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Objective Interpretation of SFRA, in the Light of CIGRE TB 812


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1 HPL, Central Power Research Institute, Bengaluru – 560012, Karnataka, India
     

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The SFRA (Sweep Frequency Response Analysis) technique has become quite popular as a condition monitoring technique for transformers. The SFRA technique holds a vast repertoire of data in terms of the electromagnetic behaviour of the transformer. Much research has happened in comprehending this data but no effort has succeeded in determining a universal objective criterion for the interpretation of SFRA data. CIGRE study committee A2.53 has recently released Technical Brochure 812 which has been the result of nearly half a decade of international efforts in arriving at an objective criterion for the interpretation of SFRA. This paper discusses the state of the art in objective interpretation of SFRA data with special reference to TB 812. The paper also presents a case study in HPL where SFRA was compared to a conventional method.

Keywords

Frequency Response, Power Transformers, Statistical Analysis.
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  • CIGRE Working Group A2.26. Mechanical-condition assessment of transformer windings using Frequency Response Analysis (FRA). Brochure 342; 2008.

  • Measurement of frequency response. IEC 60076-18; 2012.

  • IEEE Guide for the application and interpretation of Frequency Response Analysis for oil-immersed transformers. IEEE Standard C57.149-2012; 2013.

  • Frequency Response Analysis on winding deformation of power transformers. DL/T 911; 2016.

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  • Sreeram V, Reddy SS, Gurudev T, Maroti M, Rajkumar M. Investigation into the correlation of SFRA numerical indices and short circuit reactance measurements of transformers. Proceedings of 2nd Springer International Conference (Virtual Mode) On Machine Learning, Advances in Computing, Renewable Energy and Communication (MARC 2020), 2020 Dec 17–18, Krishna Engineering College, New Delhi; 2020.


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  • Objective Interpretation of SFRA, in the Light of CIGRE TB 812

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Authors

V. Sreeram
HPL, Central Power Research Institute, Bengaluru – 560012, Karnataka, India
T Gurudev
HPL, Central Power Research Institute, Bengaluru – 560012, Karnataka, India
M. Rajkumar
HPL, Central Power Research Institute, Bengaluru – 560012, Karnataka, India
M. Maroti
HPL, Central Power Research Institute, Bengaluru – 560012, Karnataka, India
S. Sudhakara Reddy
HPL, Central Power Research Institute, Bengaluru – 560012, Karnataka, India

Abstract


The SFRA (Sweep Frequency Response Analysis) technique has become quite popular as a condition monitoring technique for transformers. The SFRA technique holds a vast repertoire of data in terms of the electromagnetic behaviour of the transformer. Much research has happened in comprehending this data but no effort has succeeded in determining a universal objective criterion for the interpretation of SFRA data. CIGRE study committee A2.53 has recently released Technical Brochure 812 which has been the result of nearly half a decade of international efforts in arriving at an objective criterion for the interpretation of SFRA. This paper discusses the state of the art in objective interpretation of SFRA data with special reference to TB 812. The paper also presents a case study in HPL where SFRA was compared to a conventional method.

Keywords


Frequency Response, Power Transformers, Statistical Analysis.

References





DOI: https://doi.org/10.33686/prj.v17i1.221895