Title :
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
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;
Conference_Titel :
Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on
Print_ISBN :
0-7803-8447-4
DOI :
10.1109/ELINSL.2004.1380661
