Impact of other windings on frequency response of power transformers

• Autorzy: Banaszak S. , Gawrylczyk K. M.
• Konferencja: Computer Applications in Electrical Engineering (20-21.04.2015 ; Poznań, Polska)
• Języki publikacji: EN

Abstrakty

EN

The diagnostics of power transformers is a very fast developing branch. Due to increasing average age of assets and changes in asset management strategies, nowadays companies introduce asset management based on technical condition. One of important methods used for diagnostics of a transformer’s active part is Frequency Response Analysis (FRA). It allows determination of mechanical condition of windings, their displacements, deformations and electric faults, as well as some problems with internal leads and connections, core and bushings. In the FRA measurements of many power transformers there can be observed a first resonance, which position on frequency axis and damping factor seems to be similar for primary and secondary windings. The authors are going to explain this strange phenomenon, not depending on inductance of the winding being measured.

Słowa kluczowe

EN

transformer; frequency response analysis (FRA); modelling of windings

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Poznan University of Technology Academic Journals. Electrical Engineering
• Rocznik: 2015
• Tom: No. 81
• Strony: 31--38
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Banaszak S.

• West Pomeranian University of Technology in Szczecin

autor

Gawrylczyk K. M.

• West Pomeranian University of Technology in Szczecin

Bibliografia

• [1] Banaszak Sz., Gawrylczyk K.M.: TLM-Method for Computer Modelling of Transformers’ Windings Frequency Response, OIPE 2012, Ghent.
• [2] Banaszak Sz.: Conformity of Models and Measurements of Windings Deformations in Frequency Response Analysis Method, Przegląd Elektrotechniczny 7’2010, pp. 278-280.
• [3] Florkowski M., Furgał J.: Modelling of winding failures identification using the Frequency Response Analysis (FRA) method, Elect. Power Syst. Res., Vol. 79, No. 7, 2009, pp. 1069-1075.
• [4] Heindl M., Tenbohlen S., Velasquez J., Kraetge A., Wimmer R.: Transformer Modeling Based On Frequency Response Measurements For Winding Failure Detection, Proceedings of the 2010 International Conference on Condition Monitoring and Diagnosis, 2010, Tokyo, Japan, Paper No. A7-3.
• [5] Bjerkan E., High Frequency Modelling of Power Transformers. Stresses and Diagnostics, Doctoral Thesis, Norwegian University of Science and Technology, 2005.