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The ability of a detailed RLC model of a winding to calculate the transfer function (TF) and to demonstrate the effects of various winding damages on TF has been proven on small laboratory windings by previous studies. However, this ability is not adequately known for real high-voltage windings. Hence, a 400 kV disc winding consisting of 86 discs is used in this work to study, whether the detailed model is able to represent the behaviour of large-power windings in a TF form. In addition, disc space variation (DSV), known as a frequently occurring mechanical damage in transformers, is analysed experimentally and mathematically. The accuracy of the model to identify the DSV is verified with the help of the measured TFs.
References
-
-
1)
-
Nothaft, M.: `Untersuchung der Resonanzvorgänge in Wicklungen von Hochspannungsleistungstransformatoren Mittels Eines Detaillierten Modells', 1995, PhD, TH Karlsruhe, Karlsruhe, Germany.
-
2)
-
Coffeen, L., Britton, J., Rickmann, K.: `A new technique to detect winding displacements in power transformers using frequency response analysis', Proc. IEEE Bologna Power Tech Conf., 2003, Bologna, Italy, p. 1–7.
-
3)
-
J. Bak-Jensen ,
B. Bak-Jensen ,
S.D. Mikkelsen
.
Detection of faults and ageing phenomena in transformers by transfer functions.
IEEE Trans. Power Deliv.
,
1 ,
308 -
314
-
4)
-
Rahimpour, E., Tenbohlen, S.: `A mathematical model to investigate disc space variation in power transformer using transfer function analysis', 15thInt. Symp. High Voltage Engineering, August 2007, Paper No. T7–146.
-
5)
-
T. Leibfried ,
K. Feser
.
Monitoring of power transformers using the transfer function method.
IEEE Trans. Power Deliv.
,
4 ,
1333 -
1341
-
6)
-
J. Christian ,
K. Feser
.
Procedures for detecting winding displacements in power transformers by the transfer function method.
IEEE Trans. Power Deliv.
,
1 ,
214 -
220
-
7)
-
R. Malewski ,
M.A. Franchek ,
J.H. McWhriter
.
Experimental validation of a computer model simulating an impulse voltage distribution in HV transformer windings.
IEEE Trans. Power Deliv.
,
4 ,
1789 -
1798
-
8)
-
E. Rahimpour ,
J. Christian ,
K. Feser ,
H. Mohseni
.
Transfer function method to diagnose axial displacement and radial deformation of transformer windings.
IEEE Trans. Power Deliv.
,
2 ,
493 -
505
-
9)
-
Bjerkan, E.: `High frequency modelling of power transformers, stresses and diagnostics', 2005, PhD, Norwegian University of Science and Technology, Trondheim.
-
10)
-
Cigre Working Group A2.26.: ‘Mechanical-condition assessment of transformer windings using frequency response analysis (FRA)’, 2007.
-
11)
-
W. Dietrich
.
Berechnung der Wirbelstromverluste in den Wicklungen von Mehrwicklungstransformatoren.
ETZ Arch.
,
10 ,
309 -
317
-
12)
-
G.B. Gharehpetian ,
H. Mohseni ,
K. Möller
.
Hybrid modeling of inhomogeneous transformer windings for very fast transient overvoltage studies.
IEEE Trans. Power Deliv.
,
1 ,
157 -
163
-
13)
-
Leibfried, T.: `Die Analyze der Übertragungsfunktion als Methode zur Überwachung des Isolationszustandes von Großtransformatoren', 1996, PhD, Institute of Power Transmission and High Voltage Technology (IEH), University of Stuttgart, Stuttgart, Germany.
-
14)
-
A. Miki ,
T. Hosoya ,
K. Okuyama
.
A calculation method for impulse voltage distribution and transferred voltage in transformer windings.
IEEE Trans. Power Appar. Syst.
,
930 -
939
-
15)
-
Wimmer, R., Tenbohlen, S., Heindl, M., Kraetge, A., Krüger, M., Christian, J.: `Development of Algorithms to Assess the FRA', 15thInt. Symp. High Voltage Engineering, August 2007, Paper No. T7–523.
-
16)
-
J.C. Lagarias ,
J.A. Reeds ,
M.H. Wright ,
P.E. Wright
.
Convergence properties of the nelder-mead simplex method in low dimensions.
J. Optim.
,
1 ,
112 -
147
-
17)
-
F. de. Leon ,
A. Semlyen
.
Complete transformer model for electromagnetic transients.
IEEE Trans. Power Deliv.
,
1 ,
231 -
239
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