Large Salient Pole Synchronous Machines Field Windings Diagnosis by Frequency Response

Frequency Response Analysis is a well-known technique for the diagnosis of power transformers. Currently, this technique is under research for its application in rotary electrical machines. This paper presents the application of FRA to the diagnosis of poles of the field winding of synchronous machines. Numerous tests have been performed with ground fault and inter-turn fault in a pole of the field winding of a large commercial size synchronous generator. This technique has been validated through numerous experimental laboratory tests in a pole of a 40 MVA synchronous generator with satisfactory results.

[1]  A. A. Reykherdt,et al.  Effects of test cable ground extensions on repeatability of frequency response analysis measurements on power transformers , 2012, IEEE Electrical Insulation Magazine.

[2]  J. Pleite,et al.  Implementación de un Modelo de un Transformador Eléctrico para el Análisis de su Respuesta en Frecuencia , 2011 .

[3]  F. R. Blanquez,et al.  Evaluation of the applicability of FRA for inter-turn fault detection in stator windings , 2013, 2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED).

[4]  M. S. Naderi,et al.  Advanced transformer winding deformation diagnosis: moving from off-line to on-line , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[5]  Z.D. Wang,et al.  Investigations on sensitivity of FRA technique in diagnosis of transformer winding deformations , 2004, Conference Record of the 2004 IEEE International Symposium on Electrical Insulation.

[6]  A A Reykherdt,et al.  Case studies of factors influencing frequency response analysis measurements and power transformer diagnostics , 2011, IEEE Electrical Insulation Magazine.

[7]  D.M. Sofian,et al.  Interpretation of Transformer FRA Responses— Part I: Influence of Winding Structure , 2009, IEEE Transactions on Power Delivery.

[8]  Enrique E. Mombello,et al.  Sweep frequency response analysis (SFRA) for the assessment of winding displacements and deformation in power transformers , 2008 .

[9]  A.J. Vandermaar,et al.  Transformer winding movement monitoring in service - key factors affecting FRA measurements , 2004, IEEE Electrical Insulation Magazine.

[10]  Asghar Akbari,et al.  Partial discharge localization in transformer windings using multi-conductor transmission line model , 2008 .

[11]  A. Abu-Siada,et al.  Understanding power transformer frequency response analysis signatures , 2013, IEEE Electrical Insulation Magazine.

[12]  Mehdi Bagheri,et al.  Frequency response analysis and short-circuit impedance measurement in detection of winding deformation within power transformers , 2013, IEEE Electrical Insulation Magazine.

[13]  Syed Islam.  Detection of shorted turns and winding movements in large power transformers using frequency response analysis , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).