TLM-method for computer modeling of transformers’ windings frequency response

• Autorzy: Banaszak S. , Gawrylczyk K. M.
• Konferencja: Computer Applications in Electrical Engineering 2012 (23-24.04.2012; 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. For the aim of windings impedance modeling the transmission-line models are applied. The idea of TLM was presented in [1], While the length of transformer wires is comparable to wave length at high frequency, such approach is reasonable. The paper presents examples of models created for simple windings.

Słowa kluczowe

EN

power transformers; FRA; TLM; frequency response analysis (FRA)

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Poznan University of Technology Academic Journals. Electrical Engineering
• Rocznik: 2012
• Tom: No. 69
• Strony: 41--47
• Opis fizyczny: Bibliogr. 6 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] De Gersem H., Henze O., Weiland T., Binder A.: Simulation of wave propagation effects in machine windings, COMPEL, vol. 29, No.1, 2010, pp. 23-38.
• [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.