Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2012.7.6.876
Title & Authors
Study on the Transfer Functions for Detecting Windings Displacement of Power Transformers with Impulse Method Shon, Chae-Hwa; Yi, Sang-Hwa; Lee, Heun-Jin; Kang, Dong-Sik;
The paper investigates three types of transfer function methods for detecting displacements of winding in a model transformer. To acquire these transfer functions, the measuring method of input voltage, current and its response is used in impulse method. The applied impulse voltages had three rising times, which were short rising time (less than 0.6 ), medium rising time (about 0.8 ) and long rising time (about 1 ) in front waves. Every 10 measurements of voltage and current waves were averaged from 50 measurements of voltage and current waves. These transfer functions were tested in normal, 24mm elevated and 48mm elevated windings conditions and were analyzed with correlation coefficients and spectrum deviations. In the analysis, the results depend on the types of transfer functions and the rising times of input voltages.
High Efficiency Step-Down Flyback Converter Using Coaxial Cable Coupled-Inductor, Journal of Power Electronics, 2013, 13, 2, 214
Ability to Withstand Short Circuit, 1979, IEC Std. 60076-5 Power Transformers Part 5.
Jochen Christian and Kurt Feser, "Procedure for detecting winding displacements in Power Transformers by the transfer function method.", IEEE trans. Power Delivery Vol. 19, No. 1, pp. 214-220, Jan. 2004.
S.A. Ryder, "Methods for comparing frequency response analysis measurement", 2002 IEEE International Symposium on Electrical Insulation, Boston, MA USA, April 7-10, 2002, pp. 187-190.
S.A. Ryder, "Diagnosing transformer faults using frequency response analysis.", IEEE Electrical Insulation Magazine, Vol. 19, No.2, pp. 16-22, March/ April, 2003
J. Bak-Jensen, B. Bak-Jensen and S.D. Mikkelsen, "Detection of faults and aging phenomena in transformers by transfer functions.", IEEE trans. Power Delivery Vol. 10, No. 1, pp. 308-314, Jan. 1995.
C.H. Shon, K.H. Kim, S.H. Yi, H.J. Lee and D.S. Kang, "The characteristics of the impulse input module of LVI tester system", International Conference Proceedings of CMD 2010, Tokyo Japan, Sep. 2010.
D.K. Xu, C.Z. Fu and Y.M. Li, "Application of neural network to the detection of the transformer winding deformation", International Symposium on High Voltage Engineering, London U.K., 1999.