Practical use of RLC-models of transformers’ windings for determination of local displacements

• Autorzy: Banaszak S. , Gawrylczyk K. M.
• 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 a real 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. For the aim of windings impedance modeling the RLC models are applied. The idea of lumped parameters models was presented in [6]. The new universal model basing on circuit solution is developed in this paper. Lumped parameters used in calculations are obtained with finite element method and Maxwell package. The examples of models created for simple windings were compared to real measurements.

Słowa kluczowe

EN

transformer’s diagnostic; frequency response analysis (FRA); lumped parameter models

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Computer Applications in Electrical Engineering
• Rocznik: 2013
• Tom: Vol. 11
• Strony: 100--109
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Banaszak S.

• West Pomeranian University of Technology, 70-310 Szczecin, ul. Gen. Sikorskiego 37

autor

Gawrylczyk K. M.

• West Pomeranian University of Technology, 70-310 Szczecin, ul. Gen. Sikorskiego 37

Bibliografia

• [1] Banaszak Sz., Gawrylczyk K.M.: TLM-Method for Computer Modeling of Transformers’ Windings Frequency Response, OIPE 2012, Ghent.
• [2] Jayasinghe J.A.S.B, Wang Z.D., Darwin A.W., Jarman P.N.: Practical Issues in Making FRA Measurements on Power Transformers, XlVth International Symposium on High Voltage Engineering, Beijing, China, August 2005, G-013.
• [3] Banaszak Sz.: Conformity of Models and Measurements of Windings Deformations in Frequency Response Analysis Method, Przegląd Elektrotechniczny 7’2010, pp. 278-280.
• [4] Florkowski M., Furgał J.: Modeling of winding failures identification using the Frequency Response Analysis (FRA) method, Elect. Power Syst. Res., Vol.79,No. 7, 2009, pp. 1069-1075.
• [5] 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.
• [6] Bjerkan E., High Frequency Modeling of Power Transformers. Stresses and Diagnostics, Doctoral Thesis, Norwegian University of Science and Technology, 2005.
• [7] Gawrylczyk K.M, Banaszak Sz., TLM-Method for Computer Modeling of Transformers’ Windings Frequency Response, Electrical Engineering 69, Poznan University of Technology/PAN, 2012, pp. 41-47.