Affiliation:
1. ONDOKUZ MAYIS ÜNİVERSİTESİ
Abstract
Power transformers are expensive pieces of electrical equipment that are used to connect transmission and distribution networks. Power transformers are inspected and tested on a regular basis throughout production, shipment, installation, and operation. There are several ways for determining the mechanical integrity of power transformers. Power transformers are monitored using these diagnostic procedures, and any breakdowns and issues are avoided. Scanning Frequency Response Analysis (SFRA) is an efficient method for determining the condition of the transformer core and windings. To evaluate the state of the transformer winding, SFRA, winding direct current resistance, and winding capacitance tests were done in this study. In the case study, a comprehensive case analysis was done on the SFRA test findings for a 50/62.5 MVA power transformer, and the results were analyzed. The results reveal that the SFRA test finds structural winding problems in transformers with high accuracy.
Reference47 articles.
1. [1] M. Bagheri, Mohammad S. Naderi, T. Blackburn, and B. T. Phung, “Dean-Stark vs FDS and KFT methods in moisture content recognition of transformer,” presented at the IEEE International Conference on Power Energy (PECON’12), Kota Kinabalu, Malaysia, Dec 2-5, 2012.
2. [2] H. William and P.E. Bartley, “Life cycle management of utility transformer assets,” The Hartford Steam Boiler Inspection and Insurance Company, Breakthrough Asset Management for the Restructured Power Industry, Salt Lake City, Utah, 2002.
3. [3] A. Paleri et al., “Frequency Response Analysis (SFRA) in power transformers: An approach to locate inter-disk SC fault,” presented at 2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), IEEE, Bangalore, India, 2017.
4. [4] J.R. Secue and E. Mombello, “Sweep frequency response Analysis (SSFRA) for the assessment of winding displacements and deformation in power transformers,” Electric Power Research, vol. 78, no. 6, pp. 1119 – 1128, 2008.
5. [5] A.A. Pandya and B.R. Parekh, “Interpretation of sweep frequency response analysis (SSFRA) traces for the open circuit and short circuit winding fault damages of the power transformer,” Int. J. Electr. Power Energy Syst., vol. 62, pp. 890-896, 2014.