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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....
The dielectric response of two bisphenol-A epoxy resin systems Araldite CY1301 (Tg ~ 50°C) and Araldite CY1311 (Tg ~0°C) was studied at different levels of absorbed moisture. The dielectric measurements were carried out over the frequency range 1 mHz to 100 kHz and the results were characterised in terms of dc bulk electrical conduction and dielectric processes. The characteristic parameters (frequency...
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