CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Exploring Possibilities for Characterization of POwer Transformer Insulation by Frequency Response Analysis (FRA)

Nilanga Abeywickrama (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Yuriy Serdyuk (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik)
IEEE Transactions on Power Dilivery (0885-8977). Vol. 21 (2006), 3, p. 1375-1382.
[Artikel, refereegranskad vetenskaplig]

This paper explores the possibility for using frequency response analysis (FRA) technique to characterize the quality of transformer insulation. For this purpose, a single-phase and a three-phase lumped parameter circuit models were developed.The single-phase model represents a transformer without a laminated core, whereas the three-phase model represents a real transformer with core. Calculations of frequency dependent circuit parameters are presented and the effects imparted on the frequency response by different loss mechanisms (in insulation, in windings and in core) are discussed. The simulations are compared with results of measurements on real objects. It is shown that FRA could be used for insulation diagnostics if the measurements were of high enough quality.

Nyckelord: Fault diagnosis, frequency response, power transformer



Denna post skapades 2007-01-09. Senast ändrad 2015-02-11.
CPL Pubid: 25040

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Högspänningsteknik

Ämnesområden

Elkraftteknik

Chalmers infrastruktur