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In order to get more effective and accuracy results of condition evaluation for transformer, a dielectric response function model for frequency-domain dielectric spectroscopy (FDS) is presented in this paper based on dielectric physics in depth study. Firstly, the FDS properties of oil-immersed paper (OIP) are measured in lab. And the effect of the aging states on FDS characteristics of OIP was investigated...
Frequency domain dielectric spectroscopy (FDS) based on dielectric response has been widely used for assessment the state of oil-paper insulation in transformers. However, domestic and foreign researches are mostly focused on qualitative analyzing the changing behavior of frequency domain spectrum curve for different insulation conditions, such as different temperature, moisture and aging status....
To quantificationally apply the results of polarization and depolarization currents (PDC) measurement for condition evaluation of oil-paper insulation in power transformer, the differential time-domain spectroscopy (DTDS) theory and the extraction technique of sensitive characteristic parameters are introduced. A set of oil-immersed paper samples are thermally acceleratedly aged at high temperature...
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