Analysis Of Transformer Insulation Parameters Using Polarization And Depolarization Current Method And Frequency Domain Spectroscopy

Dielectric is an essential indicator for developing the ageing effect of transformer as they change their characteristics due to various stresses on transformer such as mechanical, chemical and electrical. The changes in dielectric property of oil-impregnated paper highly influence the transformer disaster. The basic intent of this paper is to be enlightened about the transformer health by analyzing the parameters of dielectric. This is evaluated by using a time domain test by deriving the polarization and depolarization currents of given dielectric under external field. The frequency domain is used to quantify the dielectric loss factor and complex capacitance, which is helpful to understand the transformer behavior. This paper also supports the comparison the proposed system with existing parameters of other existing system to get the knowledge about system health.

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