Abstract

This paper discusses the possibility of utilizing power transformer modelling for interpretation of frequency response analysis (FRA) measurements. FRA is a reliable technique for power transformer winding distortion and deformation assessment and monitoring. A lumped parameter model of a three phase power transformer is briefly presented and applied to simulate frequency responses at various winding fault conditions such as short-circuited turns, axial displacements and radial deformations. Simulations and discussions are presented to explore the potentials of the model to transformer fault detection based on FRA measurements.

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