Replacement of Power Transformers basis on Diagnostic Results and Load Forecasting

This paper describes interconnection between technical and economical making decision. The reason of this dealing could be different: poor technical condition, change of substation (electrical network) regime, power transformer owner budget deficit and increasing of tariff on electricity. Establishing of recommended practice as well as to give general advice and guidance in economical sector, testing, diagnostic power transformers to establish its conditions, identify problems and provide potential remedies.




References:
[1] S. P. Mehta and W. R. Henning, "Transformer Testing, part 3.16"
current ed. ANSI/IEEE C57.12.00-1993.
[2] CIGRE Working Group 12.18 "Life Management Techniques for
Power Transformers," Final report, CIGRE SC 12, 2002.
[3] CIGRE Working Group A2.23 "Guide on transformer lifetime data
management," CIGRE, August 2006.
[4] Meter Test Equipment, "Portable and Stationary Test Equipment for
Measurement and Certification of Electricity Meters," ed.04, pp.14,
2010.
[5] M. Horning, J. Kelly and S. Myers, "Transformer Maintenance Guide,"
ed. 3rd, S D Myers Inc., 2004, p. 437
[6] S.Guseva, O.Borscevskis, N.Skobeleva, N.Breners. Load forecasting till
2020 of existing and perspective transformer substations in Riga.
Proceedings of Riga Technical University, Power and Electrical
Engineering, ser. 4, Vol. 25, Riga, 2009. p. 77-80.
[7] S. Guseva, O. Borscevskis, N. Skobeleva, and L. Kozireva, "Load
Determination and Selection of Transformer Substations- Optimal
Power for Tasks of Urban Networks- Development," Power and
Electrical Engineering, vol. 27, no. 4, RTU, Riga, pp. 31-36, 2010.
[8] Krishans Z. Fundamentals of Power Engineering Enterprises
Managment. Riga, Riga Techical University, 1997. 122 p. (in Latvian).
[9] A/S ÔÇ×Latvenergo" development program till 2020.