Comparative Study of Worldwide Standards for Interpreting Frequency Response Analysis (FRA) Results of Distribution Transformers

Abstract:

Distribution transformer in Malaysian electricity network is categorized as major element on delivering electricity throughout the nation. Advanced diagnostic tools are used to monitor any technical problem of transformer to sustain its capability in the long run. One type of it which is currently being used in worldwide is Frequency Response Analysis (FRA). The reliability from this method is proven worldwide in diagnosing transformer condition especially a mechanical movement. FRA technique is done by comparing the response result in transformer initial condition to its current condition. The interpretation of transformer condition from the response is based on frequency sub-bands. Each frequency sub-bands are indicating any movement parts of transformer and electrical faults. Currently, there are three worldwide standards established for interpreting the FRA results but both of them are different in frequency sub-bands range. Up to now, there are no research papers comparing the fault detection capabilities from frequency sub-bands range for both standards. In this paper, comparative study is done to visualize and interpret the capabilities from three standards (IEEE Std C57.149 2012, DL/T911-2004 and Cigre WG A2/26); by focus on the frequency sub-bands range.

• Periodical: Applied Mechanics and Materials (Volume 793)
• Pages: 144-148
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.793.144
• Online since: September 2015
• Authors: Sharin Ab Ghani*, Yasmin Hanum Md Thayoob, Young Zaidey Yang Ghazali, Mohd Shahril Ahmad Khiar, Imran Sutan Chairul, Mohd Safwan Mohamad
• Keywords: Cigre Wg A2/26, DL/T911-2004, FRA, Frequency Response Analysis, Frequency Sub-Bands, IEEE Std C57.149 2012, Interpretation, Transformer

References

[1] C. Sweetser, T. McGrail Sweep Frequency Response Analysis Transformer Applications, Doble Engineering Technical Paper, January (2003).

[2] W.H. Bartley, Failure Analysis of Transformers, The Hartford Steam Boiler Inspection and Insurance Co, 2008, pp.1-13.

[3] Ab Ghani, S.; Md Thayoob, Y.H.; Ghazali, Y.Z.Y.; Khiar, M.S.A.; Chairul, I.S., Evaluation of transformer core and winding conditions from SFRA measurement results using statistical techniques for distribution transformers, Power Engineering and Optimization Conference (PEDCO) Melaka, Malaysia, 2012 Ieee International , vol., no., pp.448-453.

DOI: 10.1109/peoco.2012.6230906

[4] Khiar, M.S.A.; Md Thayoob, Y.H.; Ghazali, Y.Z.Y.; Ab Ghani, S.; Chairul, I.S., Condition assessment of OLTC using duval triangle and static winding resistance test, Power Engineering and Optimization Conference (PEDCO) Melaka, Malaysia, 2012 Ieee International , vol., no., p.432.

DOI: 10.1109/peoco.2012.6230903

[5] Chairul, I.S.; Ghani, S.A.; Khiar, M.S.A.; Thayoob, Y.H.M.; Ghazali, Y.Z.Y., Kraft paper insulation's life assessment and effects of oxygen and moisture to paper insulation's deterioration rate, Power and Energy (PECon), 2012 IEEE International Conference on , vol., no., p.728.

DOI: 10.1109/pecon.2012.6450311

[6] J. Zhijian, Z. Minglin, Z. Zishu, Fault Location of Transformer Winding Deformation using Frequency Response Analysis, ISEM, 2001, pp.841-844.

DOI: 10.1109/iseim.2001.973809

[7] Omicron FRAnalyzer User Manual, Sweep frequency response analyzer for power transformer winding diagnosis, Omicron electronics, 2009, pp.1-114.

[8] Cigre WG A2/26, Mechanical Condition assessment of transformer winding using Frequency Response Analysis (FRA), Brochure 342, (2008).

[9] IEEE Standard Association, IEEE Guide for the Application and Interpretation of Frequency Response Analysis for Oil-Immersed Transformers, IEEE Std C57. 149 2012, IEEE Power and Energy Society, 8 March (2013).

DOI: 10.1109/ieeestd.2013.6475950