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Vol. 26. Issue 1.
Pages 9-16 (January - June 2014)
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Vol. 26. Issue 1.
Pages 9-16 (January - June 2014)
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Condition and risk assessment of power transformers: a general approach to calculate a Health Index
M. Augusta Martins
LABELEC, Rua Cidade Goa, N° 4, 2685-039 Sacavém, Portugal
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Power transformers are the most important assets in substations and play an important role in the reliability of electrical systems and in the quality of the energy delivered. As the population of transformers in service is getting old, much attention must be focused on transformers availability and reliability. So the condition and risk assessment of the transformers are more and more important to improve the transformers performance, extend their useful life, to decrease costs and to take the best technical and economic decisions, concerning their life cycle management. The “Health Index” was developed to assess and classify transformers based on their condition and to support decisions, concerning refurbishment and replacement. The basic concepts associated to the “Health Index” and to its calculation method are explained here, in a summarized way. An example of the application of this method to a transformer is also given here. Finally, the advantage of the combination of this index with the “Criticality index” is also highlighted.

risk assessment
condition assessment
health index
criticality index.
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E. Rijks, G. Sanchis, G. Ford, E. Hill, Y. Tsinberg, T. Krontiris, P. Schuett, M. Zunec, K. Sand.
Electra, 262 (2012), pp. 44
W. Bartley, Breakthrough. asset management for the restructured. power industry, Oct. 10-11, Salt Lake City, USA, (2002).
B. Gorgan, P. Nothingher, L. Badicu, G. Tanasescu.
Annals of the Univ. of Craiova Elect. Eng. Series, 34 (2010), pp. 13
A. Jahromi, S. Cress, R. Piercy, W. Fan, J. Service.
J. Elect. Electr. Eng, 2 (2009), pp. 192
A. Jahromi, R. Piercy, S. Cress, J. Service, W. Fan.
IEEE Elect. Ins. Mag, 25 (2009), pp. 20
F. Scatiggio, M. Pompili, 2013 Electrical. Insulation Conference, Ottawa, Ontario, Canada, 2-5 June, 178 (2013).
J. Flores, H. Covarrubias, R. Fernandez, 79thAnn. Int. Doble Client Conf. Boston, USA, (2012).
C. Beauchemin, J. Aubin, CIGRÉ SCA2 & D1 Joint Colloquium, Kyoto, Japan (2011).
CIGRÉ Technical Brochure 227, Guide for life management Techniques for power transformers, (2003).
T. Hjartarson, S. Otal, IEEE Conf. (2006).
J. Aubin; B. Sparling, TechCon North America Ponte Vedra, FL, March, 2 (2010).
IEC 60599, Ed. 2, Mineral oil–impregnated electrical equipment in service–Guide to the interpretation of dissolved and free gases analysis, Edition 2.0, March (1999).
IEEE 57.104, IEEE Guide for the interpretation of gases generated in oil–immersed transformers, Transformer Committee of PES, (1991).
Report of CIGRÉ WG A2.37, Electra, 261, (2012).
IEC 60422, Mineral Insulating Oils in Electrical Equipment-Supervision and Maintenance Guide, Edition 4.0, January (2013).
IEC 62535, Insulating Liquids – Test method for detection of potentially corrosive sulphur in used and unused insulating oil, Ed.1, October (2008).
DIN 51353, Detection of corrosive sulphur, December (1985).
Y. Li, M. Tang, F. Wu, G. Zhang, S. Wang, Suwarno, Int. J. Elect. Eng. Inf. 5, 34 (2013).
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