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Sadasiva Murthy, P.
- Assessment of Solid Insulationof Power Transformers through Dissolved Gas Analysis
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Authors
Affiliations
1 Dielectric Materials Division, Central Power Research Institute, Bangalore – 560080, IN
1 Dielectric Materials Division, Central Power Research Institute, Bangalore – 560080, IN
Source
Power Research, Vol 13, No 4 (2017), Pagination: 601-606Abstract
Power Transformers are the most vital equipment in a sub-station / Receiving station. Failure of a transformer leads to loss of revenue besides affecting reliability of power supply to consumers and also on cost. Hence assessment of transformers plays crucial role in the overall integrity of power system which includes remaining life of the equipment. In order to ensure that Power Transformers provide long and trouble-free service, several diagnostic tests are carried out and remedial actions initiated throughout their operational lifetime. It can be done by assessing the extent of degradation of the cellulosic paper & oil insulation through furan content in oil, degree of polymerization of paper insulation and dissolved gas analysis (DGA) in oil. This can help the utilities in making optimum use of the Transformers and also taking timely decisions regarding refurbishment / replacement of Transformers. Therefore, attempts are being made to discuss the details of furan analysis, degree of polymerization and DGA with few case studies in assessment of power transformers.Keywords
Power Transformers, Degree of Polymerization, Furan Content, Dissolved Gas Analysis
References
- Dipak Mehta andProf. Hitesh Jariwala, Predication of Life of Transformer insulation by developing Relationship between Degree of Polymerization and 2Furfural, International Journal of Scientific & Engineering Research, Volume 3, Issue 7, July-2012.
- Inderpreet Kaur and Preetinder Singh Residual Life assessment with DGA, Furan content in transformer oil and Degree of polymerization of solid insulation, International Journal of Scientific and Research Publications, Volume 6, Issue 7, July 2016.
- P.Sadasiva Murthy, D. Gnanasekaran and R.R. Sivaprakash, Maintenance of Power Transformers through solid insulation, Seminar onTechnology trends, in Design, Testing, Operation and Maintenance of Power and Distribution Transformersorganized by Central Power Research Institute, Bangalore on 26-27, October, 2017 .
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- IEC 61198 - Mineral insulating oils Methods for the determination of 2-furfural and related compounds
- ASTM D 5837 - Standard Test Method for Furanic Compounds in Electrical Insulating Liquids by High-Performance Liquid Chromatography (HPLC)
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