Identification of winding faults in electric machines using a high frequency method

High frequency measurements are used more and more frequently as a diagnostic tool for investigation of machine windings. As a base are measurement results of frequency dependencies of the winding admittance. Therefore, relations between different kinds of winding faults and changes of frequency dependencies of winding admittances should be determined. Much research work is done in that field, which is aiming to determine the sensitivity of this method and to develop the recognition criteria with regards to the type and range of faults. This paper presents the comparison of measurement results of the admittance performed on the electric machine windings of different construction. The influence of turn-to-turn faults between adjacent winding wires on the admittance waveform has been also investigated.

[1]  Domenico Casadei,et al.  Equivalent circuit of mush wound AC windings for high frequency analysis , 1997, ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics.

[2]  Ryszard Malewski,et al.  Impulse testing of power transformers using the transfer function method , 1988 .

[3]  Hamid A. Toliyat,et al.  Predicting the transient effects of PWM voltage waveform on the stator windings of random wound induction motors , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[4]  T. Leibfried,et al.  Diagnostics of power transformers by using the transfer function method , 1999 .

[5]  Hamid A. Toliyat,et al.  Predicting the transient effects of PWM voltage waveform on the stator windings of random wound induction motors , 1999 .

[6]  K. J. Cornick,et al.  A Computer Model for Calculating Steep-Fronted Surge Distribution in Machine Windings , 1989, IEEE Power Engineering Review.

[7]  M. M. Morcos,et al.  Application of AI tools in fault diagnosis of electrical machines and drives-an overview , 2003 .

[8]  Enrique E. Mombello,et al.  Study of internal stresses intransformer windings due to lightning transient phenomena , 1991 .

[9]  R.C. Degeneff,et al.  A general method for determining resonances in transformer windings , 1977, IEEE Transactions on Power Apparatus and Systems.

[10]  K. Feser,et al.  Transfer Function Method to Diagnose Axial Displacement and Radial Deformation of Transformer Winding , 2002, IEEE Power Engineering Review.

[11]  B. Heller,et al.  Surge phenomena in electrical machines , 1968 .