of oil-paper layers and the frequency domain dielectric characteristic parameters with a high degree of goodness of fit,which proves that this method is highly feasible to evaluate the effect of the number of oil-paper layers on the fre-quency domain dielectric characteristics.This method also provides a certain basis for the application of FDS method to evaluate the insulation performance of oil-paper structure.
transformeroil-paper insulationnumber of oil paper layersfrequency domain dielectric characteris-tic parameterreal part of complex capacitance
万方数据
维普
