Investigations on sensitivity of FRA technique in diagnosis of transformer winding deformations

Author

Jayasinghe, J.A.S.B. ; Wang, Z.D. ; Jarman, P.N. ; Darwin, A.W.

Author_Institution

Dept. of Electr. Eng. & Electron., UMIST, Manchester, UK

fYear

2004

fDate

19-22 Sept. 2004

Firstpage

496

Lastpage

499

Abstract

This work studies the sensitivity of frequency response analysis (FRA) method in detecting different types of deformations on a 6.6 kV plain disc type transformer winding. Winding deformations such as axial displacements and inter-turn faults are experimentally simulated and the measured FRA results are presented. A high frequency transformer-winding model is developed to investigate the sensitivity of the FRA method for these winding deformations. A comparison is carried out and a good agreement is shown between measured and calculated FRA results.

Keywords

deformation; fault diagnosis; frequency response; high-frequency transformers; power transformer testing; sensitivity analysis; transformer windings; 6.6 kV; FRA; axial displacements; deformation detection; frequency response analysis; high frequency transformer-winding model; inter-turn faults; plain disc type transformer winding; sensitivity method; transformer winding deformation diagnosis; Circuit faults; Deformable models; Dielectric losses; Frequency measurement; Oil insulation; Partial discharges; Power transformers; Testing; US Department of Transportation; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on

ISSN

1089-084X

Print_ISBN

0-7803-8447-4

Type

conf

DOI

10.1109/ELINSL.2004.1380661

Filename

1380661